El Radio

Build PhotoLog

Speakers and amp that I intended to re-purpose

Parts

Testing serial control of the BT module RN-52

Coding the screen interface and monitoring serial comms.

Taking volume measurement of old speaker enclosure to get an accurate replication.

Speaker enclosure spec'd out.

Right here is where I fried the first amp.

Ordered a replacement class D from adafruit. iz really loud.final components in the cabinetPrinted some translucent buttons to put the LED indicators from the arduino and BT module.

Code dump:

/*  
	El Radio
	Written by Jeremy Lambert
	Copyright 2015 All Rights Reserved

	This library is free software; you can redistribute it and/or
	modify it under the terms of the GNU Lesser General Public
	License as published by the Free Software Foundation; either
	version 2.1 of the License, or (at your option) any later version.

	This library is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
	Lesser General Public License for more details.
*/

#include "TFTLCD.h"
#include "TouchScreen.h"

#if not defined USE_ADAFRUIT_SHIELD_PINOUT 
 #error "For use with the shield, make sure to #define USE_ADAFRUIT_SHIELD_PINOUT in the TFTLCD.h library file"
#endif

// These are the pins for the shield!
#define YP A1  // must be an analog pin, use "An" notation!
#define XM A2  // must be an analog pin, use "An" notation!
#define YM 7   // can be a digital pin
#define XP 6   // can be a digital pin

#define TS_MINX 150
#define TS_MINY 120
#define TS_MAXX 920
#define TS_MAXY 940
#define MINPRESSURE 10
#define MAXPRESSURE 1000

TouchScreen ts = TouchScreen(XP, YP, XM, YM, 300);

#define LCD_CS A3
#define LCD_CD A2
#define LCD_WR A1
#define LCD_RD A0 

// Color definitions
#define	BLACK           0x0000
#define	BLUE            0x001F
#define	RED             0xF800
#define	GREEN           0x07E0
#define CYAN            0x07FF
#define MAGENTA         0xF81F
#define YELLOW          0xFFE0 
#define WHITE           0xFFFF

TFTLCD tft(LCD_CS, LCD_CD, LCD_WR, LCD_RD, 0);

#define BOXSIZE 80

String inputString = "";         // a string to hold incoming data
boolean stringComplete = false;  // whether the string is complete

void setup(void) {
  
  //Serial.println("TOUCHSCREEN::");
  
  tft.reset();
  
  uint16_t identifier = tft.readRegister(0x0);
  if (identifier == 0x9325) {
    //Serial.println("Found ILI9325");
  } else if (identifier == 0x9328) {
    //Serial.println("Found ILI9328");
  } else {
    //Serial.print("Unknown driver chip ");
    //Serial.println(identifier, HEX);
    while (1);
  }
  
  tft.initDisplay(); 
  tft.fillScreen(BLACK);
  
  DrawButtons();
  
  delay(5000); //let the BT module boot
  
  inputString.reserve(12);
  Serial.begin(115200);
  
  Serial.println("CMD"); //enter command mode. 
  delay(300);
  Serial.println("B"); //try to reconnect to the last device

  pinMode(13, OUTPUT);
}

void serialEvent() 
{
  while (Serial.available()) 
  {
    // get the new byte:
    char inChar = (char)Serial.read(); 
    // add it to the inputString:
    inputString += inChar;
    // if the incoming character is a newline, set a flag
    // so the main loop can do something about it:
    if (inChar == '\n') 
    {
      if (!inputString.startsWith("AOK"))
      {
      stringComplete = true;
      char output[inputString.length()];
        //Serial.println(inputString);
        inputString.toCharArray(output, inputString.length());
        tft.drawString(0,0,output, WHITE, 2); //TODO: need to put this somewhere else on the screen.
      }
    } 
  }
}

void loop()
{
 
  digitalWrite(13, HIGH);
  Point p = ts.getPoint();
  digitalWrite(13, LOW);
  
  // if you're sharing pins, you'll need to fix the directions of the touchscreen pins!
  //pinMode(XP, OUTPUT);
  pinMode(XM, OUTPUT);
  pinMode(YP, OUTPUT);
  //pinMode(YM, OUTPUT);

  // we have some minimum pressure we consider 'valid'
  // pressure of 0 means no pressing!

  if (p.z > MINPRESSURE && p.z < MAXPRESSURE) 
  {
    
    // turn from 0->1023 to tft.width
    p.x = map(p.x, TS_MINX, TS_MAXX, tft.width(), 0);
    p.y = map(p.y, TS_MINY, TS_MAXY, tft.height(), 0);
    
    /*
    Serial.print("("); Serial.print(p.x);
    Serial.print(", "); Serial.print(p.y);
    Serial.println(")");
    */
    
    if (p.x < BOXSIZE)
    {
      if (p.y > 240)
      {
        //rewind
        Serial.println("AT-");
        blinkButton(0);
        return;
      }
      if (p.y > 80)
      {
        //volume -
        Serial.println("AV-");
        blinkButton(4);
        return;
      }
      if (p.y > 0)
      {
        //volume +
        Serial.println("AV+");
        blinkButton(3);
        return;
      }
    }
    if (p.x < BOXSIZE*2)
    {
      if (p.y > 240)
      {
        //play/pause
        Serial.println("AP");
        blinkButton(1);
        return;
      }
    }
    if (p.x < BOXSIZE*3)
    {
      if (p.y > 240)
      {
        //ff
        Serial.println("AT+");
        blinkButton(2);
        return;
      }
      
      //spare
      
      //spare
      
      if (p.y > 0)
      {
        //if you push the bluetooth button, it goes to discoverable, since it's default
        //is attempt reconnect.
        Serial.println("@,1");
        blinkButton(5);
        return;
      }
    }
  }
}

void drawButton(int buttonID)
{
  switch(buttonID)
  {
    case 0: //rewind
      tft.fillRect(0, 240, BOXSIZE, BOXSIZE, BLACK);
      tft.drawRect(0, 240, BOXSIZE, BOXSIZE, WHITE); 
      tft.drawString(20, 270, "<<", WHITE, 3);
    break;
    case 1: //playpause
      tft.fillRect(BOXSIZE, 240, BOXSIZE, BOXSIZE, BLACK);
      tft.drawRect(BOXSIZE, 240, BOXSIZE, BOXSIZE, WHITE); 
      tft.drawString(95, 270, "||>", WHITE, 3);
    break;
    case 2: //ffwd
      tft.fillRect(BOXSIZE*2, 240, BOXSIZE, BOXSIZE, BLACK);
      tft.drawRect(BOXSIZE*2, 240, BOXSIZE, BOXSIZE, WHITE); 
      tft.drawString(180, 270, ">>", WHITE, 3); 
    break;
    case 3: //volumeup
      tft.fillRect(0, 0, BOXSIZE, BOXSIZE, BLACK);
      tft.drawRect(0, 0, BOXSIZE, BOXSIZE, WHITE); 
      //tft.drawString(35, 35, "^", WHITE, 4);
      tft.drawTriangle(40, 22, 53, 56, 26, 56, GREEN);
     tft.drawTriangle(40, 24, 53, 58, 26, 58, GREEN);  

    break;
    case 4: //volumedown
      tft.fillRect(0, 80, BOXSIZE, BOXSIZE, BLACK);
      tft.drawRect(0, 80, BOXSIZE, BOXSIZE, WHITE); 
      //tft.drawString(35, 100, "v", WHITE, 3);
     tft.drawTriangle(26,101,53,101,40,135,GREEN); 
     tft.drawTriangle(26,103,53,103,40,137,GREEN);
    break;
    case 5: //BLUETOOTH
      tft.fillRect(160, 0, BOXSIZE, BOXSIZE, BLACK);
      tft.drawRect(160, 0, BOXSIZE, BOXSIZE, WHITE); 
      //tft.drawString(180, 30, "BT", WHITE, 3);
     tft.drawLine(182, 10, 182, 70, BLUE);
     
    tft.drawLine(182, 10, 200, 25, BLUE);
    tft.drawLine(200,25, 182, 40, BLUE);
     tft.drawLine(200, 51, 182, 40, BLUE);
   tft.drawLine(182, 70, 200, 51, BLUE); 
    break;
    
  }
}

void blinkButton(int buttonID)
{
  switch(buttonID)
  {
    case 0:
      tft.fillRect(0, 240, BOXSIZE, BOXSIZE, WHITE);
      tft.drawString(20, 270, "<<", BLACK, 3);
    break;
    case 1:
      tft.fillRect(BOXSIZE, 240, BOXSIZE, BOXSIZE, WHITE);
      tft.drawString(95, 270, "||>", BLACK, 3);
    break;
    case 2:
      tft.fillRect(BOXSIZE*2, 240, BOXSIZE, BOXSIZE, WHITE);
      tft.drawString(180, 270, ">>", BLACK, 3); 
    break;
    case 3: //volumeup
      tft.fillRect(0, 0, BOXSIZE, BOXSIZE, WHITE);
      tft.drawTriangle(40, 22, 53, 56, 26, 56, RED);
     tft.drawTriangle(40, 24, 53, 58, 26, 58, RED);
      
    break;
    case 4: //volumedown
      tft.fillRect(0, 80, BOXSIZE, BOXSIZE, WHITE);
      tft.drawTriangle(26,101,53,101,40,135,RED); 
     tft.drawTriangle(26,103,53,103,40,137,RED); 
    break;
    case 5: //BLUETOOTH
      tft.fillRect(BOXSIZE*2, 0, BOXSIZE, BOXSIZE, WHITE);
      //tft.drawString(BOXSIZE*2 + 20, 30, "BT", BLACK, 3);
      tft.drawLine(182, 10, 182, 70, RED);
     
    tft.drawLine(182, 10, 200, 25, RED);
    tft.drawLine(200,25, 182, 40, RED);
     tft.drawLine(200, 51, 182, 40, RED);
   tft.drawLine(182, 70, 200, 51, RED);
    break;
  }
  delay(100);
  
  drawButton(buttonID);
}

void DrawButtons()
{
  for(int i=0; i < 6; i++)
 {
   drawButton(i);
 } 
 tft.drawString(25, 165, "VOL", GREEN, 2);
}