irsndmain.c

   1 /*---------------------------------------------------------------------------------------------------------------------------------------------------
   2  * irsndmain.c - demo main module to test irsnd encoder
   3  *
   4  * Copyright (c) 2010-2012 Frank Meyer - frank(at)fli4l.de
   5  *
   6  * ATMEGA88 @ 8 MHz
   7  *
   8  * Fuses: lfuse: 0xE2 hfuse: 0xDC efuse: 0xF9
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *---------------------------------------------------------------------------------------------------------------------------------------------------
  15  */
  16 #include "irsnd.h"
  17
  18 #ifndef F_CPU
  19 #  error F_CPU unkown
  20 #endif
  21
  22 void
  23 timer1_init (void)
  24 {
  25 #if defined (__AVR_ATtiny45__) || defined (__AVR_ATtiny85__)                // ATtiny45 / ATtiny85:
  26     OCR1C   =  (F_CPU / F_INTERRUPTS / 4) - 1;                              // compare value: 1/15000 of CPU frequency, presc = 4
  27     TCCR1   = (1 << CTC1) | (1 << CS11) | (1 << CS10);                      // switch CTC Mode on, set prescaler to 4
  28 #else                                                                       // ATmegaXX:
  29     OCR1A   =  (F_CPU / F_INTERRUPTS) - 1;                                  // compare value: 1/15000 of CPU frequency
  30     TCCR1B  = (1 << WGM12) | (1 << CS10);                                   // switch CTC Mode on, set prescaler to 1
  31 #endif
  32
  33 #ifdef TIMSK1
  34     TIMSK1  = 1 << OCIE1A;                                                  // OCIE1A: Interrupt by timer compare
  35 #else
  36     TIMSK   = 1 << OCIE1A;                                                  // OCIE1A: Interrupt by timer compare
  37 #endif
  38 }
  39
  40 /*---------------------------------------------------------------------------------------------------------------------------------------------------
  41  * timer 1 compare handler, called every 1/10000 sec
  42  *---------------------------------------------------------------------------------------------------------------------------------------------------
  43  */
  44 ISR(TIMER1_COMPA_vect)
  45 {
  46     (void) irsnd_ISR();                                                     // call irsnd ISR
  47     // call other timer interrupt routines here...
  48 }
  49
  50 /*---------------------------------------------------------------------------------------------------------------------------------------------------
  51  * MAIN: main routine
  52  *---------------------------------------------------------------------------------------------------------------------------------------------------
  53  */
  54 int
  55 main (void)
  56 {
  57     IRMP_DATA irmp_data;
  58
  59     irsnd_init();                                                             // initialize irsnd
  60     timer1_init();                                                            // initialize timer
  61     sei ();                                                                   // enable interrupts
  62
  63     for (;;)
  64     {
  65         irmp_data.protocol = IRMP_NEC_PROTOCOL;
  66         irmp_data.address  = 0x00FF;
  67         irmp_data.command  = 0x0001;
  68         irmp_data.flags    = 0;
  69
  70         irsnd_send_data (&irmp_data, TRUE);
  71         _delay_ms (1000);
  72     }
  73 }