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mp3 shield midi mode
#include <SoftwareSerial.h>
SoftwareSerial mySerial(2, 3); //Soft TX on 3, we don't use RX in this code
byte note = 0; //The MIDI note value to be played
byte resetMIDI = 4; //Tied to VS1053 Reset line
byte ledPin = 13; //MIDI traffic inidicator
int instrument = 3;
void setup() {
Serial.begin(57600);
//Setup soft serial for MIDI control
mySerial.begin(31250);
//Reset the VS1053
pinMode(resetMIDI, OUTPUT);
digitalWrite(resetMIDI, LOW);
delay(100);
digitalWrite(resetMIDI, HIGH);
delay(100);
}
void loop() {
talkMIDI(0xB0, 0x07, 120); //0xB0 is channel message, set channel volume to near max (127)
/*
//Demo Basic MIDI instruments, GM1
//=================================================================
*/
Serial.println("Basic Instruments");
talkMIDI(0xB0, 0, 0x00); //Default bank GM1
//Change to different instrument
for(instrument = 0 ; instrument < 127 ; instrument++) {
Serial.print(" Instrument: ");
Serial.println(instrument, DEC);
talkMIDI(0xC0, instrument, 0); //Set instrument number. 0xC0 is a 1 data byte command
//Play notes from F#-0 (30) to F#-5 (90):
for (note = 30 ; note < 40 ; note++) {
Serial.print("N:");
Serial.println(note, DEC);
//Note on channel 1 (0x90), some note value (note), middle velocity (0x45):
noteOn(0, note, 60);
delay(50);
//Turn off the note with a given off/release velocity
noteOff(0, note, 60);
delay(50);
}
delay(100); //Delay between instruments
}
}
//Send a MIDI note-on message. Like pressing a piano key
//channel ranges from 0-15
void noteOn(byte channel, byte note, byte attack_velocity) {
talkMIDI( (0x90 | channel), note, attack_velocity);
}
//Send a MIDI note-off message. Like releasing a piano key
void noteOff(byte channel, byte note, byte release_velocity) {
talkMIDI( (0x80 | channel), note, release_velocity);
}
//Plays a MIDI note. Doesn't check to see that cmd is greater than 127, or that data values are less than 127
void talkMIDI(byte cmd, byte data1, byte data2) {
digitalWrite(ledPin, HIGH);
mySerial.print((byte)cmd);
mySerial.print((byte)data1);
//Some commands only have one data byte. All cmds less than 0xBn have 2 data bytes
//(sort of: http://253.ccarh.org/handout/midiprotocol/)
if( (cmd & 0xF0) <= 0xB0)
mySerial.print((byte)data2);
digitalWrite(ledPin, LOW);
}
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