Add an example to the library

This commit is contained in:
Karl Palsson 2011-03-13 17:54:25 +00:00
parent 19edd271b9
commit 6c1aac9d08
1 changed files with 92 additions and 0 deletions

View File

@ -0,0 +1,92 @@
/**
* 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);
Serial.println("Starting to reset and startup...");
mrf.mrf_pan_write(0xcafe);
mrf.mrf_address16_write(0x6001);
attachInterrupt(0, interrupt_routine, CHANGE);
last_time = millis();
}
volatile uint8_t gotrx;
volatile uint8_t txok;
volatile uint8_t last_interrupt;
void interrupt_routine() {
// read and clear from the radio
last_interrupt = mrf.mrf_read_short(MRF_INTSTAT);
if (last_interrupt & MRF_I_RXIF) {
gotrx = 1;
}
if (last_interrupt & MRF_I_TXNIF) {
txok = 1;
}
}
void loop() {
//mrf.mrf_write_short(MRF_RXMCR, 0x01); // promiscuous!
int tmp;
interrupts();
unsigned long current_time = millis();
if (current_time - last_time > tx_interval) {
last_time = current_time;
Serial.println("txxxing...");
mrf.mrf_send16(0x4202, 4, "abcd");
}
if (txok) {
txok = 0;
Serial.print("tx went ok:");
tmp = mrf.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.mrf_write_short(MRF_BBREG1, 0x04); // RXDECINV - disable receiver
byte frame_length = mrf.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.mrf_read_long(0x300 + i);
Serial.print(tmp, HEX);
}
Serial.print("\r\nLQI/RSSI=");
byte lqi = mrf.mrf_read_long(0x300 + frame_length + 1);
byte rssi = mrf.mrf_read_long(0x300 + frame_length + 2);
Serial.print(lqi, HEX);
Serial.println(rssi, HEX);
mrf.mrf_write_short(MRF_BBREG1, 0x00); // RXDECINV - enable receiver
interrupts();
}
}