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//>>> The latest version of this code can be found at https://github.com/jcw/ !!

// Demo of the opto-coupler plug

// 2010-09-26 <jcw@equi4.com> http://opensource.org/licenses/mit-license.php

// $Id: opto_demo.pde 7763 2011-12-11 01:28:16Z jcw $

#include <Ports.h>

#include <RF12.h>

Port optoIn (3), optoOut (4), testIn (2), testOut (1);

byte state; // counts on each cycle, bits 3..0 used as test signals

// has to be defined because we're using the watchdog for low-power waiting

ISR(WDT_vect) { Sleepy::watchdogEvent(); }

void setup () {

    rf12_initialize(9, RF12_868MHZ, 5);

    // connect to opto-coupler plug as inputs with pull-ups enabled 

    optoIn.digiWrite(1);

    optoIn.mode(INPUT);

    optoIn.digiWrite2(1);

    optoIn.mode2(INPUT);

    // connect to opto-coupler plug as output 

    optoOut.mode(OUTPUT);

    optoOut.mode2(OUTPUT);

    // the testIn port will be used to generate test signals to optoIn

    testIn.mode(OUTPUT);

    testIn.mode2(OUTPUT);

    // the testOut port will be used to verify test signals from optoOut

    testOut.digiWrite(1);   // pull-up

    testOut.mode(INPUT);

    testOut.digiWrite2(1);  // pull-up

    testOut.mode2(INPUT);

}

void loop () {

    ++state;

    testIn.digiWrite(bitRead(state, 0));

    testIn.digiWrite2(bitRead(state, 1));

    optoOut.digiWrite(bitRead(state, 2));

    optoOut.digiWrite2(bitRead(state, 3));

    delay(2);

    byte payload[8];

    payload[0] = bitRead(state, 0);

    payload[1] = bitRead(state, 1);

    payload[2] = bitRead(state, 2);

    payload[3] = bitRead(state, 3);

    payload[4] = optoIn.digiRead();

    payload[5] = optoIn.digiRead2();

    payload[6] = testOut.digiRead();

    payload[7] = testOut.digiRead2();

    while (!rf12_canSend())

        rf12_recvDone();

    rf12_sendStart(0, payload, sizeof payload, 2);

    Sleepy::loseSomeTime(1000);

}