/*
Arduino pins:
- digital pin 13 (SCK) = SPI SCLK (PGA2311 pin 6)
- digital pin 12 (MISO) = not used
- digital pin 11* (MOSI) = SPI SDI/MOSI (PGA2311 pin 3)
- digital pin 10* (SS) = SPI \CS (PGA2311 pin 2)
- digital pin 6* = IR receiver data
- digital pin 1 = not connected
- digital pin 0 = not connected
* is a PWM pin
/*-----( Import needed libraries )-----*/
#include <Wire.h> // Comes with Arduino IDE
// Get the LCD I2C Library here:
// https://bitbucket.org/fmalpartida/new-liquidcrystal/downloads
// Move any other LCD libraries to another folder or delete them
// See Library "Docs" folder for possible commands etc.
#include <LiquidCrystal_I2C.h>
#include <IRremote.h>
#include <stdlib.h>
#include <SPI.h>
/*-----( Declare Constants )-----*/
/*-----( Declare objects )-----*/
// set the LCD address to 0x27 for a 20 chars 4 line display
// Set the pins on the I2C chip used for LCD connections:
// addr, en,rw,rs,d4,d5,d6,d7,bl,blpol
LiquidCrystal_I2C lcd(0x27, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE); // Set the LCD I2C address
/*-----( Declare Constants )-----*/
#define RELAY_ON 0
#define RELAY_OFF 1
/*-----( Declare objects )-----*/
/*-----( Declare Variables )-----*/
#define Relay_1 2 // Arduino Digital I/O pin number
#define Relay_2 3
#define Relay_3 4
/*IR detector data=pin 6
* PGA2311 gain:
N = 1 to 255
* Gain (dB) = 31.5-[0.5*(255-N)]
* SPI interface:
* /CS (pin 2)
* SCLK (pin 6)
* SDI (pin 3)
* SDO (pin 7)
*/
const int slaveSelectPin = 10;
int RECV_PIN = 6;
IRrecv irrecv(RECV_PIN);
decode_results results;
String lastIRoperation;
int relay1 = 2;
int relay2 = 3;
int on = 0;
int on1 = 0;
int on2 = 0;
char cGain[17];
String gain;
char icGain[6];
float iGain = -95.5;
float nGain = 1;
void setup() {
Serial.begin(9600); // Used to type in characters
lcd.begin(16,2); // initialize the lcd for 16 chars 2 lines, turn on backlight
lcd.write("CJ's Preamp ");
irrecv.enableIRIn();
pinMode(slaveSelectPin, OUTPUT);
SPI.begin();
//-------( Initialize Pins so relays are inactive at reset)----
digitalWrite(Relay_1, RELAY_ON);
digitalWrite(Relay_2, RELAY_OFF);
//---( THEN set pins as outputs )----
pinMode(relay2, OUTPUT);
pinMode(relay1, OUTPUT);
delay(4000); //Check that all relays are inactive at Reset
}
int VolumeUp() {
if (nGain < 255) {
nGain = nGain + 1;
setGain(nGain);
setVolumeBar(nGain);
}
else {
lcd.setCursor(0, 0);
lcd.write("Maximum Reached");
delay(500);
}
}
int VolumeDown() {
if (nGain > 1) {
nGain = nGain - 1;
setGain(nGain);
setVolumeBar(nGain);
}
else {
lcd.setCursor(0,0);
lcd.write("Minimum Reached ");
delay(500);
}
}
void setGain(int nGain) {
digitalWrite(slaveSelectPin,LOW);
SPI.transfer(nGain); // right channel
SPI.transfer(nGain); // left channel
digitalWrite(slaveSelectPin,HIGH);
}
void setVolumeBar(int nGain) {
// convert gain to a decibal string, and write to the lcd
iGain = 31.5 - 0.5*(255 - float(nGain));
gain.toCharArray(icGain, 6);
dtostrf(iGain,4,1,icGain);
gain = String(icGain);
lcd.clear();
lcd.write("CJ's Preamp ");
("Volume: " + gain + " dB").toCharArray(cGain,17);
lcd.setCursor(0, 1); //first line
lcd.write(cGain);
// write the volume bar
}
unsigned long last = millis();
void loop() {
// Decode the IR if recieved
if (irrecv.decode(&results)) {
if(results.value == 2011254788) {
lastIRoperation = "volumeUp";
VolumeUp();
}
if(results.value == 2011246596) {
lastIRoperation = "volumeDown";
VolumeDown();
}
if (results.value == 2011271172)
{ // Remote Control Power Code
// If it's been at least 1/4 second since the last
// IR received, toggle the relay
if (millis() - last > 250)
{
on = !on;
digitalWrite(relay1, on ? HIGH : LOW);
lcd.setCursor(13,0); //Start at character 13 on line 0
lcd.print("IN1");
}
last = millis();
}
else if (results.value == 2011258884)
{
if (millis() - last > 250)
{
on1 = !on1;
digitalWrite(relay2, on1 ? HIGH : LOW);
lcd.setCursor(13,0); //Start at character 13 on line 0
lcd.print("IN2");
}
last = millis();
}
if(results.value == 4294967295) {
if (lastIRoperation == "volumeUp") { VolumeUp(); }
if (lastIRoperation == "volumeDown") { VolumeDown(); }
}
irrecv.resume(); // Receive the next value
}
}
