forked from pa-pa/AskSinPP
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Radio.cpp
353 lines (301 loc) · 12.1 KB
/
Radio.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
//- -----------------------------------------------------------------------------------------------------------------------
// AskSin driver implementation
// 2013-08-03 <[email protected]> Creative Commons - https://creativecommons.org/licenses/by-nc-sa/3.0/de/
//- -----------------------------------------------------------------------------------------------------------------------
//- AskSin cc1101 functions -----------------------------------------------------------------------------------------------
//- with a lot of copy and paste from culfw firmware
//- -----------------------------------------------------------------------------------------------------------------------
//- -----------------------------------------------------------------------------------------------------------------------
// AskSin++
// 2016-10-31 papa Creative Commons - https://creativecommons.org/licenses/by-nc-sa/3.0/de/
//- -----------------------------------------------------------------------------------------------------------------------
#if defined(ARDUINO) && ARDUINO >= 100
#include "Arduino.h"
#else
#include "WProgram.h"
#endif
#include "Debug.h"
#include "Radio.h"
namespace as {
// this is the global radio object
CC1101 radio;
// private: //---------------------------------------------------------------------------------------------------------
CC1101::CC1101() : crc_ok(0), rss(0), lqi(0), intread(0), sending(false) {}
void CC1101::init(void) { // initialize CC1101
DPRINT(F("CC init"));
ccInitHw(); // init the hardware to get access to the RF modul
DPRINT(F("1"));
ccDeselect(); // some deselect and selects to init the TRX868modul
_delay_us(5);
ccSelect();
_delay_us(10);
ccDeselect();
_delay_us(41);
strobe(CC1101_SRES); // send reset
_delay_ms(10);
// define init settings for TRX868
static const uint8_t initVal[] PROGMEM = {
CC1101_IOCFG2, 0x2E, // // non inverted GDO2, high impedance tri state
// CC1101_IOCFG1, 0x2E, // (default) // low output drive strength, non inverted GD=1, high impedance tri state
CC1101_IOCFG0, 0x06, // packet CRC ok // disable temperature sensor, non inverted GDO0,
CC1101_FIFOTHR, 0x0D, // 0 ADC retention, 0 close in RX, TX FIFO = 9 / RX FIFO = 56 byte
CC1101_SYNC1, 0xE9, // Sync word
CC1101_SYNC0, 0xCA,
CC1101_PKTLEN, 0x3D, // packet length 61
CC1101_PKTCTRL1, 0x0C, // PQT = 0, CRC auto flush = 1, append status = 1, no address check
CC1101_FSCTRL1, 0x06, // frequency synthesizer control
// 868.299866 MHz
//CC1101_FREQ2, 0x21,
//CC1101_FREQ1, 0x65,
//CC1101_FREQ0, 0x6A,
// 868.2895508
CC1101_FREQ2, 0x21,
CC1101_FREQ1, 0x65,
CC1101_FREQ0, 0x50,
CC1101_MDMCFG4, 0xC8,
CC1101_MDMCFG3, 0x93,
CC1101_MDMCFG2, 0x03,
CC1101_DEVIATN, 0x34, // 19.042969 kHz
CC1101_MCSM2, 0x01,
// CC1101_MCSM1, 0x30, // (default) // always go into IDLE
CC1101_MCSM0, 0x18,
CC1101_FOCCFG, 0x16,
CC1101_AGCCTRL2, 0x43,
//CC1101_WOREVT1, 0x28, // tEVENT0 = 50 ms, RX timeout = 390 us
//7CC1101_WOREVT0, 0xA0,
//CC1101_WORCTRL, 0xFB, //EVENT1 = 3, WOR_RES = 0
CC1101_FREND1, 0x56,
CC1101_FSCAL1, 0x00,
CC1101_FSCAL0, 0x11,
CC1101_TEST1, 0x35,
CC1101_PATABLE, 0xC3,
};
for (uint8_t i=0; i<sizeof(initVal); i+=2) { // write init value to TRX868
writeReg(pgm_read_byte(&initVal[i]), pgm_read_byte(&initVal[i+1]));
}
DPRINT(F("2"));
strobe(CC1101_SCAL); // calibrate frequency synthesizer and turn it off
while (readReg(CC1101_MARCSTATE, CC1101_STATUS) != 1) { // waits until module gets ready
_delay_us(1);
DPRINT(F("."));
}
DPRINT(F("3"));
writeReg(CC1101_PATABLE, PA_MaxPower); // configure PATABLE
strobe(CC1101_SRX); // flush the RX buffer
strobe(CC1101_SWORRST); // reset real time clock
DPRINTLN(F(" - ready"));
}
uint8_t CC1101::sndData(uint8_t *buf, uint8_t size, uint8_t burst) { // send data packet via RF
sending = true;
// Going from RX to TX does not work if there was a reception less than 0.5
// sec ago. Due to CCA? Using IDLE helps to shorten this period(?)
strobe(CC1101_SIDLE); // go to idle mode
strobe(CC1101_SFRX ); // flush RX buffer
strobe(CC1101_SFTX ); // flush TX buffer
//dbg << "tx\n";
if (burst) { // BURST-bit set?
strobe(CC1101_STX ); // send a burst
_delay_ms(360); // according to ELV, devices get activated every 300ms, so send burst for 360ms
//dbg << "send burst\n";
} else {
_delay_ms(1); // wait a short time to set TX mode
}
writeReg(CC1101_TXFIFO, size);
writeBurst(CC1101_TXFIFO, buf, size); // write in TX FIFO
strobe(CC1101_SFRX); // flush the RX buffer
strobe(CC1101_STX); // send a burst
for(uint8_t i = 0; i < 200; i++) { // after sending out all bytes the chip should go automatically in RX mode
if( readReg(CC1101_MARCSTATE, CC1101_STATUS) == MARCSTATE_RX)
break; //now in RX mode, good
if( readReg(CC1101_MARCSTATE, CC1101_STATUS) != MARCSTATE_TX) {
break; //neither in RX nor TX, probably some error
}
_delay_us(10);
}
sending = false;
return true;
}
uint8_t CC1101::rcvData(uint8_t *buf,uint8_t size) { // read data packet from RX FIFO
uint8_t rxBytes = readReg(CC1101_RXBYTES, CC1101_STATUS); // how many bytes are in the buffer
//dbg << rxBytes << ' ';
if ((rxBytes & 0x7F) && !(rxBytes & 0x80)) { // any byte waiting to be read and no overflow?
rxBytes = readReg(CC1101_RXFIFO, CC1101_CONFIG); // read data length
if (rxBytes > size) { // if packet is too long
rxBytes = 0; // discard packet
}
else {
readBurst(buf, CC1101_RXFIFO, rxBytes); // read data packet
rss = readReg(CC1101_RXFIFO, CC1101_CONFIG); // read RSSI
if (rss >= 128) rss = 255 - rss;
rss /= 2; rss += 72;
uint8_t val = readReg(CC1101_RXFIFO, CC1101_CONFIG); // read LQI and CRC_OK
lqi = val & 0x7F;
crc_ok = bitRead(val, 7);
if( crc_ok == 0 ) {
rxBytes = 0;
}
}
}
else {
rxBytes = 0; // nothing to do, or overflow
}
strobe(CC1101_SFRX); // flush Rx FIFO
strobe(CC1101_SIDLE); // enter IDLE state
strobe(CC1101_SRX); // back to RX state
strobe(CC1101_SWORRST); // reset real time clock
// trx868.rfState = RFSTATE_RX; // declare to be in Rx state
// DPRINT("-> ");
// DHEX(buf,buf[0]);
return rxBytes; // return number of byte in buffer
}
void CC1101::setIdle() { // put CC1101 into power-down state
strobe(CC1101_SIDLE); // coming from RX state, we need to enter the IDLE state first
//strobe(CC1101_SFRX);
strobe(CC1101_SPWD); // enter power down state
//dbg << "pd\n";
}
void CC1101::wakeup () {
ccSelect(); // wake up the communication module
waitMiso();
ccDeselect();
}
uint8_t CC1101::detectBurst(void) {
// 10 7/10 5 in front of the received string; 33 after received string
// 10 - 00001010 - sync word found
// 7 - 00000111 - GDO0 = 1, GDO2 = 1
// 5 - 00000101 - GDO0 = 1, GDO2 = 1
// 33 - 00100001 - GDO0 = 1, preamble quality reached
// 96 - 01100000 - burst sent
// 48 - 00110000 - in receive mode
//
// Status byte table:
// 0 current GDO0 value
// 1 reserved
// 2 GDO2
// 3 sync word found
// 4 channel is clear
// 5 preamble quality reached
// 6 carrier sense
// 7 CRC ok
//
// possible solution for finding a burst is to check for bit 6, carrier sense
// power on cc1101 module and set to RX mode
ccSelect(); // wake up the communication module
waitMiso();
ccDeselect();
for(uint8_t i = 0; i < 200; i++) { // instead of delay, check the really needed time to wakeup
if (readReg(CC1101_MARCSTATE, CC1101_STATUS) != 0xff) break;
_delay_us(10);
}
strobe(CC1101_SRX); // set RX mode again
uint8_t bTmp;
for (uint8_t i = 0; i < 200; i++) { // check if we are in RX mode
bTmp = readReg(CC1101_PKTSTATUS, CC1101_STATUS); // read the status of the line
if ((bTmp & 0x10) || (bTmp & 0x40)) break; // check for channel clear, or carrier sense
_delay_us(10); // wait a bit
}
return (bTmp & 0x40)?1:0; // return carrier sense bit
}
void CC1101::strobe(uint8_t cmd) { // send command strobe to the CC1101 IC via SPI
ccSelect(); // select CC1101
waitMiso(); // wait until MISO goes low
ccSendByte(cmd); // send strobe command
ccDeselect(); // deselect CC1101
}
void CC1101::readBurst(uint8_t *buf, uint8_t regAddr, uint8_t len) { // read burst data from CC1101 via SPI
ccSelect(); // select CC1101
waitMiso(); // wait until MISO goes low
ccSendByte(regAddr | READ_BURST); // send register address
for(uint8_t i=0 ; i<len ; i++) {
buf[i] = ccSendByte(0x00); // read result byte by byte
//dbg << i << ":" << buf[i] << '\n';
}
ccDeselect(); // deselect CC1101
}
void CC1101::writeBurst(uint8_t regAddr, uint8_t *buf, uint8_t len) { // write multiple registers into the CC1101 IC via SPI
ccSelect(); // select CC1101
waitMiso(); // wait until MISO goes low
ccSendByte(regAddr | WRITE_BURST); // send register address
for(uint8_t i=0 ; i<len ; i++) ccSendByte(buf[i]); // send value
ccDeselect(); // deselect CC1101
}
uint8_t CC1101::readReg(uint8_t regAddr, uint8_t regType) { // read CC1101 register via SPI
ccSelect(); // select CC1101
waitMiso(); // wait until MISO goes low
ccSendByte(regAddr | regType); // send register address
uint8_t val = ccSendByte(0x00); // read result
ccDeselect(); // deselect CC1101
return val;
}
void CC1101::writeReg(uint8_t regAddr, uint8_t val) { // write single register into the CC1101 IC via SPI
ccSelect(); // select CC1101
waitMiso(); // wait until MISO goes low
ccSendByte(regAddr); // send register address
ccSendByte(val); // send value
ccDeselect(); // deselect CC1101
}
void CC1101::handleGDO0Int() {
if( sending == false ) {
// DPRINTLN("*");
intread = 1;
}
}
uint8_t CC1101::read (Message& msg) {
if( intread == 0 )
return 0;
intread = 0;
uint8_t len = rcvData(buffer.buffer(),buffer.buffersize());
if( len > 0 ) {
buffer.length(len);
// decode the message
buffer.decode();
// copy buffer to message
memcpy(msg.buffer(),buffer.buffer(),len);
}
msg.length(len);
// reset buffer
buffer.clear();
return msg.length();
}
bool CC1101::readAck (const Message& msg) {
if( intread == 0 )
return 0;
intread = 0;
bool ack=false;
uint8_t len = rcvData(buffer.buffer(),buffer.buffersize());
if( len > 0 ) {
buffer.length(len);
// decode the message
buffer.decode();
ack = buffer.isAck() &&
(buffer.from() == msg.to()) &&
(buffer.to() == msg.from()) &&
(buffer.count() == msg.count());
// reset buffer
buffer.clear();
}
return ack;
}
uint8_t CC1101::read (Message& msg, uint32_t timeout) {
uint8_t num = 0;
uint32_t time=0;
do {
num = read(msg);
if( num == 0 ) {
delay(50); // wait 50ms
time += 50;
}
}
while( num == 0 && time < timeout );
return num;
}
bool CC1101::write (const Message& msg, uint8_t burst) {
memcpy(sbuffer.buffer(),msg.buffer(),msg.length());
sbuffer.length(msg.length());
sbuffer.encode();
return radio.sndData(sbuffer.buffer(),sbuffer.length(),burst);
}
bool CC1101::write (const Message& msg, uint8_t burst, uint8_t maxretry, uint32_t timeout) {
return false;
}
}