From 410ad4d0f9ff166610655bae31328e4120b17ef2 Mon Sep 17 00:00:00 2001
From: Hubert Denkmair <xor@xor.wtf>
Date: Wed, 8 Mar 2023 12:05:58 +0100
Subject: [PATCH 01/16] add basic STM32G0 support

---
 src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c |  86 +++++++--
 .../st/stm32_fsdev/dcd_stm32_fsdev_pvt_st.h   | 180 +++++++++++++-----
 2 files changed, 198 insertions(+), 68 deletions(-)

diff --git a/src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c b/src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c
index e49c0b52e..21ae8e6e8 100644
--- a/src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c
+++ b/src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c
@@ -216,7 +216,7 @@ TU_ATTR_ALWAYS_INLINE static inline void reg16_clear_bits(__IO uint16_t *reg, ui
 }
 
 // Bits in ISTR are cleared upon writing 0
-TU_ATTR_ALWAYS_INLINE static inline void clear_istr_bits(uint16_t mask) {
+TU_ATTR_ALWAYS_INLINE static inline void clear_istr_bits(uint32_t mask) {
   USB->ISTR = ~mask;
 }
 
@@ -242,16 +242,23 @@ void dcd_init (uint8_t rhport)
   {
     asm("NOP");
   }
+
+#ifdef PMA_32BIT_ACCESS // CNTR register is 32bits on STM32G0, 16bit on older versions
+  USB->CNTR &= ~USB_CNTR_PDWN;
+#else
   reg16_clear_bits(&USB->CNTR, USB_CNTR_PDWN);// Remove powerdown
+#endif
+
   // Wait startup time, for F042 and F070, this is <= 1 us.
   for(uint32_t i = 0; i<200; i++) // should be a few us
   {
     asm("NOP");
   }
   USB->CNTR = 0; // Enable USB
-  
-  USB->BTABLE = DCD_STM32_BTABLE_BASE;
 
+#ifndef STM32G0 // BTABLE register does not exist any more on STM32G0, it is fixed to USB SRAM base address
+  USB->BTABLE = DCD_STM32_BTABLE_BASE;
+#endif
   USB->ISTR = 0; // Clear pending interrupts
 
   // Reset endpoints to disabled
@@ -312,7 +319,7 @@ void dcd_sof_enable(uint8_t rhport, bool en)
   }
   else
   {
-    USB->CNTR &= (uint16_t) ~USB_CNTR_SOFM;
+    USB->CNTR &= ~USB_CNTR_SOFM;
   }
 }
 
@@ -358,6 +365,9 @@ void dcd_int_enable (uint8_t rhport)
   NVIC_EnableIRQ(USB_LP_IRQn);
   NVIC_EnableIRQ(USBWakeUp_IRQn);
 
+#elif CFG_TUSB_MCU == OPT_MCU_STM32G0
+  NVIC_EnableIRQ(USB_UCPD1_2_IRQn);
+
 #elif CFG_TUSB_MCU == OPT_MCU_STM32WB
   NVIC_EnableIRQ(USB_HP_IRQn);
   NVIC_EnableIRQ(USB_LP_IRQn);
@@ -405,6 +415,9 @@ void dcd_int_disable(uint8_t rhport)
   NVIC_DisableIRQ(USB_LP_IRQn);
   NVIC_DisableIRQ(USBWakeUp_IRQn);
 
+#elif CFG_TUSB_MCU == OPT_MCU_STM32G0
+  NVIC_DisableIRQ(USB_UCPD1_2_IRQn);
+
 #elif CFG_TUSB_MCU == OPT_MCU_STM32WB
   NVIC_DisableIRQ(USB_HP_IRQn);
   NVIC_DisableIRQ(USB_LP_IRQn);
@@ -433,7 +446,7 @@ void dcd_remote_wakeup(uint8_t rhport)
 {
   (void) rhport;
 
-  USB->CNTR |= (uint16_t) USB_CNTR_RESUME;
+  USB->CNTR |= USB_CNTR_RESUME;
   remoteWakeCountdown = 4u; // required to be 1 to 15 ms, ESOF should trigger every 1ms.
 }
 
@@ -534,9 +547,6 @@ static void dcd_ep_ctr_rx_handler(uint32_t wIstr)
   
   if((ep_addr == 0U) && ((wEPRegVal & USB_EP_SETUP) != 0U)) /* Setup packet */
   {
-    // The setup_received function uses memcpy, so this must first copy the setup data into
-    // user memory, to allow for the 32-bit access that memcpy performs.
-    uint8_t userMemBuf[8];
     uint32_t count = pcd_get_ep_rx_cnt(USB, EPindex);
     /* Get SETUP Packet*/
     if(count == 8) // Setup packet should always be 8 bytes. If not, ignore it, and try again.
@@ -544,8 +554,15 @@ static void dcd_ep_ctr_rx_handler(uint32_t wIstr)
       // Must reset EP to NAK (in case it had been stalling) (though, maybe too late here)
       pcd_set_ep_rx_status(USB,0u,USB_EP_RX_NAK);
       pcd_set_ep_tx_status(USB,0u,USB_EP_TX_NAK);
-      dcd_read_packet_memory(userMemBuf, *pcd_ep_rx_address_ptr(USB,EPindex), 8);
+#ifdef PMA_32BIT_ACCESS
+      dcd_event_setup_received(0, (uint8_t*)(USB_PMAADDR + pcd_get_ep_rx_address(USB, EPindex)), true);
+#else
+      // The setup_received function uses memcpy, so this must first copy the setup data into
+      // user memory, to allow for the 32-bit access that memcpy performs.
+      uint8_t userMemBuf[8];
+      dcd_read_packet_memory(userMemBuf, pcd_get_ep_rx_address(USB,EPindex), 8);
       dcd_event_setup_received(0, (uint8_t*)userMemBuf, true);
+#endif
     }
   }
   else
@@ -568,7 +585,7 @@ static void dcd_ep_ctr_rx_handler(uint32_t wIstr)
 
     if (count != 0U)
     {
-      uint16_t addr = *pcd_ep_rx_address_ptr(USB, EPindex);
+      uint16_t addr = pcd_get_ep_rx_address(USB, EPindex);
 
       if (xfer->ff)
       {
@@ -672,8 +689,13 @@ void dcd_int_handler(uint8_t rhport) {
 
   if (int_status & USB_ISTR_WKUP)
   {
+#ifdef PMA_32BIT_ACCESS // CNTR register is 32bits on STM32G0, 16bit on older versions
+    USB->CNTR &= ~USB_CNTR_LPMODE;
+    USB->CNTR &= ~USB_CNTR_FSUSP;
+#else
     reg16_clear_bits(&USB->CNTR, USB_CNTR_LPMODE);
     reg16_clear_bits(&USB->CNTR, USB_CNTR_FSUSP);
+#endif
     clear_istr_bits(USB_ISTR_WKUP);
     dcd_event_bus_signal(0, DCD_EVENT_RESUME, true);
   }
@@ -695,7 +717,7 @@ void dcd_int_handler(uint8_t rhport) {
   if(int_status & USB_ISTR_ESOF) {
     if(remoteWakeCountdown == 1u)
     {
-      USB->CNTR &= (uint16_t)(~USB_CNTR_RESUME);
+      USB->CNTR &= ~USB_CNTR_RESUME;
     }
     if(remoteWakeCountdown > 0u)
     {
@@ -722,8 +744,13 @@ void dcd_edpt0_status_complete(uint8_t rhport, tusb_control_request_t const * re
     uint8_t const dev_addr = (uint8_t) request->wValue;
 
     // Setting new address after the whole request is complete
+#ifdef PMA_32BIT_ACCESS
+    USB->DADDR &= ~USB_DADDR_ADD;
+    USB->DADDR = (USB->DADDR & ~USB_DADDR_ADD_Msk) | dev_addr; // leave the enable bit set
+#else
     reg16_clear_bits(&USB->DADDR, USB_DADDR_ADD);
     USB->DADDR = (uint16_t)(USB->DADDR | dev_addr); // leave the enable bit set
+#endif
   }
 }
 
@@ -925,14 +952,14 @@ bool dcd_edpt_open (uint8_t rhport, tusb_desc_endpoint_t const * p_endpoint_desc
 
   if( (dir == TUSB_DIR_IN) || (wType == USB_EP_ISOCHRONOUS) )
   {
-    *pcd_ep_tx_address_ptr(USB, ep_idx) = pma_addr;
+    pcd_set_ep_tx_address(USB, ep_idx, pma_addr);
     pcd_set_ep_tx_bufsize(USB, ep_idx, buffer_size);
     pcd_clear_tx_dtog(USB, ep_idx);
   }
 
   if( (dir == TUSB_DIR_OUT) || (wType == USB_EP_ISOCHRONOUS) )
   {
-    *pcd_ep_rx_address_ptr(USB, ep_idx) = pma_addr;
+    pcd_set_ep_rx_address(USB, ep_idx, pma_addr);
     pcd_set_ep_rx_bufsize(USB, ep_idx, buffer_size);
     pcd_clear_rx_dtog(USB, ep_idx);
   }
@@ -1011,10 +1038,10 @@ bool dcd_edpt_iso_alloc(uint8_t rhport, uint8_t ep_addr, uint16_t largest_packet
   xfer_ctl_ptr(ep_addr)->ep_idx = ep_idx;
 
   pcd_set_eptype(USB, ep_idx, USB_EP_ISOCHRONOUS);
-  
-  *pcd_ep_tx_address_ptr(USB, ep_idx) = pma_addr;
-  *pcd_ep_rx_address_ptr(USB, ep_idx) = pma_addr;
-  
+
+  pcd_set_ep_tx_address(USB, ep_idx, pma_addr);
+  pcd_set_ep_rx_address(USB, ep_idx, pma_addr);
+
   return true;
 }
 
@@ -1063,7 +1090,7 @@ static void dcd_transmit_packet(xfer_ctl_t * xfer, uint16_t ep_ix)
   }
 
   uint16_t ep_reg = pcd_get_endpoint(USB, ep_ix);
-  uint16_t addr_ptr = *pcd_ep_tx_address_ptr(USB,ep_ix);
+  uint16_t addr_ptr = pcd_get_ep_tx_address(USB, ep_ix);
 
   if (xfer->ff)
   {
@@ -1197,6 +1224,19 @@ void dcd_edpt_clear_stall (uint8_t rhport, uint8_t ep_addr)
   }
 }
 
+#ifdef PMA_32BIT_ACCESS
+static bool dcd_write_packet_memory(uint16_t dst, const void *__restrict src, size_t wNBytes)
+{
+  // FIXME original function uses byte-access to source memory (to support non-aligned buffers)
+  const uint32_t* src32 = (uint32_t*)(src);
+  uint32_t* dst32 = (uint32_t*)(USB_PMAADDR + dst);
+  for (unsigned n=wNBytes/4; n>0; --n) {
+    *dst32++ = *src32++;
+  }
+  *dst32 = (*src32) & ((1<<8*(wNBytes % 4)) - 1);
+  return true;
+}
+#else
 // Packet buffer access can only be 8- or 16-bit.
 /**
   * @brief Copy a buffer from user memory area to packet memory area (PMA).
@@ -1239,6 +1279,7 @@ static bool dcd_write_packet_memory(uint16_t dst, const void *__restrict src, si
 
   return true;
 }
+#endif
 
 /**
   * @brief Copy from FIFO to packet memory area (PMA).
@@ -1290,6 +1331,14 @@ static bool dcd_write_packet_memory_ff(tu_fifo_t * ff, uint16_t dst, uint16_t wN
   return true;
 }
 
+#ifdef PMA_32BIT_ACCESS
+static bool dcd_read_packet_memory(void *__restrict dst, uint16_t src, size_t wNBytes)
+{
+    // FIXME this should probably be modified for possible unaligned access?
+    memcpy(dst, (void*)(USB_PMAADDR+src), wNBytes);
+    return true;
+}
+#else
 /**
   * @brief Copy a buffer from packet memory area (PMA) to user memory area.
   *        Uses byte-access of system memory and 16-bit access of packet memory
@@ -1323,6 +1372,7 @@ static bool dcd_read_packet_memory(void *__restrict dst, uint16_t src, size_t wN
   }
   return true;
 }
+#endif
 
 /**
   * @brief Copy a buffer from user packet memory area (PMA) to FIFO.
diff --git a/src/portable/st/stm32_fsdev/dcd_stm32_fsdev_pvt_st.h b/src/portable/st/stm32_fsdev/dcd_stm32_fsdev_pvt_st.h
index 015b177cf..686bfaa66 100644
--- a/src/portable/st/stm32_fsdev/dcd_stm32_fsdev_pvt_st.h
+++ b/src/portable/st/stm32_fsdev/dcd_stm32_fsdev_pvt_st.h
@@ -82,6 +82,34 @@
   #include "stm32g4xx.h"
   #define PMA_LENGTH (1024u)
 
+#elif CFG_TUSB_MCU == OPT_MCU_STM32G0
+  #include "STM32/stm32g0xx.h"
+  #define PMA_32BIT_ACCESS
+  #define PMA_LENGTH (1024u) // FIXME it is 2048, really
+  #undef USB_PMAADDR
+  #define USB_PMAADDR USB_DRD_PMAADDR
+  #define USB_TypeDef USB_DRD_TypeDef
+  #define EP0R CHEP0R
+  #define USB_EP_CTR_RX USB_EP_VTRX
+  #define USB_EP_CTR_TX USB_EP_VTTX
+  #define USB_EP_T_FIELD USB_CHEP_UTYPE
+  #define USB_EPREG_MASK USB_CHEP_REG_MASK
+  #define USB_EPTX_DTOGMASK USB_CHEP_TX_DTOGMASK
+  #define USB_EPRX_DTOGMASK USB_CHEP_RX_DTOGMASK
+  #define USB_EPTX_DTOG1 USB_CHEP_TX_DTOG1
+  #define USB_EPTX_DTOG2 USB_CHEP_TX_DTOG2
+  #define USB_EPRX_DTOG1 USB_CHEP_RX_DTOG1
+  #define USB_EPRX_DTOG2 USB_CHEP_RX_DTOG2
+  #define USB_EPRX_STAT USB_CH_RX_VALID
+  #define USB_EPKIND_MASK USB_EP_KIND_MASK
+  #define USB USB_DRD_FS
+  #define USB_CNTR_FRES USB_CNTR_USBRST
+  #define USB_CNTR_RESUME USB_CNTR_L2RES
+  #define USB_ISTR_EP_ID USB_ISTR_IDN
+  #define USB_EPADDR_FIELD USB_CHEP_ADDR
+  #define USB_CNTR_LPMODE USB_CNTR_SUSPRDY
+  #define USB_CNTR_FSUSP USB_CNTR_SUSPEN
+
 #elif CFG_TUSB_MCU == OPT_MCU_STM32WB
   #include "stm32wbxx.h"
   #define PMA_LENGTH (1024u)
@@ -105,15 +133,31 @@
   #define PMA_STRIDE  (1u)
 #endif
 
-// And for type-safety create a new macro for the volatile address of PMAADDR
+// For type-safety create a new macro for the volatile address of PMAADDR
 // The compiler should warn us if we cast it to a non-volatile type?
+#ifdef PMA_32BIT_ACCESS
+static __IO uint32_t * const pma32 = (__IO uint32_t*)USB_PMAADDR;
+#else
 // Volatile is also needed to prevent the optimizer from changing access to 32-bit (as 32-bit access is forbidden)
 static __IO uint16_t * const pma = (__IO uint16_t*)USB_PMAADDR;
 
-// prototypes
-TU_ATTR_ALWAYS_INLINE static inline __IO uint16_t* pcd_ep_rx_cnt_ptr(USB_TypeDef * USBx, uint32_t bEpIdx);
-TU_ATTR_ALWAYS_INLINE static inline __IO uint16_t* pcd_ep_tx_cnt_ptr(USB_TypeDef * USBx, uint32_t bEpIdx);
-TU_ATTR_ALWAYS_INLINE static inline void pcd_set_endpoint(USB_TypeDef * USBx, uint32_t bEpIdx, uint32_t wRegValue);
+TU_ATTR_ALWAYS_INLINE static inline __IO uint16_t * pcd_btable_word_ptr(USB_TypeDef * USBx, size_t x)
+{
+  size_t total_word_offset = (((USBx)->BTABLE)>>1) + x;
+  total_word_offset *= PMA_STRIDE;
+  return &(pma[total_word_offset]);
+}
+
+TU_ATTR_ALWAYS_INLINE static inline __IO uint16_t* pcd_ep_tx_cnt_ptr(USB_TypeDef * USBx, uint32_t bEpIdx)
+{
+  return pcd_btable_word_ptr(USBx,(bEpIdx)*4u + 1u);
+}
+
+TU_ATTR_ALWAYS_INLINE static inline __IO uint16_t* pcd_ep_rx_cnt_ptr(USB_TypeDef * USBx, uint32_t bEpIdx)
+{
+  return pcd_btable_word_ptr(USBx,(bEpIdx)*4u + 3u);
+}
+#endif
 
 /* Aligned buffer size according to hardware */
 TU_ATTR_ALWAYS_INLINE static inline uint16_t pcd_aligned_buffer_size(uint16_t size)
@@ -131,13 +175,22 @@ TU_ATTR_ALWAYS_INLINE static inline uint16_t pcd_aligned_buffer_size(uint16_t si
 /* SetENDPOINT */
 TU_ATTR_ALWAYS_INLINE static inline void pcd_set_endpoint(USB_TypeDef * USBx, uint32_t bEpIdx, uint32_t wRegValue)
 {
+#ifdef PMA_32BIT_ACCESS
+  __O uint32_t *reg = (__O uint32_t *)(USB_DRD_BASE + bEpIdx*4);
+  *reg = wRegValue;
+#else
   __O uint16_t *reg = (__O uint16_t *)((&USBx->EP0R) + bEpIdx*2u);
   *reg = (uint16_t)wRegValue;
+#endif
 }
 
 /* GetENDPOINT */
-TU_ATTR_ALWAYS_INLINE static inline uint16_t pcd_get_endpoint(USB_TypeDef * USBx, uint32_t bEpIdx) {
+TU_ATTR_ALWAYS_INLINE static inline uint32_t pcd_get_endpoint(USB_TypeDef * USBx, uint32_t bEpIdx) {
+#ifdef PMA_32BIT_ACCESS
+  __I uint32_t *reg = (__I uint32_t *)(USB_DRD_BASE + bEpIdx*4);
+#else
   __I uint16_t *reg = (__I uint16_t *)((&USBx->EP0R) + bEpIdx*2u);
+#endif
   return *reg;
 }
 
@@ -187,34 +240,22 @@ TU_ATTR_ALWAYS_INLINE static inline void pcd_clear_tx_ep_ctr(USB_TypeDef * USBx,
   */
 TU_ATTR_ALWAYS_INLINE static inline uint32_t pcd_get_ep_tx_cnt(USB_TypeDef * USBx, uint32_t bEpIdx)
 {
+#ifdef PMA_32BIT_ACCESS
+  return (pma32[2*bEpIdx] & 0x03FF0000) >> 16;
+#else
   __I uint16_t *regPtr = pcd_ep_tx_cnt_ptr(USBx, bEpIdx);
   return *regPtr & 0x3ffU;
+#endif
 }
 
 TU_ATTR_ALWAYS_INLINE static inline uint32_t pcd_get_ep_rx_cnt(USB_TypeDef * USBx, uint32_t bEpIdx)
 {
+#ifdef PMA_32BIT_ACCESS
+  return (pma32[2*bEpIdx + 1] & 0x03FF0000) >> 16;
+#else
   __I uint16_t *regPtr = pcd_ep_rx_cnt_ptr(USBx, bEpIdx);
   return *regPtr & 0x3ffU;
-}
-
-/**
-  * @brief  Sets counter of rx buffer with no. of blocks.
-  * @param  dwReg Register
-  * @param  wCount Counter.
-  * @param  wNBlocks no. of Blocks.
-  * @retval None
-  */
-TU_ATTR_ALWAYS_INLINE static inline void pcd_set_ep_cnt_reg(__O uint16_t * pdwReg, size_t wCount)
-{
-  /* We assume that the buffer size is already aligned to hardware requirements. */
-  uint16_t blocksize = (wCount > 62) ? 1 : 0;
-  uint16_t numblocks = wCount / (blocksize ? 32 : 2);
-
-  /* There should be no remainder in the above calculation */
-  TU_ASSERT((wCount - (numblocks * (blocksize ? 32 : 2))) == 0, /**/);
-
-  /* Encode into register. When BLSIZE==1, we need to subtract 1 block count */
-  *pdwReg = (blocksize << 15) | ((numblocks - blocksize) << 10);
+#endif
 }
 
 /**
@@ -233,57 +274,96 @@ TU_ATTR_ALWAYS_INLINE static inline void pcd_set_ep_address(USB_TypeDef * USBx,
   pcd_set_endpoint(USBx, bEpIdx,regVal);
 }
 
-TU_ATTR_ALWAYS_INLINE static inline __IO uint16_t * pcd_btable_word_ptr(USB_TypeDef * USBx, size_t x)
+TU_ATTR_ALWAYS_INLINE static inline uint32_t pcd_get_ep_tx_address(USB_TypeDef * USBx, uint32_t bEpIdx)
 {
-  size_t total_word_offset = (((USBx)->BTABLE)>>1) + x;
-  total_word_offset *= PMA_STRIDE;
-  return &(pma[total_word_offset]);
+#ifdef PMA_32BIT_ACCESS
+  return pma32[2*bEpIdx] & 0x0000FFFFu ;
+#else
+  return *pcd_btable_word_ptr(USBx,(bEpIdx)*4u + 0u);
+#endif
 }
 
-// Pointers to the PMA table entries (using the ARM address space)
-TU_ATTR_ALWAYS_INLINE static inline __IO uint16_t* pcd_ep_tx_address_ptr(USB_TypeDef * USBx, uint32_t bEpIdx)
+TU_ATTR_ALWAYS_INLINE static inline uint32_t pcd_get_ep_rx_address(USB_TypeDef * USBx, uint32_t bEpIdx)
 {
-  return pcd_btable_word_ptr(USBx,(bEpIdx)*4u + 0u);
-}
-TU_ATTR_ALWAYS_INLINE static inline __IO uint16_t* pcd_ep_tx_cnt_ptr(USB_TypeDef * USBx, uint32_t bEpIdx)
-{
-  return pcd_btable_word_ptr(USBx,(bEpIdx)*4u + 1u);
+#ifdef PMA_32BIT_ACCESS
+  return pma32[2*bEpIdx + 1] & 0x0000FFFFu;
+#else
+  return *pcd_btable_word_ptr(USBx,(bEpIdx)*4u + 2u);
+#endif
 }
 
-TU_ATTR_ALWAYS_INLINE static inline __IO uint16_t* pcd_ep_rx_address_ptr(USB_TypeDef * USBx, uint32_t bEpIdx)
+TU_ATTR_ALWAYS_INLINE static inline void pcd_set_ep_tx_address(USB_TypeDef * USBx, uint32_t bEpIdx, uint32_t addr)
 {
-  return  pcd_btable_word_ptr(USBx,(bEpIdx)*4u + 2u);
+#ifdef PMA_32BIT_ACCESS
+  pma32[2*bEpIdx] = (pma32[2*bEpIdx] & 0xFFFF0000u) | (addr & 0x0000FFFCu);
+#else
+  *pcd_btable_word_ptr(USBx,(bEpIdx)*4u + 0u) = addr;
+#endif
 }
 
-TU_ATTR_ALWAYS_INLINE static inline __IO uint16_t* pcd_ep_rx_cnt_ptr(USB_TypeDef * USBx, uint32_t bEpIdx)
+TU_ATTR_ALWAYS_INLINE static inline void pcd_set_ep_rx_address(USB_TypeDef * USBx, uint32_t bEpIdx, uint32_t addr)
 {
-  return pcd_btable_word_ptr(USBx,(bEpIdx)*4u + 3u);
+#ifdef PMA_32BIT_ACCESS
+  pma32[2*bEpIdx + 1] = (pma32[2*bEpIdx + 1] & 0xFFFF0000u) | (addr & 0x0000FFFCu);
+#else
+  *pcd_btable_word_ptr(USBx,(bEpIdx)*4u + 2u) = addr;
+#endif
 }
 
-TU_ATTR_ALWAYS_INLINE static inline void pcd_set_ep_tx_cnt(USB_TypeDef * USBx,  uint32_t bEpIdx, uint32_t wCount)
+TU_ATTR_ALWAYS_INLINE static inline void pcd_set_ep_tx_cnt(USB_TypeDef * USBx, uint32_t bEpIdx, uint32_t wCount)
 {
+#ifdef PMA_32BIT_ACCESS
+  pma32[2*bEpIdx] = (pma32[2*bEpIdx] & ~0x03FF0000u) | ((wCount & 0x3FFu) << 16);
+#else
   __IO uint16_t * reg = pcd_ep_tx_cnt_ptr(USBx, bEpIdx);
   *reg = (uint16_t) (*reg & (uint16_t) ~0x3FFU) | (wCount & 0x3FFU);
+#endif
 }
 
-TU_ATTR_ALWAYS_INLINE static inline void pcd_set_ep_rx_cnt(USB_TypeDef * USBx,  uint32_t bEpIdx, uint32_t wCount)
+TU_ATTR_ALWAYS_INLINE static inline void pcd_set_ep_rx_cnt(USB_TypeDef * USBx, uint32_t bEpIdx, uint32_t wCount)
 {
+#ifdef PMA_32BIT_ACCESS
+  pma32[2*bEpIdx + 1] = (pma32[2*bEpIdx + 1] & ~0x03FF0000u) | ((wCount & 0x3FFu) << 16);
+#else
   __IO uint16_t * reg = pcd_ep_rx_cnt_ptr(USBx, bEpIdx);
   *reg = (uint16_t) (*reg & (uint16_t) ~0x3FFU) | (wCount & 0x3FFU);
+#endif
 }
 
-TU_ATTR_ALWAYS_INLINE static inline void pcd_set_ep_tx_bufsize(USB_TypeDef * USBx,  uint32_t bEpIdx, uint32_t wCount)
+TU_ATTR_ALWAYS_INLINE static inline void pcd_set_ep_blsize_num_blocks(USB_TypeDef * USBx, uint32_t rxtx_idx, uint32_t blocksize, uint32_t numblocks)
 {
-  __IO uint16_t *pdwReg = pcd_ep_tx_cnt_ptr((USBx),(bEpIdx));
-  wCount = pcd_aligned_buffer_size(wCount);
-  pcd_set_ep_cnt_reg(pdwReg, wCount);
+  /* Encode into register. When BLSIZE==1, we need to subtract 1 block count */
+#ifdef PMA_32BIT_ACCESS
+  pma32[rxtx_idx] = (pma32[rxtx_idx] & 0x0000FFFFu) | (blocksize << 31) | ((numblocks - blocksize) << 26);
+#else
+  __IO uint16_t *pdwReg = pcd_btable_word_ptr(USBx, rxtx_idx*2u + 1u);
+  *pdwReg = (blocksize << 15) | ((numblocks - blocksize) << 10);
+#endif
 }
 
-TU_ATTR_ALWAYS_INLINE static inline void pcd_set_ep_rx_bufsize(USB_TypeDef * USBx,  uint32_t bEpIdx, uint32_t wCount)
+TU_ATTR_ALWAYS_INLINE static inline void pcd_set_ep_bufsize(USB_TypeDef * USBx, uint32_t rxtx_idx, uint32_t wCount)
 {
-  __IO uint16_t *pdwReg = pcd_ep_rx_cnt_ptr((USBx),(bEpIdx));
   wCount = pcd_aligned_buffer_size(wCount);
-  pcd_set_ep_cnt_reg(pdwReg, wCount);
+
+  /* We assume that the buffer size is already aligned to hardware requirements. */
+  uint16_t blocksize = (wCount > 62) ? 1 : 0;
+  uint16_t numblocks = wCount / (blocksize ? 32 : 2);
+
+  /* There should be no remainder in the above calculation */
+  TU_ASSERT((wCount - (numblocks * (blocksize ? 32 : 2))) == 0, /**/);
+
+  /* Encode into register. When BLSIZE==1, we need to subtract 1 block count */
+  pcd_set_ep_blsize_num_blocks(USBx, rxtx_idx, blocksize, numblocks);
+}
+
+TU_ATTR_ALWAYS_INLINE static inline void pcd_set_ep_tx_bufsize(USB_TypeDef * USBx, uint32_t bEpIdx, uint32_t wCount)
+{
+  pcd_set_ep_bufsize(USBx, 2*bEpIdx, wCount);
+}
+
+TU_ATTR_ALWAYS_INLINE static inline void pcd_set_ep_rx_bufsize(USB_TypeDef * USBx, uint32_t bEpIdx, uint32_t wCount)
+{
+  pcd_set_ep_bufsize(USBx, 2*bEpIdx + 1, wCount);
 }
 
 /**

From 8ae4f8f0699351e5bba349ccb0fab65b557afed6 Mon Sep 17 00:00:00 2001
From: Hubert Denkmair <xor@xor.wtf>
Date: Wed, 8 Mar 2023 12:05:58 +0100
Subject: [PATCH 02/16] add basic STM32G0 support

---
 src/common/tusb_mcu.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/common/tusb_mcu.h b/src/common/tusb_mcu.h
index 257d08a85..957df5e9e 100644
--- a/src/common/tusb_mcu.h
+++ b/src/common/tusb_mcu.h
@@ -191,6 +191,11 @@
   #define TUP_USBIP_FSDEV_STM32
   #define TUP_DCD_ENDPOINT_MAX    8
 
+#elif TU_CHECK_MCU(OPT_MCU_STM32G0)
+  #define TUP_USBIP_FSDEV
+  #define TUP_USBIP_FSDEV_STM32
+  #define TUP_DCD_ENDPOINT_MAX    8
+
 #elif TU_CHECK_MCU(OPT_MCU_STM32L0, OPT_MCU_STM32L1)
   #define TUP_USBIP_FSDEV
   #define TUP_USBIP_FSDEV_STM32

From b3ad560e629be18146fd52e32235cc2ed72dc70b Mon Sep 17 00:00:00 2001
From: Hubert Denkmair <xor@xor.wtf>
Date: Wed, 8 Mar 2023 14:22:11 +0100
Subject: [PATCH 03/16] fix path to stm32g0xx.h

---
 src/portable/st/stm32_fsdev/dcd_stm32_fsdev_pvt_st.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/portable/st/stm32_fsdev/dcd_stm32_fsdev_pvt_st.h b/src/portable/st/stm32_fsdev/dcd_stm32_fsdev_pvt_st.h
index 686bfaa66..00791eeb7 100644
--- a/src/portable/st/stm32_fsdev/dcd_stm32_fsdev_pvt_st.h
+++ b/src/portable/st/stm32_fsdev/dcd_stm32_fsdev_pvt_st.h
@@ -83,7 +83,7 @@
   #define PMA_LENGTH (1024u)
 
 #elif CFG_TUSB_MCU == OPT_MCU_STM32G0
-  #include "STM32/stm32g0xx.h"
+  #include "stm32g0xx.h"
   #define PMA_32BIT_ACCESS
   #define PMA_LENGTH (1024u) // FIXME it is 2048, really
   #undef USB_PMAADDR

From af577d2b6dc9523dc348b36e9e753adc00aec974 Mon Sep 17 00:00:00 2001
From: Hubert Denkmair <xor@xor.wtf>
Date: Wed, 8 Mar 2023 14:25:30 +0100
Subject: [PATCH 04/16] add G0 to supported platforms in README.rst :)

---
 README.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.rst b/README.rst
index 7825a1b0a..4f7546482 100644
--- a/README.rst
+++ b/README.rst
@@ -51,7 +51,7 @@ The stack supports the following MCUs:
 - **Renesas:** RX63N, RX65N, RX72N
 - **Silabs:** EFM32GG
 - **Sony:** CXD56
-- **ST:** STM32 series: F0, F1, F2, F3, F4, F7, H7, G4, L0, L1, L4, L4+, WB
+- **ST:** STM32 series: F0, F1, F2, F3, F4, F7, H7, G0, G4, L0, L1, L4, L4+, WB
 - **TI:** MSP430, MSP432E4, TM4C123
 - **ValentyUSB:** eptri
 - **WCH:** CH32V307

From f8a21fff171aa272360c89dab5faca4f688a656a Mon Sep 17 00:00:00 2001
From: Hubert Denkmair <xor@xor.wtf>
Date: Sun, 12 Mar 2023 15:51:07 +0100
Subject: [PATCH 05/16] dcd_write_packet_memory: use volatile modifier for
 destination pointer

---
 src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c b/src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c
index 21ae8e6e8..e2e1cf484 100644
--- a/src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c
+++ b/src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c
@@ -1228,8 +1228,8 @@ void dcd_edpt_clear_stall (uint8_t rhport, uint8_t ep_addr)
 static bool dcd_write_packet_memory(uint16_t dst, const void *__restrict src, size_t wNBytes)
 {
   // FIXME original function uses byte-access to source memory (to support non-aligned buffers)
-  const uint32_t* src32 = (uint32_t*)(src);
-  uint32_t* dst32 = (uint32_t*)(USB_PMAADDR + dst);
+  const uint32_t* src32 = (const uint32_t*)(src);
+  volatile uint32_t* dst32 = (volatile uint32_t*)(USB_PMAADDR + dst);
   for (unsigned n=wNBytes/4; n>0; --n) {
     *dst32++ = *src32++;
   }

From 152a22f3eef3e3c6977a99df1aae26eb3095c9f1 Mon Sep 17 00:00:00 2001
From: HiFiPhile <admin@hifiphile.com>
Date: Fri, 14 Apr 2023 16:05:56 +0200
Subject: [PATCH 06/16] Update lib & template.

---
 tools/get_deps.py       | 4 ++--
 tools/iar_template.ipcf | 6 +++---
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/tools/get_deps.py b/tools/get_deps.py
index 4b81d1468..dfe00b32a 100644
--- a/tools/get_deps.py
+++ b/tools/get_deps.py
@@ -37,7 +37,7 @@ deps_optional = {
     'hw/mcu/st/cmsis_device_f3'                : ['5e4ee5ed7a7b6c85176bb70a9fd3c72d6eb99f1b', 'https://github.com/STMicroelectronics/cmsis_device_f3.git'     ],
     'hw/mcu/st/cmsis_device_f4'                : ['2615e866fa48fe1ff1af9e31c348813f2b19e7ec', 'https://github.com/STMicroelectronics/cmsis_device_f4.git'     ],
     'hw/mcu/st/cmsis_device_f7'                : ['fc676ef1ad177eb874eaa06444d3d75395fc51f4', 'https://github.com/STMicroelectronics/cmsis_device_f7.git'     ],
-    'hw/mcu/st/cmsis_device_g0'                : ['08258b28ee95f50cb9624d152a1cbf084be1f9a5', 'https://github.com/STMicroelectronics/cmsis_device_g0.git'     ],
+    'hw/mcu/st/cmsis_device_g0'                : ['3a23e1224417f3f2d00300ecd620495e363f2094', 'https://github.com/STMicroelectronics/cmsis_device_g0.git'     ],
     'hw/mcu/st/cmsis_device_g4'                : ['ce822adb1dc552b3aedd13621edbc7fdae124878', 'https://github.com/STMicroelectronics/cmsis_device_g4.git'     ],
     'hw/mcu/st/cmsis_device_h7'                : ['60dc2c913203dc8629dc233d4384dcc41c91e77f', 'https://github.com/STMicroelectronics/cmsis_device_h7.git'     ],
     'hw/mcu/st/cmsis_device_l0'                : ['06748ca1f93827befdb8b794402320d94d02004f', 'https://github.com/STMicroelectronics/cmsis_device_l0.git'     ],
@@ -52,7 +52,7 @@ deps_optional = {
     'hw/mcu/st/stm32f3xx_hal_driver'           : ['1761b6207318ede021706e75aae78f452d72b6fa', 'https://github.com/STMicroelectronics/stm32f3xx_hal_driver.git'],
     'hw/mcu/st/stm32f4xx_hal_driver'           : ['04e99fbdabd00ab8f370f377c66b0a4570365b58', 'https://github.com/STMicroelectronics/stm32f4xx_hal_driver.git'],
     'hw/mcu/st/stm32f7xx_hal_driver'           : ['f7ffdf6bf72110e58b42c632b0a051df5997e4ee', 'https://github.com/STMicroelectronics/stm32f7xx_hal_driver.git'],
-    'hw/mcu/st/stm32g0xx_hal_driver'           : ['5b53e6cee664a82b16c86491aa0060e2110c00cb', 'https://github.com/STMicroelectronics/stm32g0xx_hal_driver.git'],
+    'hw/mcu/st/stm32g0xx_hal_driver'           : ['e911b12c7f67084d7f6b76157a4c0d4e2ec3779c', 'https://github.com/STMicroelectronics/stm32g0xx_hal_driver.git'],
     'hw/mcu/st/stm32g4xx_hal_driver'           : ['8b4518417706d42eef5c14e56a650005abf478a8', 'https://github.com/STMicroelectronics/stm32g4xx_hal_driver.git'],
     'hw/mcu/st/stm32h7xx_hal_driver'           : ['d8461b980b59b1625207d8c4f2ce0a9c2a7a3b04', 'https://github.com/STMicroelectronics/stm32h7xx_hal_driver.git'],
     'hw/mcu/st/stm32l0xx_hal_driver'           : ['fbdacaf6f8c82a4e1eb9bd74ba650b491e97e17b', 'https://github.com/STMicroelectronics/stm32l0xx_hal_driver.git'],
diff --git a/tools/iar_template.ipcf b/tools/iar_template.ipcf
index d243aab0a..2d262c414 100644
--- a/tools/iar_template.ipcf
+++ b/tools/iar_template.ipcf
@@ -57,7 +57,6 @@
 		<group name="src/host">
 			<path>$TUSB_DIR$/src/host/hub.c</path>
 			<path>$TUSB_DIR$/src/host/usbh.c</path>
-			<path>$TUSB_DIR$/src/host/usbh_control.c</path>
 		</group>
 		<group name="src/portable/synopsys/dwc2">
 			<path>$TUSB_DIR$/src/portable/synopsys/dwc2/dcd_dwc2.c</path>
@@ -120,8 +119,9 @@
 			<path>$TUSB_DIR$/src/portable/raspberrypi/rp2040/hcd_rp2040.c</path>
 			<path>$TUSB_DIR$/src/portable/raspberrypi/rp2040/rp2040_usb.c</path>
 		</group>
-		<group name="src/portable/renesas/usba">
-			<path>$TUSB_DIR$/src/portable/renesas/usba/dcd_usba.c</path>
+		<group name="src/portable/renesas/rusb2">
+			<path>$TUSB_DIR$/src/portable/renesas/rusb2/dcd_rusb2.c</path>
+            <path>$TUSB_DIR$/src/portable/renesas/rusb2/hcd_rusb2.c</path>
 		</group>
 		<group name="src/portable/sony/cxd56">
 			<path>$TUSB_DIR$/src/portable/sony/cxd56/dcd_cxd56.c</path>

From 0ea23904c4deb8641b90f32b668e2f9cdb96c34e Mon Sep 17 00:00:00 2001
From: HiFiPhile <admin@hifiphile.com>
Date: Fri, 14 Apr 2023 16:07:04 +0200
Subject: [PATCH 07/16] Add stm32g0b1nucleo BSP.

---
 .../stm32g0b1nucleo/STM32G0B1RETx_FLASH.ld    | 189 ++++++++++
 hw/bsp/stm32g0/boards/stm32g0b1nucleo/board.h | 116 ++++++
 .../stm32g0/boards/stm32g0b1nucleo/board.mk   |  13 +
 hw/bsp/stm32g0/family.c                       | 189 ++++++++++
 hw/bsp/stm32g0/family.mk                      |  57 +++
 hw/bsp/stm32g0/stm32g0xx_hal_conf.h           | 351 ++++++++++++++++++
 6 files changed, 915 insertions(+)
 create mode 100644 hw/bsp/stm32g0/boards/stm32g0b1nucleo/STM32G0B1RETx_FLASH.ld
 create mode 100644 hw/bsp/stm32g0/boards/stm32g0b1nucleo/board.h
 create mode 100644 hw/bsp/stm32g0/boards/stm32g0b1nucleo/board.mk
 create mode 100644 hw/bsp/stm32g0/family.c
 create mode 100644 hw/bsp/stm32g0/family.mk
 create mode 100644 hw/bsp/stm32g0/stm32g0xx_hal_conf.h

diff --git a/hw/bsp/stm32g0/boards/stm32g0b1nucleo/STM32G0B1RETx_FLASH.ld b/hw/bsp/stm32g0/boards/stm32g0b1nucleo/STM32G0B1RETx_FLASH.ld
new file mode 100644
index 000000000..842cf1372
--- /dev/null
+++ b/hw/bsp/stm32g0/boards/stm32g0b1nucleo/STM32G0B1RETx_FLASH.ld
@@ -0,0 +1,189 @@
+/*
+******************************************************************************
+**
+
+**  File        : LinkerScript.ld
+**
+**  Author		: STM32CubeMX
+**
+**  Abstract    : Linker script for STM32G0B1RETx series
+**                512Kbytes FLASH and 144Kbytes RAM
+**
+**                Set heap size, stack size and stack location according
+**                to application requirements.
+**
+**                Set memory bank area and size if external memory is used.
+**
+**  Target      : STMicroelectronics STM32
+**
+**  Distribution: The file is distributed “as is,” without any warranty
+**                of any kind.
+**
+*****************************************************************************
+** @attention
+**
+** <h2><center>&copy; COPYRIGHT(c) 2019 STMicroelectronics</center></h2>
+**
+** Redistribution and use in source and binary forms, with or without modification,
+** are permitted provided that the following conditions are met:
+**   1. Redistributions of source code must retain the above copyright notice,
+**      this list of conditions and the following disclaimer.
+**   2. Redistributions in binary form must reproduce the above copyright notice,
+**      this list of conditions and the following disclaimer in the documentation
+**      and/or other materials provided with the distribution.
+**   3. Neither the name of STMicroelectronics nor the names of its contributors
+**      may be used to endorse or promote products derived from this software
+**      without specific prior written permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+** AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+** IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+** DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+** FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+** DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+** SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+** CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+** OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+**
+*****************************************************************************
+*/
+
+/* Entry Point */
+ENTRY(Reset_Handler)
+
+/* Highest address of the user mode stack */
+_estack = ORIGIN(RAM) + LENGTH(RAM);    /* end of RAM */
+/* Generate a link error if heap and stack don't fit into RAM */
+_Min_Heap_Size = 0x200;      /* required amount of heap  */
+_Min_Stack_Size = 0x400; /* required amount of stack */
+
+/* Specify the memory areas */
+MEMORY
+{
+RAM (xrw)      : ORIGIN = 0x20000000, LENGTH = 144K
+FLASH (rx)      : ORIGIN = 0x8000000, LENGTH = 512K
+}
+
+/* Define output sections */
+SECTIONS
+{
+  /* The startup code goes first into FLASH */
+  .isr_vector :
+  {
+    . = ALIGN(4);
+    KEEP(*(.isr_vector)) /* Startup code */
+    . = ALIGN(4);
+  } >FLASH
+
+  /* The program code and other data goes into FLASH */
+  .text :
+  {
+    . = ALIGN(4);
+    *(.text)           /* .text sections (code) */
+    *(.text*)          /* .text* sections (code) */
+    *(.glue_7)         /* glue arm to thumb code */
+    *(.glue_7t)        /* glue thumb to arm code */
+    *(.eh_frame)
+
+    KEEP (*(.init))
+    KEEP (*(.fini))
+
+    . = ALIGN(4);
+    _etext = .;        /* define a global symbols at end of code */
+  } >FLASH
+
+  /* Constant data goes into FLASH */
+  .rodata :
+  {
+    . = ALIGN(4);
+    *(.rodata)         /* .rodata sections (constants, strings, etc.) */
+    *(.rodata*)        /* .rodata* sections (constants, strings, etc.) */
+    . = ALIGN(4);
+  } >FLASH
+
+  .ARM.extab   : { *(.ARM.extab* .gnu.linkonce.armextab.*) } >FLASH
+  .ARM : {
+    __exidx_start = .;
+    *(.ARM.exidx*)
+    __exidx_end = .;
+  } >FLASH
+
+  .preinit_array     :
+  {
+    PROVIDE_HIDDEN (__preinit_array_start = .);
+    KEEP (*(.preinit_array*))
+    PROVIDE_HIDDEN (__preinit_array_end = .);
+  } >FLASH
+  .init_array :
+  {
+    PROVIDE_HIDDEN (__init_array_start = .);
+    KEEP (*(SORT(.init_array.*)))
+    KEEP (*(.init_array*))
+    PROVIDE_HIDDEN (__init_array_end = .);
+  } >FLASH
+  .fini_array :
+  {
+    PROVIDE_HIDDEN (__fini_array_start = .);
+    KEEP (*(SORT(.fini_array.*)))
+    KEEP (*(.fini_array*))
+    PROVIDE_HIDDEN (__fini_array_end = .);
+  } >FLASH
+
+  /* used by the startup to initialize data */
+  _sidata = LOADADDR(.data);
+
+  /* Initialized data sections goes into RAM, load LMA copy after code */
+  .data : 
+  {
+    . = ALIGN(4);
+    _sdata = .;        /* create a global symbol at data start */
+    *(.data)           /* .data sections */
+    *(.data*)          /* .data* sections */
+
+    . = ALIGN(4);
+    _edata = .;        /* define a global symbol at data end */
+  } >RAM AT> FLASH
+
+  
+  /* Uninitialized data section */
+  . = ALIGN(4);
+  .bss :
+  {
+    /* This is used by the startup in order to initialize the .bss secion */
+    _sbss = .;         /* define a global symbol at bss start */
+    __bss_start__ = _sbss;
+    *(.bss)
+    *(.bss*)
+    *(COMMON)
+
+    . = ALIGN(4);
+    _ebss = .;         /* define a global symbol at bss end */
+    __bss_end__ = _ebss;
+  } >RAM
+
+  /* User_heap_stack section, used to check that there is enough RAM left */
+  ._user_heap_stack :
+  {
+    . = ALIGN(8);
+    PROVIDE ( end = . );
+    PROVIDE ( _end = . );
+    . = . + _Min_Heap_Size;
+    . = . + _Min_Stack_Size;
+    . = ALIGN(8);
+  } >RAM
+
+  
+
+  /* Remove information from the standard libraries */
+  /DISCARD/ :
+  {
+    libc.a ( * )
+    libm.a ( * )
+    libgcc.a ( * )
+  }
+
+  .ARM.attributes 0 : { *(.ARM.attributes) }
+}
+
+
diff --git a/hw/bsp/stm32g0/boards/stm32g0b1nucleo/board.h b/hw/bsp/stm32g0/boards/stm32g0b1nucleo/board.h
new file mode 100644
index 000000000..3f5bc60b7
--- /dev/null
+++ b/hw/bsp/stm32g0/boards/stm32g0b1nucleo/board.h
@@ -0,0 +1,116 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020, Ha Thach (tinyusb.org)
+ * Copyright (c) 2034, HiFiPhile
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * This file is part of the TinyUSB stack.
+ */
+
+#ifndef BOARD_H_
+#define BOARD_H_
+
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+// G0B1RE Nucleo does not has usb connection. We need to manually connect
+// - PA12 for D+, CN10.12
+// - PA11 for D-, CN10.14
+
+// LED
+#define LED_PORT              GPIOA
+#define LED_PIN               GPIO_PIN_5
+#define LED_STATE_ON          0
+
+// Button
+#define BUTTON_PORT           GPIOC
+#define BUTTON_PIN            GPIO_PIN_13
+#define BUTTON_STATE_ACTIVE   1
+
+// UART Enable for STLink VCOM
+#define UART_DEV              USART2
+#define UART_CLK_EN           __HAL_RCC_USART2_CLK_ENABLE
+#define UART_GPIO_PORT        GPIOA
+#define UART_GPIO_AF          GPIO_AF1_USART2
+#define UART_TX_PIN           GPIO_PIN_2
+#define UART_RX_PIN           GPIO_PIN_3
+
+
+//--------------------------------------------------------------------+
+// RCC Clock
+//--------------------------------------------------------------------+
+static inline void board_clock_init(void)
+{
+  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
+  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
+  RCC_CRSInitTypeDef pInit = {0};
+
+  /** Tick priority is used in HAL_RCC_OscConfig, so we need to enable it now
+  */
+  HAL_InitTick(0);
+  
+  /** Configure the main internal regulator output voltage
+  */
+  HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1);
+
+  /** Initializes the RCC Oscillators according to the specified parameters
+  * in the RCC_OscInitTypeDef structure.
+  */
+  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI|RCC_OSCILLATORTYPE_HSI48;
+  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
+  RCC_OscInitStruct.HSI48State = RCC_HSI48_ON;
+  RCC_OscInitStruct.HSIDiv = RCC_HSI_DIV1;
+  RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
+  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
+  HAL_RCC_OscConfig(&RCC_OscInitStruct);
+
+  /** Initializes the CPU, AHB and APB buses clocks
+  */
+  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
+                              |RCC_CLOCKTYPE_PCLK1;
+  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;
+  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
+  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
+
+  HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0);
+
+  /** Enable the SYSCFG APB clock
+  */
+  __HAL_RCC_CRS_CLK_ENABLE();
+
+  /** Configures CRS
+  */
+  pInit.Prescaler = RCC_CRS_SYNC_DIV1;
+  pInit.Source = RCC_CRS_SYNC_SOURCE_USB;
+  pInit.Polarity = RCC_CRS_SYNC_POLARITY_RISING;
+  pInit.ReloadValue = __HAL_RCC_CRS_RELOADVALUE_CALCULATE(48000000,1000);
+  pInit.ErrorLimitValue = 34;
+  pInit.HSI48CalibrationValue = 32;
+
+  HAL_RCCEx_CRSConfig(&pInit);
+}
+
+#ifdef __cplusplus
+ }
+#endif
+
+#endif /* BOARD_H_ */
diff --git a/hw/bsp/stm32g0/boards/stm32g0b1nucleo/board.mk b/hw/bsp/stm32g0/boards/stm32g0b1nucleo/board.mk
new file mode 100644
index 000000000..50f282b09
--- /dev/null
+++ b/hw/bsp/stm32g0/boards/stm32g0b1nucleo/board.mk
@@ -0,0 +1,13 @@
+CFLAGS += \
+	-DSTM32G0B1xx
+
+# GCC
+GCC_SRC_S += $(ST_CMSIS)/Source/Templates/gcc/startup_stm32g0b1xx.s
+GCC_LD_FILE = $(BOARD_PATH)/STM32G0B1RETx_FLASH.ld
+
+# IAR
+IAR_SRC_S += $(ST_CMSIS)/Source/Templates/iar/startup_stm32g0b1xx.s
+IAR_LD_FILE = $(ST_CMSIS)/Source/Templates/iar/linker/stm32g0b1xx_flash.icf
+
+# For flash-jlink target
+JLINK_DEVICE = stm32g0b1re
diff --git a/hw/bsp/stm32g0/family.c b/hw/bsp/stm32g0/family.c
new file mode 100644
index 000000000..585398974
--- /dev/null
+++ b/hw/bsp/stm32g0/family.c
@@ -0,0 +1,189 @@
+/* 
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2019 Ha Thach (tinyusb.org)
+ * Copyright (c) 2023 HiFiPhile
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * This file is part of the TinyUSB stack.
+ */
+
+#include "stm32g0xx_hal.h"
+#include "bsp/board.h"
+#include "board.h"
+
+//--------------------------------------------------------------------+
+// Forward USB interrupt events to TinyUSB IRQ Handler
+//--------------------------------------------------------------------+
+void USB_UCPD1_2_IRQHandler(void)
+{
+  tud_int_handler(0);
+}
+
+//--------------------------------------------------------------------+
+// MACRO TYPEDEF CONSTANT ENUM
+//--------------------------------------------------------------------+
+UART_HandleTypeDef UartHandle;
+
+void board_init(void)
+{
+  board_clock_init();
+
+  // Enable All GPIOs clocks
+  __HAL_RCC_GPIOA_CLK_ENABLE();
+  __HAL_RCC_GPIOB_CLK_ENABLE();
+  __HAL_RCC_GPIOC_CLK_ENABLE();
+  __HAL_RCC_GPIOD_CLK_ENABLE();
+  __HAL_RCC_GPIOE_CLK_ENABLE();
+
+  UART_CLK_EN();
+
+#if CFG_TUSB_OS == OPT_OS_NONE
+  // 1ms tick timer
+  SysTick_Config(SystemCoreClock / 1000);
+#elif CFG_TUSB_OS == OPT_OS_FREERTOS
+  // Explicitly disable systick to prevent its ISR runs before scheduler start
+  SysTick->CTRL &= ~1U;
+
+  // If freeRTOS is used, IRQ priority is limit by max syscall ( smaller is higher )
+  NVIC_SetPriority(USB_UCPD1_2_IRQn, configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY);
+#endif
+
+  GPIO_InitTypeDef  GPIO_InitStruct;
+
+  // LED
+  GPIO_InitStruct.Pin = LED_PIN;
+  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
+  GPIO_InitStruct.Pull = GPIO_PULLUP;
+  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
+  HAL_GPIO_Init(LED_PORT, &GPIO_InitStruct);
+
+  board_led_write(false);
+
+  // Button
+  GPIO_InitStruct.Pin = BUTTON_PIN;
+  GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
+  GPIO_InitStruct.Pull = BUTTON_STATE_ACTIVE ? GPIO_PULLDOWN : GPIO_PULLUP;
+  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
+  HAL_GPIO_Init(BUTTON_PORT, &GPIO_InitStruct);
+
+#ifdef UART_DEV
+  // UART
+  GPIO_InitStruct.Pin       = UART_TX_PIN | UART_RX_PIN;
+  GPIO_InitStruct.Mode      = GPIO_MODE_AF_PP;
+  GPIO_InitStruct.Pull      = GPIO_PULLUP;
+  GPIO_InitStruct.Speed     = GPIO_SPEED_FREQ_HIGH;
+  GPIO_InitStruct.Alternate = UART_GPIO_AF;
+  HAL_GPIO_Init(UART_GPIO_PORT, &GPIO_InitStruct);
+
+  UartHandle = (UART_HandleTypeDef){
+    .Instance        = UART_DEV,
+    .Init.BaudRate   = CFG_BOARD_UART_BAUDRATE,
+    .Init.WordLength = UART_WORDLENGTH_8B,
+    .Init.StopBits   = UART_STOPBITS_1,
+    .Init.Parity     = UART_PARITY_NONE,
+    .Init.HwFlowCtl  = UART_HWCONTROL_NONE,
+    .Init.Mode       = UART_MODE_TX_RX,
+    .Init.OverSampling = UART_OVERSAMPLING_16,
+    .AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT
+  };
+  HAL_UART_Init(&UartHandle);
+#endif
+
+  // USB Pins TODO double check USB clock and pin setup
+  // Configure USB DM and DP pins. This is optional, and maintained only for user guidance.
+  GPIO_InitStruct.Pin = (GPIO_PIN_11 | GPIO_PIN_12);
+  GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
+  GPIO_InitStruct.Pull = GPIO_NOPULL;
+  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
+  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
+
+  /* Peripheral clock enable */
+  __HAL_RCC_USB_CLK_ENABLE();
+
+  /* Enable VDDUSB */
+  if(__HAL_RCC_PWR_IS_CLK_DISABLED())
+  {
+    __HAL_RCC_PWR_CLK_ENABLE();
+    HAL_PWREx_EnableVddUSB();
+    __HAL_RCC_PWR_CLK_DISABLE();
+  }
+  else
+  {
+    HAL_PWREx_EnableVddUSB();
+  }
+}
+
+//--------------------------------------------------------------------+
+// Board porting API
+//--------------------------------------------------------------------+
+
+void board_led_write(bool state)
+{
+  GPIO_PinState pin_state = (GPIO_PinState) (state ? LED_STATE_ON : (1-LED_STATE_ON));
+  HAL_GPIO_WritePin(LED_PORT, LED_PIN, pin_state);
+}
+
+uint32_t board_button_read(void)
+{
+  return BUTTON_STATE_ACTIVE == HAL_GPIO_ReadPin(BUTTON_PORT, BUTTON_PIN);
+}
+
+int board_uart_read(uint8_t* buf, int len)
+{
+  (void) buf; (void) len;
+  return 0;
+}
+
+int board_uart_write(void const * buf, int len)
+{
+#ifdef UART_DEV
+  HAL_UART_Transmit(&UartHandle, (uint8_t*)(uintptr_t) buf, len, 0xffff);
+  return len;
+#else
+  (void) buf; (void) len; (void) UartHandle;
+  return 0;
+#endif
+}
+
+#if CFG_TUSB_OS  == OPT_OS_NONE
+volatile uint32_t system_ticks = 0;
+void SysTick_Handler (void)
+{
+  system_ticks++;
+}
+
+uint32_t board_millis(void)
+{
+  return system_ticks;
+}
+#endif
+
+void HardFault_Handler (void)
+{
+  __asm("BKPT #0\n");
+}
+
+// Required by __libc_init_array in startup code if we are compiling using
+// -nostdlib/-nostartfiles.
+void _init(void)
+{
+
+}
diff --git a/hw/bsp/stm32g0/family.mk b/hw/bsp/stm32g0/family.mk
new file mode 100644
index 000000000..ac0eee156
--- /dev/null
+++ b/hw/bsp/stm32g0/family.mk
@@ -0,0 +1,57 @@
+ST_FAMILY = g0
+DEPS_SUBMODULES += lib/CMSIS_5 hw/mcu/st/cmsis_device_$(ST_FAMILY) hw/mcu/st/stm32$(ST_FAMILY)xx_hal_driver
+
+ST_CMSIS = hw/mcu/st/cmsis_device_$(ST_FAMILY)
+ST_HAL_DRIVER = hw/mcu/st/stm32$(ST_FAMILY)xx_hal_driver
+
+include $(TOP)/$(BOARD_PATH)/board.mk
+
+# --------------
+# Compiler Flags
+# --------------
+CFLAGS += \
+  -DCFG_TUSB_MCU=OPT_MCU_STM32G0
+  
+# GCC Flags
+GCC_CFLAGS += \
+  -flto \
+  -mthumb \
+  -mabi=aapcs \
+  -mcpu=cortex-m0plus \
+  -mfloat-abi=soft \
+  -nostdlib -nostartfiles
+
+# suppress warning caused by vendor mcu driver
+GCC_CFLAGS += -Wno-error=cast-align
+
+# IAR Flags
+IAR_CFLAGS += --cpu cortex-m0
+IAR_ASFLAGS += --cpu cortex-m0
+
+# -----------------
+# Sources & Include
+# -----------------
+
+SRC_C += \
+	src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c \
+	$(ST_CMSIS)/Source/Templates/system_stm32$(ST_FAMILY)xx.c \
+	$(ST_HAL_DRIVER)/Src/stm32$(ST_FAMILY)xx_hal.c \
+	$(ST_HAL_DRIVER)/Src/stm32$(ST_FAMILY)xx_hal_cortex.c \
+	$(ST_HAL_DRIVER)/Src/stm32$(ST_FAMILY)xx_hal_pwr_ex.c \
+	$(ST_HAL_DRIVER)/Src/stm32$(ST_FAMILY)xx_hal_rcc.c \
+	$(ST_HAL_DRIVER)/Src/stm32$(ST_FAMILY)xx_hal_rcc_ex.c \
+	$(ST_HAL_DRIVER)/Src/stm32$(ST_FAMILY)xx_hal_uart.c \
+	$(ST_HAL_DRIVER)/Src/stm32$(ST_FAMILY)xx_hal_uart_ex.c \
+	$(ST_HAL_DRIVER)/Src/stm32$(ST_FAMILY)xx_hal_gpio.c
+
+INC += \
+	$(TOP)/$(BOARD_PATH) \
+	$(TOP)/lib/CMSIS_5/CMSIS/Core/Include \
+	$(TOP)/$(ST_CMSIS)/Include \
+	$(TOP)/$(ST_HAL_DRIVER)/Inc
+
+# For freeRTOS port source
+FREERTOS_PORT = ARM_CM0
+
+# flash target using on-board stlink
+flash: flash-stlink
diff --git a/hw/bsp/stm32g0/stm32g0xx_hal_conf.h b/hw/bsp/stm32g0/stm32g0xx_hal_conf.h
new file mode 100644
index 000000000..b2e335676
--- /dev/null
+++ b/hw/bsp/stm32g0/stm32g0xx_hal_conf.h
@@ -0,0 +1,351 @@
+/* USER CODE BEGIN Header */
+/**
+  ******************************************************************************
+  * @file    stm32g0xx_hal_conf.h
+  * @author  MCD Application Team
+  * @brief   HAL configuration file.
+  ******************************************************************************
+  * @attention
+  *
+  * Copyright (c) 2018-2021 STMicroelectronics.
+  * All rights reserved.
+  *
+  * This software is licensed under terms that can be found in the LICENSE file
+  * in the root directory of this software component.
+  * If no LICENSE file comes with this software, it is provided AS-IS.
+  *
+  ******************************************************************************
+  */
+/* USER CODE END Header */
+
+/* Define to prevent recursive inclusion -------------------------------------*/
+#ifndef STM32G0xx_HAL_CONF_H
+#define STM32G0xx_HAL_CONF_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Exported types ------------------------------------------------------------*/
+/* Exported constants --------------------------------------------------------*/
+
+/* ########################## Module Selection ############################## */
+/**
+  * @brief This is the list of modules to be used in the HAL driver
+  */
+#define HAL_MODULE_ENABLED
+/* #define HAL_ADC_MODULE_ENABLED   */
+/* #define HAL_CEC_MODULE_ENABLED   */
+/* #define HAL_COMP_MODULE_ENABLED   */
+/* #define HAL_CRC_MODULE_ENABLED   */
+/* #define HAL_CRYP_MODULE_ENABLED   */
+/* #define HAL_DAC_MODULE_ENABLED   */
+/* #define HAL_EXTI_MODULE_ENABLED   */
+/* #define HAL_FDCAN_MODULE_ENABLED   */
+/* #define HAL_HCD_MODULE_ENABLED   */
+/* #define HAL_I2C_MODULE_ENABLED   */
+/* #define HAL_I2S_MODULE_ENABLED   */
+/* #define HAL_IWDG_MODULE_ENABLED   */
+/* #define HAL_IRDA_MODULE_ENABLED   */
+/* #define HAL_LPTIM_MODULE_ENABLED   */
+/* #define HAL_PCD_MODULE_ENABLED   */
+/* #define HAL_RNG_MODULE_ENABLED   */
+/* #define HAL_RTC_MODULE_ENABLED   */
+/* #define HAL_SMARTCARD_MODULE_ENABLED   */
+/* #define HAL_SMBUS_MODULE_ENABLED   */
+/* #define HAL_SPI_MODULE_ENABLED   */
+/* #define HAL_TIM_MODULE_ENABLED   */
+/* #define HAL_USART_MODULE_ENABLED   */
+/* #define HAL_WWDG_MODULE_ENABLED   */
+#define HAL_GPIO_MODULE_ENABLED
+#define HAL_EXTI_MODULE_ENABLED
+#define HAL_DMA_MODULE_ENABLED
+#define HAL_RCC_MODULE_ENABLED
+#define HAL_FLASH_MODULE_ENABLED
+#define HAL_PWR_MODULE_ENABLED
+#define HAL_CORTEX_MODULE_ENABLED
+#define HAL_UART_MODULE_ENABLED
+
+/* ########################## Register Callbacks selection ############################## */
+/**
+  * @brief This is the list of modules where register callback can be used
+  */
+#define USE_HAL_ADC_REGISTER_CALLBACKS    0u
+#define USE_HAL_CEC_REGISTER_CALLBACKS    0u
+#define USE_HAL_COMP_REGISTER_CALLBACKS   0u
+#define USE_HAL_CRYP_REGISTER_CALLBACKS   0u
+#define USE_HAL_DAC_REGISTER_CALLBACKS    0u
+#define USE_HAL_FDCAN_REGISTER_CALLBACKS  0u
+#define USE_HAL_HCD_REGISTER_CALLBACKS    0u
+#define USE_HAL_I2C_REGISTER_CALLBACKS    0u
+#define USE_HAL_I2S_REGISTER_CALLBACKS    0u
+#define USE_HAL_IRDA_REGISTER_CALLBACKS   0u
+#define USE_HAL_LPTIM_REGISTER_CALLBACKS  0u
+#define USE_HAL_PCD_REGISTER_CALLBACKS    0u
+#define USE_HAL_RNG_REGISTER_CALLBACKS    0u
+#define USE_HAL_RTC_REGISTER_CALLBACKS    0u
+#define USE_HAL_SMBUS_REGISTER_CALLBACKS  0u
+#define USE_HAL_SPI_REGISTER_CALLBACKS    0u
+#define USE_HAL_TIM_REGISTER_CALLBACKS    0u
+#define USE_HAL_UART_REGISTER_CALLBACKS   0u
+#define USE_HAL_USART_REGISTER_CALLBACKS  0u
+#define USE_HAL_WWDG_REGISTER_CALLBACKS   0u
+
+/* ########################## Oscillator Values adaptation ####################*/
+/**
+  * @brief Adjust the value of External High Speed oscillator (HSE) used in your application.
+  *        This value is used by the RCC HAL module to compute the system frequency
+  *        (when HSE is used as system clock source, directly or through the PLL).
+  */
+#if !defined  (HSE_VALUE)
+#define HSE_VALUE    (8000000UL)         /*!< Value of the External oscillator in Hz */
+#endif /* HSE_VALUE */
+
+#if !defined  (HSE_STARTUP_TIMEOUT)
+#define HSE_STARTUP_TIMEOUT    (100UL)         /*!< Time out for HSE start up, in ms */
+#endif /* HSE_STARTUP_TIMEOUT */
+
+/**
+  * @brief Internal High Speed oscillator (HSI) value.
+  *        This value is used by the RCC HAL module to compute the system frequency
+  *        (when HSI is used as system clock source, directly or through the PLL).
+  */
+#if !defined  (HSI_VALUE)
+#define HSI_VALUE    (16000000UL)            /*!< Value of the Internal oscillator in Hz*/
+#endif /* HSI_VALUE */
+
+#if defined(STM32G0C1xx) || defined(STM32G0B1xx) || defined(STM32G0B0xx)
+/**
+  * @brief Internal High Speed oscillator (HSI48) value for USB FS, SDMMC and RNG.
+  *        This internal oscillator is mainly dedicated to provide a high precision clock to
+  *        the USB peripheral by means of a special Clock Recovery System (CRS) circuitry.
+  *        When the CRS is not used, the HSI48 RC oscillator runs on it default frequency
+  *        which is subject to manufacturing process variations.
+  */
+#if !defined  (HSI48_VALUE)
+  #define HSI48_VALUE   48000000U             /*!< Value of the Internal High Speed oscillator for USB FS/SDMMC/RNG in Hz.
+                                               The real value my vary depending on manufacturing process variations.*/
+#endif /* HSI48_VALUE */
+#endif
+
+/**
+  * @brief Internal Low Speed oscillator (LSI) value.
+  */
+#if !defined  (LSI_VALUE)
+#define LSI_VALUE  (32000UL)                /*!< LSI Typical Value in Hz*/
+#endif /* LSI_VALUE */                      /*!< Value of the Internal Low Speed oscillator in Hz
+The real value may vary depending on the variations
+in voltage and temperature.*/
+/**
+  * @brief External Low Speed oscillator (LSE) value.
+  *        This value is used by the UART, RTC HAL module to compute the system frequency
+  */
+#if !defined  (LSE_VALUE)
+#define LSE_VALUE    (32768UL)               /*!< Value of the External oscillator in Hz*/
+#endif /* LSE_VALUE */
+
+#if !defined  (LSE_STARTUP_TIMEOUT)
+#define LSE_STARTUP_TIMEOUT    (5000UL)      /*!< Time out for LSE start up, in ms */
+#endif /* LSE_STARTUP_TIMEOUT */
+
+/**
+  * @brief External clock source for I2S1 peripheral
+  *        This value is used by the RCC HAL module to compute the I2S1 clock source
+  *        frequency.
+  */
+#if !defined  (EXTERNAL_I2S1_CLOCK_VALUE)
+#define EXTERNAL_I2S1_CLOCK_VALUE    (48000UL) /*!< Value of the I2S1 External clock source in Hz*/
+#endif /* EXTERNAL_I2S1_CLOCK_VALUE */
+
+#if defined(STM32G0C1xx) || defined(STM32G0B1xx) || defined(STM32G0B0xx)
+/**
+  * @brief External clock source for I2S2 peripheral
+  *        This value is used by the RCC HAL module to compute the I2S2 clock source
+  *        frequency.
+  */
+#if !defined  (EXTERNAL_I2S2_CLOCK_VALUE)
+  #define EXTERNAL_I2S2_CLOCK_VALUE    48000U /*!< Value of the I2S2 External clock source in Hz*/
+#endif /* EXTERNAL_I2S2_CLOCK_VALUE */
+#endif
+
+/* Tip: To avoid modifying this file each time you need to use different HSE,
+   ===  you can define the HSE value in your toolchain compiler preprocessor. */
+
+/* ########################### System Configuration ######################### */
+/**
+  * @brief This is the HAL system configuration section
+  */
+#define  VDD_VALUE                    (3300UL)                                        /*!< Value of VDD in mv */
+#define  TICK_INT_PRIORITY            0U /*!< tick interrupt priority */
+#define  USE_RTOS                     0U
+#define  PREFETCH_ENABLE              1U
+#define  INSTRUCTION_CACHE_ENABLE     1U
+
+/* ################## SPI peripheral configuration ########################## */
+
+/* CRC FEATURE: Use to activate CRC feature inside HAL SPI Driver
+* Activated: CRC code is present inside driver
+* Deactivated: CRC code cleaned from driver
+*/
+
+#define USE_SPI_CRC                     0U
+
+/* ################## CRYP peripheral configuration ########################## */
+
+#define USE_HAL_CRYP_SUSPEND_RESUME     1U
+
+/* ########################## Assert Selection ############################## */
+/**
+  * @brief Uncomment the line below to expanse the "assert_param" macro in the
+  *        HAL drivers code
+  */
+/* #define USE_FULL_ASSERT    1U */
+
+/* Includes ------------------------------------------------------------------*/
+/**
+  * @brief Include modules header file
+  */
+
+#ifdef HAL_RCC_MODULE_ENABLED
+#include "stm32g0xx_hal_rcc.h"
+#endif /* HAL_RCC_MODULE_ENABLED */
+
+#ifdef HAL_GPIO_MODULE_ENABLED
+#include "stm32g0xx_hal_gpio.h"
+#endif /* HAL_GPIO_MODULE_ENABLED */
+
+#ifdef HAL_DMA_MODULE_ENABLED
+#include "stm32g0xx_hal_dma.h"
+#endif /* HAL_DMA_MODULE_ENABLED */
+
+#ifdef HAL_CORTEX_MODULE_ENABLED
+#include "stm32g0xx_hal_cortex.h"
+#endif /* HAL_CORTEX_MODULE_ENABLED */
+
+#ifdef HAL_ADC_MODULE_ENABLED
+#include "stm32g0xx_hal_adc.h"
+#include "stm32g0xx_hal_adc_ex.h"
+#endif /* HAL_ADC_MODULE_ENABLED */
+
+#ifdef HAL_CEC_MODULE_ENABLED
+#include "stm32g0xx_hal_cec.h"
+#endif /* HAL_CEC_MODULE_ENABLED */
+
+#ifdef HAL_COMP_MODULE_ENABLED
+#include "stm32g0xx_hal_comp.h"
+#endif /* HAL_COMP_MODULE_ENABLED */
+
+#ifdef HAL_CRC_MODULE_ENABLED
+#include "stm32g0xx_hal_crc.h"
+#endif /* HAL_CRC_MODULE_ENABLED */
+
+#ifdef HAL_CRYP_MODULE_ENABLED
+#include "stm32g0xx_hal_cryp.h"
+#endif /* HAL_CRYP_MODULE_ENABLED */
+
+#ifdef HAL_DAC_MODULE_ENABLED
+#include "stm32g0xx_hal_dac.h"
+#endif /* HAL_DAC_MODULE_ENABLED */
+
+#ifdef HAL_EXTI_MODULE_ENABLED
+#include "stm32g0xx_hal_exti.h"
+#endif /* HAL_EXTI_MODULE_ENABLED */
+
+#ifdef HAL_FLASH_MODULE_ENABLED
+#include "stm32g0xx_hal_flash.h"
+#endif /* HAL_FLASH_MODULE_ENABLED */
+
+#ifdef HAL_FDCAN_MODULE_ENABLED
+#include "stm32g0xx_hal_fdcan.h"
+#endif /* HAL_FDCAN_MODULE_ENABLED */
+
+#ifdef HAL_HCD_MODULE_ENABLED
+#include "stm32g0xx_hal_hcd.h"
+#endif /* HAL_HCD_MODULE_ENABLED */
+
+#ifdef HAL_I2C_MODULE_ENABLED
+#include "stm32g0xx_hal_i2c.h"
+#endif /* HAL_I2C_MODULE_ENABLED */
+
+#ifdef HAL_I2S_MODULE_ENABLED
+#include "stm32g0xx_hal_i2s.h"
+#endif /* HAL_I2S_MODULE_ENABLED */
+
+#ifdef HAL_IRDA_MODULE_ENABLED
+#include "stm32g0xx_hal_irda.h"
+#endif /* HAL_IRDA_MODULE_ENABLED */
+
+#ifdef HAL_IWDG_MODULE_ENABLED
+#include "stm32g0xx_hal_iwdg.h"
+#endif /* HAL_IWDG_MODULE_ENABLED */
+
+#ifdef HAL_LPTIM_MODULE_ENABLED
+#include "stm32g0xx_hal_lptim.h"
+#endif /* HAL_LPTIM_MODULE_ENABLED */
+
+#ifdef HAL_PCD_MODULE_ENABLED
+#include "stm32g0xx_hal_pcd.h"
+#endif /* HAL_PCD_MODULE_ENABLED */
+
+#ifdef HAL_PWR_MODULE_ENABLED
+#include "stm32g0xx_hal_pwr.h"
+#endif /* HAL_PWR_MODULE_ENABLED */
+
+#ifdef HAL_RNG_MODULE_ENABLED
+#include "stm32g0xx_hal_rng.h"
+#endif /* HAL_RNG_MODULE_ENABLED */
+
+#ifdef HAL_RTC_MODULE_ENABLED
+#include "stm32g0xx_hal_rtc.h"
+#endif /* HAL_RTC_MODULE_ENABLED */
+
+#ifdef HAL_SMARTCARD_MODULE_ENABLED
+#include "stm32g0xx_hal_smartcard.h"
+#endif /* HAL_SMARTCARD_MODULE_ENABLED */
+
+#ifdef HAL_SMBUS_MODULE_ENABLED
+#include "stm32g0xx_hal_smbus.h"
+#endif /* HAL_SMBUS_MODULE_ENABLED */
+
+#ifdef HAL_SPI_MODULE_ENABLED
+#include "stm32g0xx_hal_spi.h"
+#endif /* HAL_SPI_MODULE_ENABLED */
+
+#ifdef HAL_TIM_MODULE_ENABLED
+#include "stm32g0xx_hal_tim.h"
+#endif /* HAL_TIM_MODULE_ENABLED */
+
+#ifdef HAL_UART_MODULE_ENABLED
+#include "stm32g0xx_hal_uart.h"
+#endif /* HAL_UART_MODULE_ENABLED */
+
+#ifdef HAL_USART_MODULE_ENABLED
+#include "stm32g0xx_hal_usart.h"
+#endif /* HAL_USART_MODULE_ENABLED */
+
+#ifdef HAL_WWDG_MODULE_ENABLED
+#include "stm32g0xx_hal_wwdg.h"
+#endif /* HAL_WWDG_MODULE_ENABLED */
+
+/* Exported macro ------------------------------------------------------------*/
+#ifdef  USE_FULL_ASSERT
+/**
+  * @brief  The assert_param macro is used for functions parameters check.
+  * @param  expr If expr is false, it calls assert_failed function
+  *         which reports the name of the source file and the source
+  *         line number of the call that failed.
+  *         If expr is true, it returns no value.
+  * @retval None
+  */
+#define assert_param(expr) ((expr) ? (void)0U : assert_failed((uint8_t *)__FILE__, __LINE__))
+/* Exported functions ------------------------------------------------------- */
+void assert_failed(uint8_t *file, uint32_t line);
+#else
+#define assert_param(expr) ((void)0U)
+#endif /* USE_FULL_ASSERT */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* STM32G0xx_HAL_CONF_H */

From 413b0a7da5b9ef1e519e4087a577bfc6d6681d97 Mon Sep 17 00:00:00 2001
From: HiFiPhile <admin@hifiphile.com>
Date: Fri, 14 Apr 2023 17:12:47 +0200
Subject: [PATCH 08/16] Use PLL clock.

---
 hw/bsp/stm32g0/boards/stm32g0b1nucleo/board.h | 38 ++++++++-----------
 hw/bsp/stm32g0/family.c                       | 14 ++-----
 src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c |  1 +
 3 files changed, 21 insertions(+), 32 deletions(-)

diff --git a/hw/bsp/stm32g0/boards/stm32g0b1nucleo/board.h b/hw/bsp/stm32g0/boards/stm32g0b1nucleo/board.h
index 3f5bc60b7..60357d1e8 100644
--- a/hw/bsp/stm32g0/boards/stm32g0b1nucleo/board.h
+++ b/hw/bsp/stm32g0/boards/stm32g0b1nucleo/board.h
@@ -62,7 +62,7 @@ static inline void board_clock_init(void)
 {
   RCC_OscInitTypeDef RCC_OscInitStruct = {0};
   RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
-  RCC_CRSInitTypeDef pInit = {0};
+  RCC_PeriphCLKInitTypeDef  PeriphClkInitStruct = { 0 };
 
   /** Tick priority is used in HAL_RCC_OscConfig, so we need to enable it now
   */
@@ -75,38 +75,32 @@ static inline void board_clock_init(void)
   /** Initializes the RCC Oscillators according to the specified parameters
   * in the RCC_OscInitTypeDef structure.
   */
-  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI|RCC_OSCILLATORTYPE_HSI48;
-  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
-  RCC_OscInitStruct.HSI48State = RCC_HSI48_ON;
-  RCC_OscInitStruct.HSIDiv = RCC_HSI_DIV1;
-  RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
-  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
+  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
+  RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS;
+  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
+  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
+  RCC_OscInitStruct.PLL.PLLM = RCC_PLLM_DIV1;
+  RCC_OscInitStruct.PLL.PLLN = 12;
+  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
+  RCC_OscInitStruct.PLL.PLLQ = RCC_PLLQ_DIV2;
+  RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2;
   HAL_RCC_OscConfig(&RCC_OscInitStruct);
 
+  /* Select HSI48 as USB clock source */
+  PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_USB;
+  PeriphClkInitStruct.UsbClockSelection = RCC_USBCLKSOURCE_PLL;
+  HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct);
+
   /** Initializes the CPU, AHB and APB buses clocks
   */
   RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                               |RCC_CLOCKTYPE_PCLK1;
-  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;
+  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
   RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
   RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
 
   HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0);
 
-  /** Enable the SYSCFG APB clock
-  */
-  __HAL_RCC_CRS_CLK_ENABLE();
-
-  /** Configures CRS
-  */
-  pInit.Prescaler = RCC_CRS_SYNC_DIV1;
-  pInit.Source = RCC_CRS_SYNC_SOURCE_USB;
-  pInit.Polarity = RCC_CRS_SYNC_POLARITY_RISING;
-  pInit.ReloadValue = __HAL_RCC_CRS_RELOADVALUE_CALCULATE(48000000,1000);
-  pInit.ErrorLimitValue = 34;
-  pInit.HSI48CalibrationValue = 32;
-
-  HAL_RCCEx_CRSConfig(&pInit);
 }
 
 #ifdef __cplusplus
diff --git a/hw/bsp/stm32g0/family.c b/hw/bsp/stm32g0/family.c
index 585398974..be356efe9 100644
--- a/hw/bsp/stm32g0/family.c
+++ b/hw/bsp/stm32g0/family.c
@@ -53,6 +53,9 @@ void board_init(void)
   __HAL_RCC_GPIOD_CLK_ENABLE();
   __HAL_RCC_GPIOE_CLK_ENABLE();
 
+  __HAL_RCC_SYSCFG_CLK_ENABLE();
+  __HAL_RCC_PWR_CLK_ENABLE();
+
   UART_CLK_EN();
 
 #if CFG_TUSB_OS == OPT_OS_NONE
@@ -119,16 +122,7 @@ void board_init(void)
   __HAL_RCC_USB_CLK_ENABLE();
 
   /* Enable VDDUSB */
-  if(__HAL_RCC_PWR_IS_CLK_DISABLED())
-  {
-    __HAL_RCC_PWR_CLK_ENABLE();
-    HAL_PWREx_EnableVddUSB();
-    __HAL_RCC_PWR_CLK_DISABLE();
-  }
-  else
-  {
-    HAL_PWREx_EnableVddUSB();
-  }
+  HAL_PWREx_EnableVddUSB();
 }
 
 //--------------------------------------------------------------------+
diff --git a/src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c b/src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c
index 36b9133be..23b328b49 100644
--- a/src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c
+++ b/src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c
@@ -44,6 +44,7 @@
  * L0x2, L0x3                     1024 byte buffer
  * L1                              512 byte buffer
  * L4x2, L4x3                     1024 byte buffer
+ * G0                             2048 byte buffer
  *
  * To use this driver, you must:
  * - If you are using a device with crystal-less USB, set up the clock recovery system (CRS)

From 71d2ccd78f643886237944729f4bd03876dd108f Mon Sep 17 00:00:00 2001
From: HiFiPhile <admin@hifiphile.com>
Date: Fri, 14 Apr 2023 17:22:25 +0200
Subject: [PATCH 09/16] Fix CI

---
 .../boards/stm32g0b1nucleo/STM32G0B1RETx_FLASH.ld      | 10 ++++------
 hw/bsp/stm32g0/boards/stm32g0b1nucleo/board.h          |  2 +-
 hw/bsp/stm32g0/family.c                                |  2 +-
 hw/bsp/stm32g0/family.mk                               |  2 +-
 4 files changed, 7 insertions(+), 9 deletions(-)

diff --git a/hw/bsp/stm32g0/boards/stm32g0b1nucleo/STM32G0B1RETx_FLASH.ld b/hw/bsp/stm32g0/boards/stm32g0b1nucleo/STM32G0B1RETx_FLASH.ld
index 842cf1372..0f3fed096 100644
--- a/hw/bsp/stm32g0/boards/stm32g0b1nucleo/STM32G0B1RETx_FLASH.ld
+++ b/hw/bsp/stm32g0/boards/stm32g0b1nucleo/STM32G0B1RETx_FLASH.ld
@@ -134,7 +134,7 @@ SECTIONS
   _sidata = LOADADDR(.data);
 
   /* Initialized data sections goes into RAM, load LMA copy after code */
-  .data : 
+  .data :
   {
     . = ALIGN(4);
     _sdata = .;        /* create a global symbol at data start */
@@ -145,12 +145,12 @@ SECTIONS
     _edata = .;        /* define a global symbol at data end */
   } >RAM AT> FLASH
 
-  
+
   /* Uninitialized data section */
   . = ALIGN(4);
   .bss :
   {
-    /* This is used by the startup in order to initialize the .bss secion */
+    /* This is used by the startup in order to initialize the .bss section */
     _sbss = .;         /* define a global symbol at bss start */
     __bss_start__ = _sbss;
     *(.bss)
@@ -173,7 +173,7 @@ SECTIONS
     . = ALIGN(8);
   } >RAM
 
-  
+
 
   /* Remove information from the standard libraries */
   /DISCARD/ :
@@ -185,5 +185,3 @@ SECTIONS
 
   .ARM.attributes 0 : { *(.ARM.attributes) }
 }
-
-
diff --git a/hw/bsp/stm32g0/boards/stm32g0b1nucleo/board.h b/hw/bsp/stm32g0/boards/stm32g0b1nucleo/board.h
index 60357d1e8..0d651ea4e 100644
--- a/hw/bsp/stm32g0/boards/stm32g0b1nucleo/board.h
+++ b/hw/bsp/stm32g0/boards/stm32g0b1nucleo/board.h
@@ -67,7 +67,7 @@ static inline void board_clock_init(void)
   /** Tick priority is used in HAL_RCC_OscConfig, so we need to enable it now
   */
   HAL_InitTick(0);
-  
+
   /** Configure the main internal regulator output voltage
   */
   HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1);
diff --git a/hw/bsp/stm32g0/family.c b/hw/bsp/stm32g0/family.c
index be356efe9..10023b7e2 100644
--- a/hw/bsp/stm32g0/family.c
+++ b/hw/bsp/stm32g0/family.c
@@ -1,4 +1,4 @@
-/* 
+/*
  * The MIT License (MIT)
  *
  * Copyright (c) 2019 Ha Thach (tinyusb.org)
diff --git a/hw/bsp/stm32g0/family.mk b/hw/bsp/stm32g0/family.mk
index ac0eee156..faf92dca9 100644
--- a/hw/bsp/stm32g0/family.mk
+++ b/hw/bsp/stm32g0/family.mk
@@ -11,7 +11,7 @@ include $(TOP)/$(BOARD_PATH)/board.mk
 # --------------
 CFLAGS += \
   -DCFG_TUSB_MCU=OPT_MCU_STM32G0
-  
+
 # GCC Flags
 GCC_CFLAGS += \
   -flto \

From 2f2c8ce9ec4a567603cbd5e0420fc3dcaffbdfb6 Mon Sep 17 00:00:00 2001
From: HiFiPhile <admin@hifiphile.com>
Date: Fri, 14 Apr 2023 17:54:25 +0200
Subject: [PATCH 10/16] Fix GCC build.

---
 hw/bsp/board_mcu.h                                   |  3 +++
 hw/bsp/stm32g0/family.mk                             |  2 +-
 src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c        | 12 ++++++++++--
 src/portable/st/stm32_fsdev/dcd_stm32_fsdev_pvt_st.h | 11 +++++++++++
 4 files changed, 25 insertions(+), 3 deletions(-)

diff --git a/hw/bsp/board_mcu.h b/hw/bsp/board_mcu.h
index cd195a19b..6d40aa0d1 100644
--- a/hw/bsp/board_mcu.h
+++ b/hw/bsp/board_mcu.h
@@ -101,6 +101,9 @@
 #elif CFG_TUSB_MCU == OPT_MCU_STM32U5
   #include "stm32u5xx.h"
 
+#elif CFG_TUSB_MCU == OPT_MCU_STM32G0
+  #include "stm32g0xx.h"
+
 #elif CFG_TUSB_MCU == OPT_MCU_CXD56
   // no header needed
 
diff --git a/hw/bsp/stm32g0/family.mk b/hw/bsp/stm32g0/family.mk
index faf92dca9..76f59fc34 100644
--- a/hw/bsp/stm32g0/family.mk
+++ b/hw/bsp/stm32g0/family.mk
@@ -51,7 +51,7 @@ INC += \
 	$(TOP)/$(ST_HAL_DRIVER)/Inc
 
 # For freeRTOS port source
-FREERTOS_PORT = ARM_CM0
+FREERTOS_PORTABLE_SRC = $(FREERTOS_PORTABLE_PATH)/ARM_CM0
 
 # flash target using on-board stlink
 flash: flash-stlink
diff --git a/src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c b/src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c
index 23b328b49..32bab2bed 100644
--- a/src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c
+++ b/src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c
@@ -367,7 +367,11 @@ void dcd_int_enable (uint8_t rhport)
   NVIC_EnableIRQ(USBWakeUp_IRQn);
 
 #elif CFG_TUSB_MCU == OPT_MCU_STM32G0
-  NVIC_EnableIRQ(USB_UCPD1_2_IRQn);
+  #ifdef STM32G0B0xx
+    NVIC_EnableIRQ(USB_IRQn);
+  #else
+    NVIC_EnableIRQ(USB_UCPD1_2_IRQn);
+  #endif
 
 #elif CFG_TUSB_MCU == OPT_MCU_STM32WB
   NVIC_EnableIRQ(USB_HP_IRQn);
@@ -420,7 +424,11 @@ void dcd_int_disable(uint8_t rhport)
   NVIC_DisableIRQ(USBWakeUp_IRQn);
 
 #elif CFG_TUSB_MCU == OPT_MCU_STM32G0
-  NVIC_DisableIRQ(USB_UCPD1_2_IRQn);
+  #ifdef STM32G0B0xx
+    NVIC_DisableIRQ(USB_IRQn);
+  #else
+    NVIC_DisableIRQ(USB_UCPD1_2_IRQn);
+  #endif
 
 #elif CFG_TUSB_MCU == OPT_MCU_STM32WB
   NVIC_DisableIRQ(USB_HP_IRQn);
diff --git a/src/portable/st/stm32_fsdev/dcd_stm32_fsdev_pvt_st.h b/src/portable/st/stm32_fsdev/dcd_stm32_fsdev_pvt_st.h
index c0f923c8f..32f715e6e 100644
--- a/src/portable/st/stm32_fsdev/dcd_stm32_fsdev_pvt_st.h
+++ b/src/portable/st/stm32_fsdev/dcd_stm32_fsdev_pvt_st.h
@@ -184,6 +184,7 @@ TU_ATTR_ALWAYS_INLINE static inline uint16_t pcd_aligned_buffer_size(uint16_t si
 TU_ATTR_ALWAYS_INLINE static inline void pcd_set_endpoint(USB_TypeDef * USBx, uint32_t bEpIdx, uint32_t wRegValue)
 {
 #ifdef PMA_32BIT_ACCESS
+  (void) USBx;
   __O uint32_t *reg = (__O uint32_t *)(USB_DRD_BASE + bEpIdx*4);
   *reg = wRegValue;
 #else
@@ -195,6 +196,7 @@ TU_ATTR_ALWAYS_INLINE static inline void pcd_set_endpoint(USB_TypeDef * USBx, ui
 /* GetENDPOINT */
 TU_ATTR_ALWAYS_INLINE static inline uint32_t pcd_get_endpoint(USB_TypeDef * USBx, uint32_t bEpIdx) {
 #ifdef PMA_32BIT_ACCESS
+  (void) USBx;
   __I uint32_t *reg = (__I uint32_t *)(USB_DRD_BASE + bEpIdx*4);
 #else
   __I uint16_t *reg = (__I uint16_t *)((&USBx->EP0R) + bEpIdx*2u);
@@ -249,6 +251,7 @@ TU_ATTR_ALWAYS_INLINE static inline void pcd_clear_tx_ep_ctr(USB_TypeDef * USBx,
 TU_ATTR_ALWAYS_INLINE static inline uint32_t pcd_get_ep_tx_cnt(USB_TypeDef * USBx, uint32_t bEpIdx)
 {
 #ifdef PMA_32BIT_ACCESS
+  (void) USBx;
   return (pma32[2*bEpIdx] & 0x03FF0000) >> 16;
 #else
   __I uint16_t *regPtr = pcd_ep_tx_cnt_ptr(USBx, bEpIdx);
@@ -259,6 +262,7 @@ TU_ATTR_ALWAYS_INLINE static inline uint32_t pcd_get_ep_tx_cnt(USB_TypeDef * USB
 TU_ATTR_ALWAYS_INLINE static inline uint32_t pcd_get_ep_rx_cnt(USB_TypeDef * USBx, uint32_t bEpIdx)
 {
 #ifdef PMA_32BIT_ACCESS
+  (void) USBx;
   return (pma32[2*bEpIdx + 1] & 0x03FF0000) >> 16;
 #else
   __I uint16_t *regPtr = pcd_ep_rx_cnt_ptr(USBx, bEpIdx);
@@ -285,6 +289,7 @@ TU_ATTR_ALWAYS_INLINE static inline void pcd_set_ep_address(USB_TypeDef * USBx,
 TU_ATTR_ALWAYS_INLINE static inline uint32_t pcd_get_ep_tx_address(USB_TypeDef * USBx, uint32_t bEpIdx)
 {
 #ifdef PMA_32BIT_ACCESS
+  (void) USBx;
   return pma32[2*bEpIdx] & 0x0000FFFFu ;
 #else
   return *pcd_btable_word_ptr(USBx,(bEpIdx)*4u + 0u);
@@ -294,6 +299,7 @@ TU_ATTR_ALWAYS_INLINE static inline uint32_t pcd_get_ep_tx_address(USB_TypeDef *
 TU_ATTR_ALWAYS_INLINE static inline uint32_t pcd_get_ep_rx_address(USB_TypeDef * USBx, uint32_t bEpIdx)
 {
 #ifdef PMA_32BIT_ACCESS
+  (void) USBx;
   return pma32[2*bEpIdx + 1] & 0x0000FFFFu;
 #else
   return *pcd_btable_word_ptr(USBx,(bEpIdx)*4u + 2u);
@@ -303,6 +309,7 @@ TU_ATTR_ALWAYS_INLINE static inline uint32_t pcd_get_ep_rx_address(USB_TypeDef *
 TU_ATTR_ALWAYS_INLINE static inline void pcd_set_ep_tx_address(USB_TypeDef * USBx, uint32_t bEpIdx, uint32_t addr)
 {
 #ifdef PMA_32BIT_ACCESS
+  (void) USBx;
   pma32[2*bEpIdx] = (pma32[2*bEpIdx] & 0xFFFF0000u) | (addr & 0x0000FFFCu);
 #else
   *pcd_btable_word_ptr(USBx,(bEpIdx)*4u + 0u) = addr;
@@ -312,6 +319,7 @@ TU_ATTR_ALWAYS_INLINE static inline void pcd_set_ep_tx_address(USB_TypeDef * USB
 TU_ATTR_ALWAYS_INLINE static inline void pcd_set_ep_rx_address(USB_TypeDef * USBx, uint32_t bEpIdx, uint32_t addr)
 {
 #ifdef PMA_32BIT_ACCESS
+  (void) USBx;
   pma32[2*bEpIdx + 1] = (pma32[2*bEpIdx + 1] & 0xFFFF0000u) | (addr & 0x0000FFFCu);
 #else
   *pcd_btable_word_ptr(USBx,(bEpIdx)*4u + 2u) = addr;
@@ -321,6 +329,7 @@ TU_ATTR_ALWAYS_INLINE static inline void pcd_set_ep_rx_address(USB_TypeDef * USB
 TU_ATTR_ALWAYS_INLINE static inline void pcd_set_ep_tx_cnt(USB_TypeDef * USBx, uint32_t bEpIdx, uint32_t wCount)
 {
 #ifdef PMA_32BIT_ACCESS
+  (void) USBx;
   pma32[2*bEpIdx] = (pma32[2*bEpIdx] & ~0x03FF0000u) | ((wCount & 0x3FFu) << 16);
 #else
   __IO uint16_t * reg = pcd_ep_tx_cnt_ptr(USBx, bEpIdx);
@@ -331,6 +340,7 @@ TU_ATTR_ALWAYS_INLINE static inline void pcd_set_ep_tx_cnt(USB_TypeDef * USBx, u
 TU_ATTR_ALWAYS_INLINE static inline void pcd_set_ep_rx_cnt(USB_TypeDef * USBx, uint32_t bEpIdx, uint32_t wCount)
 {
 #ifdef PMA_32BIT_ACCESS
+  (void) USBx;
   pma32[2*bEpIdx + 1] = (pma32[2*bEpIdx + 1] & ~0x03FF0000u) | ((wCount & 0x3FFu) << 16);
 #else
   __IO uint16_t * reg = pcd_ep_rx_cnt_ptr(USBx, bEpIdx);
@@ -342,6 +352,7 @@ TU_ATTR_ALWAYS_INLINE static inline void pcd_set_ep_blsize_num_blocks(USB_TypeDe
 {
   /* Encode into register. When BLSIZE==1, we need to subtract 1 block count */
 #ifdef PMA_32BIT_ACCESS
+  (void) USBx;
   pma32[rxtx_idx] = (pma32[rxtx_idx] & 0x0000FFFFu) | (blocksize << 31) | ((numblocks - blocksize) << 26);
 #else
   __IO uint16_t *pdwReg = pcd_btable_word_ptr(USBx, rxtx_idx*2u + 1u);

From 818bda18c23e17c08c689b543d77ecc944681dea Mon Sep 17 00:00:00 2001
From: HiFiPhile <admin@hifiphile.com>
Date: Fri, 14 Apr 2023 23:34:20 +0200
Subject: [PATCH 11/16] Fix FIFO transfer and buffer alignment.

---
 src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c | 166 +++++++++++++++---
 .../st/stm32_fsdev/dcd_stm32_fsdev_pvt_st.h   |   2 +-
 2 files changed, 142 insertions(+), 26 deletions(-)

diff --git a/src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c b/src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c
index 32bab2bed..b8d04331a 100644
--- a/src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c
+++ b/src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c
@@ -186,12 +186,12 @@ static void dcd_ep_ctr_handler(void);
 static uint8_t open_ep_count;
 static uint16_t ep_buf_ptr; ///< Points to first free memory location
 static void dcd_pma_alloc_reset(void);
-static uint16_t dcd_pma_alloc(uint8_t ep_addr, size_t length);
+static uint16_t dcd_pma_alloc(uint8_t ep_addr, uint16_t length);
 static void dcd_pma_free(uint8_t ep_addr);
 static void dcd_ep_free(uint8_t ep_addr);
 static uint8_t dcd_ep_alloc(uint8_t ep_addr, uint8_t ep_type);
-static bool dcd_write_packet_memory(uint16_t dst, const void *__restrict src, size_t wNBytes);
-static bool dcd_read_packet_memory(void *__restrict dst, uint16_t src, size_t wNBytes);
+static bool dcd_write_packet_memory(uint16_t dst, const void *__restrict src, uint16_t wNBytes);
+static bool dcd_read_packet_memory(void *__restrict dst, uint16_t src, uint16_t wNBytes);
 
 static bool dcd_write_packet_memory_ff(tu_fifo_t * ff, uint16_t dst, uint16_t wNBytes);
 static bool dcd_read_packet_memory_ff(tu_fifo_t * ff, uint16_t src, uint16_t wNBytes);
@@ -792,7 +792,7 @@ static void dcd_pma_alloc_reset(void)
  *
  * During failure, TU_ASSERT is used. If this happens, rework/reallocate memory manually.
  */
-static uint16_t dcd_pma_alloc(uint8_t ep_addr, size_t length)
+static uint16_t dcd_pma_alloc(uint8_t ep_addr, uint16_t length)
 {
   xfer_ctl_t* epXferCtl = xfer_ctl_ptr(ep_addr);
 
@@ -804,6 +804,13 @@ static uint16_t dcd_pma_alloc(uint8_t ep_addr, size_t length)
     return epXferCtl->pma_ptr;
   }
 
+  // Ensure allocated buffer is aligned
+#ifdef PMA_32BIT_ACCESS
+  length = (length + 3) & ~0x03;
+#else
+  length = (length + 1) & ~0x01;
+#endif
+
   open_ep_count++;
 
   uint16_t addr = ep_buf_ptr;
@@ -814,7 +821,7 @@ static uint16_t dcd_pma_alloc(uint8_t ep_addr, size_t length)
 
   epXferCtl->pma_ptr = addr;
   epXferCtl->pma_alloc_size = length;
-  //TU_LOG2("dcd_pma_alloc(%x,%x)=%x\r\n",ep_addr,length,addr);
+  //TU_LOG1("dcd_pma_alloc(%x,%x)=%x\r\n",ep_addr,length,addr);
 
   return addr;
 }
@@ -1240,15 +1247,36 @@ void dcd_edpt_clear_stall (uint8_t rhport, uint8_t ep_addr)
 }
 
 #ifdef PMA_32BIT_ACCESS
-static bool dcd_write_packet_memory(uint16_t dst, const void *__restrict src, size_t wNBytes)
+static bool dcd_write_packet_memory(uint16_t dst, const void *__restrict src, uint16_t wNBytes)
 {
-  // FIXME original function uses byte-access to source memory (to support non-aligned buffers)
-  const uint32_t* src32 = (const uint32_t*)(src);
+  const uint8_t* srcVal = src;
   volatile uint32_t* dst32 = (volatile uint32_t*)(USB_PMAADDR + dst);
-  for (unsigned n=wNBytes/4; n>0; --n) {
-    *dst32++ = *src32++;
+
+  for (uint32_t n = wNBytes / 4; n > 0; --n) {
+    *dst32++ = tu_unaligned_read32(srcVal);
+    srcVal += 4;
   }
-  *dst32 = (*src32) & ((1<<8*(wNBytes % 4)) - 1);
+
+  wNBytes = wNBytes & 0x03;
+  if (wNBytes)
+  {
+    uint32_t wrVal = *srcVal;
+    wNBytes--;
+
+    if (wNBytes)
+    {
+      wrVal |= *++srcVal << 8;
+      wNBytes--;
+
+      if (wNBytes)
+      {
+        wrVal |= *++srcVal << 16;
+      }
+    }
+
+    *dst32 = wrVal;
+  }
+
   return true;
 }
 #else
@@ -1263,7 +1291,7 @@ static bool dcd_write_packet_memory(uint16_t dst, const void *__restrict src, si
   * @param   wNBytes no. of bytes to be copied.
   * @retval None
   */
-static bool dcd_write_packet_memory(uint16_t dst, const void *__restrict src, size_t wNBytes)
+static bool dcd_write_packet_memory(uint16_t dst, const void *__restrict src, uint16_t wNBytes)
 {
   uint32_t n = (uint32_t)wNBytes >> 1U;
   uint16_t temp1, temp2;
@@ -1286,7 +1314,7 @@ static bool dcd_write_packet_memory(uint16_t dst, const void *__restrict src, si
     srcVal++;
   }
 
-  if (wNBytes & 0x01)
+  if (wNBytes)
   {
     temp1 = *srcVal;
     *pdwVal = temp1;
@@ -1313,7 +1341,37 @@ static bool dcd_write_packet_memory_ff(tu_fifo_t * ff, uint16_t dst, uint16_t wN
 
   // We want to read from the FIFO and write it into the PMA, if LIN part is ODD and has WRAPPED part,
   // last lin byte will be combined with wrapped part
-  // To ensure PMA is always access 16bit aligned (dst aligned to 16 bit)
+  // To ensure PMA is always access aligned (dst aligned to 16 or 32 bit)
+#ifdef PMA_32BIT_ACCESS
+  if((cnt_lin & 0x03) && cnt_wrap)
+  {
+    // Copy first linear part
+    dcd_write_packet_memory(dst, info.ptr_lin, cnt_lin &~0x03);
+    dst += cnt_lin &~0x03;
+
+    // Copy last linear bytes & first wrapped bytes to buffer
+    uint32_t i;
+    uint8_t tmp[4];
+    for (i = 0; i < (cnt_lin & 0x03); i++)
+    {
+      tmp[i] = ((uint8_t*)info.ptr_lin)[(cnt_lin &~0x03) + i];
+    }
+    uint32_t wCnt = cnt_wrap;
+    for (; i < 4 && wCnt > 0; i++, wCnt--)
+    {
+      tmp[i] = *(uint8_t*)info.ptr_wrap;
+      info.ptr_wrap = (uint8_t*)info.ptr_wrap + 1;
+    }
+
+    // Write unaligned buffer
+    dcd_write_packet_memory(dst, &tmp, 4);
+    dst += 4;
+
+    // Copy rest of wrapped byte
+    if (wCnt)
+        dcd_write_packet_memory(dst, info.ptr_wrap, wCnt);
+  }
+#else
   if((cnt_lin & 0x01) && cnt_wrap)
   {
     // Copy first linear part
@@ -1328,6 +1386,7 @@ static bool dcd_write_packet_memory_ff(tu_fifo_t * ff, uint16_t dst, uint16_t wN
     // Copy rest of wrapped byte
     dcd_write_packet_memory(dst, ((uint8_t*)info.ptr_wrap) + 1, cnt_wrap - 1);
   }
+#endif
   else
   {
     // Copy linear part
@@ -1347,11 +1406,37 @@ static bool dcd_write_packet_memory_ff(tu_fifo_t * ff, uint16_t dst, uint16_t wN
 }
 
 #ifdef PMA_32BIT_ACCESS
-static bool dcd_read_packet_memory(void *__restrict dst, uint16_t src, size_t wNBytes)
+static bool dcd_read_packet_memory(void *__restrict dst, uint16_t src, uint16_t wNBytes)
 {
-    // FIXME this should probably be modified for possible unaligned access?
-    memcpy(dst, (void*)(USB_PMAADDR+src), wNBytes);
-    return true;
+  uint8_t* dstVal = dst;
+  volatile uint32_t* src32 = (volatile uint32_t*)(USB_PMAADDR + src);
+
+  for (uint32_t n = wNBytes / 4; n > 0; --n) {
+    tu_unaligned_write32(dstVal, *src32++);
+    dstVal += 4;
+  }
+
+  wNBytes = wNBytes & 0x03;
+  if (wNBytes)
+  {
+    uint32_t rdVal = *src32;
+
+    *dstVal = tu_u32_byte0(rdVal);
+    wNBytes--;
+
+    if (wNBytes)
+    {
+      *++dstVal = tu_u32_byte1(rdVal);
+      wNBytes--;
+
+      if (wNBytes)
+      {
+        *++dstVal = tu_u32_byte2(rdVal);
+      }
+    }
+  }
+
+  return true;
 }
 #else
 /**
@@ -1360,7 +1445,7 @@ static bool dcd_read_packet_memory(void *__restrict dst, uint16_t src, size_t wN
   * @param   wNBytes no. of bytes to be copied.
   * @retval None
   */
-static bool dcd_read_packet_memory(void *__restrict dst, uint16_t src, size_t wNBytes)
+static bool dcd_read_packet_memory(void *__restrict dst, uint16_t src, uint16_t wNBytes)
 {
   uint32_t n = (uint32_t)wNBytes >> 1U;
   // The GCC optimizer will combine access to 32-bit sizes if we let it. Force
@@ -1405,9 +1490,39 @@ static bool dcd_read_packet_memory_ff(tu_fifo_t * ff, uint16_t src, uint16_t wNB
   uint16_t cnt_lin =  TU_MIN(wNBytes, info.len_lin);
   uint16_t cnt_wrap = TU_MIN(wNBytes - cnt_lin, info.len_wrap);
 
+
   // We want to read from PMA and write it into the FIFO, if LIN part is ODD and has WRAPPED part,
   // last lin byte will be combined with wrapped part
-  // To ensure PMA is always access 16bit aligned (src aligned to 16 bit)
+  // To ensure PMA is always access aligned (src aligned to 16 or 32 bit)
+#ifdef PMA_32BIT_ACCESS
+  if((cnt_lin & 0x03) && cnt_wrap)
+  {
+    // Copy first linear part
+    dcd_read_packet_memory(info.ptr_lin, src, cnt_lin &~0x03);
+    src += cnt_lin &~0x03;
+
+    // Copy last linear bytes & first wrapped bytes
+    uint8_t tmp[4];
+    dcd_read_packet_memory(tmp, src, 4);
+    src += 4;
+
+    uint32_t i;
+    for (i = 0; i < (cnt_lin & 0x03); i++)
+    {
+      ((uint8_t*)info.ptr_lin)[(cnt_lin &~0x03) + i] = tmp[i];
+    }
+    uint32_t wCnt = cnt_wrap;
+    for (; i < 4 && wCnt > 0; i++, wCnt--)
+    {
+      *(uint8_t*)info.ptr_wrap = tmp[i];
+      info.ptr_wrap = (uint8_t*)info.ptr_wrap + 1;
+    }
+
+    // Copy rest of wrapped byte
+    if (wCnt)
+      dcd_read_packet_memory(info.ptr_wrap, src, wCnt);
+  }
+#else
   if((cnt_lin & 0x01) && cnt_wrap)
   {
     // Copy first linear part
@@ -1415,16 +1530,17 @@ static bool dcd_read_packet_memory_ff(tu_fifo_t * ff, uint16_t src, uint16_t wNB
     src += cnt_lin &~0x01;
 
     // Copy last linear byte & first wrapped byte
-    uint16_t tmp;
-    dcd_read_packet_memory(&tmp, src, 2);
-
-    ((uint8_t*)info.ptr_lin)[cnt_lin - 1] = (uint8_t)tmp;
-    ((uint8_t*)info.ptr_wrap)[0] = (uint8_t)(tmp >> 8U);
+    uint8_t tmp[2];
+    dcd_read_packet_memory(tmp, src, 2);
     src += 2;
 
+    ((uint8_t*)info.ptr_lin)[cnt_lin - 1] = tmp[0];
+    ((uint8_t*)info.ptr_wrap)[0] = tmp[1];
+
     // Copy rest of wrapped byte
     dcd_read_packet_memory(((uint8_t*)info.ptr_wrap) + 1, src, cnt_wrap - 1);
   }
+#endif
   else
   {
     // Copy linear part
diff --git a/src/portable/st/stm32_fsdev/dcd_stm32_fsdev_pvt_st.h b/src/portable/st/stm32_fsdev/dcd_stm32_fsdev_pvt_st.h
index 32f715e6e..e6649de5a 100644
--- a/src/portable/st/stm32_fsdev/dcd_stm32_fsdev_pvt_st.h
+++ b/src/portable/st/stm32_fsdev/dcd_stm32_fsdev_pvt_st.h
@@ -85,7 +85,7 @@
 #elif CFG_TUSB_MCU == OPT_MCU_STM32G0
   #include "stm32g0xx.h"
   #define PMA_32BIT_ACCESS
-  #define PMA_LENGTH (1024u) // FIXME it is 2048, really
+  #define PMA_LENGTH (2048u)
   #undef USB_PMAADDR
   #define USB_PMAADDR USB_DRD_PMAADDR
   #define USB_TypeDef USB_DRD_TypeDef

From 412b557a080526fbfe7b42dd8aa07468c16413cc Mon Sep 17 00:00:00 2001
From: Mengsk <admin@hifiphile.com>
Date: Mon, 17 Apr 2023 15:34:20 +0200
Subject: [PATCH 12/16] Cleanup unnecessary code for 16bit access.

---
 src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c | 39 ++++---------------
 1 file changed, 7 insertions(+), 32 deletions(-)

diff --git a/src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c b/src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c
index b8d04331a..14cabaf8d 100644
--- a/src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c
+++ b/src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c
@@ -210,17 +210,6 @@ TU_ATTR_ALWAYS_INLINE static inline xfer_ctl_t* xfer_ctl_ptr(uint32_t ep_addr)
   return &xfer_status[epnum][dir];
 }
 
-// Using a function due to better type checks
-// This seems better than having to do type casts everywhere else
-TU_ATTR_ALWAYS_INLINE static inline void reg16_clear_bits(__IO uint16_t *reg, uint16_t mask) {
-  *reg = (uint16_t)(*reg & ~mask);
-}
-
-// Bits in ISTR are cleared upon writing 0
-TU_ATTR_ALWAYS_INLINE static inline void clear_istr_bits(uint32_t mask) {
-  USB->ISTR = ~mask;
-}
-
 //--------------------------------------------------------------------+
 // Controller API
 //--------------------------------------------------------------------+
@@ -244,11 +233,7 @@ void dcd_init (uint8_t rhport)
     asm("NOP");
   }
 
-#ifdef PMA_32BIT_ACCESS // CNTR register is 32bits on STM32G0, 16bit on older versions
   USB->CNTR &= ~USB_CNTR_PDWN;
-#else
-  reg16_clear_bits(&USB->CNTR, USB_CNTR_PDWN);// Remove powerdown
-#endif
 
   // Wait startup time, for F042 and F070, this is <= 1 us.
   for(uint32_t i = 0; i<200; i++) // should be a few us
@@ -492,7 +477,6 @@ static void dcd_handle_bus_reset(void)
   //__IO uint16_t * const epreg = &(EPREG(0));
   USB->DADDR = 0u; // disable USB peripheral by clearing the EF flag
 
-
   for(uint32_t i=0; i<STFSDEV_EP_COUNT; i++)
   {
     // Clear all EPREG (or maybe this is automatic? I'm not sure)
@@ -683,13 +667,13 @@ void dcd_int_handler(uint8_t rhport) {
 
   /* Put SOF flag at the beginning of ISR in case to get least amount of jitter if it is used for timing purposes */
   if(int_status & USB_ISTR_SOF) {
-    clear_istr_bits(USB_ISTR_SOF);
+    USB->ISTR &=~USB_ISTR_SOF;
     dcd_event_sof(0, USB->FNR & USB_FNR_FN, true);
   }
 
   if(int_status & USB_ISTR_RESET) {
     // USBRST is start of reset.
-    clear_istr_bits(USB_ISTR_RESET);
+    USB->ISTR &=~USB_ISTR_RESET;
     dcd_handle_bus_reset();
     dcd_event_bus_reset(0, TUSB_SPEED_FULL, true);
     return; // Don't do the rest of the things here; perhaps they've been cleared?
@@ -704,14 +688,10 @@ void dcd_int_handler(uint8_t rhport) {
 
   if (int_status & USB_ISTR_WKUP)
   {
-#ifdef PMA_32BIT_ACCESS // CNTR register is 32bits on STM32G0, 16bit on older versions
     USB->CNTR &= ~USB_CNTR_LPMODE;
     USB->CNTR &= ~USB_CNTR_FSUSP;
-#else
-    reg16_clear_bits(&USB->CNTR, USB_CNTR_LPMODE);
-    reg16_clear_bits(&USB->CNTR, USB_CNTR_FSUSP);
-#endif
-    clear_istr_bits(USB_ISTR_WKUP);
+
+    USB->ISTR &=~USB_ISTR_WKUP;
     dcd_event_bus_signal(0, DCD_EVENT_RESUME, true);
   }
 
@@ -725,7 +705,7 @@ void dcd_int_handler(uint8_t rhport) {
     USB->CNTR |= USB_CNTR_LPMODE;
 
     /* clear of the ISTR bit must be done after setting of CNTR_FSUSP */
-    clear_istr_bits(USB_ISTR_SUSP);
+    USB->ISTR &=~USB_ISTR_SUSP;
     dcd_event_bus_signal(0, DCD_EVENT_SUSPEND, true);
   }
 
@@ -738,7 +718,7 @@ void dcd_int_handler(uint8_t rhport) {
     {
       remoteWakeCountdown--;
     }
-    clear_istr_bits(USB_ISTR_ESOF);
+    USB->ISTR &=~USB_ISTR_ESOF;
   }
 }
 
@@ -759,13 +739,8 @@ void dcd_edpt0_status_complete(uint8_t rhport, tusb_control_request_t const * re
     uint8_t const dev_addr = (uint8_t) request->wValue;
 
     // Setting new address after the whole request is complete
-#ifdef PMA_32BIT_ACCESS
     USB->DADDR &= ~USB_DADDR_ADD;
-    USB->DADDR = (USB->DADDR & ~USB_DADDR_ADD_Msk) | dev_addr; // leave the enable bit set
-#else
-    reg16_clear_bits(&USB->DADDR, USB_DADDR_ADD);
-    USB->DADDR = (uint16_t)(USB->DADDR | dev_addr); // leave the enable bit set
-#endif
+    USB->DADDR |= dev_addr; // leave the enable bit set
   }
 }
 

From 6b44d8fb55345e19fd82a6169258fbf357a15f81 Mon Sep 17 00:00:00 2001
From: hathach <thach@tinyusb.org>
Date: Thu, 1 Jun 2023 15:58:02 +0700
Subject: [PATCH 13/16] add cmake support for g0, exlicitly call HAL_Init() and
 also HAL_IncTick() in systick irq, fix button active state.

---
 hw/bsp/lpc18/family.cmake                     |   5 -
 .../boards/stm32g0b1nucleo/board.cmake        |  15 ++
 hw/bsp/stm32g0/boards/stm32g0b1nucleo/board.h |  15 +-
 hw/bsp/stm32g0/family.c                       |   2 +
 hw/bsp/stm32g0/family.cmake                   | 137 ++++++++++++++++++
 tools/cmake/cpu/cortex-m0plus.cmake           |  11 ++
 6 files changed, 169 insertions(+), 16 deletions(-)
 create mode 100644 hw/bsp/stm32g0/boards/stm32g0b1nucleo/board.cmake
 create mode 100644 hw/bsp/stm32g0/family.cmake
 create mode 100644 tools/cmake/cpu/cortex-m0plus.cmake

diff --git a/hw/bsp/lpc18/family.cmake b/hw/bsp/lpc18/family.cmake
index 1bfc63d21..515348e10 100644
--- a/hw/bsp/lpc18/family.cmake
+++ b/hw/bsp/lpc18/family.cmake
@@ -46,14 +46,9 @@ if (NOT TARGET ${BOARD_TARGET})
     )
   update_board(${BOARD_TARGET})
 
-  if (NOT DEFINED LD_FILE_${TOOLCHAIN})
-    MESSAGE(FATAL_ERROR "LD_FILE_${TOOLCHAIN} not defined")
-  endif ()
-
   if (TOOLCHAIN STREQUAL "gcc")
     target_link_options(${BOARD_TARGET} PUBLIC
       "LINKER:--script=${LD_FILE_gcc}"
-      "LINKER:-Map=$<IF:$<BOOL:$<TARGET_PROPERTY:OUTPUT_NAME>>,$<TARGET_PROPERTY:OUTPUT_NAME>,$<TARGET_PROPERTY:NAME>>${CMAKE_EXECUTABLE_SUFFIX}.map"
       # nanolib
       --specs=nosys.specs
       --specs=nano.specs
diff --git a/hw/bsp/stm32g0/boards/stm32g0b1nucleo/board.cmake b/hw/bsp/stm32g0/boards/stm32g0b1nucleo/board.cmake
new file mode 100644
index 000000000..c9f2a9c8e
--- /dev/null
+++ b/hw/bsp/stm32g0/boards/stm32g0b1nucleo/board.cmake
@@ -0,0 +1,15 @@
+#set(MCU_VARIANT MIMXRT1011)
+set(JLINK_DEVICE STM32G0B1RE)
+
+set(LD_FILE_gcc ${CMAKE_CURRENT_LIST_DIR}/STM32G0B1RETx_FLASH.ld)
+set(LD_FILE_iar ${ST_CMSIS}/Source/Templates/iar/linker/stm32g0b1xx_flash.icf)
+
+set(STARTUP_FILE_gcc ${ST_CMSIS}/Source/Templates/gcc/startup_stm32g0b1xx.s)
+set(STARTUP_FILE_iar ${ST_CMSIS}/Source/Templates/iar/startup_stm32g0b1xx.s)
+
+function(update_board TARGET)
+  target_compile_definitions(${TARGET} PUBLIC
+    STM32G0B1xx
+    #HSE_VALUE=8000000U
+    )
+endfunction()
diff --git a/hw/bsp/stm32g0/boards/stm32g0b1nucleo/board.h b/hw/bsp/stm32g0/boards/stm32g0b1nucleo/board.h
index 0d651ea4e..e622c71c2 100644
--- a/hw/bsp/stm32g0/boards/stm32g0b1nucleo/board.h
+++ b/hw/bsp/stm32g0/boards/stm32g0b1nucleo/board.h
@@ -44,7 +44,7 @@
 // Button
 #define BUTTON_PORT           GPIOC
 #define BUTTON_PIN            GPIO_PIN_13
-#define BUTTON_STATE_ACTIVE   1
+#define BUTTON_STATE_ACTIVE   0
 
 // UART Enable for STLink VCOM
 #define UART_DEV              USART2
@@ -64,17 +64,11 @@ static inline void board_clock_init(void)
   RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
   RCC_PeriphCLKInitTypeDef  PeriphClkInitStruct = { 0 };
 
-  /** Tick priority is used in HAL_RCC_OscConfig, so we need to enable it now
-  */
-  HAL_InitTick(0);
-
-  /** Configure the main internal regulator output voltage
-  */
+  /** Configure the main internal regulator output voltage */
   HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1);
 
   /** Initializes the RCC Oscillators according to the specified parameters
-  * in the RCC_OscInitTypeDef structure.
-  */
+  * in the RCC_OscInitTypeDef structure. */
   RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
   RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS;
   RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
@@ -91,8 +85,7 @@ static inline void board_clock_init(void)
   PeriphClkInitStruct.UsbClockSelection = RCC_USBCLKSOURCE_PLL;
   HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct);
 
-  /** Initializes the CPU, AHB and APB buses clocks
-  */
+  /** Initializes the CPU, AHB and APB buses clocks */
   RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                               |RCC_CLOCKTYPE_PCLK1;
   RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
diff --git a/hw/bsp/stm32g0/family.c b/hw/bsp/stm32g0/family.c
index 10023b7e2..1a975915f 100644
--- a/hw/bsp/stm32g0/family.c
+++ b/hw/bsp/stm32g0/family.c
@@ -44,6 +44,7 @@ UART_HandleTypeDef UartHandle;
 
 void board_init(void)
 {
+  HAL_Init(); // required for HAL_RCC_Osc TODO check with freeRTOS
   board_clock_init();
 
   // Enable All GPIOs clocks
@@ -162,6 +163,7 @@ volatile uint32_t system_ticks = 0;
 void SysTick_Handler (void)
 {
   system_ticks++;
+  HAL_IncTick();
 }
 
 uint32_t board_millis(void)
diff --git a/hw/bsp/stm32g0/family.cmake b/hw/bsp/stm32g0/family.cmake
new file mode 100644
index 000000000..5fc9387e5
--- /dev/null
+++ b/hw/bsp/stm32g0/family.cmake
@@ -0,0 +1,137 @@
+include_guard()
+
+if (NOT BOARD)
+  message(FATAL_ERROR "BOARD not specified")
+endif ()
+
+set(ST_FAMILY g0)
+set(ST_PREFIX stm32${ST_FAMILY}xx)
+
+set(ST_HAL_DRIVER ${TOP}/hw/mcu/st/stm32${ST_FAMILY}xx_hal_driver)
+set(ST_CMSIS ${TOP}/hw/mcu/st/cmsis_device_${ST_FAMILY})
+set(CMSIS_5 ${TOP}/lib/CMSIS_5)
+
+# enable LTO
+#set(CMAKE_INTERPROCEDURAL_OPTIMIZATION TRUE)
+
+# toolchain set up
+set(CMAKE_SYSTEM_PROCESSOR cortex-m0plus CACHE INTERNAL "System Processor")
+set(CMAKE_TOOLCHAIN_FILE ${TOP}/tools/cmake/toolchain/arm_${TOOLCHAIN}.cmake)
+
+set(FAMILY_MCUS STM32G0 CACHE INTERNAL "")
+
+# include board specific
+include(${CMAKE_CURRENT_LIST_DIR}/boards/${BOARD}/board.cmake)
+
+
+#------------------------------------
+# BOARD_TARGET
+#------------------------------------
+# only need to be built ONCE for all examples
+set(BOARD_TARGET board_${BOARD})
+if (NOT TARGET ${BOARD_TARGET})
+  add_library(${BOARD_TARGET} STATIC
+    ${ST_CMSIS}/Source/Templates/system_${ST_PREFIX}.c
+    ${ST_HAL_DRIVER}/Src/${ST_PREFIX}_hal.c
+    ${ST_HAL_DRIVER}/Src/${ST_PREFIX}_hal_cortex.c
+    ${ST_HAL_DRIVER}/Src/${ST_PREFIX}_hal_pwr_ex.c
+    ${ST_HAL_DRIVER}/Src/${ST_PREFIX}_hal_rcc.c
+    ${ST_HAL_DRIVER}/Src/${ST_PREFIX}_hal_rcc_ex.c
+    ${ST_HAL_DRIVER}/Src/${ST_PREFIX}_hal_gpio.c
+    ${ST_HAL_DRIVER}/Src/${ST_PREFIX}_hal_uart.c
+    ${ST_HAL_DRIVER}/Src/${ST_PREFIX}_hal_uart_ex.c
+    )
+  target_include_directories(${BOARD_TARGET} PUBLIC
+    ${CMAKE_CURRENT_LIST_DIR}
+    ${CMSIS_5}/CMSIS/Core/Include
+    ${ST_CMSIS}/Include
+    ${ST_HAL_DRIVER}/Inc
+    )
+  target_compile_options(${BOARD_TARGET} PUBLIC
+    )
+  target_compile_definitions(${BOARD_TARGET} PUBLIC
+    )
+  update_board(${BOARD_TARGET})
+
+  target_sources(${BOARD_TARGET} PUBLIC
+    ${STARTUP_FILE_${TOOLCHAIN}}
+    )
+
+  if (TOOLCHAIN STREQUAL "gcc")
+    target_link_options(${BOARD_TARGET} PUBLIC
+      "LINKER:--script=${LD_FILE_gcc}"
+      -nostartfiles
+      # nanolib
+      --specs=nosys.specs
+      --specs=nano.specs
+      )
+  else ()
+    # TODO support IAR
+    target_link_options(${BOARD_TARGET} PUBLIC
+      "LINKER:--config=${LD_FILE_iar}"
+      )
+  endif ()
+endif () # BOARD_TARGET
+
+
+#------------------------------------
+# Functions
+#------------------------------------
+function(family_configure_example TARGET)
+  family_configure_common(${TARGET})
+
+  #---------- Port Specific ----------
+  # These files are built for each example since it depends on example's tusb_config.h
+  target_sources(${TARGET} PUBLIC
+    # TinyUSB Port
+    ${TOP}/src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c
+    # BSP
+    ${CMAKE_CURRENT_FUNCTION_LIST_DIR}/family.c
+    ${CMAKE_CURRENT_FUNCTION_LIST_DIR}/../board.c
+    )
+  target_include_directories(${TARGET} PUBLIC
+    # family, hw, board
+    ${CMAKE_CURRENT_FUNCTION_LIST_DIR}
+    ${CMAKE_CURRENT_FUNCTION_LIST_DIR}/../../
+    ${CMAKE_CURRENT_FUNCTION_LIST_DIR}/boards/${BOARD}
+    )
+
+  #---------- TinyUSB ----------
+  # tinyusb target is built for each example since it depends on example's tusb_config.h
+  set(TINYUSB_TARGET_PREFIX ${TARGET}-)
+  add_library(${TARGET}-tinyusb_config INTERFACE)
+
+  target_include_directories(${TARGET}-tinyusb_config INTERFACE
+    ${CMAKE_CURRENT_SOURCE_DIR}/src
+    )
+  target_compile_definitions(${TARGET}-tinyusb_config INTERFACE
+    CFG_TUSB_MCU=OPT_MCU_STM32G0
+    )
+
+  # tinyusb's CMakeList.txt
+  add_subdirectory(${TOP}/src ${CMAKE_CURRENT_BINARY_DIR}/tinyusb)
+
+  # Link dependencies
+  target_link_libraries(${TARGET} PUBLIC ${BOARD_TARGET} ${TARGET}-tinyusb)
+
+  # group target (not yet supported by clion)
+  set_target_properties(${TARGET}-tinyusb ${TARGET}-tinyusb_config
+    PROPERTIES FOLDER ${TARGET}_sub
+    )
+
+  #---------- Flash ----------
+  family_flash_jlink(${TARGET})
+endfunction()
+
+
+function(family_configure_device_example TARGET)
+  family_configure_example(${TARGET})
+endfunction()
+
+function(family_configure_host_example TARGET)
+  family_configure_example(${TARGET})
+endfunction()
+
+function(family_configure_dual_usb_example TARGET)
+  family_configure_example(${TARGET})
+endfunction()
diff --git a/tools/cmake/cpu/cortex-m0plus.cmake b/tools/cmake/cpu/cortex-m0plus.cmake
new file mode 100644
index 000000000..1e316ccfc
--- /dev/null
+++ b/tools/cmake/cpu/cortex-m0plus.cmake
@@ -0,0 +1,11 @@
+if (TOOLCHAIN STREQUAL "gcc")
+  list(APPEND TOOLCHAIN_COMMON_FLAGS
+    -mthumb
+    -mcpu=cortex-m0plus
+    -mfloat-abi=soft
+    )
+
+  set(FREERTOS_PORT GCC_ARM_CM0 CACHE INTERNAL "")
+else ()
+  # TODO support IAR
+endif ()

From 6280cba6e8fb62492d8d07288c914b822b934cd5 Mon Sep 17 00:00:00 2001
From: hathach <thach@tinyusb.org>
Date: Thu, 1 Jun 2023 16:52:58 +0700
Subject: [PATCH 14/16] tested with g0b1 nucleo

---
 hw/bsp/stm32g0/boards/stm32g0b1nucleo/board.h | 58 ++++++++++++++++++-
 1 file changed, 57 insertions(+), 1 deletion(-)

diff --git a/hw/bsp/stm32g0/boards/stm32g0b1nucleo/board.h b/hw/bsp/stm32g0/boards/stm32g0b1nucleo/board.h
index e622c71c2..44c69934d 100644
--- a/hw/bsp/stm32g0/boards/stm32g0b1nucleo/board.h
+++ b/hw/bsp/stm32g0/boards/stm32g0b1nucleo/board.h
@@ -58,6 +58,62 @@
 //--------------------------------------------------------------------+
 // RCC Clock
 //--------------------------------------------------------------------+
+#if 1
+static inline void board_clock_init(void)
+{
+  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
+  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
+
+  /** Configure the main internal regulator output voltage */
+  HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1);
+
+  /** Initializes the RCC Oscillators according to the specified parameters
+  * in the RCC_OscInitTypeDef structure. */
+  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
+  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
+  RCC_OscInitStruct.HSIDiv = RCC_HSI_DIV1;
+  RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
+  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
+  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
+  RCC_OscInitStruct.PLL.PLLM = RCC_PLLM_DIV1;
+  RCC_OscInitStruct.PLL.PLLN = 8;
+  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
+  RCC_OscInitStruct.PLL.PLLQ = RCC_PLLQ_DIV2;
+  RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2;
+  HAL_RCC_OscConfig(&RCC_OscInitStruct);
+
+  /** Initializes the CPU, AHB and APB buses clocks */
+  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_PCLK1;
+  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
+  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
+  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
+  HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2);
+
+  // Configure CRS clock source
+  __HAL_RCC_CRS_CLK_ENABLE();
+  RCC_CRSInitTypeDef RCC_CRSInitStruct = {0};
+  RCC_CRSInitStruct.Prescaler = RCC_CRS_SYNC_DIV1;
+  RCC_CRSInitStruct.Source = RCC_CRS_SYNC_SOURCE_USB;
+  RCC_CRSInitStruct.Polarity = RCC_CRS_SYNC_POLARITY_RISING;
+  RCC_CRSInitStruct.ReloadValue = __HAL_RCC_CRS_RELOADVALUE_CALCULATE(48000000,1000);
+  RCC_CRSInitStruct.ErrorLimitValue = 34;
+  RCC_CRSInitStruct.HSI48CalibrationValue = 32;
+
+  HAL_RCCEx_CRSConfig(&RCC_CRSInitStruct);
+
+  /* Select HSI48 as USB clock source */
+  RCC_PeriphCLKInitTypeDef usb_clk = {0 };
+  usb_clk.PeriphClockSelection = RCC_PERIPHCLK_USB;
+  usb_clk.UsbClockSelection = RCC_USBCLKSOURCE_HSI48;
+  HAL_RCCEx_PeriphCLKConfig(&usb_clk);
+
+  // Enable HSI48
+  RCC_OscInitTypeDef osc_hsi48 = {0};
+  osc_hsi48.OscillatorType = RCC_OSCILLATORTYPE_HSI48;
+  osc_hsi48.HSI48State = RCC_HSI48_ON;
+  HAL_RCC_OscConfig(&osc_hsi48);
+}
+#else
 static inline void board_clock_init(void)
 {
   RCC_OscInitTypeDef RCC_OscInitStruct = {0};
@@ -93,8 +149,8 @@ static inline void board_clock_init(void)
   RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
 
   HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0);
-
 }
+#endif
 
 #ifdef __cplusplus
  }

From c750030f7a9b3076b3722172014604ff5190df91 Mon Sep 17 00:00:00 2001
From: hathach <thach@tinyusb.org>
Date: Thu, 1 Jun 2023 17:03:04 +0700
Subject: [PATCH 15/16] add freertosconfig for g0, add cmake stlink, add g0 to
 cmake ci

---
 .github/workflows/cmake_arm.yml               |   1 +
 hw/bsp/family_support.cmake                   |  13 ++
 .../stm32g0/FreeRTOSConfig/FreeRTOSConfig.h   | 166 ++++++++++++++++++
 hw/bsp/stm32g0/family.cmake                   |   1 +
 4 files changed, 181 insertions(+)
 create mode 100644 hw/bsp/stm32g0/FreeRTOSConfig/FreeRTOSConfig.h

diff --git a/.github/workflows/cmake_arm.yml b/.github/workflows/cmake_arm.yml
index ccca0c9be..2e74c304c 100644
--- a/.github/workflows/cmake_arm.yml
+++ b/.github/workflows/cmake_arm.yml
@@ -37,6 +37,7 @@ jobs:
           - 'mcx'
           - 'imxrt'
           - 'rp2040'
+          - 'stm32g0'
     steps:
     - name: Setup Python
       uses: actions/setup-python@v4
diff --git a/hw/bsp/family_support.cmake b/hw/bsp/family_support.cmake
index 69290ceec..d9b8bbbe9 100644
--- a/hw/bsp/family_support.cmake
+++ b/hw/bsp/family_support.cmake
@@ -189,6 +189,19 @@ exit"
 endfunction()
 
 
+# Add flash stlink target
+function(family_flash_stlink TARGET)
+  if (NOT DEFINED STM32_PROGRAMMER_CLI)
+    set(STM32_PROGRAMMER_CLI STM32_Programmer_CLI)
+  endif ()
+
+  add_custom_target(${TARGET}-stlink
+    DEPENDS ${TARGET}
+    COMMAND ${STM32_PROGRAMMER_CLI} --connect port=swd --write $<TARGET_FILE:${TARGET}> --go
+    )
+endfunction()
+
+
 # Add flash pycod target
 function(family_flash_pyocd TARGET)
   if (NOT DEFINED PYOC)
diff --git a/hw/bsp/stm32g0/FreeRTOSConfig/FreeRTOSConfig.h b/hw/bsp/stm32g0/FreeRTOSConfig/FreeRTOSConfig.h
new file mode 100644
index 000000000..1758efcf2
--- /dev/null
+++ b/hw/bsp/stm32g0/FreeRTOSConfig/FreeRTOSConfig.h
@@ -0,0 +1,166 @@
+/*
+ * FreeRTOS Kernel V10.0.0
+ * Copyright (C) 2017 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software. If you wish to use our Amazon
+ * FreeRTOS name, please do so in a fair use way that does not cause confusion.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * http://www.FreeRTOS.org
+ * http://aws.amazon.com/freertos
+ *
+ * 1 tab == 4 spaces!
+ */
+
+
+#ifndef FREERTOS_CONFIG_H
+#define FREERTOS_CONFIG_H
+
+/*-----------------------------------------------------------
+ * Application specific definitions.
+ *
+ * These definitions should be adjusted for your particular hardware and
+ * application requirements.
+ *
+ * THESE PARAMETERS ARE DESCRIBED WITHIN THE 'CONFIGURATION' SECTION OF THE
+ * FreeRTOS API DOCUMENTATION AVAILABLE ON THE FreeRTOS.org WEB SITE.
+ *
+ * See http://www.freertos.org/a00110.html.
+ *----------------------------------------------------------*/
+
+// IAR assembler have limited preprocessor support and it only need following macros:
+#ifndef __IASMARM__
+// FIXME cause redundant-decls warnings
+extern uint32_t SystemCoreClock;
+#endif
+
+/* Cortex M23/M33 port configuration. */
+#define configENABLE_MPU						0
+#define configENABLE_FPU						0
+#define configENABLE_TRUSTZONE					0
+#define configMINIMAL_SECURE_STACK_SIZE			(1024)
+
+#define configUSE_PREEMPTION                    1
+#define configUSE_PORT_OPTIMISED_TASK_SELECTION 0
+#define configCPU_CLOCK_HZ                      SystemCoreClock
+#define configTICK_RATE_HZ                      ( 1000 )
+#define configMAX_PRIORITIES                    ( 5 )
+#define configMINIMAL_STACK_SIZE                ( 128 )
+#define configTOTAL_HEAP_SIZE                   ( configSUPPORT_DYNAMIC_ALLOCATION*4*1024 )
+#define configMAX_TASK_NAME_LEN                 16
+#define configUSE_16_BIT_TICKS                  0
+#define configIDLE_SHOULD_YIELD                 1
+#define configUSE_MUTEXES                       1
+#define configUSE_RECURSIVE_MUTEXES             1
+#define configUSE_COUNTING_SEMAPHORES           1
+#define configQUEUE_REGISTRY_SIZE               2
+#define configUSE_QUEUE_SETS                    0
+#define configUSE_TIME_SLICING                  0
+#define configUSE_NEWLIB_REENTRANT              0
+#define configENABLE_BACKWARD_COMPATIBILITY     1
+#define configSTACK_ALLOCATION_FROM_SEPARATE_HEAP   0
+
+#define configSUPPORT_STATIC_ALLOCATION         0
+#define configSUPPORT_DYNAMIC_ALLOCATION        1
+
+/* Hook function related definitions. */
+#define configUSE_IDLE_HOOK                    0
+#define configUSE_TICK_HOOK                    0
+#define configUSE_MALLOC_FAILED_HOOK           0 // cause nested extern warning
+#define configCHECK_FOR_STACK_OVERFLOW         2
+
+/* Run time and task stats gathering related definitions. */
+#define configGENERATE_RUN_TIME_STATS          0
+#define configRECORD_STACK_HIGH_ADDRESS        1
+#define configUSE_TRACE_FACILITY               1 // legacy trace
+#define configUSE_STATS_FORMATTING_FUNCTIONS   0
+
+/* Co-routine definitions. */
+#define configUSE_CO_ROUTINES                  0
+#define configMAX_CO_ROUTINE_PRIORITIES        2
+
+/* Software timer related definitions. */
+#define configUSE_TIMERS                       1
+#define configTIMER_TASK_PRIORITY              (configMAX_PRIORITIES-2)
+#define configTIMER_QUEUE_LENGTH               32
+#define configTIMER_TASK_STACK_DEPTH           configMINIMAL_STACK_SIZE
+
+/* Optional functions - most linkers will remove unused functions anyway. */
+#define INCLUDE_vTaskPrioritySet               0
+#define INCLUDE_uxTaskPriorityGet              0
+#define INCLUDE_vTaskDelete                    0
+#define INCLUDE_vTaskSuspend                   1 // required for queue, semaphore, mutex to be blocked indefinitely with portMAX_DELAY
+#define INCLUDE_xResumeFromISR                 0
+#define INCLUDE_vTaskDelayUntil                1
+#define INCLUDE_vTaskDelay                     1
+#define INCLUDE_xTaskGetSchedulerState         0
+#define INCLUDE_xTaskGetCurrentTaskHandle      1
+#define INCLUDE_uxTaskGetStackHighWaterMark    0
+#define INCLUDE_xTaskGetIdleTaskHandle         0
+#define INCLUDE_xTimerGetTimerDaemonTaskHandle 0
+#define INCLUDE_pcTaskGetTaskName              0
+#define INCLUDE_eTaskGetState                  0
+#define INCLUDE_xEventGroupSetBitFromISR       0
+#define INCLUDE_xTimerPendFunctionCall         0
+
+/* Define to trap errors during development. */
+// Halt CPU (breakpoint) when hitting error, only apply for Cortex M3, M4, M7
+#if defined(__ARM_ARCH_7M__) || defined (__ARM_ARCH_7EM__)
+  #define configASSERT(_exp) \
+    do {\
+      if ( !(_exp) ) { \
+        volatile uint32_t* ARM_CM_DHCSR =  ((volatile uint32_t*) 0xE000EDF0UL); /* Cortex M CoreDebug->DHCSR */ \
+        if ( (*ARM_CM_DHCSR) & 1UL ) {  /* Only halt mcu if debugger is attached */ \
+          taskDISABLE_INTERRUPTS(); \
+           __asm("BKPT #0\n"); \
+        }\
+      }\
+    } while(0)
+#else
+  #define configASSERT( x )
+#endif
+
+/* FreeRTOS hooks to NVIC vectors */
+#define xPortPendSVHandler    PendSV_Handler
+#define xPortSysTickHandler   SysTick_Handler
+#define vPortSVCHandler       SVC_Handler
+
+//--------------------------------------------------------------------+
+// Interrupt nesting behavior configuration.
+//--------------------------------------------------------------------+
+
+// For Cortex-M specific: __NVIC_PRIO_BITS is defined in mcu header
+#define configPRIO_BITS       2
+
+/* The lowest interrupt priority that can be used in a call to a "set priority" function. */
+#define configLIBRARY_LOWEST_INTERRUPT_PRIORITY			  ((1<<configPRIO_BITS) - 1)
+
+/* The highest interrupt priority that can be used by any interrupt service
+routine that makes calls to interrupt safe FreeRTOS API functions.  DO NOT CALL
+INTERRUPT SAFE FREERTOS API FUNCTIONS FROM ANY INTERRUPT THAT HAS A HIGHER
+PRIORITY THAN THIS! (higher priorities are lower numeric values. */
+#define configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY	2
+
+/* Interrupt priorities used by the kernel port layer itself.  These are generic
+to all Cortex-M ports, and do not rely on any particular library functions. */
+#define configKERNEL_INTERRUPT_PRIORITY 		          ( configLIBRARY_LOWEST_INTERRUPT_PRIORITY << (8 - configPRIO_BITS) )
+
+/* !!!! configMAX_SYSCALL_INTERRUPT_PRIORITY must not be set to zero !!!!
+See http://www.FreeRTOS.org/RTOS-Cortex-M3-M4.html. */
+#define configMAX_SYSCALL_INTERRUPT_PRIORITY 	        ( configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY << (8 - configPRIO_BITS) )
+
+#endif
diff --git a/hw/bsp/stm32g0/family.cmake b/hw/bsp/stm32g0/family.cmake
index 5fc9387e5..ddd39bc3b 100644
--- a/hw/bsp/stm32g0/family.cmake
+++ b/hw/bsp/stm32g0/family.cmake
@@ -120,6 +120,7 @@ function(family_configure_example TARGET)
     )
 
   #---------- Flash ----------
+  family_flash_stlink(${TARGET})
   family_flash_jlink(${TARGET})
 endfunction()
 

From dc3afdbf3b0520caa4a8147c08219486672a6832 Mon Sep 17 00:00:00 2001
From: hathach <thach@tinyusb.org>
Date: Thu, 1 Jun 2023 20:52:48 +0700
Subject: [PATCH 16/16] add note for B0 clock variant

---
 hw/bsp/stm32g0/boards/stm32g0b1nucleo/board.h | 4 ++++
 hw/bsp/stm32g0/family.cmake                   | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/hw/bsp/stm32g0/boards/stm32g0b1nucleo/board.h b/hw/bsp/stm32g0/boards/stm32g0b1nucleo/board.h
index 44c69934d..ae0820529 100644
--- a/hw/bsp/stm32g0/boards/stm32g0b1nucleo/board.h
+++ b/hw/bsp/stm32g0/boards/stm32g0b1nucleo/board.h
@@ -59,6 +59,7 @@
 // RCC Clock
 //--------------------------------------------------------------------+
 #if 1
+// Clock configure for STM32G0B1RE Nucleo
 static inline void board_clock_init(void)
 {
   RCC_OscInitTypeDef RCC_OscInitStruct = {0};
@@ -114,6 +115,9 @@ static inline void board_clock_init(void)
   HAL_RCC_OscConfig(&osc_hsi48);
 }
 #else
+
+// Clock configure for STM32G0 nucleo with B0 mcu variant for someone that is skilled enough
+// to rework and solder the B0 chip. Note: SB17 may need to be soldered as well (check user manual)
 static inline void board_clock_init(void)
 {
   RCC_OscInitTypeDef RCC_OscInitStruct = {0};
diff --git a/hw/bsp/stm32g0/family.cmake b/hw/bsp/stm32g0/family.cmake
index ddd39bc3b..9674bc759 100644
--- a/hw/bsp/stm32g0/family.cmake
+++ b/hw/bsp/stm32g0/family.cmake
@@ -121,7 +121,7 @@ function(family_configure_example TARGET)
 
   #---------- Flash ----------
   family_flash_stlink(${TARGET})
-  family_flash_jlink(${TARGET})
+  #family_flash_jlink(${TARGET})
 endfunction()