main.c

   1 /*---------------------------------------------------------------------------------------------------------------------------------------------------
   2  * main.c - demo main module to test irmp decoder
   3  *
   4  * Copyright (c) 2009-2011 Frank Meyer - frank(at)fli4l.de
   5  *
   6  * $Id: main.c,v 1.12 2012/02/13 10:59:07 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 <inttypes.h>
  20 #include <avr/io.h>
  21 #include <util/delay.h>
  22 #include <avr/pgmspace.h>
  23 #include <avr/interrupt.h>
  24
  25 #include "irmpconfig.h"
  26 #include "irmp.h"
  27
  28 #ifndef F_CPU
  29 #error F_CPU unkown
  30 #endif
  31
  32 void
  33 timer1_init (void)
  34 {
  35 #if defined (__AVR_ATtiny45__) || defined (__AVR_ATtiny85__)                // ATtiny45 / ATtiny85:
  36
  37 #if F_CPU >= 16000000L
  38     OCR1C   =  (F_CPU / F_INTERRUPTS / 8) - 1;                              // compare value: 1/15000 of CPU frequency, presc = 8
  39     TCCR1   = (1 << CTC1) | (1 << CS12);                                    // switch CTC Mode on, set prescaler to 8
  40 #else
  41     OCR1C   =  (F_CPU / F_INTERRUPTS / 4) - 1;                              // compare value: 1/15000 of CPU frequency, presc = 4
  42     TCCR1   = (1 << CTC1) | (1 << CS11) | (1 << CS10);                      // switch CTC Mode on, set prescaler to 4
  43 #endif
  44
  45 #else                                                                       // ATmegaXX:
  46     OCR1A   =  (F_CPU / F_INTERRUPTS) - 1;                                  // compare value: 1/15000 of CPU frequency
  47     TCCR1B  = (1 << WGM12) | (1 << CS10);                                   // switch CTC Mode on, set prescaler to 1
  48 #endif
  49
  50 #ifdef TIMSK1
  51     TIMSK1  = 1 << OCIE1A;                                                  // OCIE1A: Interrupt by timer compare
  52 #else
  53     TIMSK   = 1 << OCIE1A;                                                  // OCIE1A: Interrupt by timer compare
  54 #endif
  55 }
  56
  57 /*---------------------------------------------------------------------------------------------------------------------------------------------------
  58  * Timer 1 output compare A interrupt service routine, called every 1/15000 sec
  59  *---------------------------------------------------------------------------------------------------------------------------------------------------
  60  */
  61 #ifdef TIM1_COMPA_vect                                                      // ATtiny84
  62 ISR(TIM1_COMPA_vect)
  63 #else
  64 ISR(TIMER1_COMPA_vect)
  65 #endif
  66 {
  67   (void) irmp_ISR();                                                        // call irmp ISR
  68   // call other timer interrupt routines...
  69 }
  70
  71
  72 int
  73 main (void)
  74 {
  75     IRMP_DATA irmp_data;
  76
  77     irmp_init();                                                            // initialize irmp
  78     timer1_init();                                                          // initialize timer 1
  79     sei ();                                                                 // enable interrupts
  80
  81     for (;;)
  82     {
  83         if (irmp_get_data (&irmp_data))
  84         {
  85             // ir signal decoded, do something here...
  86             // irmp_data.protocol is the protocol, see irmp.h
  87             // irmp_data.address is the address/manufacturer code of ir sender
  88             // irmp_data.command is the command code
  89             // irmp_protocol_names[irmp_data.protocol] is the protocol name (if enabled, see irmpconfig.h)
  90         }
  91     }
  92 }