blob: de69818c8362c1fddf0683129dd2d017276b36e3 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
|
#include <avr/io.h>
#include <avr/interrupt.h>
#include <util/delay.h>
#include <util/setbaud.h>
#define LOCK_LED PB1
#define LOCK_BTN PD6
#define UNLOCK_BTN PD7
#define SYN 0xA1
#define FIN 0xB2
#define LOCK 0xC3
#define UNLOCK 0xD3
static void usart_init(void)
{
UBRR0H = UBRRH_VALUE;
UBRR0L = UBRRL_VALUE;
UCSR0B = (1 << TXEN0);
UCSR0C = (1 << UCSZ01) | (1 << UCSZ00);
}
static void usart_send(unsigned char data)
{
while (!(UCSR0A & (1 << UDRE0)))
;
UDR0 = data;
}
static inline void pcint2_init(void)
{
PCICR |= (1 << PCIE2);
PCMSK2 |= ((1 << PCINT22) | (1 << PCINT23));
}
static inline void lock(void)
{
PORTB |= (1 << LOCK_LED);
usart_send(SYN);
usart_send(LOCK);
usart_send(FIN);
}
static inline void unlock(void)
{
PORTB &= ~(1 << LOCK_LED);
usart_send(SYN);
usart_send(UNLOCK);
usart_send(FIN);
}
int main(void)
{
DDRB |= (1 << LOCK_LED);
PORTB |= (1 << LOCK_LED);
usart_init();
for (;;) {
_delay_ms(4000);
lock();
_delay_ms(4000);
unlock();
}
return 0;
}
|
