include_guard()

set(ST_FAMILY u0)
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)

# include board specific
include(${CMAKE_CURRENT_LIST_DIR}/boards/${BOARD}/board.cmake)

# toolchain set up
set(CMAKE_SYSTEM_CPU cortex-m0plus CACHE INTERNAL "System Processor")
set(CMAKE_TOOLCHAIN_FILE ${TOP}/examples/build_system/cmake/toolchain/arm_${TOOLCHAIN}.cmake)

set(FAMILY_MCUS STM32U0 CACHE INTERNAL "")


#------------------------------------
# Startup & Linker script
#------------------------------------
string(REPLACE "stm32u" "STM32U" MCU_VARIANT_UPPER ${MCU_VARIANT})
set(STARTUP_FILE_GNU ${ST_CMSIS}/Source/Templates/gcc/startup_${MCU_VARIANT}.s)
set(STARTUP_FILE_Clang ${STARTUP_FILE_GNU})
set(STARTUP_FILE_IAR ${ST_CMSIS}/Source/Templates/iar/startup_${MCU_VARIANT}.s)
if (NOT DEFINED LD_FILE_GNU)
  set(LD_FILE_GNU ${CMAKE_CURRENT_LIST_DIR}/linker/${MCU_VARIANT_UPPER}_FLASH.ld)
endif ()
set(LD_FILE_Clang ${LD_FILE_GNU})
if (NOT DEFINED LD_FILE_IAR)
  set(LD_FILE_IAR ${ST_CMSIS}/Source/Templates/iar/linker/${MCU_VARIANT}_flash.icf)
endif ()

#------------------------------------
# BOARD_TARGET
#------------------------------------
function(family_add_board 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_gpio.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_uart.c
    ${ST_HAL_DRIVER}/Src/${ST_PREFIX}_hal_uart_ex.c
    )
  target_include_directories(${BOARD_TARGET} PUBLIC
    ${CMAKE_CURRENT_FUNCTION_LIST_DIR}
    ${CMSIS_5}/CMSIS/Core/Include
    ${ST_CMSIS}/Include
    ${ST_HAL_DRIVER}/Inc
    )
  update_board(${BOARD_TARGET})
endfunction()

#------------------------------------
# Functions
#------------------------------------
function(family_configure_example TARGET RTOS)
  family_configure_common(${TARGET} ${RTOS})
  family_add_tinyusb(${TARGET} OPT_MCU_STM32U0)

  target_sources(${TARGET} PUBLIC
    ${CMAKE_CURRENT_FUNCTION_LIST_DIR}/family.c
    ${CMAKE_CURRENT_FUNCTION_LIST_DIR}/../board.c
    ${TOP}/src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c
    ${TOP}/src/portable/st/stm32_fsdev/fsdev_common.c
    ${STARTUP_FILE_${CMAKE_C_COMPILER_ID}}
    )
  target_include_directories(${TARGET} PUBLIC
    ${CMAKE_CURRENT_FUNCTION_LIST_DIR}
    ${CMAKE_CURRENT_FUNCTION_LIST_DIR}/../../
    ${CMAKE_CURRENT_FUNCTION_LIST_DIR}/boards/${BOARD}
    )

  if (CMAKE_C_COMPILER_ID STREQUAL "GNU")
    target_link_options(${TARGET} PUBLIC
      "LINKER:--script=${LD_FILE_GNU}"
      -nostartfiles
      --specs=nosys.specs --specs=nano.specs
      )
  elseif (CMAKE_C_COMPILER_ID STREQUAL "Clang")
    target_link_options(${TARGET} PUBLIC
      "LINKER:--script=${LD_FILE_Clang}"
      )
  elseif (CMAKE_C_COMPILER_ID STREQUAL "IAR")
    target_link_options(${TARGET} PUBLIC
      "LINKER:--config=${LD_FILE_IAR}"
      )
  endif ()

  if (CMAKE_C_COMPILER_ID STREQUAL "GNU" OR CMAKE_C_COMPILER_ID STREQUAL "Clang")
    set_source_files_properties(${CMAKE_CURRENT_FUNCTION_LIST_DIR}/family.c PROPERTIES COMPILE_FLAGS "-Wno-missing-prototypes")
  endif ()
  set_source_files_properties(${STARTUP_FILE_${CMAKE_C_COMPILER_ID}} PROPERTIES
    SKIP_LINTING ON
    COMPILE_OPTIONS -w)


  # Flashing
  family_add_bin_hex(${TARGET})
  family_flash_stlink(${TARGET})
  family_flash_jlink(${TARGET})
endfunction()
