add timer-supported software i2c + arduino-nano timer

	COMMON_FLAGS += -DSOFTI2C_PULLUP

endif

ifeq (${softi2c_timer}, 1)

	arch_drivers += ,timer

	COMMON_FLAGS += -DSOFTI2C_TIMER

endif

ifeq (${kout_nop}, 1)

	COMMON_FLAGS += -DKOUT_NOP

endif

#include <avr/io.h>

#include <avr/interrupt.h>

#define ON_TIMER_INTERRUPT ISR(TIMER0_COMPA_vect)

class Timer {

	private:

		Timer(const Timer &copy);

	public:

		Timer() {}

		inline void setup(unsigned char const frequency) {

			OCR0A = frequency ? 255 / frequency : 1;

			TCCR0A = _BV(WGM01);

		}

		inline void start(unsigned char const interrupt) {

			TCNT0 = 0;

			TCCR0B = _BV(CS01) | _BV(CS00);

			if (interrupt) {

				TIMSK0 = _BV(OCIE0A);

			}

		}

		inline void stop() { TCCR0B = 0; TIMSK0 = 0; }

};

extern Timer timer;

# vim:ft=make

MCU = atmega168

PORT = /dev/ttyUSB0

BAUD = 19200

COMMON_FLAGS += -Werror=overflow

COMMON_FLAGS += -mmcu=${MCU} -DF_CPU=16000000UL -DMULTIPASS_ARCH_arduino_nano

COMMON_FLAGS += -flto

COMMON_FLAGS += -DMULTIPASS_ARCH_HAS_I2C

CC = avr-gcc

CXX = avr-g++

NM = avr-nm

OBJCOPY = avr-objcopy

OBJDUMP = avr-objdump

ifeq (${aspectc}, 1)

	CXX = ag++ -r build/repo.acp -v 0 --c_compiler avr-g++ -p . --Xcompiler

endif

TARGETS += src/arch/arduino-nano/arch.cc

TARGETS += src/arch/arduino-nano/driver/gpio.cc

TARGETS += src/arch/arduino-nano/driver/stdout.cc

TARGETS += src/arch/arduino-nano/driver/uptime.cc

ifneq ($(findstring softi2c,${drivers}), )

else ifneq ($(findstring i2c,${arch_drivers}), )

	TARGETS += src/arch/arduino-nano/driver/i2c.cc

endif

ifneq ($(findstring stdin,${arch_drivers}), )

	TARGETS += src/arch/arduino-nano/driver/stdin.cc

endif

ifneq ($(findstring timer,${arch_drivers}), )

	TARGETS += src/arch/arduino-nano/driver/timer.cc

endif

ifneq (${i2c_freq}, )

	COMMON_FLAGS += -DF_I2C=${i2c_freq}

endif

ifneq (${timer_freq}, )

	COMMON_FLAGS += -DF_TIMER=${timer_freq}

endif

OBJECTS = ${TARGETS:.cc=.o}

.cc.o:

	${CXX} ${INCLUDES} ${COMMON_FLAGS} ${CXXFLAGS} -c -o $@ ${@:.o=.cc}

build/system.elf: ${OBJECTS}

	${CXX} ${COMMON_FLAGS} ${CXXFLAGS} -Wl,--gc-sections -o $@ ${OBJECTS}

	avr-size --format=avr --mcu=${MCU} $@

build/system.hex: build/system.elf

	${OBJCOPY} -O ihex ${@:.hex=.elf} $@

program: build/system.hex

	avrdude -p ${MCU} -c arduino -P ${PORT} -b ${BAUD} -U flash:w:build/system.hex

arch_clean:

	rm -f ${OBJECTS} build/system.hex

monitor:

	screen ${PORT} 115200

arch_help:

	@echo "arduino-nano specific flags:"

	@echo "    PORT = ${PORT}"

	@echo "    BAUD = ${BAUD} (only used for programming)"

.PHONY: arch_clean arch_help monitor program

../arduino-nano/arch.cc

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../arduino-nano/driver

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