Initial basic version of my arduino mrf24j40 library
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/**
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* mrf24j.cpp, Karl Palsson, 2011, karlp@tweak.net.au
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* modifed bsd license / apache license
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*/
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#include "WProgram.h"
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#include "mrf24j.h"
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Mrf24j::Mrf24j(int pin_reset, int pin_chip_select, int pin_interrupt) {
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_pin_reset = pin_reset;
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_pin_cs = pin_chip_select;
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_pin_int = pin_interrupt;
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pinMode(_pin_reset, OUTPUT);
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pinMode(_pin_cs, OUTPUT);
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pinMode(_pin_int, INPUT);
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SPI.begin();
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// arguably should not be here...
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mrf_reset();
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mrf_init();
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}
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void Mrf24j::mrf_reset(void) {
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digitalWrite(_pin_reset, LOW);
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delay(10); // just my gut
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digitalWrite(_pin_reset, HIGH);
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delay(20); // from manual
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}
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byte Mrf24j::mrf_read_short(byte address) {
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digitalWrite(_pin_cs, LOW);
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// 0 top for short addressing, 0 bottom for read
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SPI.transfer(address<<1 & 0b01111110);
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byte ret = SPI.transfer(0x0);
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digitalWrite(_pin_cs, HIGH);
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return ret;
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}
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byte Mrf24j::mrf_read_long(word address) {
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digitalWrite(_pin_cs, LOW);
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byte ahigh = address >> 3;
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byte alow = address << 5;
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SPI.transfer(0x80 | ahigh); // high bit for long
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SPI.transfer(alow);
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byte ret = SPI.transfer(0);
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digitalWrite(_pin_cs, HIGH);
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return ret;
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}
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void Mrf24j::mrf_write_short(byte address, byte data) {
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digitalWrite(_pin_cs, LOW);
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// 0 for top address, 1 bottom for write
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SPI.transfer((address<<1 & 0b01111110) | 0x01);
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SPI.transfer(data);
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digitalWrite(_pin_cs, HIGH);
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}
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void Mrf24j::mrf_write_long(word address, byte data) {
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digitalWrite(_pin_cs, LOW);
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byte ahigh = address >> 3;
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byte alow = address << 5;
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SPI.transfer(0x80 | ahigh); // high bit for long
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SPI.transfer(alow | 0x10); // last bit for write
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SPI.transfer(data);
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digitalWrite(_pin_cs, HIGH);
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}
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word Mrf24j::mrf_pan_read(void) {
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byte panh = mrf_read_short(MRF_PANIDH);
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return panh << 8 | mrf_read_short(MRF_PANIDL);
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}
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void Mrf24j::mrf_pan_write(word panid) {
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mrf_write_short(MRF_PANIDH, panid >> 8);
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mrf_write_short(MRF_PANIDL, panid & 0xff);
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}
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void Mrf24j::mrf_address16_write(word address16) {
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mrf_write_short(MRF_SADRH, address16 >> 8);
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mrf_write_short(MRF_SADRL, address16 & 0xff);
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}
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word Mrf24j::mrf_address16_read(void) {
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byte a16h = mrf_read_short(MRF_SADRH);
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return a16h << 8 | mrf_read_short(MRF_SADRL);
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}
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/**
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* Simple send 16, with acks, not much of anything.. assumes src16 and local pan only.
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* @param data
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*/
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void Mrf24j::mrf_send16(word dest16, byte len, char * data) {
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int i = 0;
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mrf_write_long(i++, 9); // header length
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mrf_write_long(i++, 9+2+len); //+2 is because module seems to ignore 2 bytes after the header?!
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// 0 | pan compression | ack | no security | no data pending | data frame[3 bits]
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mrf_write_long(i++, 0b01100001); // first byte of Frame Control
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// 16 bit source, 802.15.4 (2003), 16 bit dest,
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mrf_write_long(i++, 0b10001000); // second byte of frame control
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mrf_write_long(i++, 1); // sequence number 1
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word panid = mrf_pan_read();
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mrf_write_long(i++, panid & 0xff); // dest panid
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mrf_write_long(i++, panid >> 8);
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mrf_write_long(i++, dest16 & 0xff); // dest16 low
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mrf_write_long(i++, dest16 >> 8); // dest16 high
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word src16 = mrf_address16_read();
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mrf_write_long(i++, src16 & 0xff); // src16 low
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mrf_write_long(i++, src16 >> 8); // src16 high
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i+=2; // All testing seems to indicate that the next two bytes are ignored.
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for (int q = 0; q < len; q++) {
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mrf_write_long(i++, data[q]);
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}
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// ack on, and go!
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mrf_write_short(MRF_TXNCON, (1<<MRF_TXNACKREQ | 1<<MRF_TXNTRIG));
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}
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void Mrf24j::mrf_set_interrupts(void) {
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// interrupts for rx and tx normal complete
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mrf_write_short(MRF_INTCON, 0b11110110);
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}
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// Set the channel to 12, 2.41Ghz, xbee channel 0xC
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void Mrf24j::mrf_set_channel(void) {
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mrf_write_long(MRF_RFCON0, 0x13);
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}
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void Mrf24j::mrf_init(void) {
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/*
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// Seems a bit ridiculous when I use reset pin anyway
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mrf_write_short(MRF_SOFTRST, 0x7); // from manual
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while (mrf_read_short(MRF_SOFTRST) & 0x7 != 0) {
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; // wait for soft reset to finish
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}
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*/
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mrf_write_short(MRF_PACON2, 0x98); // – Initialize FIFOEN = 1 and TXONTS = 0x6.
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mrf_write_short(MRF_TXSTBL, 0x95); // – Initialize RFSTBL = 0x9.
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mrf_write_long(MRF_RFCON0, 0x03); // – Initialize RFOPT = 0x03.
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mrf_write_long(MRF_RFCON1, 0x01); // – Initialize VCOOPT = 0x02.
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mrf_write_long(MRF_RFCON2, 0x80); // – Enable PLL (PLLEN = 1).
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mrf_write_long(MRF_RFCON6, 0x90); // – Initialize TXFIL = 1 and 20MRECVR = 1.
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mrf_write_long(MRF_RFCON7, 0x80); // – Initialize SLPCLKSEL = 0x2 (100 kHz Internal oscillator).
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mrf_write_long(MRF_RFCON8, 0x10); // – Initialize RFVCO = 1.
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mrf_write_long(MRF_SLPCON1, 0x21); // – Initialize CLKOUTEN = 1 and SLPCLKDIV = 0x01.
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// Configuration for nonbeacon-enabled devices (see Section 3.8 “Beacon-Enabled and
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// Nonbeacon-Enabled Networks”):
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mrf_write_short(MRF_BBREG2, 0x80); // Set CCA mode to ED
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mrf_write_short(MRF_CCAEDTH, 0x60); // – Set CCA ED threshold.
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mrf_write_short(MRF_BBREG6, 0x40); // – Set appended RSSI value to RXFIFO.
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mrf_set_interrupts();
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mrf_set_channel();
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// max power is by default.. just leave it...
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//Set transmitter power - See “REGISTER 2-62: RF CONTROL 3 REGISTER (ADDRESS: 0x203)”.
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mrf_write_short(MRF_RFCTL, 0x04); // – Reset RF state machine.
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mrf_write_short(MRF_RFCTL, 0x00); // part 2
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delay(1); // delay at least 192usec
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}
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/*
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* File: mrf24j.h
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* copyright Karl Palsson, karlp@tweak.net.au, 2011
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* modified BSD License / apache license
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*/
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#ifndef LIB_MRF24J_H
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#define LIB_MRF24J_H
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#include "WProgram.h"
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#include "SPI.h"
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#define MRF_RXMCR 0x00
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#define MRF_PANIDL 0x01
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#define MRF_PANIDH 0x02
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#define MRF_SADRL 0x03
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#define MRF_SADRH 0x04
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#define MRF_EADR0 0x05
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#define MRF_EADR1 0x06
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#define MRF_EADR2 0x07
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#define MRF_EADR3 0x08
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#define MRF_EADR4 0x09
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#define MRF_EADR5 0x0A
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#define MRF_EADR6 0x0B
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#define MRF_EADR7 0x0C
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#define MRF_RXFLUSH 0x0D
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//#define MRF_Reserved 0x0E
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//#define MRF_Reserved 0x0F
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#define MRF_ORDER 0x10
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#define MRF_TXMCR 0x11
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#define MRF_ACKTMOUT 0x12
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#define MRF_ESLOTG1 0x13
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#define MRF_SYMTICKL 0x14
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#define MRF_SYMTICKH 0x15
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#define MRF_PACON0 0x16
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#define MRF_PACON1 0x17
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#define MRF_PACON2 0x18
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//#define MRF_Reserved 0x19
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#define MRF_TXBCON0 0x1A
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// TXNCON: TRANSMIT NORMAL FIFO CONTROL REGISTER (ADDRESS: 0x1B)
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#define MRF_TXNCON 0x1B
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#define MRF_TXNTRIG 0
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#define MRF_TXNSECEN 1
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#define MRF_TXNACKREQ 2
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#define MRF_INDIRECT 3
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#define MRF_FPSTAT 4
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#define MRF_TXG1CON 0x1C
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#define MRF_TXG2CON 0x1D
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#define MRF_ESLOTG23 0x1E
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#define MRF_ESLOTG45 0x1F
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#define MRF_ESLOTG67 0x20
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#define MRF_TXPEND 0x21
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#define MRF_WAKECON 0x22
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#define MRF_FRMOFFSET 0x23
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// TXSTAT: TX MAC STATUS REGISTER (ADDRESS: 0x24)
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#define MRF_TXSTAT 0x24
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#define TXNRETRY1 7
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#define TXNRETRY0 6
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#define CCAFAIL 5
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#define TXG2FNT 4
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#define TXG1FNT 3
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#define TXG2STAT 2
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#define TXG1STAT 1
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#define TXNSTAT 0
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#define MRF_TXBCON1 0x25
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#define MRF_GATECLK 0x26
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#define MRF_TXTIME 0x27
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#define MRF_HSYMTMRL 0x28
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#define MRF_HSYMTMRH 0x29
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#define MRF_SOFTRST 0x2A
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//#define MRF_Reserved 0x2B
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#define MRF_SECCON0 0x2C
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#define MRF_SECCON1 0x2D
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#define MRF_TXSTBL 0x2E
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//#define MRF_Reserved 0x2F
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#define MRF_RXSR 0x30
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#define MRF_INTSTAT 0x31
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#define MRF_INTCON 0x32
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#define MRF_GPIO 0x33
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#define MRF_TRISGPIO 0x34
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#define MRF_SLPACK 0x35
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#define MRF_RFCTL 0x36
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#define MRF_SECCR2 0x37
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#define MRF_BBREG0 0x38
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#define MRF_BBREG1 0x39
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#define MRF_BBREG2 0x3A
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#define MRF_BBREG3 0x3B
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#define MRF_BBREG4 0x3C
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//#define MRF_Reserved 0x3D
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#define MRF_BBREG6 0x3E
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#define MRF_CCAEDTH 0x3F
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#define MRF_RFCON0 0x200
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#define MRF_RFCON1 0x201
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#define MRF_RFCON2 0x202
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#define MRF_RFCON3 0x203
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#define MRF_RFCON5 0x205
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#define MRF_RFCON6 0x206
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#define MRF_RFCON7 0x207
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#define MRF_RFCON8 0x208
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#define MRF_SLPCAL0 0x209
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#define MRF_SLPCAL1 0x20A
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#define MRF_SLPCAL2 0x20B
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#define MRF_RSSI 0x210
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#define MRF_SLPCON0 0x211
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#define MRF_SLPCON1 0x220
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#define MRF_WAKETIMEL 0x222
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#define MRF_WAKETIMEH 0x223
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#define MRF_REMCNTL 0x224
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#define MRF_REMCNTH 0x225
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#define MRF_MAINCNT0 0x226
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#define MRF_MAINCNT1 0x227
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#define MRF_MAINCNT2 0x228
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#define MRF_MAINCNT3 0x229
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#define MRF_TESTMODE 0x22F
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#define MRF_ASSOEADR1 0x231
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#define MRF_ASSOEADR2 0x232
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#define MRF_ASSOEADR3 0x233
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#define MRF_ASSOEADR4 0x234
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#define MRF_ASSOEADR5 0x235
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#define MRF_ASSOEADR6 0x236
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#define MRF_ASSOEADR7 0x237
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#define MRF_ASSOSADR0 0x238
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#define MRF_ASSOSADR1 0x239
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#define MRF_UPNONCE0 0x240
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#define MRF_UPNONCE1 0x241
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#define MRF_UPNONCE2 0x242
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#define MRF_UPNONCE3 0x243
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#define MRF_UPNONCE4 0x244
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#define MRF_UPNONCE5 0x245
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#define MRF_UPNONCE6 0x246
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#define MRF_UPNONCE7 0x247
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#define MRF_UPNONCE8 0x248
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#define MRF_UPNONCE9 0x249
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#define MRF_UPNONCE10 0x24A
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#define MRF_UPNONCE11 0x24B
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#define MRF_UPNONCE12 0x24C
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#define MRF_I_RXIF 0b00001000
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#define MRF_I_TXNIF 0b00000001
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class Mrf24j
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{
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public:
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Mrf24j(int pin_reset, int pin_chip_select, int pin_interrupt);
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void mrf_reset(void);
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void mrf_init(void);
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byte mrf_read_short(byte address);
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byte mrf_read_long(word address);
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void mrf_write_short(byte address, byte data);
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void mrf_write_long(word address, byte data);
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word mrf_pan_read(void);
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void mrf_pan_write(word panid);
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void mrf_address16_write(word address16);
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word mrf_address16_read(void);
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void mrf_set_interrupts(void);
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// Set the channel to 12, 2.41Ghz, xbee channel 0xC
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void mrf_set_channel(void);
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void mrf_send16(word dest16, byte len, char * data);
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private:
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int _pin_reset;
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int _pin_cs;
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int _pin_int;
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};
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#endif /* LIB_MRF24J_H */
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