82 lines
1.7 KiB
C
82 lines
1.7 KiB
C
/* Copyright © 2020 tyrolyean
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#define F_CPU 16000000UL
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <avr/wdt.h>
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#include <util/delay.h>
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#include <avr/interrupt.h>
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uint8_t mcusr_mirror __attribute__ ((section (".noinit")));
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void get_mcusr(void) \
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__attribute__((naked)) \
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__attribute__((section(".init3")));
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void get_mcusr(void)
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{
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mcusr_mirror = MCUSR;
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MCUSR = 0;
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wdt_disable();
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}
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int routine();
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int main(){
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/* Disable interrupts during initialisation phase */
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cli();
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DDRF = 0xFF;
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DDRK |= (0x01<<0);
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PORTF = 0x00;
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PORTK |= (0x01<<0);
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sei();
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/* Enable the hardware watchdog. In case the microcontroller fails to
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* finish it's task within the specified time, the watchdog will reset
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* the atmel cookie.
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*/
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wdt_enable(WDTO_1S);
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while(1){
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wdt_reset();
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if(routine() < 0){
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}
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}
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return 0;
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}
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int routine(){
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/* Produces a sawtooth */
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#if 0
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PORTE &= ~(0x01<<4);
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PORTF += 0x01;
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PORTE |= (0x01<<4);
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_delay_us(1);
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#endif
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PORTK &= ~(0x01<<0);
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PORTF += 0x01;
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PORTK |= (0x01<<0);
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_delay_us(1);
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return 0;
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}
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