# CMake version
cmake_minimum_required(VERSION 3.10)

project(fanddevice C CXX ASM)

set(MCU "attiny3226")
set(CPU_SPEED "16500000")
message(STATUS "${CPU_SPEED}")

set(SRC_FILES
	main.cpp
	usbdrv/usbdrvasm.S
	usbdrv/usbdrv.c
	usbdrv/oddebug.c
	)

set(CMAKE_C_COMPILER /usr/bin/avr-gcc)
set(CMAKE_CXX_COMPILER /usr/bin/avr-g++)
set(CMAKE_ASM_COMPILER /usr/bin/avr-gcc)
set(CMAKE_OBJCOPY /usr/bin/avr-objcopy)
set(CMAKE_OBJDUMP /usr/bin/avr-objdump)
set(CMAKE_RANLIB /usr/bin/avr-ranlib)
set(CMAKE_LINKER /usr/bin/avr-ld)

add_definitions(-mmcu=${MCU} -DF_CPU=${CPU_SPEED} -c -g -Os -flto -ffunction-sections -fdata-sections)
set(CMAKE_CXX_FLAGS "-std=c++17 -fno-exceptions -fno-strict-aliasing -fno-rtti")
set(CMAKE_C_FLAGS "")

set(CMAKE_SHARED_LIBRARY_LINK_C_FLAGS "")   # remove -rdynamic for C
set(CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS "") # remove -rdynamic for CXX
set(CMAKE_SHARED_LIBRARY_LINK_ASM_FLAGS "") # remove -rdynamic for ASM
set(CMAKE_EXE_LINKER_FLAGS "-s -Os -Wl,--gc-sections -mmcu=${MCU}")

add_executable(${PROJECT_NAME} ${SRC_FILES})

find_program(AR_AVRDUDE NAMES avrdude PATHS /usr/bin NO_DEFAULT_PATH)
find_program(AR_AVRSIZE NAMES avr-size PATHS /usr/bin NO_DEFAULT_PATH)

add_custom_target(export
COMMAND ${CMAKE_OBJCOPY} -j .text -j .data -O ihex ${PROJECT_NAME} ${PROJECT_NAME}.hex
COMMAND ${AR_AVRSIZE} -C ${PROJECT_NAME}
DEPENDS ${PROJECT_NAME}
)

add_custom_target(download
COMMAND ${AR_AVRDUDE} -c serialupdi -P /dev/ttyUSB0 -p t3226 -B 1 -U flash:w:${PROJECT_NAME}.hex
DEPENDS export
)

add_custom_target(fuses  
COMMAND ${AR_AVRDUDE} -c serialupdi -P /dev/ttyUSB0 -p t3226 -B 1 -U osccfg:w:0x01:m -U syscfg0:w:0xF7:m
)

target_include_directories(${PROJECT_NAME} PRIVATE ./usbdrv)