200 lines
6.1 KiB
C
200 lines
6.1 KiB
C
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#include <util/delay.h>
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#include <avr/io.h>
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#include <avr/pgmspace.h>
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#include <avr/interrupt.h>
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#include <string.h>
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#define HZ 15625ULL
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#define TIMEOUT_SEC 4
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#define MIN_PULSE_WIDTH_MS 100
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#define RING_DURATION_SEC 20
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#define OPEN_DURATION_SEC 3
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#define THURSDAY_TIMEOUT_MIN 300UL
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#define THURSDAY_OPEN_DELAY 750UL
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#define PRESSED_MIN_MS 50UL
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#define RELEASED_MIN_MS 50UL
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static uint8_t global_thursday_mode = 0;
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static uint16_t global_thursday_timectr_sec = 0;
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void tx_str(const char * PROGMEM s) {
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uint8_t c;
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while ((c = pgm_read_byte(s++))) {
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while (!(UCSR0A & (1<<UDRE0))) ;
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UDR0 = c;
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}
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}
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void tx_help(void) {
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tx_str(PSTR("Klingeldings v0.23\r\n"));
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tx_str(PSTR("Questions? ask <jaseg@jaseg.net>\r\n"));
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tx_str(PSTR("Echo is disabled.\r\n\r\n"));
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tx_str(PSTR("Notifications are sent on their own line using the format \"CODE Human-readable explanation\\r\\n\".\r\n"));
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tx_str(PSTR("The notifications types are (the following occurences have been nerfed using backspaces):\r\n"));
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tx_str(PSTR(" T \bHUA Thursday mode auto open\r\n"));
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tx_str(PSTR(" R \bING Ringing\r\n"));
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tx_str(PSTR(" C \bODE Code access granted\r\n"));
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tx_str(PSTR(" T \bHU1 Thursday mode set to on\r\n"));
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tx_str(PSTR(" T \bHU0 Thursday mode set to off\r\n"));
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tx_str(PSTR(" B \bOOT Device booted.\r\n\r\n"));
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tx_str(PSTR(" O \bPEN Manual open\r\n"));
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tx_str(PSTR("Commands must be sent on their own line. Available commands:\r\n"));
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tx_str(PSTR(" open - Opens the door\r\n"));
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tx_str(PSTR(" thursday on - Mutes the ringer and turns on auto opening \r\n"));
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tx_str(PSTR(" thursday off - Unmutes the ringer and turns off auto opening\r\n\r\n"));
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}
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void open(void) {
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PORTC |= 0x02; /* Opener relay */
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/* wait and blink for a few seconds */
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for (uint8_t i=0; i<4*OPEN_DURATION_SEC; i++) {
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PORTB ^= 0x20; /* LED */
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_delay_ms(250);
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}
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PORTC &= ~0x02; /* Opener relay */
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}
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uint8_t handle_open_button(void) {
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if (PINC&0x20)
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return 0;
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tx_str(PSTR("OPEN Manual open\r\n"));
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open();
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return 1;
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}
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void ring(void) {
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tx_str(PSTR("RING Ringing\r\n"));
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PORTB |= 0x20;
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PORTC |= 0x04;
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for (uint16_t i=0; i<RING_DURATION_SEC*100 && !handle_open_button() && (PINC&1); i++)
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_delay_ms(10);
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PORTB &= ~0x20;
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PORTC &= ~0x04;
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}
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void code(void) {
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tx_str(PSTR("CODE Code access granted\r\n"));
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open();
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}
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void set_thursday_mode(uint8_t mode) {
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global_thursday_mode = mode;
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global_thursday_timectr_sec = 0;
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tx_str(mode ? PSTR("THU1 Thursday mode set to on\r\n") : PSTR("THU0 Thursday mode set to off\r\n"));
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if (mode)
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PORTC |= 0x10;
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else
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PORTC &= ~0x10;
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}
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ISR (USART_RX_vect) {
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static uint8_t idx = 0;
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static char rxbuf[16];
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char ch = UDR0;
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if (idx < sizeof(rxbuf)/sizeof(rxbuf[0]))
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rxbuf[idx++] = ch;
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else
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idx = 255;
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if (ch == '\r' || ch == '\n') {
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idx = 0;
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if (!strcmp("open\r", rxbuf))
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open();
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else if (!strcmp("help\r", rxbuf))
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tx_help();
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else if (!strcmp("thursday on\r", rxbuf))
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set_thursday_mode(1);
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else if (!strcmp("thursday off\r", rxbuf))
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set_thursday_mode(0);
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}
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}
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int main(void) {
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/* IO map:
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* A0/PC0 IN ringer relay
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* A1/PC1 OUT opener relay
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* A2/PC2 OUT ringer signal
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* A3/PC3 IN thursday mode toggle
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* A4/PC4 OUT thursday mode signal
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*/
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/* use 115200Bd */
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UBRR0H = 0;
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UBRR0L = 16;
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UCSR0A = (1<<U2X0);
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UCSR0B = (1<<RXEN0) | (1<<TXEN0) | (1<<RXCIE0);
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UCSR0C = (1<<UCSZ01) | (1<<UCSZ00);
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DDRD |= 0x02; /* TX */
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TCCR1B = 0x05; /* prescaler=1024 -> 3906.25Hz */
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PORTC |= 0x01; /* Ringer relay input */
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DDRC |= 0x02; /* Opener relay output */
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DDRC |= 0x04; /* Doorbell button output */
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PORTC |= 0x08; /* Thursday mode toggle */
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DDRC |= 0x10; /* Thursday mode signal */
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PORTC |= 0x20; /* Opener button */
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DDRB |= 0x20; /* Status LED */
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sei();
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_delay_ms(500);
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tx_help();
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tx_str(PSTR("BOOT Device booted.\r\n"));
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uint16_t pattern[7];
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uint8_t pidx = 0;
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uint8_t thursday_toggle_timeout = 0;
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uint8_t codefail = 0;
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for (;;) {
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handle_open_button();
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if (!(PINC&0x08) && !thursday_toggle_timeout) { /* Thursday button */
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set_thursday_mode(!global_thursday_mode);
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thursday_toggle_timeout = 1;
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TCNT1 = 0;
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}
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if (TCNT1 > TIMEOUT_SEC*HZ) { /* Doorbell button timeout */
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if (pidx != 0 || codefail)
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ring();
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pidx = 0;
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codefail = 0;
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thursday_toggle_timeout = 0;
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TCNT1 = 0;
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global_thursday_timectr_sec += TIMEOUT_SEC;
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if (global_thursday_timectr_sec >= THURSDAY_TIMEOUT_MIN*60UL) {
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tx_str(PSTR("TOUT Thursday mode timeout\r\n"));
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set_thursday_mode(0);
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}
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} else {
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uint8_t st = PINC&1;
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if (global_thursday_mode && !st) {
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tx_str(PSTR("THUA Thursday mode auto open\r\n"));
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_delay_ms(THURSDAY_OPEN_DELAY);
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open();
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} else if (st == (pidx&1)) {
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uint16_t val = TCNT1;
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if (val > HZ*MIN_PULSE_WIDTH_MS/1000ULL) {
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pattern[pidx++] = val;
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TCNT1 = 0;
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if (pidx == sizeof(pattern)/sizeof(pattern[0])-1) {
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pidx = 0;
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if(( PRESSED_MIN_MS*HZ/1000 <= pattern[1])
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&& (RELEASED_MIN_MS*HZ/1000 <= pattern[2])
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&& ( PRESSED_MIN_MS*HZ/1000 <= pattern[3])
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&& (RELEASED_MIN_MS*HZ/1000 <= pattern[4])
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&& ( PRESSED_MIN_MS*HZ/1000 <= pattern[5])
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&& (RELEASED_MIN_MS*HZ/1000 <= pattern[6]))
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codefail = (code(), 0);
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else
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codefail = 1;
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}
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}
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}
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}
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}
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}
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