cmake_minimum_required(VERSION 3.13)

# Project
project(lezyne-rear-light-firmware C)

# MCU and clock
set(MCU attiny202)
set(F_CPU 5000000UL) # 5 MHz

# Toolchain executables
set(CMAKE_SYSTEM_NAME Generic)
set(CMAKE_C_COMPILER avr-gcc)
set(OBJCOPY avr-objcopy)

# Compiler flags: optimize, warnings, treat warnings as errors
set(CMAKE_C_FLAGS "-mmcu=${MCU} -DF_CPU=${F_CPU} -Os -Wall -Werror")

# Sources
add_executable(main.elf main.c)

# HEX file
add_custom_command(
    OUTPUT main.hex
    COMMAND ${OBJCOPY} -O ihex -R .eeprom main.elf main.hex
    DEPENDS main.elf
)

# BIN file
add_custom_command(
    OUTPUT main.bin
    COMMAND ${OBJCOPY} -O binary -R .eeprom main.elf main.bin
    DEPENDS main.elf
)

# Targets
add_custom_target(hex ALL DEPENDS main.hex)
add_custom_target(bin ALL DEPENDS main.bin)