// codeNRF52LL20200323TestSetWatchFORUM.js
// Mon 2020.03.23
// Copyright:  Robin G. Cox © 2020

// Preliminary test harness for nRF52 tutorial using PPI
// Reveals an anomaly when using setWatch() by providing different run time data sets

// It takes TWENTY seconds to initialize and render initial instructions


// Modified from
// Wed 2020.03.18
// http://forum.espruino.com/conversations/316941/






// MDBT42Q breakout board - oriented with USART pins on edge at 12 O'Clock

// External button wired through 2K2 to 3V3
// D15 fifth button from USART edge - 9 O'Clock

// D14 DigitalPulse out - used to trigger separate setWatch for timing
//   activate when the pulse is HI on D14
// A jumper wires D14 output to neighboring D16 as input for setWatch()


// A jumper wires D17 output to neighboring D18 as input for setWatch()


// PPI - wiring RTC to input pin for setWatch detection
// D22 lower left corner - 7 O'Clock
// It's output goes to base resistor of NPN 2n2222
// A jumper wires D22 to neighboring D20 as input for setWatch()


//                Rx Tx 
//     GND VIn D7 D8 D6
// GND
// VIn
// 3V3
// D14
// D15
// D16
// D17
// D18
// D19
// D20
// D22















// Reference


// http://www.espruino.com/Reference#l__global_setWatch

// http://www.espruino.com/Reference#l__global_digitalPulse
// digitalPulse( A0, 1, 5 );

// http://www.espruino.com/Reference#l__global_pinMode
// pinMode( pin, 'output' );