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
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
|
/* Lock front, connected to the fingerprint scanner */
#include <stdint.h>
#include <stdlib.h>
#include <avr/wdt.h>
#include <avr/sleep.h>
#include <avr/interrupt.h>
#include <util/delay.h>
#include "fpm.h"
#include "nrfm.h"
#include "util.h"
#define LOCK_PIN PD3
#define UNLOCK_PIN PD2
#define ENROLL_PIN PD4
#define RX_IRQ_PIN PC0
#define RX_DDR DDRC
#define RX_PIN PINC
#define RX_ICR PCICR
#define RX_IE PCIE1
#define RX_INT PCINT8
#define RX_MSK PCMSK1
#define RX_INTVEC PCINT1_vect
#define VCC_MIN 4000
static volatile uint8_t rxd = 0;
static volatile uint8_t sync = 0;
static volatile uint8_t islock = 0;
static volatile uint8_t isunlock = 0;
static inline void wdt_off(void)
{
cli();
wdt_reset();
MCUSR &= ~(1 << WDRF);
WDTCSR |= (1 << WDCE) | (1 << WDE);
WDTCSR = 0x00;
}
static inline void init_rx(void)
{
RX_DDR &= ~(1 << RX_IRQ_PIN);
RX_ICR |= (1 << RX_IE);
RX_MSK |= (1 << RX_INT);
}
static inline void init_btns(void)
{
DDRD &= ~((1 << LOCK_PIN) | (1 << UNLOCK_PIN));
PORTD |= ((1 << LOCK_PIN) | (1 << UNLOCK_PIN));
EICRA = 0b00000000;
EIMSK = (1 << INT0) | (1 << INT1);
}
int main(void)
{
int i, retries;
uint8_t rxaddr[ADDRLEN] = { 194, 178, 82 };
uint8_t txaddr[ADDRLEN] = { 194, 178, 83 };
char buf[WDLEN], key[WDLEN];
wdt_off();
led_init();
fpm_init();
init_rx();
init_btns();
radio_init(rxaddr);
sei();
radio_listen();
for (;;) {
if (!sync && (islock || isunlock)) {
if (isunlock) {
if (!fpm_match()) {
isunlock = 0;
continue;
}
}
xor(KEY, SYN, buf, WDLEN);
retries = 0;
do {
sync = radio_sendto(txaddr, buf, WDLEN);
retries++;
led_bat();
_delay_ms(50);
} while (!sync && retries < 40);
if (!sync) {
islock = 0;
isunlock = 0;
}
}
if (rxd) {
radio_recv(buf, WDLEN);
rxd = 0;
if (sync && (islock || isunlock)) {
sync = 0;
xor(KEY, buf, key, WDLEN);
if (islock) {
islock = 0;
xor(key, LOCK, buf, WDLEN);
if (radio_sendto(txaddr, buf, WDLEN))
led_locked();
} else if (isunlock) {
isunlock = 0;
xor(key, UNLOCK, buf, WDLEN);
if (radio_sendto(txaddr, buf, WDLEN))
led_unlocked();
}
}
}
if (!sync) {
if (getvcc() < VCC_MIN) {
for (i = 0; i < 5; i++) {
led_bat();
_delay_ms(100);
}
}
radio_pwr_dwn();
sleep_bod_disable();
set_sleep_mode(SLEEP_MODE_PWR_DOWN);
sleep_mode();
radio_listen();
}
}
return 0;
}
ISR(RX_INTVEC)
{
if (!(RX_PIN & (1 << RX_IRQ_PIN)))
rxd = 1;
}
ISR(INT0_vect)
{
sync = 0;
isunlock = 1;
}
ISR(INT1_vect)
{
if (is_btn_pressed(PIND, LOCK_PIN)) {
sync = 0;
islock = 1;
}
}
ISR(PCINT2_vect)
{
if (is_btn_pressed(PIND, ENROLL_PIN)) {
// enroll
}
}
|
