void tempoSet(int tempo )
{
struct midiHead *mh;
struct midiTrack *mt;
char buffer[256];
int i;
int ticks = 60000000 / tempo;
printf("Set ticks to 0x%08x\n", ticks );
mh = (struct midiHead *)&buffer[0];
mt = (struct midiTrack *)&buffer[14];
sprintf(mh->chunkID, "MThd" );
mh->size = 6;
mh->format = 0;
mh->tracks = 1;
mh->time = 24; // 24 ticks per qtr note
sprintf(mt->chunkID, "MTrk" );
mh->size = 6;
buffer[22] = 0xff;
buffer[23] = 0x51;
buffer[24] = 0x03;
buffer[25] = ( ticks & 0xFF0000 ) >> 16;
buffer[26] = ( ticks & 0xFF00 ) >> 8;
buffer[27] = ( ticks & 0xFF );
send_sequence(buffer, 28 );
}
void
set_sr16_song(int song )
{
char buffer[8];
code = ( song << 1 ) | ab;
buffer[0] = 0xB6;
buffer[1] = 0xF3; // Song Request
buffer[2] = code;
send_sequence(buffer, 3 );
}
void
set_sr16_pattern(int pattern, int ab )
{
int code; // Bits 7-1 are the "Preset Rhythm Programs" and Bit 0 represents A or B
char buffer[8];
code = ( song << 1 ) | ab;
buffer[0] = 0xB6;
buffer[1] = 0xF3; // Song Request
buffer[2] = code;
send_sequence(buffer, 3 );
}
int main(int argc, char **argv)
{
int r, g, b;
// parse arguments
if (!parse_arguments(argc, argv, &r, &g, &b))
return -1;
// Set up gpi pointer for direct register access
setup_io();
// calibrate our timers
calibrate(1000000);
// Set GPIO pin 4 to output
INP_GPIO(4); // must use INP_GPIO before we can use OUT_GPIO
OUT_GPIO(4);
decode_sequence(r, g, b);
send_sequence();
return 0;
} // main
