1 files changed, 77 insertions, 0 deletions
diff --git a/rf_test/send.c b/rf_test/send.c
new file mode 100644
index 0000000..017d67b
--- /dev/null
+++ b/rf_test/send.c
@@ -0,0 +1,77 @@
+#include <avr/io.h>
+#include <avr/interrupt.h>
+#include <util/delay.h>
+#include <util/setbaud.h>
+
+#define LOCK_BTN    PD6
+#define UNLOCK_BTN  PD7
+
+#define SYN        0xA4
+#define ADDR       0x01
+#define LOCK_CMD   0x02
+#define UNLOCK_CMD 0x03
+
+static void usart_init(void)
+{
+	UBRR0H = UBRRH_VALUE;
+	UBRR0L = UBRRL_VALUE;
+#if USE_2X
+	UCSR0A |= (1 << U2X0);
+#else
+	UCSR0A &= ~(1 << U2X0);
+#endif
+	UCSR0B = (1 << TXEN0) | (1 << RXEN0);
+	UCSR0C = (1 << UCSZ01) | (1 << UCSZ00);
+}
+
+static void usart_send(unsigned char data)
+{
+	while (!(UCSR0A & (1 << UDRE0)))
+		;
+	UDR0 = data;
+}
+
+int main(void)
+{
+	usart_init();
+
+	for (;;)
+		;
+
+	return 0;
+}
+
+static inline int is_btn_pressed(unsigned char btn)
+{
+	if (!((PIND >> btn) & 0x01)) {
+		_delay_us(2000);
+		return !((PIND >> btn) & 0x01);
+	}
+	
+	return 0;
+}
+
+static inline void lock(void)
+{
+	usart_send(SYN);
+	usart_send(ADDR);
+	usart_send(LOCK_CMD);
+	usart_send(LOCK_CMD + ADDR);
+}
+
+static inline void unlock(void)
+{
+	usart_send(SYN);
+	usart_send(ADDR);
+	usart_send(UNLOCK_CMD);
+	usart_send(UNLOCK_CMD + ADDR);
+}
+
+ISR(PCINT2_vect)
+{
+	if (is_btn_pressed(LOCK_BTN))
+		lock();
+
+	if (is_btn_pressed(UNLOCK_BTN))
+		unlock();
+}