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/*---------------------------------------------------------------------------------------------------------------------------------------------------
* irmp-main-avr.c - demo main module to test IRMP decoder on AVR
*
* Copyright (c) 2009-2017 Frank Meyer - frank(at)fli4l.de
*
* $Id: irmp-main-avr.c,v 1.1 2016/01/12 11:55:05 fm Exp $
*
* This demo module is runnable on AVRs
*
* ATMEGA88 @ 8 MHz internal RC Osc with BODLEVEL 4.3V: lfuse: 0xE2 hfuse: 0xDC efuse: 0xF9
* ATMEGA88 @ 8 MHz external Crystal Osc with BODLEVEL 4.3V: lfuse: 0xFF hfuse: 0xDC efuse: 0xF9
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*---------------------------------------------------------------------------------------------------------------------------------------------------
*/
#include "irmp.h"
#ifndef F_CPU
#error F_CPU unknown
#endif
static void
timer1_init (void)
{
#if defined (__AVR_ATtiny45__) || defined (__AVR_ATtiny85__) // ATtiny45 / ATtiny85:
#if F_CPU >= 16000000L
OCR1C = (F_CPU / F_INTERRUPTS / 8) - 1; // compare value: 1/15000 of CPU frequency, presc = 8
TCCR1 = (1 << CTC1) | (1 << CS12); // switch CTC Mode on, set prescaler to 8
#else
OCR1C = (F_CPU / F_INTERRUPTS / 4) - 1; // compare value: 1/15000 of CPU frequency, presc = 4
TCCR1 = (1 << CTC1) | (1 << CS11) | (1 << CS10); // switch CTC Mode on, set prescaler to 4
#endif
#else // ATmegaXX:
OCR1A = (F_CPU / F_INTERRUPTS) - 1; // compare value: 1/15000 of CPU frequency
TCCR1B = (1 << WGM12) | (1 << CS10); // switch CTC Mode on, set prescaler to 1
#endif
#ifdef TIMSK1
TIMSK1 = 1 << OCIE1A; // OCIE1A: Interrupt by timer compare
#else
TIMSK = 1 << OCIE1A; // OCIE1A: Interrupt by timer compare
#endif
}
#ifdef TIM1_COMPA_vect // ATtiny84
#define COMPA_VECT TIM1_COMPA_vect
#else
#define COMPA_VECT TIMER1_COMPA_vect // ATmega
#endif
ISR(COMPA_VECT) // Timer1 output compare A interrupt service routine, called every 1/15000 sec
{
(void) irmp_ISR(); // call irmp ISR
// call other timer interrupt routines...
}
int
main (void)
{
IRMP_DATA irmp_data;
irmp_init(); // initialize IRMP
timer1_init(); // initialize timer1
sei (); // enable interrupts
for (;;)
{
if (irmp_get_data (&irmp_data))
{
; // got an IR message, do something
}
}
}
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