Smartibot

The Puck's capsense code is here: https://github.com/espruino/Espruino/blo­b/master/targets/nrf5x/nrf5x_utils.c#L61­

But I actually don't use the hardware variant - I use the simple software one below it.

Just FYI -if you want to see how something is done, look in http://www.espruino.com/Reference and after the title of a function there's a => symbol - click on that and you'll go right to GitHub where it's defined.

Here's some code you can use. I'll update the NRF52LL page:

function capSense2(PINDRV, PIN1, PIN2) {
  var ll = require("NRF52LL");
  digitalWrite(PINDRV,0);
  digitalRead([PIN1,PIN2]);
  // create a 'toggle' task for output
  var t0 = ll.gpiote(0, {type:"task",pin:PINDRV,lo2hi:1,hi2lo:1,­initialState:0});
  // two input tasks, one for each cap sense input
  var e1 = ll.gpiote(1, {type:"event",pin:PIN1,lo2hi:1,hi2lo:0})­;
  var e2 = ll.gpiote(2, {type:"event",pin:PIN2,lo2hi:1,hi2lo:0})­;
  // create a timer that counts up to 1000 and back at full speed
  var tmr = ll.timer(3,{cc:[1000],cc0clear:1});
  // use a PPI to trigger toggle events
  ll.ppiEnable(0, tmr.eCompare[0], t0.tOut);
  // use 2 more to 'capture' the current timer value when a pin changes from low to high
  ll.ppiEnable(1, e1.eIn, tmr.tCapture[1]);
  ll.ppiEnable(2, e2.eIn, tmr.tCapture[2]);
  // Manually trigger a task to clear and start the timer
  poke32(tmr.tClear,1);
  poke32(tmr.tStart,1);
  return { read : function() {
    return [ peek32(tmr.cc[1]), peek32(tmr.cc[2]) ];
  } };
}

var cap = capSense2(D25, D31, D5);

setInterval(function() {
  console.log(cap.read());
},500);