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infrared bit banger on Arduino101
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LircRemote101.cpp
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README.md

LircRemote101

A project to enable infrared code playback using any single digital pin on the Arduino101 development board and a lirc-like input format.

Hardware requirements

  • Arduino101/Genuino101
  • Infrared LED 950nm
  • Resistor
  • Power source (USB will work)

Recommended hardware setup

Connect a circuit which looks like this:

 Digital                                            Ground
  pin 13

 +-----+     +------------+     +--------------+    |
 |     |     |            |     |              |    |  |
 |     +-----+ + IR LED - +-----+  73 Ohm Res  +----+--+-|
 |     |     |            |     |              |    |  |
 +-----+     +------------+     +--------------+    |

Installation

Download the ZIP and install using the Arduino IDE. Alternative installation instructions may be found here.

Usage

Pick a digital pin, get an IR LED, and get some .cf files.

You can get your .cf files from the lirc remote database or use lirc to generate your own.

Raw codes

Specify raw codes in an array of constant unsigned shorts and pass them into the sendRawCode function.

Raw codes must be provided in the form of an array in the format used by lirc under "begin raw_codes".

  #define _countof(_Array) (sizeof(_Array) / sizeof(_Array[0]))

  int GPIO_PIN = 13; // The pin your IRLED is using.

  const unsigned short  kanto_yu5_power[] = {
   9023,    4565,     533,     597,     490,     618,
    490,     618,     490,     618,     490,     618,
    490,     618,     490,     618,     490,     618,
    490,    1727,     533,    1727,     533,    1749,
    511,    1727,     511,    1727,     533,    1727,
    533,    1727,     533,    1727,     533,     597,
    490,     618,     490,    1749,     511,    1749,
    511,    1727,     533,     618,     490,     618,
    490,     618,     490,    1727,     533,    1727,
    511,     597,     490,     618,     490,     618,
    490,    1727,     533,    1727,     533,    1706,
    533
  };


  sendRawCodes(kanto_yu5_power, 
               _countof(kanto_yu5_power), 
               GPIO_PIN);

Remotes

Create a remote by filling up the LircRemote structure and then passing in your structure to the sendRemoteCode function.

  const LircRemote fedders_aircon = {
    .descriptions = (LRD_HEADER | LRD_ONE | LRD_ZERO | LRD_PTRAIL | LRD_REPEAT | LRD_GAP | LRD_TOGBITMASK ),
    .bits         = 32,
    .header = {8975, 4557},
    .one    = {505, 1723},
    .zero   = {505, 604},
    .ptrail = 512,
    .repeat = {8975, 2299},
    .toggle_bit_mask = 0,
    .button_codes = {
                //ON_OFF                   
                0x04FB40BF,
                //FAN_SPEED
                0x04FB58A7,
                //MINUS_TEMP_TIME
                0x04FB8877,
                //PLUS_TEMP_TIME 
                0x04FB50AF,
                //TIMER
                0x04FB9867,
                //MODE
                0x04FB906F
    }
  };


  enum AirconButton {
    ON_OFF = 0,
    FAN_SPEED,
    MINUS_TEMP_TIME,
    PLUS_TEMP_TIME,
    TIMER,
    MODE
  } AirconButton;

  int GPIO_PIN = 13; // The digital pin your IRLED is using.

  sendRemoteCode(&fedders_aircon, ON_OFF, GPIO_PIN);

Limitations

  • Currently a 38KHz signal is the only supported output frequency.
  • Only a subset of options in the "Remote" are suppoted.
  • Interrupts are not masked during the IR code playback operation, which means this library may not be very reliable if interrupts are being used heavily on the system.

License

BSD license. See LICENSE.

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