add_executable(i2c1.elf i2c1.cpp
        ${PLAYGROUND_DIR}/src/init_low.s ${PLAYGROUND_DIR}/src/init_high.cpp ${PLAYGROUND_DIR}/include/init_high.h
        ${PLAYGROUND_DIR}/include/playground.h
        ${PLAYGROUND_DIR}/src/debug.cpp ${PLAYGROUND_DIR}/include/debug.h
        ${PLAYGROUND_DIR}/include/stm32f10x_conf.h
        # http://www.sparetimelabs.com/tinyprintf/tinyprintf.php
        ${TINYPRINTF_DIR}/tinyprintf.c ${TINYPRINTF_DIR}/tinyprintf.h
        ${STM32F10X_STDPERIPH_LIB}/Libraries/CMSIS/CM3/CoreSupport/core_cm3.c
        ${STM32F10X_STDPERIPH_LIB}/Libraries/CMSIS/CM3/DeviceSupport/ST/STM32F10x/system_stm32f10x.c
        ${STM32F10X_STDPERIPH_LIB}/Libraries/STM32F10x_StdPeriph_Driver/src/stm32f10x_rcc.c
        ${STM32F10X_STDPERIPH_LIB}/Libraries/STM32F10x_StdPeriph_Driver/src/stm32f10x_gpio.c
        ${STM32F10X_STDPERIPH_LIB}/Libraries/STM32F10x_StdPeriph_Driver/src/stm32f10x_i2c.c
        )

target_include_directories(i2c1.elf PUBLIC
        ${PLAYGROUND_DIR}/include
        ${TINYPRINTF_DIR}
        ${STM32F10X_STDPERIPH_LIB}/Libraries/CMSIS/CM3/CoreSupport
        ${STM32F10X_STDPERIPH_LIB}/Libraries/CMSIS/CM3/DeviceSupport/ST/STM32F10x
        ${STM32F10X_STDPERIPH_LIB}/Libraries/STM32F10x_StdPeriph_Driver/inc)
target_compile_definitions(i2c1.elf PUBLIC ${STM32F10X_STDPERIPH_DEFINES} USE_FULL_ASSERT)

set_target_properties(i2c1.elf PROPERTIES O_LEVEL 3)

#set_source_files_properties(i2c1.cpp PROPERTIES O_LEVEL s)
set_property(SOURCE i2c1.cpp APPEND_STRING PROPERTY COMPILE_FLAGS "-O0")

set_target_properties(i2c1.elf PROPERTIES LINK_FLAGS "-nostartfiles -T${CMAKE_SOURCE_DIR}/cmake/stm32.ld")
add_extra_commands(i2c1.elf)