Add function deepSleepExt1 for EXP32

[cwilling]

An array of RTC enabled GPIOs can be used to wake from deep sleep. Example code:

// Flash LED1 (while awake) var on = false; setInterval(function() { on = !on; LED1.write(on); }, 500);

// Every 10secs, sleep until any of pinArray is pressed setInterval(function() { var pinArray = [D4,D15];

ESP32.deepSleepExt1(pinArray, 1); }, 10000);

[gfwilliams]

Thanks! For the array, please could you use jsvIterator instead?

  JsvIterator it;
  jsvIteratorNew(&it, array, JSIF_DEFINED_ARRAY_ElEMENTS);
  while (jsvIteratorHasElement(&it)) {
   ... jsvIteratorGetValue(&it);
    jsvIteratorNext(&it);
  }
  jsvIteratorFree(&it);

There are some plans to change the way arrays are stored eventually (to make them a tree), so when doing that using LastChild would break.

[cwilling]

OK, using JsvIterator now.

[gfwilliams]

That was quick! But sorry - just spotted some other minor things...

• Can pinSum = (uint64_t)pow(2, pin); be pinSum = 1<<pin; in the two places where it's done? There's no need to drag in double arithmetic for it when a shift will do.
• Pin pin = jshGetPinFromVar(jsvIteratorGetValue(&it)); will actually cause a memory leak because the return value from jsvIteratorGetValue isn't unlocked. It's not a big deal as we're shutting everything down, but it's not good practise esp if someone copy/pastes it for something else. All you need to do is change it to jshGetPinFromVarAndUnLock(jsvIteratorGetValue(&it));

[cwilling]

Done. Thanks for the tips.

[gfwilliams]

Great! Thanks!