gistfile1.cpp

/*-
 * Copyright (c) 2012 Alfred Perlstein <[email protected]>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

 
// Pin 13 has an LED connected on most Arduino boards.
// give it a name:
int onboardLed = 13;
int powerPin = 4;
int powerState = 0;

int resetPin = 3;
int resetState = 0;

// the setup routine runs once when you press reset:
void setup() {                
  // initialize the digital pin as an output.
  pinMode(onboardLed, OUTPUT);    
  pinMode(powerPin, OUTPUT);    
  pinMode(resetPin, OUTPUT);    
}

void
pushPower()
{
      Serial.println("Holding down power button");
      digitalWrite(powerPin, HIGH);
      powerState = 1;
}

void
releasePower()
{
      digitalWrite(powerPin, LOW);
      Serial.println("Released power button");
      powerState = 0;
}

void
pushReset()
{
      Serial.println("Holding down reset button");
      digitalWrite(resetPin, HIGH);
      resetState = 1;
}

void
releaseReset()
{
      digitalWrite(resetPin, LOW);
      Serial.println("Released reset button");
      resetState = 0;
}

void serialHelp()
{
        Serial.println("Usage: \n"
        "P(hard power off), p(soft power off / power off)\n"
        "R(hit reset button)\n"
        "Ss(status)\n"
        "1(toggle power), 2(toggle reset)\n"
        );

}

// the loop routine runs over and over again forever:
void loop() {
  
top:
  if (Serial.available() > 0) {
    int incomingByte;
    // read the incoming byte:
    incomingByte = Serial.read();
    
//    Serial.print("Processing byte..  value: ");
//    Serial.println(incomingByte);
    
    switch (incomingByte) {
      case '1':
      if (powerState)
        releasePower();
      else
        pushPower();
      break;
      case '2':
      if (resetState)
        releaseReset();
      else
        pushReset();
      break;
      case 'P':
      if (powerState) {
            Serial.println("Button is already pushed, use 1 to toggle");
            serialHelp();
            break;
      }
      Serial.println("Performing hard power off");
      pushPower();
      delay(8000);
      releasePower();
      break;
      case 'p':
      if (powerState) {
            Serial.println("Button is already pushed, use 1 to toggle");
            serialHelp();
            break;
      }
      Serial.println("Performing soft power off");
      pushPower();
      delay(250);
      releasePower();
      break;
      case 'R':
      if (resetState) {
            Serial.println("Button is already pushed, use 2 to toggle");
            serialHelp();
            break;
      }
      Serial.println("Performing reset");
      pushReset();
      delay(250);
      releaseReset();
      break;
      case 's':
      case 'S':
      Serial.print("Status: power:");
      Serial.print(powerState);
      Serial.print(", reset:");
      Serial.println(resetState);
      break;
      default:
      serialHelp();
    }
    delay(10);
  }
}