#define BREAKOUT_CLEAR(x) ((x) | (0 << 8))
#define BREAKOUT_SET(x) ((x) | (1 << 8))

int breakout_set_pins(int fd, uint8_t mask)
{
	uint16_t val = BREAKOUT_SET(mask);
	return write(fd, &val, sizeof(val));
}

int breakout_clear_pins(int fd, uint8_t mask)
{
	uint16_t val = BREAKOUT_CLEARh(mask);
	return write(fd, &val, sizeof(val));
}

static void set(int fd, int n)
{
	uint16_t buf[2];
	if (n & 1) {
		buf[0] = BREAKOUT_CLEAR(0xff);
		buf[1] = BREAKOUT_SET(1 << n);
	} else {
		buf[0] = BREAKOUT_SET(0xff);
		buf[1] = BREAKOUT_CLEAR(1 << n);
	}
	write(fd, buf, sizeof(buf));
}

int main(int argc, char **argv)
{
	int fd, i;

	fd = open("/dev/breakout", O_RDWR);
        if (fd < 0) {
		perror("Failed to open /dev/breakout");
		exit(1);
	}

	while (1) {
		for (i = 0; i != LEDS-1; i++) {
			set(fd, i);
			usleep(DELAY_US);
		}#define BREAKOUT_CLEAR(x) ((x) | (0 << 8))
#define BREAKOUT_SET(x) ((x) | (1 << 8))

int breakout_set_pins(int fd, uint8_t mask)
{
	uint16_t val = BREAKOUT_SET(mask);
	return write(fd, &val, sizeof(val));
}

int breakout_clear_pins(int fd, uint8_t mask)
{
	uint16_t val = BREAKOUT_CLEARh(mask);
	return write(fd, &val, sizeof(val));
}

static void set(int fd, int n)
{
	uint16_t buf[2];
	if (n & 1) {
		buf[0] = BREAKOUT_CLEAR(0xff);
		buf[1] = BREAKOUT_SET(1 << n);
	} else {
		buf[0] = BREAKOUT_SET(0xff);
		buf[1] = BREAKOUT_CLEAR(1 << n);
	}
	write(fd, buf, sizeof(buf));
}

int main(int argc, char **argv)
{
	int fd, i;

	fd = open("/dev/breakout", O_RDWR);
        if (fd < 0) {
		perror("Failed to open /dev/breakout");
		exit(1);
	}

	while (1) {
		for (i = 0; i != LEDS-1; i++) {
			set(fd, i);
			usleep(DELAY_US);
		}
		for (i = LEDS-1; i != 0; i--) {
			set(fd, i);
			usleep(DELAY_US);
		}
	}
	return 0;
}
		for (i = LEDS-1; i != 0; i--) {
			set(fd, i);
			usleep(DELAY_US);
		}
	}
	return 0;
}