irsndmain.c

   1 /*---------------------------------------------------------------------------------------------------------------------------------------------------
   2  * irsndmain.c - demo main module to test IRSND encoder on AVRs
   3  *
   4  * Copyright (c) 2010-2015 Frank Meyer - frank(at)fli4l.de
   5  *
   6  * ATMEGA88 @ 8 MHz internal RC      Osc with BODLEVEL 4.3V: lfuse: 0xE2 hfuse: 0xDC efuse: 0xF9
   7  * ATMEGA88 @ 8 MHz external Crystal Osc with BODLEVEL 4.3V: lfuse: 0xFF hfuse: 0xDC efuse: 0xF9
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *---------------------------------------------------------------------------------------------------------------------------------------------------
  14  */
  15 #include "irsnd.h"
  16
  17 #ifndef F_CPU
  18 #  error F_CPU unknown
  19 #endif
  20
  21 void
  22 timer1_init (void)
  23 {
  24 #if defined (__AVR_ATtiny45__) || defined (__AVR_ATtiny85__)                // ATtiny45 / ATtiny85:
  25     OCR1C   =  (F_CPU / F_INTERRUPTS / 4) - 1;                              // compare value: 1/15000 of CPU frequency, presc = 4
  26     TCCR1   = (1 << CTC1) | (1 << CS11) | (1 << CS10);                      // switch CTC Mode on, set prescaler to 4
  27 #else                                                                       // ATmegaXX:
  28     OCR1A   =  (F_CPU / F_INTERRUPTS) - 1;                                  // compare value: 1/15000 of CPU frequency
  29     TCCR1B  = (1 << WGM12) | (1 << CS10);                                   // switch CTC Mode on, set prescaler to 1
  30 #endif
  31
  32 #ifdef TIMSK1
  33     TIMSK1  = 1 << OCIE1A;                                                  // OCIE1A: Interrupt by timer compare
  34 #else
  35     TIMSK   = 1 << OCIE1A;                                                  // OCIE1A: Interrupt by timer compare
  36 #endif
  37 }
  38
  39 #ifdef TIM1_COMPA_vect                                                      // ATtiny84
  40 #define COMPA_VECT  TIM1_COMPA_vect
  41 #else
  42 #define COMPA_VECT  TIMER1_COMPA_vect                                       // ATmega
  43 #endif
  44
  45 /*---------------------------------------------------------------------------------------------------------------------------------------------------
  46  * timer 1 compare handler, called every 1/10000 sec
  47  *---------------------------------------------------------------------------------------------------------------------------------------------------
  48  */
  49 ISR(COMPA_VECT)                                                             // Timer1 output compare A interrupt service routine, called every 1/15000 sec
  50 {
  51     (void) irsnd_ISR();                                                     // call irsnd ISR
  52     // call other timer interrupt routines here...
  53 }
  54
  55 /*---------------------------------------------------------------------------------------------------------------------------------------------------
  56  * MAIN: main routine
  57  *---------------------------------------------------------------------------------------------------------------------------------------------------
  58  */
  59 int
  60 main (void)
  61 {
  62     IRMP_DATA irmp_data;
  63
  64     irsnd_init();                                                           // initialize irsnd
  65     timer1_init();                                                          // initialize timer
  66     sei ();                                                                 // enable interrupts
  67
  68     for (;;)
  69     {
  70         irmp_data.protocol = IRMP_NEC_PROTOCOL;                             // use NEC protocol
  71         irmp_data.address  = 0x00FF;                                        // set address to 0x00FF
  72         irmp_data.command  = 0x0001;                                        // set command to 0x0001
  73         irmp_data.flags    = 0;                                             // don't repeat frame
  74
  75         irsnd_send_data (&irmp_data, TRUE);                                 // send frame, wait for completion
  76         _delay_ms (1000);
  77     }
  78 }