generating tones with libpca

beep_libpca.c

#include "pca.h"

int main(void)
{
	// initialize timer 0 as a tone generator
	// TDELAY_IMPLEMENT_T0_INT must be set to 1 in config.h
	beeper_init(E_TIMER0);

	for (uint8_t i = 0; i < 10; i++) {
		// start generating tone with timer 0, of frequency (440 + (110*i)),
		// lasting 300 ms
		beeper_beep(E_TIMER0, 440 + (100*i), 300);

		// wait until tone generation is finished
		beeper_block(E_TIMER0);
	}

	return 0;
}

Makefile

TARGET=beep_libpca
SOURCES=beep_libpca.c

DEPS=
COBJ=$(SOURCES:.c=.o)
PCA_PREFIX=../pca

CC=avr-gcc
OBJC=avr-objcopy
MCU=atmega328p
CFLAGS=-I. -I$(PCA_PREFIX)/include/ -Wall -Os -DF_CPU=16000000UL -std=c99
LDFLAGS=-lpca -L$(PCA_PREFIX)

ISPPORT=/dev/ttyACM0
ISPDIR=/usr/share/arduino/hardware/tools
ISP=$(ISPDIR)/avrdude
ISPFLAGS=-c arduino -p $(MCU) -P $(ISPPORT) -b 115200 -C $(ISPDIR)/avrdude.conf 

all: $(TARGET)

%.o: %.c $(DEPS)
	@echo -e "\tCC" $<
	@$(CC) -mmcu=$(MCU) -c -o $@ $< $(CFLAGS)

libpca.a:
	@echo -e "\tBUILDING PURE C ARDUINO LIB"
	$(MAKE) -C $(PCA_PREFIX)

$(TARGET): $(COBJ) libpca.a
	@echo -e "\tLINKING CC" $<
	@$(CC) -mmcu=$(MCU) -o $(TARGET) $(COBJ) $(LDFLAGS)
	$(OBJC) -O ihex -R .eeprom $(TARGET) $(TARGET).hex
	$(OBJC) -O binary -R .eeprom $(TARGET) $(TARGET).bin

clean:
	$(MAKE) -C $(PCA_PREFIX) clean
	@echo ========== cleanup ========== 
	rm -rf *.o *.bin *.hex $(TARGET)	

read:
	$(ISP) $(ISPFLAGS) -U flash:r:$(TARGET)_backup.hex:i

install:
	$(ISP) $(ISPFLAGS) -U flash:w:$(TARGET).hex