SET(CMAKE_C_FLAGS "-mthumb -DTHUMB_NO_INTERWORKING -DTHUMB_PRESENT -falign-functions=16 -mcpu=cortex-m0 -Wall -std=c11 -ffunction-sections -fdata-sections -fomit-frame-pointer -fno-unroll-loops -ffast-math -ftree-vectorize -mno-thumb-interwork -fno-common -flto" CACHE INTERNAL "c compiler flags")
SET(CMAKE_CXX_FLAGS "-mthumb -mcpu=cortex-m0 -DTHUMB_NO_INTERWORKING -DTHUMB_PRESENT -falign-functions=16  -Wall -std=c++11 -ffunction-sections -fdata-sections -fomit-frame-pointer -fno-unroll-loops -ffast-math -ftree-vectorize -mno-thumb-interwork -fno-common -flto" CACHE INTERNAL "cxx compiler flags")
SET(CMAKE_ASM_FLAGS "-x assembler-with-cpp -mthumb -mcpu=cortex-m0 -DTHUMB_NO_INTERWORKING -mno-thumb-interwork" CACHE INTERNAL "asm compiler flags")

SET(CMAKE_EXE_LINKER_FLAGS "-mthumb -Wl,--gc-sections -mcpu=cortex-m0 -mno-thumb-interwork -falign-functions=16 -ffunction-sections -fno-common -fdata-sections -fomit-frame-pointer -flto" CACHE INTERNAL "executable linker flags")
SET(CMAKE_MODULE_LINKER_FLAGS "-mno-thumb-interwork -mcpu=cortex-m0" CACHE INTERNAL "module linker flags")
SET(CMAKE_SHARED_LINKER_FLAGS "-mno-thumb-interwork -mcpu=cortex-m0" CACHE INTERNAL "shared linker flags")

SET(STM32_CHIP_TYPES 063x8 051x6 CACHE INTERNAL "stm32f0 chip types")
SET(STM32_CODES "063.8" "051.6")

MACRO(STM32_GET_CHIP_TYPE CHIP CHIP_TYPE)
    STRING(REGEX REPLACE "^[sS][tT][mM]32[lL]((063.8)|(04[28].[46])|(05[18].[468])|(07[0128].[68B])|(09[18].[BC])).+$" "\\1" STM32_CODE ${CHIP})
    SET(INDEX 0)
    FOREACH(C_TYPE ${STM32_CHIP_TYPES})
        LIST(GET STM32_CODES ${INDEX} CHIP_TYPE_REGEXP)
        IF(STM32_CODE MATCHES ${CHIP_TYPE_REGEXP})
            SET(RESULT_TYPE ${C_TYPE})
        ENDIF()
        MATH(EXPR INDEX "${INDEX}+1")
    ENDFOREACH()
    SET(${CHIP_TYPE} ${RESULT_TYPE})
ENDMACRO()

MACRO(STM32_GET_CHIP_PARAMETERS CHIP FLASH_SIZE RAM_SIZE)
    STRING(REGEX REPLACE "^[sS][tT][mM]32[lL](0[65][1345]).[468BC]" "\\1" STM32_CODE ${CHIP})
    STRING(REGEX REPLACE "^[sS][tT][mM]32[lL]0[56][1345].([468BC])" "\\1" STM32_SIZE_CODE ${CHIP})

    IF(STM32_SIZE_CODE STREQUAL "4")
        SET(FLASH "16K")
    ELSEIF(STM32_SIZE_CODE STREQUAL "6")
        SET(FLASH "32K")
    ELSEIF(STM32_SIZE_CODE STREQUAL "8")
        SET(FLASH "64K")
    ELSEIF(STM32_SIZE_CODE STREQUAL "B")
        SET(FLASH "128K")
    ELSEIF(STM32_SIZE_CODE STREQUAL "C")
        SET(FLASH "256K")
    ENDIF()

    STM32_GET_CHIP_TYPE(${CHIP} TYPE)

    IF(${TYPE} STREQUAL 063x8)
        SET(RAM "8K")
    ELSEIF(${TYPE} STREQUAL 051x6)
        SET(RAM "8K")
    ENDIF()

    SET(${FLASH_SIZE} ${FLASH})
    SET(${RAM_SIZE} ${RAM})
ENDMACRO()

FUNCTION(STM32_SET_CHIP_DEFINITIONS TARGET CHIP_TYPE)
    LIST(FIND STM32_CHIP_TYPES ${CHIP_TYPE} TYPE_INDEX)
    IF(TYPE_INDEX EQUAL -1)
        MESSAGE(FATAL_ERROR "Invalid/unsupported STM32F0 chip type: ${CHIP_TYPE}")
    ENDIF()
    GET_TARGET_PROPERTY(TARGET_DEFS ${TARGET} COMPILE_DEFINITIONS)
    IF(TARGET_DEFS)
        SET(TARGET_DEFS "STM32L0;STM32L${CHIP_TYPE};${TARGET_DEFS}")
    ELSE()
        SET(TARGET_DEFS "STM32L0;STM32L${CHIP_TYPE}")
    ENDIF()
    SET_TARGET_PROPERTIES(${TARGET} PROPERTIES COMPILE_DEFINITIONS "${TARGET_DEFS}")
ENDFUNCTION()