static void
ow_timer_init(void)
{
timer1_mode_normal();
timer1_clock_off();
timer1_count_set(0);
timer1_compare_a_set(0xffff);
timer1_interrupt_a_enable();
}
int
door_main(void)
{
serial_init(9600, 8e2);
pin_mode_output(PIN_RFID_ENABLE);
pin_mode_input(PIN_CLK); /* clk */
pin_mode_input(PIN_DATA); /* data */
pin_mode_output(PIN_GREEN_LED); /* green led lock */
pin_mode_output(PIN_YELLOW_LED); /* yellow led lock */
pin_mode_output(PIN_OPEN_LOCK); /* open */
pin_mode_output(PIN_DAYMODE); /* stay open */
pin_mode_output(PIN_STATUS_LED); /* yellow status */
pin_high(PIN_OPEN_LOCK);
pin_high(PIN_DAYMODE);
pin_high(PIN_GREEN_LED);
pin_high(PIN_YELLOW_LED);
/* trigger pin2 interrupt when the clock
* signal goes high */
pin2_interrupt_mode_rising();
pin2_interrupt_enable();
data_reset();
/* setup timer1 to trigger interrupt a 4 times a second */
timer1_mode_ctc();
timer1_compare_a_set(62499);
timer1_clock_d64();
timer1_interrupt_a_enable();
softserial_init();
pin_mode_output(PIN_RFID_ENABLE);
pin_low(PIN_RFID_ENABLE);
init_mfrc522();
sleep_mode_idle();
while (1) {
/*
* sleep if no new events need to be handled
* while avoiding race conditions. see
* http://www.nongnu.org/avr-libc/user-manual/group__avr__sleep.html
*/
cli();
if (events == EV_NONE && !ev_softserial) {
sleep_enable();
sei();
sleep_cpu();
sleep_disable();
continue;
}
sei();
if (events & EV_SERIAL) {
handle_serial_input();
continue;
}
if (ev_softserial) {
handle_rfid_input();
}
events &= ~EV_DATA;
if (cnt > 0 && data[cnt - 1] == 0xB4) {
if (cnt >= 10) {
struct sha1_context ctx;
char digest[SHA1_DIGEST_LENGTH];
sha1_init(&ctx);
sha1_update(&ctx, (char *)data, 256);
sha1_final(&ctx, digest);
serial_print("HASH+");
serial_hexdump(digest, SHA1_DIGEST_LENGTH);
serial_print("\n");
}
data_reset();
continue;
}
if (events & EV_TIME)
{
char buf[20];
uint8_t len;
len = check_mfrc522(buf, sizeof(buf));
handle_mfr_input(buf, len);
}
events &= ~EV_TIME;
/*
This code can be used during development, to simulate the
press of the '#' button 8 seconds after every idle timeout:
if (second == 32 && cnt < 255)
{
data[cnt] = 0xB4;
cnt++;
events |= EV_DATA;
}
*/
if (second > 10*4) {
serial_print("ALIVE\n");
second = 0;
data_reset();
continue;
}
}
}