Use INT0 and INT1 for wakeup.

1 files changed, 52 insertions, 4 deletions

diff --git a/lock/fend.c b/lock/fend.c
index 7d86ab1..41e907d 100644
--- a/lock/fend.c
+++ b/lock/fend.c
@@ -11,24 +11,72 @@
 #include "uart.h"
 #include "util.h"
 
+#define BTN_PIN            PINB
+#define BTN_PCIE           PCIE0
+#define BTN_PCINTVEC       PCINT0_vect
+#define LOCK_BTN           PB0
+#define LOCK_BTN_PCINT     PCINT0
+
+#define RX_PIN             PD7
+#define RX_DDR             DDRD
+#define RX_PORT            PORTD
+#define RX_PCIE            PCIE2
+#define RX_PCINT           PCINT23
+#define RX_PCMSK           PCMSK2
+#define RX_PCINTVEC        PCINT2_vect
+
+uint8_t syncing = 0;
+static volatile uint8_t rxdr = 0;
+static volatile uint8_t btn_press = 0;
+
 int main(void)
 {
-	uint8_t n;
+	uint8_t n, rc;
 	uint8_t rxaddr[ADDRLEN] = { 194, 178, 82 };
 	uint8_t txaddr[ADDRLEN] = { 194, 178, 83 };
 
-	char buf[WDLEN + 1], msg[WDLEN + 1];
+	char buf[WDLEN + 1], key[WDLEN + 1];
+
+	RX_DDR &= ~(1 << RX_PIN);
+	RX_PORT |= (1 << RX_PIN); 
+	PCICR |= (1 << RX_PCIE);
+	RX_PCMSK |= (1 << RX_PCINT);
 
 	uart_init();
+	btn_init();
 	radio_init(rxaddr);
 	radio_print_config();
 
 	sei();
 
 	for (;;) {
-		_delay_ms(2000);
-	}
+		if (rxdr) {
+			rxdr = 0;
+			if (syncing) {
+				n = radio_recv(buf, WDLEN);
+				buf[n] = '\0';
+				xor(KEY, buf, key, WDLEN);
+			}
+		}
 
+		if (btn_press) {
+			syncing = 1;
+			btn_press = 0;
+			xor(KEY, SYN, buf, WDLEN);
+			do {
+				rc = radio_sendto(txaddr, buf, WDLEN);
+			} while (!rc);
+		}
+	}
 	return 0;
 }
 
+ISR(RX_PCINTVEC)
+{
+	rxdr = 1;
+}
+
+ISR(BTN_PCINTVEC)
+{
+	btn_press = 1;
+}