main.c

   1 /*---------------------------------------------------------------------------------------------------------------------------------------------------
   2  * main.c - demo main module to test irmp decoder
   3  *
   4  * Copyright (c) 2009-2012 Frank Meyer - frank(at)fli4l.de
   5  *
   6  * $Id: main.c,v 1.14 2012/05/15 10:25:21 fm Exp $
   7  *
   8  * ATMEGA88 @ 8 MHz
   9  *
  10  * Fuses: lfuse: 0xE2 hfuse: 0xDC efuse: 0xF9
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *---------------------------------------------------------------------------------------------------------------------------------------------------
  17  */
  18
  19 #include "irmp.h"
  20
  21 #ifndef F_CPU
  22 #error F_CPU unkown
  23 #endif
  24
  25 void
  26 timer1_init (void)
  27 {
  28 #if defined (__AVR_ATtiny45__) || defined (__AVR_ATtiny85__)                // ATtiny45 / ATtiny85:
  29
  30 #if F_CPU >= 16000000L
  31     OCR1C   =  (F_CPU / F_INTERRUPTS / 8) - 1;                              // compare value: 1/15000 of CPU frequency, presc = 8
  32     TCCR1   = (1 << CTC1) | (1 << CS12);                                    // switch CTC Mode on, set prescaler to 8
  33 #else
  34     OCR1C   =  (F_CPU / F_INTERRUPTS / 4) - 1;                              // compare value: 1/15000 of CPU frequency, presc = 4
  35     TCCR1   = (1 << CTC1) | (1 << CS11) | (1 << CS10);                      // switch CTC Mode on, set prescaler to 4
  36 #endif
  37
  38 #else                                                                       // ATmegaXX:
  39     OCR1A   =  (F_CPU / F_INTERRUPTS) - 1;                                  // compare value: 1/15000 of CPU frequency
  40     TCCR1B  = (1 << WGM12) | (1 << CS10);                                   // switch CTC Mode on, set prescaler to 1
  41 #endif
  42
  43 #ifdef TIMSK1
  44     TIMSK1  = 1 << OCIE1A;                                                  // OCIE1A: Interrupt by timer compare
  45 #else
  46     TIMSK   = 1 << OCIE1A;                                                  // OCIE1A: Interrupt by timer compare
  47 #endif
  48 }
  49
  50 /*---------------------------------------------------------------------------------------------------------------------------------------------------
  51  * Timer 1 output compare A interrupt service routine, called every 1/15000 sec
  52  *---------------------------------------------------------------------------------------------------------------------------------------------------
  53  */
  54 #ifdef TIM1_COMPA_vect                                                      // ATtiny84
  55 ISR(TIM1_COMPA_vect)
  56 #else
  57 ISR(TIMER1_COMPA_vect)
  58 #endif
  59 {
  60   (void) irmp_ISR();                                                        // call irmp ISR
  61   // call other timer interrupt routines...
  62 }
  63
  64
  65 int
  66 main (void)
  67 {
  68     IRMP_DATA irmp_data;
  69
  70     irmp_init();                                                            // initialize irmp
  71     timer1_init();                                                          // initialize timer 1
  72     sei ();                                                                 // enable interrupts
  73
  74     for (;;)
  75     {
  76         if (irmp_get_data (&irmp_data))
  77         {
  78             // ir signal decoded, do something here...
  79             // irmp_data.protocol is the protocol, see irmp.h
  80             // irmp_data.address is the address/manufacturer code of ir sender
  81             // irmp_data.command is the command code
  82             // irmp_protocol_names[irmp_data.protocol] is the protocol name (if enabled, see irmpconfig.h)
  83         }
  84     }
  85 }