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  • # vim:ft=make
    #
    # Copyright 2021 Daniel Friesel
    #
    # SPDX-License-Identifier: BSD-2-Clause
    
    MCU = atmega32u4
    SERIAL_PORT ?= /dev/ttyUSB0
    
    ifdef CONFIG_arch_lora32u4ii_cpufreq
    	cpu_freq = ${CONFIG_arch_lora32u4ii_cpufreq}
    endif
    
    cpu_freq ?= 8000000
    
    COMMON_FLAGS += -Werror=overflow
    COMMON_FLAGS += -mmcu=${MCU} -DMULTIPASS_ARCH_lora32u4ii
    COMMON_FLAGS += -DF_CPU=${cpu_freq}UL
    COMMON_FLAGS += -DMULTIPASS_ARCH_HAS_I2C
    
    ifeq (${stack_usage}, )
    	COMMON_FLAGS += -flto
    endif
    
    CC = avr-gcc
    CXX = avr-g++
    NM = avr-nm
    OBJCOPY = avr-objcopy
    OBJDUMP = avr-objdump
    
    ARCH_SHORTNAME = avr
    
    ifeq (${aspectc}, 1)
    	CXX = ag++ -r build/repo.acp -v 0 --c_compiler avr-g++ -p . --Xcompiler
    endif
    
    CXX_TARGETS += src/arch/lora32u4ii/arch.cc
    CXX_TARGETS += src/arch/lora32u4ii/driver/gpio.cc
    CXX_TARGETS += src/arch/lora32u4ii/driver/stdout.cc
    
    # Command-line driver selection
    
    ifeq (${timer_s}, 1)
    	CONFIG_arch_lora32u4ii_driver_uptime = y
    endif
    
    
    ifneq ($(findstring adc,${arch_drivers}), )
    	CONFIG_arch_lora32u4ii_driver_adc = y
    endif
    
    
    ifneq ($(findstring spi,${arch_drivers}), )
    	CONFIG_arch_lora32u4ii_driver_spi = y
    endif
    
    
    # Kconfig driver selection
    
    
    ifdef CONFIG_arch_lora32u4ii_driver_adc
    	CXX_TARGETS += src/arch/lora32u4ii/driver/adc.cc
    endif
    
    
    ifdef CONFIG_arch_lora32u4ii_driver_spi
    	CXX_TARGETS += src/arch/lora32u4ii/driver/spi.cc
    endif
    
    
    ifdef CONFIG_arch_lora32u4ii_driver_uptime
    	COMMON_FLAGS += -DTIMER_S
    	CXX_TARGETS += src/arch/lora32u4ii/driver/uptime.cc
    endif
    
    ifeq (${cpu_freq}, 8000000)
    	uart_baud = 19200
    else ifeq (${cpu_freq}, 4000000)
    	uart_baud = 19200
    else ifeq (${cpu_freq}, 2000000)
    	uart_baud = 19200
    else ifeq (${cpu_freq}, 1000000)
    	uart_baud = 9600
    else ifeq (${cpu_freq}, 500000)
    	uart_baud = 4800
    else ifeq (${cpu_freq}, 250000)
    	uart_baud = 2400
    else ifeq (${cpu_freq}, 125000)
    	uart_baud = 1200
    else ifeq (${cpu_freq}, 62500)
    	uart_baud = 300
    else
    	uart_baud = 9600
    endif
    
    COMMON_FLAGS += -DBAUD=${uart_baud}UL
    
    OBJECTS = ${CXX_TARGETS:.cc=.o} ${C_TARGETS:.c=.o}
    
    %.o : %.cc | include/config.h
    	${QUIET}${CXX} ${INCLUDES} ${COMMON_FLAGS} ${CXXFLAGS} -c -o $@ ${@:.o=.cc}
    
    %.o : %.c | include/config.h
    	${QUIET}${CC} ${INCLUDES} ${COMMON_FLAGS} ${CFLAGS} -c -o $@ ${@:.o=.c}
    
    build/system.elf: ${OBJECTS}
    	${QUIET}mkdir -p build
    	${QUIET}${CXX} ${COMMON_FLAGS} ${CXXFLAGS} -Wl,--gc-sections -o $@ ${OBJECTS}
    	${QUIET}avr-size --format=avr --mcu=${MCU} $@
    	${QUIET}test $$(avr-size --format=avr --mcu=${MCU} build/system.elf | fgrep Program | grep -o '[0-9.]*%' | cut -d . -f 1) -lt 100
    
    build/system.hex: build/system.elf
    	${QUIET}${OBJCOPY} -O ihex ${@:.hex=.elf} $@
    
    program: build/system.hex
    	${QUIET}avrdude -p ${MCU} -c usbasp -U flash:w:build/system.hex
    
    arch_clean:
    	${QUIET}rm -f ${OBJECTS} build/system.hex
    
    cat:
    	${QUIET}script/cat.py ${SERIAL_PORT} ${uart_baud} ${cpu_freq} 65536
    
    monitor:
    	${QUIET}screen ${SERIAL_PORT} ${uart_baud}
    
    size: build/system.elf
    	${QUIET}avr-size --format=avr --mcu=${MCU} build/system.elf | fgrep Program | perl -nE 'if (m{(\d+) bytes \(([0-9.]+%)}) { print("$$1;$$2;") }'
    	${QUIET}avr-size --format=avr --mcu=${MCU} build/system.elf | fgrep Data | perl -nE 'if (m{(\d+) bytes \(([0-9.]+%)}) { print("$$1;$$2;") }'
    	${QUIET}echo
    
    arch_help:
    	@echo "lora32u4ii specific flags:"
    	@echo " SERIAL_PORT = ${SERIAL_PORT}"
    
    arch_info:
    	@echo "CPU   Freq: ${cpu_freq} Hz"
    	@echo "Timer Freq: ${timer_freq} Hz"
    	@echo "I2C   Freq: ${i2c_freq} Hz"
    	@echo "Counter Overflow: 65536/255"
    	@echo "Monitor: ${SERIAL_PORT} ${uart_baud}"
    
    .PHONY: arch_clean arch_help arch_info monitor program