From b2dc419270d17f100ec04cd18e764fe66d298f77 Mon Sep 17 00:00:00 2001
From: hathach <thach@tinyusb.org>
Date: Wed, 19 Nov 2025 13:36:32 +0700
Subject: [PATCH] rename CFG_TUD_ENDPOINT0_BUFSIZE to make it more consistent
 use uint8_t for dfu state and status to reduce size

---
 src/class/dfu/dfu_device.c | 10 ++++------
 src/device/usbd_control.c  |  8 ++++----
 src/tusb_option.h          |  4 ++--
 3 files changed, 10 insertions(+), 12 deletions(-)

diff --git a/src/class/dfu/dfu_device.c b/src/class/dfu/dfu_device.c
index ffe5941e8..d3cc53918 100644
--- a/src/class/dfu/dfu_device.c
+++ b/src/class/dfu/dfu_device.c
@@ -50,19 +50,17 @@
 typedef struct {
   uint8_t attrs;
   uint8_t alt;
+  uint8_t state;
+  uint8_t status;
 
-  dfu_state_t state;
-  dfu_status_t status;
-
-  bool flashing_in_progress;
+  bool     flashing_in_progress;
   uint16_t block;
   uint16_t length;
 } dfu_state_ctx_t;
 
-// Only a single dfu state is allowed
 static dfu_state_ctx_t _dfu_ctx;
 
-CFG_TUD_MEM_ALIGN uint8_t _transfer_buf[CFG_TUD_DFU_XFER_BUFSIZE];
+TU_ATTR_ALIGNED(4) uint8_t _transfer_buf[CFG_TUD_DFU_XFER_BUFSIZE];
 
 static void reset_state(void) {
   _dfu_ctx.state = DFU_IDLE;
diff --git a/src/device/usbd_control.c b/src/device/usbd_control.c
index 745530f69..996e7387f 100644
--- a/src/device/usbd_control.c
+++ b/src/device/usbd_control.c
@@ -60,7 +60,7 @@ typedef struct {
 static usbd_control_xfer_t _ctrl_xfer;
 
 CFG_TUD_MEM_SECTION static struct {
-  TUD_EPBUF_DEF(buf, CFG_TUD_EP0_BUFSIZE);
+  TUD_EPBUF_DEF(buf, CFG_TUD_ENDPOINT0_BUFSIZE);
 } _ctrl_epbuf;
 
 //--------------------------------------------------------------------+
@@ -88,13 +88,13 @@ bool tud_control_status(uint8_t rhport, const tusb_control_request_t* request) {
 // Each transaction has up to Endpoint0's max packet size.
 // This function can also transfer an zero-length packet
 static bool data_stage_xact(uint8_t rhport) {
-  const uint16_t xact_len = tu_min16(_ctrl_xfer.data_len - _ctrl_xfer.total_xferred, CFG_TUD_EP0_BUFSIZE);
+  const uint16_t xact_len = tu_min16(_ctrl_xfer.data_len - _ctrl_xfer.total_xferred, CFG_TUD_ENDPOINT0_BUFSIZE);
   uint8_t ep_addr = EDPT_CTRL_OUT;
 
   if (_ctrl_xfer.request.bmRequestType_bit.direction == TUSB_DIR_IN) {
     ep_addr = EDPT_CTRL_IN;
     if (0u != xact_len) {
-      TU_VERIFY(0 == tu_memcpy_s(_ctrl_epbuf.buf, CFG_TUD_EP0_BUFSIZE, _ctrl_xfer.buffer, xact_len));
+      TU_VERIFY(0 == tu_memcpy_s(_ctrl_epbuf.buf, CFG_TUD_ENDPOINT0_BUFSIZE, _ctrl_xfer.buffer, xact_len));
     }
   }
 
@@ -179,7 +179,7 @@ bool usbd_control_xfer_cb(uint8_t rhport, uint8_t ep_addr, xfer_result_t result,
   // Data Stage is complete when all request's length are transferred or
   // a short packet is sent including zero-length packet.
   if ((_ctrl_xfer.request.wLength == _ctrl_xfer.total_xferred) ||
-      (xferred_bytes < CFG_TUD_EP0_BUFSIZE)) {
+      (xferred_bytes < CFG_TUD_ENDPOINT0_BUFSIZE)) {
     // DATA stage is complete
     bool is_ok = true;
 
diff --git a/src/tusb_option.h b/src/tusb_option.h
index 4937b2502..eed14214d 100644
--- a/src/tusb_option.h
+++ b/src/tusb_option.h
@@ -485,8 +485,8 @@
   #define CFG_TUD_ENDPOINT0_SIZE  64
 #endif
 
-#ifndef CFG_TUD_EP0_BUFSIZE
-  #define CFG_TUD_EP0_BUFSIZE  CFG_TUD_ENDPOINT0_SIZE
+#ifndef CFG_TUD_ENDPOINT0_BUFSIZE
+  #define CFG_TUD_ENDPOINT0_BUFSIZE  CFG_TUD_ENDPOINT0_SIZE
 #endif
 
 #ifndef CFG_TUD_INTERFACE_MAX