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Initial basic version of my arduino mrf24j40 library

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Karl Palsson 2011-03-13 17:33:58 +00:00
commit 19edd271b9
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/**
* mrf24j.cpp, Karl Palsson, 2011, karlp@tweak.net.au
* modifed bsd license / apache license
*/
#include "WProgram.h"
#include "mrf24j.h"
Mrf24j::Mrf24j(int pin_reset, int pin_chip_select, int pin_interrupt) {
_pin_reset = pin_reset;
_pin_cs = pin_chip_select;
_pin_int = pin_interrupt;
pinMode(_pin_reset, OUTPUT);
pinMode(_pin_cs, OUTPUT);
pinMode(_pin_int, INPUT);
SPI.begin();
// arguably should not be here...
mrf_reset();
mrf_init();
}
void Mrf24j::mrf_reset(void) {
digitalWrite(_pin_reset, LOW);
delay(10); // just my gut
digitalWrite(_pin_reset, HIGH);
delay(20); // from manual
}
byte Mrf24j::mrf_read_short(byte address) {
digitalWrite(_pin_cs, LOW);
// 0 top for short addressing, 0 bottom for read
SPI.transfer(address<<1 & 0b01111110);
byte ret = SPI.transfer(0x0);
digitalWrite(_pin_cs, HIGH);
return ret;
}
byte Mrf24j::mrf_read_long(word address) {
digitalWrite(_pin_cs, LOW);
byte ahigh = address >> 3;
byte alow = address << 5;
SPI.transfer(0x80 | ahigh); // high bit for long
SPI.transfer(alow);
byte ret = SPI.transfer(0);
digitalWrite(_pin_cs, HIGH);
return ret;
}
void Mrf24j::mrf_write_short(byte address, byte data) {
digitalWrite(_pin_cs, LOW);
// 0 for top address, 1 bottom for write
SPI.transfer((address<<1 & 0b01111110) | 0x01);
SPI.transfer(data);
digitalWrite(_pin_cs, HIGH);
}
void Mrf24j::mrf_write_long(word address, byte data) {
digitalWrite(_pin_cs, LOW);
byte ahigh = address >> 3;
byte alow = address << 5;
SPI.transfer(0x80 | ahigh); // high bit for long
SPI.transfer(alow | 0x10); // last bit for write
SPI.transfer(data);
digitalWrite(_pin_cs, HIGH);
}
word Mrf24j::mrf_pan_read(void) {
byte panh = mrf_read_short(MRF_PANIDH);
return panh << 8 | mrf_read_short(MRF_PANIDL);
}
void Mrf24j::mrf_pan_write(word panid) {
mrf_write_short(MRF_PANIDH, panid >> 8);
mrf_write_short(MRF_PANIDL, panid & 0xff);
}
void Mrf24j::mrf_address16_write(word address16) {
mrf_write_short(MRF_SADRH, address16 >> 8);
mrf_write_short(MRF_SADRL, address16 & 0xff);
}
word Mrf24j::mrf_address16_read(void) {
byte a16h = mrf_read_short(MRF_SADRH);
return a16h << 8 | mrf_read_short(MRF_SADRL);
}
/**
* Simple send 16, with acks, not much of anything.. assumes src16 and local pan only.
* @param data
*/
void Mrf24j::mrf_send16(word dest16, byte len, char * data) {
int i = 0;
mrf_write_long(i++, 9); // header length
mrf_write_long(i++, 9+2+len); //+2 is because module seems to ignore 2 bytes after the header?!
// 0 | pan compression | ack | no security | no data pending | data frame[3 bits]
mrf_write_long(i++, 0b01100001); // first byte of Frame Control
// 16 bit source, 802.15.4 (2003), 16 bit dest,
mrf_write_long(i++, 0b10001000); // second byte of frame control
mrf_write_long(i++, 1); // sequence number 1
word panid = mrf_pan_read();
mrf_write_long(i++, panid & 0xff); // dest panid
mrf_write_long(i++, panid >> 8);
mrf_write_long(i++, dest16 & 0xff); // dest16 low
mrf_write_long(i++, dest16 >> 8); // dest16 high
word src16 = mrf_address16_read();
mrf_write_long(i++, src16 & 0xff); // src16 low
mrf_write_long(i++, src16 >> 8); // src16 high
i+=2; // All testing seems to indicate that the next two bytes are ignored.
for (int q = 0; q < len; q++) {
mrf_write_long(i++, data[q]);
}
// ack on, and go!
mrf_write_short(MRF_TXNCON, (1<<MRF_TXNACKREQ | 1<<MRF_TXNTRIG));
}
void Mrf24j::mrf_set_interrupts(void) {
// interrupts for rx and tx normal complete
mrf_write_short(MRF_INTCON, 0b11110110);
}
// Set the channel to 12, 2.41Ghz, xbee channel 0xC
void Mrf24j::mrf_set_channel(void) {
mrf_write_long(MRF_RFCON0, 0x13);
}
void Mrf24j::mrf_init(void) {
/*
// Seems a bit ridiculous when I use reset pin anyway
mrf_write_short(MRF_SOFTRST, 0x7); // from manual
while (mrf_read_short(MRF_SOFTRST) & 0x7 != 0) {
; // wait for soft reset to finish
}
*/
mrf_write_short(MRF_PACON2, 0x98); // – Initialize FIFOEN = 1 and TXONTS = 0x6.
mrf_write_short(MRF_TXSTBL, 0x95); // – Initialize RFSTBL = 0x9.
mrf_write_long(MRF_RFCON0, 0x03); // – Initialize RFOPT = 0x03.
mrf_write_long(MRF_RFCON1, 0x01); // – Initialize VCOOPT = 0x02.
mrf_write_long(MRF_RFCON2, 0x80); // – Enable PLL (PLLEN = 1).
mrf_write_long(MRF_RFCON6, 0x90); // – Initialize TXFIL = 1 and 20MRECVR = 1.
mrf_write_long(MRF_RFCON7, 0x80); // – Initialize SLPCLKSEL = 0x2 (100 kHz Internal oscillator).
mrf_write_long(MRF_RFCON8, 0x10); // – Initialize RFVCO = 1.
mrf_write_long(MRF_SLPCON1, 0x21); // – Initialize CLKOUTEN = 1 and SLPCLKDIV = 0x01.
// Configuration for nonbeacon-enabled devices (see Section 3.8 “Beacon-Enabled and
// Nonbeacon-Enabled Networks”):
mrf_write_short(MRF_BBREG2, 0x80); // Set CCA mode to ED
mrf_write_short(MRF_CCAEDTH, 0x60); // – Set CCA ED threshold.
mrf_write_short(MRF_BBREG6, 0x40); // – Set appended RSSI value to RXFIFO.
mrf_set_interrupts();
mrf_set_channel();
// max power is by default.. just leave it...
//Set transmitter power - See “REGISTER 2-62: RF CONTROL 3 REGISTER (ADDRESS: 0x203)”.
mrf_write_short(MRF_RFCTL, 0x04); // – Reset RF state machine.
mrf_write_short(MRF_RFCTL, 0x00); // part 2
delay(1); // delay at least 192usec
}

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/*
* File: mrf24j.h
* copyright Karl Palsson, karlp@tweak.net.au, 2011
* modified BSD License / apache license
*/
#ifndef LIB_MRF24J_H
#define LIB_MRF24J_H
#include "WProgram.h"
#include "SPI.h"
#define MRF_RXMCR 0x00
#define MRF_PANIDL 0x01
#define MRF_PANIDH 0x02
#define MRF_SADRL 0x03
#define MRF_SADRH 0x04
#define MRF_EADR0 0x05
#define MRF_EADR1 0x06
#define MRF_EADR2 0x07
#define MRF_EADR3 0x08
#define MRF_EADR4 0x09
#define MRF_EADR5 0x0A
#define MRF_EADR6 0x0B
#define MRF_EADR7 0x0C
#define MRF_RXFLUSH 0x0D
//#define MRF_Reserved 0x0E
//#define MRF_Reserved 0x0F
#define MRF_ORDER 0x10
#define MRF_TXMCR 0x11
#define MRF_ACKTMOUT 0x12
#define MRF_ESLOTG1 0x13
#define MRF_SYMTICKL 0x14
#define MRF_SYMTICKH 0x15
#define MRF_PACON0 0x16
#define MRF_PACON1 0x17
#define MRF_PACON2 0x18
//#define MRF_Reserved 0x19
#define MRF_TXBCON0 0x1A
// TXNCON: TRANSMIT NORMAL FIFO CONTROL REGISTER (ADDRESS: 0x1B)
#define MRF_TXNCON 0x1B
#define MRF_TXNTRIG 0
#define MRF_TXNSECEN 1
#define MRF_TXNACKREQ 2
#define MRF_INDIRECT 3
#define MRF_FPSTAT 4
#define MRF_TXG1CON 0x1C
#define MRF_TXG2CON 0x1D
#define MRF_ESLOTG23 0x1E
#define MRF_ESLOTG45 0x1F
#define MRF_ESLOTG67 0x20
#define MRF_TXPEND 0x21
#define MRF_WAKECON 0x22
#define MRF_FRMOFFSET 0x23
// TXSTAT: TX MAC STATUS REGISTER (ADDRESS: 0x24)
#define MRF_TXSTAT 0x24
#define TXNRETRY1 7
#define TXNRETRY0 6
#define CCAFAIL 5
#define TXG2FNT 4
#define TXG1FNT 3
#define TXG2STAT 2
#define TXG1STAT 1
#define TXNSTAT 0
#define MRF_TXBCON1 0x25
#define MRF_GATECLK 0x26
#define MRF_TXTIME 0x27
#define MRF_HSYMTMRL 0x28
#define MRF_HSYMTMRH 0x29
#define MRF_SOFTRST 0x2A
//#define MRF_Reserved 0x2B
#define MRF_SECCON0 0x2C
#define MRF_SECCON1 0x2D
#define MRF_TXSTBL 0x2E
//#define MRF_Reserved 0x2F
#define MRF_RXSR 0x30
#define MRF_INTSTAT 0x31
#define MRF_INTCON 0x32
#define MRF_GPIO 0x33
#define MRF_TRISGPIO 0x34
#define MRF_SLPACK 0x35
#define MRF_RFCTL 0x36
#define MRF_SECCR2 0x37
#define MRF_BBREG0 0x38
#define MRF_BBREG1 0x39
#define MRF_BBREG2 0x3A
#define MRF_BBREG3 0x3B
#define MRF_BBREG4 0x3C
//#define MRF_Reserved 0x3D
#define MRF_BBREG6 0x3E
#define MRF_CCAEDTH 0x3F
#define MRF_RFCON0 0x200
#define MRF_RFCON1 0x201
#define MRF_RFCON2 0x202
#define MRF_RFCON3 0x203
#define MRF_RFCON5 0x205
#define MRF_RFCON6 0x206
#define MRF_RFCON7 0x207
#define MRF_RFCON8 0x208
#define MRF_SLPCAL0 0x209
#define MRF_SLPCAL1 0x20A
#define MRF_SLPCAL2 0x20B
#define MRF_RSSI 0x210
#define MRF_SLPCON0 0x211
#define MRF_SLPCON1 0x220
#define MRF_WAKETIMEL 0x222
#define MRF_WAKETIMEH 0x223
#define MRF_REMCNTL 0x224
#define MRF_REMCNTH 0x225
#define MRF_MAINCNT0 0x226
#define MRF_MAINCNT1 0x227
#define MRF_MAINCNT2 0x228
#define MRF_MAINCNT3 0x229
#define MRF_TESTMODE 0x22F
#define MRF_ASSOEADR1 0x231
#define MRF_ASSOEADR2 0x232
#define MRF_ASSOEADR3 0x233
#define MRF_ASSOEADR4 0x234
#define MRF_ASSOEADR5 0x235
#define MRF_ASSOEADR6 0x236
#define MRF_ASSOEADR7 0x237
#define MRF_ASSOSADR0 0x238
#define MRF_ASSOSADR1 0x239
#define MRF_UPNONCE0 0x240
#define MRF_UPNONCE1 0x241
#define MRF_UPNONCE2 0x242
#define MRF_UPNONCE3 0x243
#define MRF_UPNONCE4 0x244
#define MRF_UPNONCE5 0x245
#define MRF_UPNONCE6 0x246
#define MRF_UPNONCE7 0x247
#define MRF_UPNONCE8 0x248
#define MRF_UPNONCE9 0x249
#define MRF_UPNONCE10 0x24A
#define MRF_UPNONCE11 0x24B
#define MRF_UPNONCE12 0x24C
#define MRF_I_RXIF 0b00001000
#define MRF_I_TXNIF 0b00000001
class Mrf24j
{
public:
Mrf24j(int pin_reset, int pin_chip_select, int pin_interrupt);
void mrf_reset(void);
void mrf_init(void);
byte mrf_read_short(byte address);
byte mrf_read_long(word address);
void mrf_write_short(byte address, byte data);
void mrf_write_long(word address, byte data);
word mrf_pan_read(void);
void mrf_pan_write(word panid);
void mrf_address16_write(word address16);
word mrf_address16_read(void);
void mrf_set_interrupts(void);
// Set the channel to 12, 2.41Ghz, xbee channel 0xC
void mrf_set_channel(void);
void mrf_send16(word dest16, byte len, char * data);
private:
int _pin_reset;
int _pin_cs;
int _pin_int;
};
#endif /* LIB_MRF24J_H */