Heyho! (Rookie here :X)
I built a generally simple MIDI foot controller with 15 switches in a 5x3 grid with a Teensy 3.6 at it's heart. The switches are meant to be momentary. I'm "just" a web developer, so C/C++ is a blackbox to me, especially in the Arduino environment.
By trying to keep the code relatively clean and tidy with a class, I get all sorts of errors which I can't solve by googling.
I'm using Arudino 1.8.9 on macOS High Sierra–
Now to the my code, lads and ladies!
#include <Bounce.h>
#include <MIDI.h>
MIDI_CREATE_INSTANCE(HardwareSerial, Serial4, MIDI);
const int ledPin = LED_BUILTIN; // 18;
const int debounceDelay = 25; // originally 25; // in ms
const int MIDIChannel = 1;
class Footswitch {
private:
byte pin;
byte cc;
Bounce switch;
public:
Footswitch(byte pin, byte cc, int debounceDelay) {
this->pin = pin;
this->cc = cc;
this->switch = Bounce(pin, debounceDelay);
}
void check() {
switch.update();
if (this->switch.risingEdge()) {
digitalWrite(ledPin, HIGH);
usbMIDI.sendControlChange(this->cc, 127, MIDIChannel);
MIDI.sendControlChange(this->cc, 127, MIDIChannel);
}
if (this->switch.fallingEdge()) {
digitalWrite(ledPin, LOW);
usbMIDI.sendControlChange(this->cc, 0, MIDIChannel);
MIDI.sendControlChange(this->cc, 0, MIDIChannel);
}
}
};
Footswitch fsArray[5][3] = {
{
Footswitch(2, 42, debounceDelay),
Footswitch(3, 43, debounceDelay),
Footswitch(4, 44, debounceDelay),
},
{
Footswitch(5, 45, debounceDelay),
Footswitch(6, 46, debounceDelay),
Footswitch(7, 47, debounceDelay),
},
{
Footswitch(8, 48, debounceDelay),
Footswitch(9, 49, debounceDelay),
Footswitch(10, 50, debounceDelay),
},
{
Footswitch(11, 51, debounceDelay),
Footswitch(12, 52, debounceDelay),
Footswitch(24, 54, debounceDelay),
},
{
Footswitch(25, 55, debounceDelay),
Footswitch(26, 56, debounceDelay),
Footswitch(27, 57, debounceDelay),
},
};
// the setup function runs once when you press reset or power the board
void setup() {
// initialize digital pin LED_BUILTIN as an output.
pinMode(ledPin, OUTPUT);
for (int i = 0; i <= 4; ++i) {
for (int j = 0; j <= 2; ++j) {
// example uses INPUT_PULLUP, which resulted in false presses in our case
pinMode(fsArray[i][j].pin, INPUT);
}
}
MIDI.begin(MIDI_CHANNEL_OMNI);
}
// the loop function runs over and over again forever
void loop() {
for (int i = 0; i <= 4; ++i) {
for (int j = 0; j <= 2; ++j) {
fsArray[i][j].check();
}
}
// debugging: does the teensy get power at all?
// digitalWrite(ledPin, HIGH);
// MIDI Controllers should discard incoming MIDI messages.
while (usbMIDI.read()) {}
}
The main error I'm getting is the following:
/path/to/loop-midi-controller/loop-midi-controller.ino:21:12: error: expected unqualified-id before 'switch'
Bounce switch;
^
/path/to/loop-midi-controller/loop-midi-controller.ino: In constructor 'Footswitch::Footswitch(byte, byte, int)':
/path/to/loop-midi-controller/loop-midi-controller.ino:26:13: error: expected unqualified-id before 'switch'
this->switch = Bounce(pin, debounceDelay);
^
/path/to/loop-midi-controller/loop-midi-controller.ino: In member function 'void Footswitch::check()':
/path/to/loop-midi-controller/loop-midi-controller.ino:29:13: error: expected '(' before '.' token
switch.update();
^
/path/to/loop-midi-controller/loop-midi-controller.ino:30:17: error: expected unqualified-id before 'switch'
if (this->switch.risingEdge()) {
^
/path/to/loop-midi-controller/loop-midi-controller.ino:30:17: error: expected ')' before 'switch'
/path/to/loop-midi-controller/loop-midi-controller.ino:36:17: error: expected unqualified-id before 'switch'
if (this->switch.fallingEdge()) {
^
/path/to/loop-midi-controller/loop-midi-controller.ino:36:17: error: expected ')' before 'switch'
/path/to/loop-midi-controller/loop-midi-controller.ino: In function 'void setup()':
/path/to/loop-midi-controller/loop-midi-controller.ino:19:10: error: 'byte Footswitch::pin' is private
byte pin;
^
/path/to/loop-midi-controller/loop-midi-controller.ino:83:29: error: within this context
pinMode(fsArray[i][j].pin, INPUT);
^
Fehler beim Kompilieren für das Board Teensy 3.6.
From what I can tell and the test programs I wrote, where I only checked for one switch, every switch works as expected. The case is finished and polished, so the last thing that's standing between me and looping the hell out of my music setup, is the code for all switches.
Thanks for helping!
<3
Louis
