95 lines
2.5 KiB
Plaintext
95 lines
2.5 KiB
Plaintext
/**
|
|
* 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;
|
|
const int pin_cs = 7;
|
|
const int pin_interrupt = 5;
|
|
|
|
Mrf24j mrf(pin_reset, pin_cs, pin_interrupt);
|
|
|
|
long last_time;
|
|
long tx_interval = 1000;
|
|
|
|
void setup() {
|
|
Serial.begin(9600);
|
|
|
|
mrf.set_pan(0xcafe);
|
|
// This is _our_ address
|
|
mrf.address16_write(0x6001);
|
|
|
|
// uncomment if you want to receive any packet on this channel
|
|
// mrf.set_promiscuous(true);
|
|
|
|
attachInterrupt(0, interrupt_routine, CHANGE);
|
|
last_time = millis();
|
|
}
|
|
|
|
volatile uint8_t gotrx;
|
|
volatile uint8_t txok;
|
|
|
|
void interrupt_routine() {
|
|
// read and clear from the radio
|
|
byte last_interrupt = mrf.read_short(MRF_INTSTAT);
|
|
if (last_interrupt & MRF_I_RXIF) {
|
|
gotrx = 1;
|
|
}
|
|
if (last_interrupt & MRF_I_TXNIF) {
|
|
txok = 1;
|
|
}
|
|
}
|
|
|
|
void loop() {
|
|
int tmp;
|
|
interrupts();
|
|
unsigned long current_time = millis();
|
|
if (current_time - last_time > tx_interval) {
|
|
last_time = current_time;
|
|
Serial.println("txxxing...");
|
|
mrf.send16(0x4202, 4, "abcd");
|
|
}
|
|
if (txok) {
|
|
txok = 0;
|
|
Serial.print("tx went ok:");
|
|
tmp = mrf.read_short(MRF_TXSTAT);
|
|
Serial.print(tmp);
|
|
if (!(tmp & ~(1<<TXNSTAT))) { // 1 = failed
|
|
Serial.print("...And we got an ACK");
|
|
} else {
|
|
Serial.print("retried ");
|
|
Serial.print(tmp >> 6, HEX);
|
|
}
|
|
Serial.println();
|
|
}
|
|
if (gotrx) {
|
|
gotrx = 0;
|
|
noInterrupts();
|
|
mrf.rx_disable();
|
|
|
|
byte frame_length = mrf.read_long(0x300); // read start of rxfifo
|
|
Serial.print("received a packet ");Serial.print(frame_length, DEC);Serial.println(" bytes long");
|
|
Serial.println("Packet data:");
|
|
for (int i = 1; i <= frame_length; i++) {
|
|
tmp = mrf.read_long(0x300 + i);
|
|
Serial.print(tmp, HEX);
|
|
}
|
|
Serial.print("\r\nLQI/RSSI=");
|
|
byte lqi = mrf.read_long(0x300 + frame_length + 1);
|
|
byte rssi = mrf.read_long(0x300 + frame_length + 2);
|
|
Serial.print(lqi, HEX);
|
|
Serial.println(rssi, HEX);
|
|
|
|
mrf.rx_enable();
|
|
interrupts();
|
|
|
|
}
|
|
|
|
}
|