INCLUDE(CMakeForceCompiler)

SET(STM32_SUPPORTED_FAMILIES F1 F4 CACHE INTERNAL "stm32 supported families")

IF(NOT TOOLCHAIN_PREFIX)
     SET(TOOLCHAIN_PREFIX "/usr")
     MESSAGE(STATUS "No TOOLCHAIN_PREFIX specified, using default: " ${TOOLCHAIN_PREFIX})
ENDIF()

IF(NOT TARGET_TRIPLET)
    SET(TARGET_TRIPLET "arm-none-eabi")
    MESSAGE(STATUS "No TARGET_TRIPLET specified, using default: " ${TARGET_TRIPLET})
ENDIF()

IF(NOT STM32_FAMILY)
    MESSAGE(STATUS "No STM32_FAMILY specified, trying to get it from STM32_CHIP")
    IF(NOT STM32_CHIP)
        SET(STM32_FAMILY "F1" CACHE INTERNAL "stm32 family")
        MESSAGE(STATUS "Neither STM32_FAMILY nor STM32_CHIP specified, using default STM32_FAMILY: ${STM32_FAMILY}")
    ELSE()
        STRING(REGEX REPLACE "^[sS][tT][mM]32(([fF][0-4])|([lL][0-1])|([tT])|([wW])).+$" "\\1" STM32_FAMILY ${STM32_CHIP})
        STRING(TOUPPER ${STM32_FAMILY} STM32_FAMILY)
        MESSAGE(STATUS "Selected STM32 family: ${STM32_FAMILY}")
    ENDIF()
ENDIF()

STRING(TOUPPER ${STM32_FAMILY} STM32_FAMILY)
LIST(FIND STM32_SUPPORTED_FAMILIES ${STM32_FAMILY} FAMILY_INDEX)
IF(FAMILY_INDEX EQUAL -1)
    MESSAGE(FATAL_ERROR "Invalid/unsupported STM32 family: ${STM32_FAMILY}")
ENDIF()

SET(TOOLCHAIN_BIN_DIR ${TOOLCHAIN_PREFIX}/bin)
SET(TOOLCHAIN_INC_DIR ${TOOLCHAIN_PREFIX}/${TARGET_TRIPLET}/include)
SET(TOOLCHAIN_LIB_DIR ${TOOLCHAIN_PREFIX}/${TARGET_TRIPLET}/lib)

SET(CMAKE_SYSTEM_NAME Generic)
SET(CMAKE_SYSTEM_PROCESSOR arm)

CMAKE_FORCE_C_COMPILER(${TOOLCHAIN_BIN_DIR}/${TARGET_TRIPLET}-gcc GNU)
CMAKE_FORCE_CXX_COMPILER(${TOOLCHAIN_BIN_DIR}/${TARGET_TRIPLET}-g++ GNU)
SET(CMAKE_ASM_COMPILER ${TOOLCHAIN_BIN_DIR}/${TARGET_TRIPLET}-gcc)

SET(CMAKE_OBJCOPY ${TOOLCHAIN_BIN_DIR}/${TARGET_TRIPLET}-objcopy CACHE INTERNAL "objcopy tool")
SET(CMAKE_OBJDUMP ${TOOLCHAIN_BIN_DIR}/${TARGET_TRIPLET}-objdump CACHE INTERNAL "objdump tool")

SET(CMAKE_C_FLAGS_DEBUG "-Og -g" CACHE INTERNAL "c compiler flags debug")
SET(CMAKE_CXX_FLAGS_DEBUG "-Og -g" CACHE INTERNAL "cxx compiler flags debug")
SET(CMAKE_ASM_FLAGS_DEBUG "-g" CACHE INTERNAL "asm compiler flags debug")

SET(CMAKE_C_FLAGS_RELEASE "-Os" CACHE INTERNAL "c compiler flags release")
SET(CMAKE_CXX_FLAGS_RELEASE "-Os" CACHE INTERNAL "cxx compiler flags release")
SET(CMAKE_ASM_FLAGS_RELEASE "" CACHE INTERNAL "asm compiler flags release")

SET(CMAKE_FIND_ROOT_PATH ${TOOLCHAIN_PREFIX}/${TARGET_TRIPLET})
SET(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
SET(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
SET(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)

FUNCTION(STM32_ADD_HEX_BIN_TARGETS TARGET)
    ADD_CUSTOM_TARGET(${TARGET}.hex DEPENDS ${TARGET} COMMAND ${CMAKE_OBJCOPY} -Oihex ${TARGET} ${TARGET}.hex)
    ADD_CUSTOM_TARGET(${TARGET}.bin DEPENDS ${TARGET} COMMAND ${CMAKE_OBJCOPY} -Obinary ${TARGET} ${TARGET}.bin)
ENDFUNCTION()

STRING(TOLOWER ${STM32_FAMILY} STM32_FAMILY_LOWER)
INCLUDE(${CMAKE_CURRENT_LIST_DIR}/gcc_stm32${STM32_FAMILY_LOWER}.cmake)