Added tx/rx example for Rf24.

rf24/example/tx_rx_string.c

@@ -0,0 +1,90 @@
+#include <util/delay.h>
+#include <stdio.h>
+#include "ard/serial.h"
+#include "ard/pins.h"
+#include "ard/util.h"
+#include "rf24/rf24.h"
+#include "rf24/nRF24L01.h"
+
+//#define TX
+#define PAYLOAD 32 // byte
+
+unsigned char rx_addr[5] = {0xE7, 0xE7, 0xE7, 0xE7, 0xE7};
+unsigned char tx_addr[5] = {0xD7, 0xD7, 0xD7, 0xD7, 0xD7};
+
+void prepare();
+void loop();
+void tx();
+void rx();
+
+int main(){
+	prepare();
+
+	while(1){
+		loop();
+	}
+}
+
+void prepare(){
+	pins_init();
+	serial_init(9600);
+
+	pin_mode(A1, OUTPUT); // green
+	pin_mode(A2, OUTPUT); // red
+
+	rf24_init(7, 6, 5, 4, 3, 2);
+	rf24_config(2, PAYLOAD);
+
+#ifdef TX
+	rf24_rx_addr(rx_addr);
+	rf24_tx_addr(tx_addr);
+#else
+	rf24_rx_addr(tx_addr);
+	rf24_tx_addr(rx_addr);
+#endif
+
+	digital_write(A1, HIGH);
+	_delay_ms(300);
+	digital_write(A1, LOW);
+}
+
+void loop(){
+#ifdef TX
+	tx();
+#else
+	rx();
+#endif
+}
+
+void tx(){
+	_delay_ms(10);
+	digital_write(A1, LOW);
+	digital_write(A2, LOW);
+	unsigned char data[PAYLOAD] = "Hello, World! What's going on?";
+
+	rf24_send(data);
+	while(rf24_is_sending());
+	unsigned char status = rf24_status();
+
+	if(status&(1<<TX_DS)){
+		digital_write(A1, HIGH);
+	}
+	else{
+		digital_write(A2, HIGH);
+	}
+}
+
+void rx(){
+	digital_write(A1, LOW);
+	digital_write(A2, LOW);
+
+	if(rf24_data_ready()){
+		unsigned char data[PAYLOAD];
+
+		rf24_get_data(data);
+		digital_write(A1, HIGH);
+		serial_write((char*)data, PAYLOAD);
+
+		_delay_ms(100);
+	}
+}