cmake_minimum_required(VERSION 3.5)

project(refOvenTest)

enable_language(C ASM)
set(CMAKE_SYSTEM_NAME Generic)
set(CMAKE_SYSTEM_PROCESSOR arm)
set(CMAKE_CROSSCOMPILING TRUE)

#define th global variables for CMAKE to use for this project. 
set(LINKER startup/STM32F042K6Tx_FLASH.ld)
set(STARTUP startup/startup_stm32f042x6.s)
set(CPU_MCU "-mcpu=cortex-m0")


set(CMAKE_C_COMPILER "/usr/bin/arm-none-eabi-gcc")
#The reason that we use arm-none-eabi-gcc is that we will invoke c before hte assemly. 
#Check $<$<COMPILE_LANGUAGE:ASM>:-x assembler-with-cpp ${ASM_FLAGS}>
set(CMAKE_ASM_COMPILER "/usr/bin/arm-none-eabi-gcc")
set(CMAKE_OBJCOPY "usr/bin/arm-none-eabi-objcopy")

set(EXECUTABLE ${PROJECT_NAME}.out)

set(C_SOURCES
	Src/main.c 
	Src/stm32f0xx_it.c 
	Drivers/STM32F0xx_HAL_Driver/Src/stm32f0xx_ll_exti.c 
	Drivers/STM32F0xx_HAL_Driver/Src/stm32f0xx_ll_rcc.c 
	Drivers/STM32F0xx_HAL_Driver/Src/stm32f0xx_ll_utils.c 
	Src/system_stm32f0xx.c 
	Drivers/STM32F0xx_HAL_Driver/Src/stm32f0xx_ll_gpio.c 
	Drivers/STM32F0xx_HAL_Driver/Src/stm32f0xx_ll_pwr.c)

set(C_HEADERS
	Inc/main.h
	Inc/stm32_assert.h
	Inc/stm32f0xx_it.h)

set(ASM_SOURCES ${STARTUP})

add_executable(${EXECUTABLE} ${C_SOURCES} ${C_HEADERS} ${ASM_SOURCES})

#This is the whol tick to handle the assenbl compiling. 
#We can't use arm-non-eabi-as because it can onaly hande macros. 
#So this Varible makes that whne the asembly compiling is called the -x assembler-with-cpp flag is used
target_compile_options(${EXECUTABLE} PRIVATE
    $<$<COMPILE_LANGUAGE:ASM>:-x assembler-with-cpp ${ASM_FLAGS}>
)

target_compile_options(${EXECUTABLE} PRIVATE
						${CPU_MCU}
						-mthumb
						-Wall 
						-fdata-sections 
						-ffunction-sections
						$<$<CONFIG:Debug>:-O -g -gdwarf-2>)

target_compile_definitions(${EXECUTABLE} PRIVATE
						-DUSE_FULL_LL_DRIVER 
						-DSTM32F042x6 
						-DHSE_VALUE=8000000 
						-DHSE_STARTUP_TIMEOUT=100 
						-DLSE_STARTUP_TIMEOUT=5000 
						-DLSE_VALUE=32768 
						-DHSI_VALUE=8000000 
						-DLSI_VALUE=40000 
						-DVDD_VALUE=3300 
						-DPREFETCH_ENABLE=1 
						-DINSTRUCTION_CACHE_ENABLE=0 
						-DDATA_CACHE_ENABLE=0)

target_include_directories(${EXECUTABLE} PRIVATE
							Inc 
							Drivers/STM32F0xx_HAL_Driver/Inc
							Drivers/CMSIS/Device/ST/STM32F0xx/Include
							Drivers/CMSIS/Include)

target_link_options(${EXECUTABLE} PRIVATE
					${CPU_MCU}
					-mthumb
					-specs=nano.specs
					-T${CMAKE_SOURCE_DIR}/${LINKER}
					-lc 
					-lm 
					-lnosys
					-Wl,-Map=${PROJECT_NAME}.map,--cref 
					-Wl,--gc-sections)

add_custom_command(TARGET ${EXECUTABLE}
        POST_BUILD
        COMMAND arm-none-eabi-size ${EXECUTABLE})

add_custom_command(TARGET ${EXECUTABLE}
        POST_BUILD
        COMMAND arm-none-eabi-objcopy -O ihex ${EXECUTABLE} ${PROJECT_NAME}.hex
        COMMAND arm-none-eabi-objcopy -O binary ${EXECUTABLE} ${PROJECT_NAME}.bin)