Hey everyone
I have started on a small midi contrller project for my school fair. I got an Arduino and some electronic parts. I found this programming code on the web but it wont verify for me. I dont understand the error messages as I am only starting to learn. Can anyone help me.
This is the code I downloaded.
// This sketch is for building a simple MIDI controller with 2 buttons for
// sending note values & 2 knobs for control values
// To get this working, you should have set up the following hardware:
// - a switch from Digital Pin 2 to +5v, and a 1 to 10K resistor from
// pin 2 to ground
// - a switch from Digital Pin 3 to +5v, and a 1 to 10K resistor from
// pin 3 to ground
// - a potentiometer with one side at +5v, one side at ground, and the
// wiper (center pin) connected to Analog Pin 0
// - a potentiometer with one side at +5v, one side at ground, and the
// wiper (center pin) connected to Analog Pin 1
#include "Midi.h"
// Create an instance of the Midi class.
//
// If we were had to receive messages, you'd have to make a subclass of the
// Midi class. See the MidiReceiveExample for an example of how to do that.
//
// Sending is a lot easier 
Midi midi(Serial);
void setup()
{
// Configure digital pins for input.
pinMode(2, INPUT);
pinMode(3, INPUT);
// This causes the midi object to listen to ALL Midi channels. If a number
// from 1-16 is passed, messages will be filtered so that any messages to
// channels other than the given one will be ignored.
midi.begin(0);
}
int lastDigital2 = LOW;
int lastDigital3 = LOW;
int lastAnalog0 = 0;
int lastAnalog1 = 0;
// MIDI channel to send messages to
int channelOut = 1;
void doControls()
{
int a;
// Changes on analog lines cause control change events
// to be sent; these are parameters from 0-127
a = analogRead(0) / 8 ;
if (a != lastAnalog0) {
midi.sendControlChange(channelOut, 15, a);
lastAnalog0 = a;
}
a = analogRead(1) / 8;
if (a != lastAnalog1) {
midi.sendControlChange(channelOut, 16, a);
lastAnalog1 = a;
}
}
void doKeys()
{
int d;
// Basic code to check pins 2-5; if there's a change on the pin, send
// a NOTE ON or NOTE OFF, depending on whether the button was pressed
// or released, with a different note value for each button. The velocity
// for all of the NOTE ON messages is the max (127)
d = digitalRead(2);
if (d != lastDigital2) {
if (d == HIGH) {
midi.sendNoteOn(channelOut, 40, 127);
} else {
midi.sendNoteOff(channelOut, 40, 0);
}
lastDigital2 = d;
}
d = digitalRead(3);
if (d != lastDigital3) {
if (d == HIGH) {
midi.sendNoteOn(channelOut, 41, 127);
} else {
midi.sendNoteOff(channelOut, 41, 0);
}
lastDigital3 = d;
}
}
void loop()
{
// DON'T need to call midi.poll(), because this sketch doesn't need to
// receive any Midi data.
doKeys();
doControls();
}