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mirror of https://github.com/binary-kitchen/doorlockd synced 2024-10-31 22:47:05 +01:00
doorlockd-mirror/avr-code/main.c
2015-06-08 21:49:19 +02:00

144 lines
2.5 KiB
C

/* 2015, Ralf Ramsauer
* ralf@binary-kitchen.de
*/
#include <avr/io.h>
#include <avr/interrupt.h>
#include <util/delay.h>
#include <avr/sleep.h>
#include <string.h>
#define GREEN_ON (PORTB &= ~(1<<PB1))
#define GREEN_OFF (PORTB |= (1<<PB1))
#define RED_ON (PORTB &= ~(1<<PB0))
#define RED_OFF (PORTB |= (1<<PB0))
#define DOORLIGHT_ON (PORTD &= ~(1<<PD6))
#define DOORLIGHT_OFF (PORTD |= (1<<PD6))
#define OPEN_BOLZEN (PORTD &= ~(1<<PD4))
#define CLOSE_BOLZEN (PORTD |= (1<<PD4))
#define OPEN_SCHNAPPER (PORTD |= (1<<PD5))
#define CLOSE_SCHNAPPER (PORTD &= ~(1<<PD5))
#define IS_RESCUE (!(PIND & (1<<PD3)))
#define IS_SWITCH (!(PIND & (1<<PD2)))
static uint8_t open = 0;
static uint8_t klacker = 0;
void open_door()
{
RED_OFF;
GREEN_ON;
OPEN_BOLZEN;
DOORLIGHT_ON;
}
void close_door()
{
RED_ON;
GREEN_OFF;
DOORLIGHT_OFF;
CLOSE_SCHNAPPER;
CLOSE_BOLZEN;
}
void schnapper(unsigned int i)
{
OPEN_SCHNAPPER;
while (i--) {
_delay_ms(1000);
}
CLOSE_SCHNAPPER;
_delay_ms(100);
}
ISR(USI_OVERFLOW_vect)
{
// Clear interrupt flag
USISR |= (1<<USIOIF);
// Reset counter
TCNT1 = 0;
open = 1;
uint8_t in = USIDR;
// Depending on the clock, a klacker either can be 10101010 or 01010101
if (in == 0x55 || in == 0xAA)
{
klacker = 1;
}
}
ISR(TIMER1_OVF_vect)
{
open = 0;
}
int main(void) {
// disable all interrupts
cli();
// PD4-6 as Output
DDRD = (1<<PD5)|(1<<PD4)|(1<<PD6);
// PD2,3 Pullup
PORTD |= (1<<PD2)|(1<<PD3);
// PB0-1 as Output
DDRB = (1<<PB0)|(1<<PB1);
// PB5,7 Pullup
PORTB |= (1<<PB7)|(1<<PB5);
// first action: close door
close_door();
// Configure USI
USICR = (1<<USICS1) | (1<<USIOIE) | (1<<USIWM0);
// Configure Timer
TIMSK |= (1<<TOIE1);
TIFR |= (1<<TOV1);
TCNT1 = 0;
TCCR1A = 0;
TCCR1B = (1<<CS01)|(1<<CS00);
// wait a bit to settle down
_delay_ms(1000);
// enable interrupts
sei();
for(;;) {
if (open == 0) {
close_door();
} else if (open == 1) {
open_door();
if (klacker == 1)
{
schnapper(3);
klacker = 0;
}
}
if (IS_RESCUE) {
cli();
open_door();
schnapper(3);
sei();
} else if (IS_SWITCH && open == 0) {
_delay_ms(300);
if(IS_SWITCH && open == 0) {
cli();
open_door();
schnapper(5);
sei();
}
}
_delay_ms(50);
}
return 0;
}