ir_send.ino

/*
#        DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE 
#                    Version 2, December 2004 
#
# Copyright (C) 2013  Yoshihiro TSUBOI <ytsuboi-at-gmail.com>
#
# Everyone is permitted to copy and distribute verbatim or modified 
# copies of this license document, and changing it is allowed as long 
# as the name is changed. 
#
#            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE 
#   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION 
#
#  0. You just DO WHAT THE FUCK YOU WANT TO.

Reffered: http://elm-chan.org/docs/ir_format.html
Reffered: http://hello-world.blog.so-net.ne.jp/archive/20110512

*/

#define IR_LED  7

void setup() { 
  pinMode(IR_LED, OUTPUT);
}

unsigned char data[] = {
  // AQUOS 0xAA 0x5A 0x8F 0x12 0x16 0xD1
  0xAA, 0x5A, 0x8F, 0x12, 0x16, 0xD1
#if 0
  // REGZA 0x40 0xBF 0x12 0xED
  0x40, 0xBF, 0x12, 0xED
#endif
};

void loop() {
  sendIrAEHA();		// AQUOS
  // sendIrNEC();	// REGZA
  while (1) {
    // do nothing
  }
}

void sendIrAEHA() {
  // T=425us
  const int dataCount = sizeof (data) / sizeof (data[0]);
  irPulse(3400, 1700);	// Leader
  for (int i = 0; i < dataCount; ++i) {
    for (int j = 0; j < 8; ++j)
      irPulse(425, (data[i] >> j) % 2 ? 1275 : 425);	// Data
  }
  irPulse(425, 68000);	// wait
  irPulse(3400, 1700);	// Repeat
  for (int i = 0; i < dataCount; ++i) {
    for (int j = 0; j < 8; ++j)
      irPulse(425, (data[i] >> j) % 2 ? 1275 : 425);	// Data
  }
  irPulse(425, 0);	// Trailer
}

void sendIrNEC() {
  // T=562us
  const int dataCount = sizeof (data) / sizeof (data[0]);
  irPulse(9000, 4500);i	// Leader
  for (int i = 0; i < dataCount; ++i) {
    for(int j = 0; j < 8; ++j)
      irPulse(562, (data[i] >> j) % 2 ? 1687 : 562);	// Data
  }
  irPulse(562, 40000);	// Trailer
}

void irPulse(unsigned long lenH, unsigned long lenL) {
  unsigned long irExp = micros() + lenH;

  while (irExp > micros()) {	// Output pulse for lenH usec
    digitalWrite(IR_LED, HIGH);
    delayMicroseconds(5);
    digitalWrite(IR_LED, LOW);
    delayMicroseconds(9);
  }
  
  if (lenL > 16000) {	// To avoid Arduino's delayMicroseconds limitation
    delay(lenL / 1000);
  } else {
    delayMicroseconds(lenL);	// for LenL usec
  }
}