PuckPad

Thought I'd share my progress on my latest project the PuckPad. Currently a breadboard project which I'll hopefully move onto a custom PCB once I've ironed out all the issues ( and found another adafruit joypad pcb available in the UK ).

The puck will read the relevant pins every 750ms ( will be 200ms outside of testing ) and update the custom BLE characteristic.

// Author : Adam 
// Project: PuckPad
// Firmware: 0.10
// BLE Services : Battery, Device and Custom controller
// 
//  Battery: 0x180F ->  0x2A19
//  Device:  0x180A - > 0x2A29 (Manufactor Name)
//                  - > 0x2A26 (Firmware Version)
//  Custom: 0x9AD0 -> 0x9AD1 ( Int8 * 4 ) left xy right xy
//                 -> 0x9AD2 ( 0 or 1 ); extra BTN
//
//
// Puckpad has two analog joysticks and two buttons.
// The pad will simply send each joysticks XY vlaues to a proxy IOS application to fly a parrot drone.
//
//   GND -> GND
//   3V  -> 3V
//   D2  -> X left joypad
//   D31  -> Y left joypad
//   D30  -> X right joypad
//   D29  -> Y right joypad
//   D28  -> BTN

pinMode( D30, "input_pulldown" ); //currently not in use 
pinMode( D29, "input_pulldown" ); // currnetly not in use

var fwVersion = "0.9";
var flashy = [150,200,150,200,150];
var vflashy = [50,50,50];
var connected = false;
var refreshRate = 750;
var isReading = false;
var loopy = null;

var xyxy = [0x00,0x00,0x00,0x00];

var padBTN = 'D28';
var pins = [ 'D2','D31','D30','D29'];
// joypad     LX   LY    RX    RY  

NRF.on('connect', function(addr) {
  connected = true;
  updateBattery();
  digitalPulse(LED3,1,flashy);
  
});

NRF.on('disconnect', function(addr) {
  connected = false;
  isReading = false;
  digitalPulse(LED1,1,flashy);
 }
);

NRF.setServices({
  0x180F : {
    0x2A19: {
      readable: true,
      notify: true,
      value : [100]
    }
  },
  0x9AD0 : {
    0x9AD1 : {
      readable: true,
      notify: true,
      value: xyxy
    },
    0x9AD2 : {
      readable : true,
      notify: true,
      value: [0x00]
    }
  },
  0x180A : {
    0x2A29 : {
      readable: true,
      value: 'PuckPad'
    },
    0x2A26 : {
      readable: true,
      value: fwVersion
    }
  }
});

function updateBattery () {
  NRF.updateServices({
  0x180F : {
    0x2A19: {
      notify: true,
      value : [Puck.getBatteryPercentage()]
    }
  }
});
}

function updateXYXY(){

  xyxy.forEach(function(pinData,index) {
    xyxy[index] = Math.floor(analogRead(pins[index]) * 100);
  });
  
  // some manual calibration 
  xyxy[0] += 1;
  xyxy[1] += 2;
  xyxy[2] += 1;
  xyxy[3] += 1;

  NRF.updateServices({
    0x9AD1 : {
      0x9AD1 : {
        notify: true,
        value: xyxy
      }
    }
  });
}

function updateBTN1 (buttonIs) {
 NRF.updateServices({
  0x9AD0 : {
    0x9AD2 : {
      notify: true,
      value: buttonIs
    }
  }
});
}

setWatch(function(e){
  isReading = !isReading;
  if (connected) { 
    if (isReading) {
      digitalPulse(LED3,1,vflashy);
      updateXYXY();
      loopy = setInterval(updateXYXY,refreshRate);
    } else {
    clearInterval(loopy);
    digitalPulse(LED1,1,vflashy);
    }
  } else {
    digitalPulse(LED2,1,flashy);
  }
}, BTN, {repeat:true, debounce:50, edge:"falling"});

TODO

• Add second joystick
  
• Complete IOS app - pure software controller working just need to connect to the puck and get the values.
  
• Create custom PCB - adafruit have already created a single PCB file
  
• Check battery usage
  
  

I'll hopefully post back my progress in the coming weeks :)

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