mrf24j40/examples/Basic_TwoWay/Basic_TwoWay.pde

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/**
* Example code for using a microchip mrf24j40 module to send and receive
* packets using plain 802.15.4
* Requirements: 3 pins for spi, 3 pins for reset, chip select and interrupt
* notifications
* This example file is considered to be in the public domain
* Originally written by Karl Palsson, karlp@tweak.net.au, March 2011
*/
#include <SPI.h>
#include <mrf24j.h>
const int pin_reset = 6;
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const int pin_cs = 10; // default CS pin on ATmega8/168/328
const int pin_interrupt = 2; // default interrupt pin on ATmega8/168/328
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Mrf24j mrf(pin_reset, pin_cs, pin_interrupt);
long last_time;
long tx_interval = 1000;
void setup() {
Serial.begin(9600);
mrf.reset();
mrf.init();
mrf.set_pan(0xcafe);
// This is _our_ address
mrf.address16_write(0x6001);
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// uncomment if you want to receive any packet on this channel
//mrf.set_promiscuous(true);
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// uncomment if you want to enable PA/LNA external control
//mrf.set_palna(true);
// uncomment if you want to buffer all PHY Payload
//mrf.set_bufferPHY(true);
attachInterrupt(0, interrupt_routine, CHANGE); // interrupt 0 equivalent to pin 2(INT0) on ATmega8/168/328
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last_time = millis();
interrupts();
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}
void interrupt_routine() {
mrf.interrupt_handler(); // mrf24 object interrupt routine
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}
void loop() {
mrf.check_flags(&handle_rx, &handle_tx);
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unsigned long current_time = millis();
if (current_time - last_time > tx_interval) {
last_time = current_time;
Serial.println("txxxing...");
mrf.send16(0x4202, "abcd");
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}
}
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void handle_rx() {
Serial.print("received a packet ");Serial.print(mrf.get_rxinfo()->frame_length, DEC);Serial.println(" bytes long");
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if(mrf.get_bufferPHY()){
Serial.println("Packet data (PHY Payload):");
for (int i = 0; i < mrf.get_rxinfo()->frame_length; i++) {
Serial.print(mrf.get_rxbuf()[i]);
}
}
Serial.println("\r\nASCII data (relevant data):");
for (int i = 0; i < mrf.rx_datalength(); i++) {
Serial.write(mrf.get_rxinfo()->rx_data[i]);
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}
Serial.print("\r\nLQI/RSSI=");
Serial.print(mrf.get_rxinfo()->lqi, DEC);
Serial.print("/");
Serial.println(mrf.get_rxinfo()->rssi, DEC);
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}
void handle_tx() {
if (mrf.get_txinfo()->tx_ok) {
Serial.println("TX went ok, got ack");
} else {
Serial.print("TX failed after ");Serial.print(mrf.get_txinfo()->retries);Serial.println(" retries\n");
}
}