radiodrum

I just got some code running on Linux that reads the output of the Radiodrum alternative music controller. It reads data right from the MIDI port, /dev/midi1 and outputs the values to stdout.

#include <sys/soundcard.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>

#define  MIDI_DEVICE  "/dev/midi1"

int main(void) {
  unsigned char message[4];

  int byte1, byte2, byte3;
  float s1x, s1y, s1z;
  float s2x, s2y, s2z;

  int s1whack;
  int s2whack;

  // first open the sequencer device for reading.
  int seqfd = open(MIDI_DEVICE, O_RDONLY);
  if (seqfd == -1) {
 printf("Error: cannot open %s\n", MIDI_DEVICE);
 exit(1);
  } 

  // now just wait around for MIDI bytes to arrive and print them to screen.
  while (1) {
 read(seqfd, &message, sizeof(message));

 byte1 = message[0];
 byte2 = message[1];
 byte3 = message[2];

 s1whack = 0;
 s2whack = 0;

 if ((byte1 == 160)&&(byte2 == 1)) {
   s1whack = 1;
 }
 if ((byte1 == 160)&&(byte2 == 8)) {
   s1x = byte3 / 128.0;
 }
 if  ((byte1 == 160)&&(byte2 == 9)) {
   s1y = byte3 / 128.0;
 }
 if  ((byte1 == 160)&&(byte2 == 10)) {
   s1z = (byte3-14.0) / 128.0;
 }
 if ((byte1 == 160)&&(byte2 == 2)) {
   s2whack = 1;
 }
 if ((byte1 == 160)&&(byte2 == 11)) {
   s2x = byte3 / 128.0;
 }
 if ((byte1 == 160)&&(byte2 == 12)) {
   s2y = byte3 / 128.0;
 }
 if  ((byte1 == 160)&&(byte2 == 13)) {
   s2z = (byte3 -14) / 128.0;
 }

 printf("%f %f %f\t%f %f %f\n",s1x,s1y,s1z,s2x,s2y,s2z);
      
  }
}