#include <stdio.h>
#include <pthread.h>
#include <strings.h>
#include <alsa/asoundlib.h>

snd_rawmidi_t *in, *out;


void midi_open(char *rawmidi_device) {
	int err;

	err = snd_rawmidi_open(&in, &out, rawmidi_device, SND_RAWMIDI_NONBLOCK);
	if (err < 0) {
		fprintf(stderr, "snd_rawmidi_open %s failed: %d\n", rawmidi_device, err);
		exit(EXIT_FAILURE);
	}

}



int main() {
	int cnt, err;
	unsigned char c;
	unsigned char cmd[8] = {0xF0, 0x00, 0x20, 0x0D, 0x68, 0x02, 0x10, 0xF7};

	midi_open("hw:1,2");

	for (;;) {
		cnt++;
		err = snd_rawmidi_write(out, &cmd, 8);
		if (err < 0) {
			fprintf(stderr,"snd_rawmidi_write failed: %d\n", err);
			exit(EXIT_FAILURE);
		}

		snd_rawmidi_drain(out);

		for (;;) {
			err = snd_rawmidi_read(in, &c, 1);
			if (err < 0) {
				if (err==-11) {
					printf("\n");
					break;
				}
				fprintf(stderr,"snd_rawmidi_read failed: %d\n", err);
				exit(EXIT_FAILURE);
			} else {
				printf(" 0x%02x", c);
			}
		}
		

		
		printf("\r%d", cnt);
	}

	
}