From cb92166dcdf0a8198f4e01b4cd961876b00f075c Mon Sep 17 00:00:00 2001
From: Karl Palsson <github@tweak.net.au>
Date: Sun, 13 Mar 2011 19:28:44 +0000
Subject: [PATCH] Add an rx only example
---
examples/RX_only/RX_only.pde | 65 ++++++++++++++++++++++++++++++++++++
1 file changed, 65 insertions(+)
create mode 100644 examples/RX_only/RX_only.pde
diff --git a/examples/RX_only/RX_only.pde b/examples/RX_only/RX_only.pde
new file mode 100644
index 0000000..f3a8c7b
--- /dev/null
+++ b/examples/RX_only/RX_only.pde
@@ -0,0 +1,65 @@
+/**
+ * Example code for using a microchip mrf24j40 module in receive mode only
+ * 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);
+
+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);
+ interrupts();
+}
+
+volatile byte gotrx;
+
+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;
+ }
+}
+
+void loop() {
+ int tmp;
+ if (gotrx) {
+ gotrx = 0;
+ noInterrupts();
+ mrf.write_short(MRF_BBREG1, 0x04); // RXDECINV - disable receiver
+
+ 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.write_short(MRF_BBREG1, 0x00); // RXDECINV - enable receiver
+ interrupts();
+ }
+}