Version 3.0.2

[irmp.git] / irmp-main-avr.c

/*---------------------------------------------------------------------------------------------------------------------------------------------------\r
 * irmp-main-avr.c - demo main module to test IRMP decoder on AVR\r
 *\r
 * Copyright (c) 2009-2016 Frank Meyer - frank(at)fli4l.de\r
 *\r
 * $Id: irmp-main-avr.c,v 1.2 2016/01/12 21:15:16 fm Exp $\r
 *\r
 * This demo module is runnable on AVRs\r
 *\r
 * ATMEGA88 @ 8 MHz internal RC      Osc with BODLEVEL 4.3V: lfuse: 0xE2 hfuse: 0xDC efuse: 0xF9\r
 * ATMEGA88 @ 8 MHz external Crystal Osc with BODLEVEL 4.3V: lfuse: 0xFF hfuse: 0xDC efuse: 0xF9\r
 *\r
 * This program is free software; you can redistribute it and/or modify\r
 * it under the terms of the GNU General Public License as published by\r
 * the Free Software Foundation; either version 2 of the License, or\r
 * (at your option) any later version.\r
 *---------------------------------------------------------------------------------------------------------------------------------------------------\r
 */\r
\r
#include "irmp.h"\r
\r
#ifndef F_CPU\r
#error F_CPU unknown\r
#endif\r
\r
static void\r
timer1_init (void)\r
{\r
#if defined (__AVR_ATtiny45__) || defined (__AVR_ATtiny85__)                // ATtiny45 / ATtiny85:\r
\r
#if F_CPU >= 16000000L\r
    OCR1C   =  (F_CPU / F_INTERRUPTS / 8) - 1;                              // compare value: 1/15000 of CPU frequency, presc = 8\r
    TCCR1   = (1 << CTC1) | (1 << CS12);                                    // switch CTC Mode on, set prescaler to 8\r
#else\r
    OCR1C   =  (F_CPU / F_INTERRUPTS / 4) - 1;                              // compare value: 1/15000 of CPU frequency, presc = 4\r
    TCCR1   = (1 << CTC1) | (1 << CS11) | (1 << CS10);                      // switch CTC Mode on, set prescaler to 4\r
#endif\r
\r
#else                                                                       // ATmegaXX:\r
    OCR1A   =  (F_CPU / F_INTERRUPTS) - 1;                                  // compare value: 1/15000 of CPU frequency\r
    TCCR1B  = (1 << WGM12) | (1 << CS10);                                   // switch CTC Mode on, set prescaler to 1\r
#endif\r
\r
#ifdef TIMSK1\r
    TIMSK1  = 1 << OCIE1A;                                                  // OCIE1A: Interrupt by timer compare\r
#else\r
    TIMSK   = 1 << OCIE1A;                                                  // OCIE1A: Interrupt by timer compare\r
#endif\r
}\r
\r
#ifdef TIM1_COMPA_vect                                                      // ATtiny84\r
#define COMPA_VECT  TIM1_COMPA_vect\r
#else\r
#define COMPA_VECT  TIMER1_COMPA_vect                                       // ATmega\r
#endif\r
\r
ISR(COMPA_VECT)                                                             // Timer1 output compare A interrupt service routine, called every 1/15000 sec\r
{\r
  (void) irmp_ISR();                                                        // call irmp ISR\r
  // call other timer interrupt routines...\r
}\r
\r
int\r
main (void)\r
{\r
    IRMP_DATA   irmp_data;\r
\r
    irmp_init();                                                            // initialize IRMP\r
    timer1_init();                                                          // initialize timer1\r
\r
    sei ();                                                                 // enable interrupts\r
\r
    for (;;)\r
    {\r
        if (irmp_get_data (&irmp_data))\r
        {\r
            ;                                                               // got an IR message, do something\r
        }\r
    }\r
}\r