Hi everyone! Fair warning: noob alert!
I've been wracking my brain on this one. I'm working through this project: 8-loop switch
#include <Key.h>
#include <Keypad.h>
#include <EEPROM.h>
#include <Wire.h>
#include <LiquidCrystal.h>
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
const int BTN1 = 30; //Pin for Button 1
const int BTN2 = 31; //Pin for Button 2
const int BTN3 = 32; //Pin for Button 3
const int LED1 = 50; //Pin for LED1 (for Button 1)
const int LED2 = 51; //Pin for LED2 (for Button 2)
const int LED3 = 52; //Pin for LED3 (for Button 3)
const int bankButton = 53; //Pin for Bank Button
const byte rows = 8;
const byte cols = 3;
char keys[rows][cols] = {
{'a','i','q'},
{'b','j','r'},
{'c','k','s'},
{'d','l','t'},
{'e','m','u'},
{'f','n','v'},
{'g','o','w'},
{'h','p','x'}
};
byte rowPins[rows] = {22, 23, 24,25, 26,27, 28, 29}; /*switch pins*/
byte colPins[cols] = {50, 51, 52}; /*3-way selector pins*/
Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, rows, cols);
int relayPin[8] = {33,34,35,36,37,38,39,40}; /*relay/loop pins*/
int ledPin[8] = {41,42,43,44,45,46,47,48}; /*LED pins*/
byte midiChannel = 0;
int i;
int readOut;
int numberOfPedal = 8;
int bank = 0; //Starting Bank Number
boolean lastBTN1 = LOW;
boolean currentBTN1 = LOW;
boolean lastBTN2 = LOW;
boolean currentBTN2 = LOW;
boolean lastBTN3 = LOW;
boolean currentBTN3 = LOW;
boolean lastBankButton = LOW;
boolean currentBankButton = LOW;
/* Setup */
void setup()
{
for(i=0; i<numberOfPedal; i++)
{
pinMode(relayPin[i], OUTPUT);
pinMode(ledPin[i], OUTPUT);
digitalWrite(relayPin[i],HIGH); //pullup all relay outputs
}
Serial.begin(31250); /* for midi communication - pin 1 TX */
/*for (int i = 0; i < 512; i++) // erase eeprom (optional)
// EEPROM.write(i, 0); */
pinMode(BTN1, INPUT); //Button 1 as INPUT
pinMode(BTN2, INPUT); //Button 2 as INPUT
pinMode(BTN3, INPUT); //Button 3 as INPUT
pinMode(LED1, OUTPUT); //LED1 (for Button 1) as OUTPUT
pinMode(LED2, OUTPUT); //LED2 (for Button 2) as OUTPUT
pinMode(LED3, OUTPUT); //LED3 (for Button 3) as OUTPUT
pinMode(bankButton, INPUT); //Bank Button as INPUT
bank ++;
digitalWrite(LED1, LOW); //Write LOW to Pin for LED1
digitalWrite(LED2, HIGH); //Write HIGH to Pin for LED2
digitalWrite(LED3, HIGH); //Write HIGH to Pin for LED3
lcd.begin(16, 2);
lcd.print("You are trying");
lcd.setCursor(0,1);
lcd.print("way too hard");
delay(3000);
lcd.clear();
lcd.print("Bank ");
lcd.print(bank);
lcd.setCursor(0,1);
lcd.print("Normal Mode");
}
boolean BTN1debounce(boolean last) { //for Set Button
boolean current = digitalRead(BTN1);
if (last != current) {
delay(5);
current = digitalRead(BTN1);
}
return current;
}
boolean BTN2debounce(boolean last) { //for Switch Button
boolean current = digitalRead(BTN2);
if (last != current) {
delay(5);
current = digitalRead(BTN2);
}
return current;
}
boolean BTN3debounce(boolean last) { //for Loop Button
boolean current = digitalRead(BTN3);
if (last != current) {
delay(5);
current = digitalRead(BTN3);
}
return current;
}
boolean bankdebounce(boolean last) { //for Bank Button
boolean current = digitalRead(bankButton);
if (last != current) {
delay(5);
current = digitalRead(bankButton);
}
return current;
}
/* */
void midiProg(byte status, int data)
{
Serial.write(status);
Serial.write(data);
}
/* Switch select and store preset */
void memory(int addr, int led)
{
for(i=0; i<numberOfPedal; i++)
{
EEPROM.write((addr) + i, digitalRead(relayPin[i]));
digitalWrite(ledPin[i], LOW);
}
lcd.clear();lcd.print("Stored at ");
lcd.print(led + 1);
delay(100);
digitalWrite(ledPin[led], HIGH);
delay(100);
digitalWrite(ledPin[led], LOW);
delay(100);
digitalWrite(ledPin[led], HIGH);
delay(100);
digitalWrite(ledPin[led], LOW);
delay(100);
digitalWrite(ledPin[led], HIGH);
delay(100);
digitalWrite(ledPin[led], LOW);
delay(100);
digitalWrite(ledPin[led], HIGH);
lcd.clear();
}
/* Loop select */
void writeOut(int relay)
{
digitalWrite(relayPin[relay], !digitalRead(relayPin[relay]));
digitalWrite(ledPin[relay], !digitalRead(relayPin[relay]));
lcd.clear();
lcd.print(" loop FX ");
lcd.print(relay + 1);
}
/* Normal use/read mode */
void readPreset(int addr, int pcNum, int led)
{
for(i=0; i<numberOfPedal; i++)
{
digitalWrite(relayPin[i], EEPROM.read((addr)+i));
digitalWrite(ledPin[i], LOW);
digitalWrite(ledPin[led], HIGH);
}
lcd.clear();
lcd.print(" Preset ");
lcd.print(led + 1);
midiProg(0xC0, pcNum +1); /* send midi change program 1 */
}
/* Debounce and program stuff */
void loop()
{
currentBankButton = bankdebounce(lastBankButton);
if (lastBankButton == LOW && currentBankButton == HIGH) {
bank ++;
lcd.clear();
lcd.print("Bank ");
lcd.print(bank);
lcd.setCursor(0,1);
lcd.print("Hit Set/Play");
if (bank >= 5) {
bank = 0;
}
}
lastBankButton = currentBankButton;
currentBTN1 = BTN1debounce(lastBTN1);
if (lastBTN1 == LOW && currentBTN1 == HIGH) {
digitalWrite(LED1, LOW);
digitalWrite(LED2, HIGH);
digitalWrite(LED3, HIGH);
lcd.clear();
lcd.print("Bank ");
lcd.print(bank);
lcd.setCursor(0,1);
lcd.print("Preset #");
}
lastBTN1 = currentBTN1;
currentBTN2 = BTN2debounce(lastBTN2);
if (lastBTN2 == LOW && currentBTN2 == HIGH) {
digitalWrite(LED1, HIGH);
digitalWrite(LED2, LOW);
digitalWrite(LED3, HIGH);
lcd.clear();
lcd.print("Bank ");
lcd.print(bank);
lcd.setCursor(0,1);
lcd.print("Choose Switch");
}
lastBTN2 = currentBTN2;
currentBTN3 = BTN3debounce(lastBTN3);
if (lastBTN3 == LOW && currentBTN3 == HIGH) {
digitalWrite(LED1, HIGH);
digitalWrite(LED2, HIGH);
digitalWrite(LED3, LOW);
lcd.clear();
lcd.print("Bank ");
lcd.print(bank);
lcd.setCursor(0,1);
lcd.print("Choose Loops");
}
lastBTN3 = currentBTN3;
char key = keypad.getKey();
if(key) // Check for a valid key.
{
switch (key)
{
/* LOOP SELECT MODE - 'a' to 'h' for 8 pedals; (relay number or led) */
case 'a':
writeOut(0);
break;
case 'b':
writeOut(1);
break;
case 'c':
writeOut(2);
break;
case 'd':
writeOut(3);
break;
case 'e':
writeOut(4);
break;
case 'f':
writeOut(5);
break;
case 'g':
writeOut(6);
break;
case 'h':
writeOut(7);
break;
/* STORE PRESET MODE - (EEPROM address, led) */
case 'i':
memory(11,0);
break;
case 'j':
memory(21,1);
break;
case 'k':
memory(31,2);
break;
case 'l':
memory(41,3);
break;
case 'm':
memory(51,4);
break;
case 'n':
memory(61,5);
break;
case 'o':
memory(71,6);
break;
case 'p':
memory(81,7);
break;
/* READ PRESET MODE (EEProm address,PcNum,led number) */
case 'q':
readPreset(11, 1, 0);
break;
case 'r':
readPreset(21, 2, 1);
break;
case 's':
readPreset(31, 3, 2);
break;
case 't':
readPreset(41, 4, 3);
break;
case 'u':
readPreset(51, 5, 4);
break;
case 'v':
readPreset(61, 6, 5);
break;
case 'w':
readPreset(71, 7, 6);
break;
case 'x':
readPreset(81, 8, 7);
break;
}
}
}
It is a switch board to control guitar pedals: audio from guitar > 8 loops (send/return to pedals via relays). You select your loops (8 loops total) and program them to a preset button/switch.
This tutorial has this set up with a 3-way selector: Select loops, Select Preset & save to EEPROM, and Read from EEPROM the stored setting.
I'd like to replace the 3-way selector with 3 push buttons; however, since the selector manually cuts off the signal of the other 2 pins, when I replace the switch with LEDs, the KEYPAD library has all 3 selectors on at once.
I was able to get the LCD display and debounce function working for 3 buttons to call 3 LEDs either HIGH or LOW, but can't figure out how to make the keypad call only the LED that's LOW for the respective setting.
Is there a way to replace the 3-way selector with 3 push buttons for use with the keypad?
Thank you in advance!
