From 276856de6c63bbbf3e56cc08dcca00ba10080b7e Mon Sep 17 00:00:00 2001
From: Sadeep Madurange <sadeep@asciimx.com>
Date: Sun, 7 Sep 2025 17:04:34 +0800
Subject: Door lock with MOSFETs and and without RFM.

---
 lock/server.c | 191 ----------------------------------------------------------
 1 file changed, 191 deletions(-)
 delete mode 100644 lock/server.c

(limited to 'lock/server.c')

diff --git a/lock/server.c b/lock/server.c
deleted file mode 100644
index 6d51c00..0000000
--- a/lock/server.c
+++ /dev/null
@@ -1,191 +0,0 @@
-/* Lock back, connected to the servo */
-
-#include <stdint.h>
-#include <string.h>
-
-#include <avr/wdt.h>
-#include <avr/sleep.h>
-#include <avr/interrupt.h>
-#include <util/delay.h>
-
-#include "nrfm.h"
-#include "util.h"
-
-#define PWM_MIN       500
-#define PWM_MID       1500
-#define PWM_MAX       2500
-#define PWM_TOP       20000
-
-#define SERVO_PIN     PB1
-#define LOCK_PIN      PD3
-#define UNLOCK_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 char tab[] = {
-	'0', '8', '3', '6', 'a', 'Z', '$', '4', 'v', 'R', '@',
-	'E', '1', 'o', '#', ')', '2', '5', 'q', ';', '.', 'I',
-	'c', '7', '9', '*', 'L', 'V', '&', 'k', 'K', '!', 'm',
-	'N', '(', 'O', 'Q', 'A', '>', 'T', 't', '?', 'S', 'h',
-	'w', '/', 'n', 'W', 'l', 'M', 'e', 'H', 'j', 'g', '[',
-	'P', 'f', ':', 'B', ']', 'Y', '^', 'F', '%', 'C', 'x'
-};
-
-static volatile uint8_t rxd = 0;
-static uint16_t tablen = sizeof(tab) / sizeof(tab[0]);
-
-static inline void keygen(char *buf, uint8_t n)
-{
-	int i, imax;
-	uint8_t sreg;
-	uint16_t seed; 
-	
-	sreg = SREG;
-	cli();
-	seed = TCNT1; 
-	SREG = sreg;
-
-	for (i = 0, imax = n - 1; i < imax; i++, seed++)
-		buf[i] = tab[(seed % tablen)];
-	buf[imax] = '\0';
-}
-
-static inline void keydel(char *buf, uint8_t n)
-{
-	int i;
-
-	for (i = 0; i < n; i++)
-		buf[i] = 0;
-}
-
-static inline void init_wdt(void)
-{
-	cli();
-	wdt_reset();
-
-	WDTCSR |= (1 << WDCE) | ( 1 << WDE); 
-	WDTCSR = (1 << WDE) | (1 << WDP1);    /* reset after 64ms */
-}
-
-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 << INT1);
-
-	PCICR |= (1 << PCIE2);
-	PCMSK2 |= (1 << PCINT20);
-}
-
-static inline void init_servo(void)
-{
-	ICR1 = PWM_TOP;
-	TCCR1A |= (1 << WGM11) | (1 << COM1A1);
-	TCCR1B |= (1 << WGM13) | (1 << CS11);
-
-	DDRB |= (1 << SERVO_PIN);
-}
-
-static inline void lock(void)
-{
-	OCR1A = PWM_MID;
-	_delay_ms(100);
-	OCR1A = PWM_TOP;
-}
-
-static inline void unlock(void)
-{
-	OCR1A = PWM_MAX - 50;
-	_delay_ms(100);
-	OCR1A = PWM_TOP;
-}
-
-int main(void)
-{
-	uint8_t rxaddr[ADDRLEN] = { 194, 178, 83 };
-	uint8_t txaddr[ADDRLEN] = { 194, 178, 82 };
-
-	char buf[WDLEN], key[WDLEN], msg[WDLEN];
-
-	init_wdt();
-	init_rx();
-	init_btns();
-	init_servo();
-
-	led_init();
-	radio_init(rxaddr);
-
-	sei();
-	radio_listen();
-
-	for (;;) {
-		if (rxd) {
-			radio_recv(buf, WDLEN);
-			rxd = 0;
-			xor(KEY, buf, msg, WDLEN);
-			if (memcmp(msg, SYN, WDLEN) == 0) {
-				keygen(key, WDLEN);
-				xor(KEY, key, buf, WDLEN);
-				radio_sendto(txaddr, buf, WDLEN);
-			} else {
-				xor(key, buf, msg, WDLEN);
-				if (memcmp(msg, LOCK, WDLEN) == 0) {
-					lock();
-					keydel(key, WDLEN);
-				} else if (memcmp(msg, UNLOCK, WDLEN) == 0) {
-					unlock();
-					keydel(key, WDLEN);
-				}
-			}
-		} else {
-			radio_pwr_dwn();
-			if (getvcc() < VCC_MIN)
-				led_bat();
-			sleep_bod_disable();
-			set_sleep_mode(SLEEP_MODE_PWR_DOWN);
-			sleep_mode();
-		}
-	}
-	return 0;
-}
-
-ISR(RX_INTVEC)
-{
-	if (!(RX_PIN & (1 << RX_IRQ_PIN)))
-		rxd = 1;
-}
-
-ISR(INT1_vect)
-{
-	if (is_btn_pressed(PIND, LOCK_PIN)) {
-		lock();
-		led_locked();
-	}
-}
-
-ISR(PCINT2_vect)
-{
-	if (is_btn_pressed(PIND, UNLOCK_PIN)) {
-		unlock();
-		led_unlocked();
-	}
-}
-
-- 
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