irsndmain.c

   1 /*---------------------------------------------------------------------------------------------------------------------------------------------------
   2  * irsndmain.c - demo main module to test irmp decoder
   3  *
   4  * Copyright (c) 2010-2011 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
  17 #include <inttypes.h>
  18 #include <avr/io.h>
  19 #include <util/delay.h>
  20 #include <avr/pgmspace.h>
  21 #include <avr/interrupt.h>
  22 #include "irmp.h"
  23 #include "irsndconfig.h"
  24 #include "irsnd.h"
  25
  26 #ifndef F_CPU
  27 #error F_CPU unkown
  28 #endif
  29
  30 void
  31 timer1_init (void)
  32 {
  33 #if defined (__AVR_ATtiny45__) || defined (__AVR_ATtiny85__)                // ATtiny45 / ATtiny85:
  34     OCR1A   =  (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 #else                                                                       // ATmegaXX:
  37     OCR1A   =  (F_CPU / F_INTERRUPTS) - 1;                                  // compare value: 1/15000 of CPU frequency
  38     TCCR1B  = (1 << WGM12) | (1 << CS10);                                   // switch CTC Mode on, set prescaler to 1
  39 #endif
  40
  41 #ifdef TIMSK1
  42     TIMSK1  = 1 << OCIE1A;                                                  // OCIE1A: Interrupt by timer compare
  43 #else
  44     TIMSK   = 1 << OCIE1A;                                                  // OCIE1A: Interrupt by timer compare
  45 #endif
  46 }
  47
  48 /*---------------------------------------------------------------------------------------------------------------------------------------------------
  49  * timer 1 compare handler, called every 1/10000 sec
  50  *---------------------------------------------------------------------------------------------------------------------------------------------------
  51  */
  52 ISR(TIMER1_COMPA_vect)
  53 {
  54     (void) irsnd_ISR();                                                     // call irsnd ISR
  55     // call other timer interrupt routines here...
  56 }
  57
  58 /*---------------------------------------------------------------------------------------------------------------------------------------------------
  59  * MAIN: main routine
  60  *---------------------------------------------------------------------------------------------------------------------------------------------------
  61  */
  62 int
  63 main (void)
  64 {
  65     IRMP_DATA irmp_data;
  66
  67     irsnd_init();                                                             // initialize irsnd
  68     timer1_init();                                                            // initialize timer
  69     sei ();                                                                   // enable interrupts
  70
  71     for (;;)
  72     {
  73         irmp_data.protocol = IRMP_NEC_PROTOCOL;
  74         irmp_data.address  = 0x00FF;
  75         irmp_data.command  = 0x0001;
  76         irmp_data.flags    = 0;
  77
  78         irsnd_send_data (&irmp_data, TRUE);
  79         _delay_ms (1000);
  80     }
  81 }