Ilya Krylov / sx12xx_hal123

1

radio_sx127x.cpp@13:a354f82d12d9, 2019-05-31 (annotated)

Committer:
Wayne Roberts
Date:
Fri May 31 10:21:30 2019 -0700
Revision:
13:a354f82d12d9
Parent:
10:3303cf2867d4
Child:
15:e1c04ec39aa4
symbol timeout to 16bits.  Add spi clk freq initialization option.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Wayne Roberts 0:9c052ff8dd6a 1 #include "radio.h"
Wayne Roberts 0:9c052ff8dd6a 2 #ifdef SX127x_H
Wayne Roberts 0:9c052ff8dd6a 3
Wayne Roberts 0:9c052ff8dd6a 4 LowPowerTimer Radio::lpt;
Wayne Roberts 0:9c052ff8dd6a 5
Wayne Roberts 0:9c052ff8dd6a 6 void Radio::Sleep()
Wayne Roberts 0:9c052ff8dd6a 7 {
Wayne Roberts 0:9c052ff8dd6a 8 radio.set_opmode(RF_OPMODE_SLEEP);
Wayne Roberts 0:9c052ff8dd6a 9 }
Wayne Roberts 0:9c052ff8dd6a 10
Wayne Roberts 0:9c052ff8dd6a 11 void Radio::Standby()
Wayne Roberts 0:9c052ff8dd6a 12 {
Wayne Roberts 0:9c052ff8dd6a 13 radio.set_opmode(RF_OPMODE_STANDBY);
Wayne Roberts 0:9c052ff8dd6a 14 }
Wayne Roberts 0:9c052ff8dd6a 15
Wayne Roberts 0:9c052ff8dd6a 16 bool Radio::CheckRfFrequency(unsigned hz)
Wayne Roberts 0:9c052ff8dd6a 17 {
Wayne Roberts 0:9c052ff8dd6a 18 return true;
Wayne Roberts 0:9c052ff8dd6a 19 }
Wayne Roberts 0:9c052ff8dd6a 20
Wayne Roberts 0:9c052ff8dd6a 21 void Radio::SetChannel(unsigned hz)
Wayne Roberts 0:9c052ff8dd6a 22 {
Wayne Roberts 0:9c052ff8dd6a 23 radio.set_frf_MHz(hz / 1000000.0);
Wayne Roberts 0:9c052ff8dd6a 24 }
Wayne Roberts 0:9c052ff8dd6a 25
Wayne Roberts 0:9c052ff8dd6a 26 float Radio::getFrfMHz()
Wayne Roberts 0:9c052ff8dd6a 27 {
Wayne Roberts 0:9c052ff8dd6a 28 return radio.get_frf_MHz();
Wayne Roberts 0:9c052ff8dd6a 29 }
Wayne Roberts 0:9c052ff8dd6a 30
Wayne Roberts 0:9c052ff8dd6a 31 LowPowerTimeout TxTimeoutEvent;
Wayne Roberts 0:9c052ff8dd6a 32
Wayne Roberts 0:9c052ff8dd6a 33 void SX1272OnTimeoutIrq( void )
Wayne Roberts 0:9c052ff8dd6a 34 {
Wayne Roberts 0:9c052ff8dd6a 35 Radio::radio.set_opmode(RF_OPMODE_STANDBY);
Wayne Roberts 0:9c052ff8dd6a 36 }
Wayne Roberts 0:9c052ff8dd6a 37
Wayne Roberts 0:9c052ff8dd6a 38 void Radio::SetTxContinuousWave(unsigned hz, int8_t dbm, unsigned timeout_us)
Wayne Roberts 0:9c052ff8dd6a 39 {
Wayne Roberts 0:9c052ff8dd6a 40 Radio::SetChannel(hz);
Wayne Roberts 0:9c052ff8dd6a 41 /* TODO: fsk enable, set regPacketConfig2.datamode */
Wayne Roberts 0:9c052ff8dd6a 42 set_tx_dbm(dbm);
Wayne Roberts 0:9c052ff8dd6a 43 TxTimeoutEvent.attach_us(SX1272OnTimeoutIrq, timeout_us);
Wayne Roberts 0:9c052ff8dd6a 44 radio.set_opmode(RF_OPMODE_TRANSMITTER);
Wayne Roberts 0:9c052ff8dd6a 45 }
Wayne Roberts 0:9c052ff8dd6a 46
Wayne Roberts 0:9c052ff8dd6a 47 #define LORA_MAC_PRIVATE_SYNCWORD 0x12
Wayne Roberts 0:9c052ff8dd6a 48 #define LORA_MAC_PUBLIC_SYNCWORD 0x34
Wayne Roberts 0:9c052ff8dd6a 49 void Radio::SetPublicNetwork(bool en)
Wayne Roberts 0:9c052ff8dd6a 50 {
Wayne Roberts 0:9c052ff8dd6a 51 radio.write_reg(REG_LR_SYNC_BYTE, en ? LORA_MAC_PUBLIC_SYNCWORD : LORA_MAC_PRIVATE_SYNCWORD);
Wayne Roberts 0:9c052ff8dd6a 52 }
Wayne Roberts 0:9c052ff8dd6a 53
Wayne Roberts 0:9c052ff8dd6a 54 uint32_t Radio::Random(void)
Wayne Roberts 0:9c052ff8dd6a 55 {
Wayne Roberts 0:9c052ff8dd6a 56 uint32_t ret = 0;
Wayne Roberts 0:9c052ff8dd6a 57 unsigned i;
Wayne Roberts 0:9c052ff8dd6a 58
Wayne Roberts 0:9c052ff8dd6a 59 radio.set_opmode(RF_OPMODE_RECEIVER);
Wayne Roberts 0:9c052ff8dd6a 60 for (i = 0; i < 32; i++) {
Wayne Roberts 0:9c052ff8dd6a 61 uint32_t r;
Wayne Roberts 0:9c052ff8dd6a 62 wait_us(3000);
Wayne Roberts 0:9c052ff8dd6a 63 r = radio.read_reg(REG_LR_WIDEBAND_RSSI);
Wayne Roberts 0:9c052ff8dd6a 64 r <<= ((i & 7) << 2);
Wayne Roberts 0:9c052ff8dd6a 65 ret ^= r;
Wayne Roberts 0:9c052ff8dd6a 66 }
Wayne Roberts 0:9c052ff8dd6a 67
Wayne Roberts 0:9c052ff8dd6a 68 return ret;
Wayne Roberts 0:9c052ff8dd6a 69 }
Wayne Roberts 0:9c052ff8dd6a 70
Wayne Roberts 0:9c052ff8dd6a 71 void Radio::LoRaPacketConfig(unsigned preambleLen, bool fixLen, bool crcOn, bool invIQ)
Wayne Roberts 0:9c052ff8dd6a 72 {
Wayne Roberts 0:9c052ff8dd6a 73 lora.RegPreamble = preambleLen;
Wayne Roberts 0:9c052ff8dd6a 74 radio.write_u16(REG_LR_PREAMBLEMSB, lora.RegPreamble);
Wayne Roberts 0:9c052ff8dd6a 75
Wayne Roberts 0:9c052ff8dd6a 76 if (radio.type == SX1276) {
Wayne Roberts 0:9c052ff8dd6a 77 lora.RegModemConfig.sx1276bits.ImplicitHeaderModeOn = fixLen;
Wayne Roberts 0:9c052ff8dd6a 78 lora.RegModemConfig2.sx1276bits.RxPayloadCrcOn = crcOn;
Wayne Roberts 0:9c052ff8dd6a 79 radio.write_reg(REG_LR_MODEMCONFIG2, lora.RegModemConfig2.octet);
Wayne Roberts 0:9c052ff8dd6a 80 } else if (radio.type == SX1272) {
Wayne Roberts 0:9c052ff8dd6a 81 lora.RegModemConfig.sx1272bits.ImplicitHeaderModeOn = fixLen;
Wayne Roberts 0:9c052ff8dd6a 82 lora.RegModemConfig.sx1272bits.RxPayloadCrcOn = crcOn;
Wayne Roberts 0:9c052ff8dd6a 83 }
Wayne Roberts 0:9c052ff8dd6a 84
Wayne Roberts 0:9c052ff8dd6a 85 radio.write_reg(REG_LR_MODEMCONFIG, lora.RegModemConfig.octet);
Wayne Roberts 0:9c052ff8dd6a 86
Wayne Roberts 0:9c052ff8dd6a 87 lora.invert_tx(invIQ);
Wayne Roberts 0:9c052ff8dd6a 88 lora.invert_rx(invIQ);
Wayne Roberts 0:9c052ff8dd6a 89 }
Wayne Roberts 0:9c052ff8dd6a 90
Wayne Roberts 0:9c052ff8dd6a 91 void Radio::GFSKModemConfig(unsigned bps, unsigned bw_hz, unsigned fdev_hz)
Wayne Roberts 0:9c052ff8dd6a 92 {
Wayne Roberts 0:9c052ff8dd6a 93 if (radio.RegOpMode.bits.LongRangeMode)
Wayne Roberts 0:9c052ff8dd6a 94 fsk.enable(false);
Wayne Roberts 0:9c052ff8dd6a 95
Wayne Roberts 0:9c052ff8dd6a 96 fsk.set_bitrate(bps);
Wayne Roberts 0:9c052ff8dd6a 97
Wayne Roberts 0:9c052ff8dd6a 98 fsk.set_rx_dcc_bw_hz(bw_hz, 0);
Wayne Roberts 0:9c052ff8dd6a 99 fsk.set_rx_dcc_bw_hz(bw_hz * 1.5, 1);
Wayne Roberts 0:9c052ff8dd6a 100
Wayne Roberts 0:9c052ff8dd6a 101 fsk.set_tx_fdev_hz(fdev_hz);
Wayne Roberts 0:9c052ff8dd6a 102 }
Wayne Roberts 0:9c052ff8dd6a 103
Wayne Roberts 0:9c052ff8dd6a 104
Wayne Roberts 0:9c052ff8dd6a 105 void Radio::GFSKPacketConfig(unsigned preambleLen, bool fixLen, bool crcOn)
Wayne Roberts 0:9c052ff8dd6a 106 {
Wayne Roberts 0:9c052ff8dd6a 107 if (radio.RegOpMode.bits.LongRangeMode)
Wayne Roberts 0:9c052ff8dd6a 108 fsk.enable(false);
Wayne Roberts 0:9c052ff8dd6a 109
Wayne Roberts 0:9c052ff8dd6a 110 radio.write_u16(REG_FSK_PREAMBLEMSB, preambleLen);
Wayne Roberts 0:9c052ff8dd6a 111
Wayne Roberts 0:9c052ff8dd6a 112 fsk.RegPktConfig1.bits.PacketFormatVariable = fixLen ? 0 : 1;
Wayne Roberts 0:9c052ff8dd6a 113 fsk.RegPktConfig1.bits.CrcOn = crcOn;
Wayne Roberts 0:9c052ff8dd6a 114 radio.write_reg(REG_FSK_PACKETCONFIG1, fsk.RegPktConfig1.octet);
Wayne Roberts 0:9c052ff8dd6a 115 }
Wayne Roberts 0:9c052ff8dd6a 116
Wayne Roberts 13:a354f82d12d9 117 void Radio::SetLoRaSymbolTimeout(uint16_t symbs)
Wayne Roberts 0:9c052ff8dd6a 118 {
Wayne Roberts 0:9c052ff8dd6a 119 if (!radio.RegOpMode.bits.LongRangeMode)
Wayne Roberts 0:9c052ff8dd6a 120 lora.enable();
Wayne Roberts 0:9c052ff8dd6a 121
Wayne Roberts 13:a354f82d12d9 122 radio.write_reg(REG_LR_SYMBTIMEOUTLSB, symbs & 0xff);
Wayne Roberts 13:a354f82d12d9 123 symbs >>= 8;
Wayne Roberts 13:a354f82d12d9 124 lora.RegModemConfig2.sx1272bits.SymbTimeoutMsb = symbs;
Wayne Roberts 0:9c052ff8dd6a 125 radio.write_reg(REG_LR_MODEMCONFIG2, lora.RegModemConfig2.octet);
Wayne Roberts 0:9c052ff8dd6a 126 }
Wayne Roberts 0:9c052ff8dd6a 127
Wayne Roberts 0:9c052ff8dd6a 128 void Radio::LoRaModemConfig(unsigned bwKHz, uint8_t sf, uint8_t coderate)
Wayne Roberts 0:9c052ff8dd6a 129 {
Wayne Roberts 0:9c052ff8dd6a 130 float sp;
Wayne Roberts 0:9c052ff8dd6a 131 if (!radio.RegOpMode.bits.LongRangeMode)
Wayne Roberts 0:9c052ff8dd6a 132 lora.enable();
Wayne Roberts 0:9c052ff8dd6a 133
Wayne Roberts 0:9c052ff8dd6a 134 lora.RegModemConfig2.sx1276bits.SpreadingFactor = sf;
Wayne Roberts 0:9c052ff8dd6a 135 radio.write_reg(REG_LR_MODEMCONFIG2, lora.RegModemConfig2.octet);
Wayne Roberts 0:9c052ff8dd6a 136
Wayne Roberts 0:9c052ff8dd6a 137 lora.setBw_KHz(bwKHz);
Wayne Roberts 0:9c052ff8dd6a 138
Wayne Roberts 0:9c052ff8dd6a 139 if (radio.type == SX1276) {
Wayne Roberts 0:9c052ff8dd6a 140 lora.RegModemConfig.sx1276bits.CodingRate = coderate;
Wayne Roberts 0:9c052ff8dd6a 141
Wayne Roberts 0:9c052ff8dd6a 142 sp = lora.get_symbol_period();
Wayne Roberts 0:9c052ff8dd6a 143 if (sp > 16)
Wayne Roberts 0:9c052ff8dd6a 144 lora.RegModemConfig3.sx1276bits.LowDataRateOptimize = 1;
Wayne Roberts 0:9c052ff8dd6a 145 else
Wayne Roberts 0:9c052ff8dd6a 146 lora.RegModemConfig3.sx1276bits.LowDataRateOptimize = 0;
Wayne Roberts 0:9c052ff8dd6a 147
Wayne Roberts 0:9c052ff8dd6a 148 radio.write_reg(REG_LR_MODEMCONFIG3, lora.RegModemConfig3.octet);
Wayne Roberts 0:9c052ff8dd6a 149 } else if (radio.type == SX1272) {
Wayne Roberts 0:9c052ff8dd6a 150 lora.RegModemConfig.sx1272bits.CodingRate = coderate;
Wayne Roberts 0:9c052ff8dd6a 151
Wayne Roberts 0:9c052ff8dd6a 152 if (lora.get_symbol_period() > 16)
Wayne Roberts 0:9c052ff8dd6a 153 lora.RegModemConfig.sx1272bits.LowDataRateOptimize = 1;
Wayne Roberts 0:9c052ff8dd6a 154 else
Wayne Roberts 0:9c052ff8dd6a 155 lora.RegModemConfig.sx1272bits.LowDataRateOptimize = 0;
Wayne Roberts 0:9c052ff8dd6a 156 }
Wayne Roberts 0:9c052ff8dd6a 157 radio.write_reg(REG_LR_MODEMCONFIG, lora.RegModemConfig.octet);
Wayne Roberts 0:9c052ff8dd6a 158 }
Wayne Roberts 0:9c052ff8dd6a 159
Wayne Roberts 1:e79b0a55135f 160 void Radio::SetRxMaxPayloadLength(uint8_t max)
Wayne Roberts 0:9c052ff8dd6a 161 {
Wayne Roberts 1:e79b0a55135f 162 if (radio.RegOpMode.bits.LongRangeMode)
Wayne Roberts 1:e79b0a55135f 163 radio.write_reg(REG_LR_RX_MAX_PAYLOADLENGTH, max);
Wayne Roberts 1:e79b0a55135f 164 else
Wayne Roberts 1:e79b0a55135f 165 radio.write_reg(REG_FSK_PAYLOADLENGTH, max);
Wayne Roberts 0:9c052ff8dd6a 166 }
Wayne Roberts 0:9c052ff8dd6a 167
Wayne Roberts 6:b7bbf31e06e4 168 void Radio::SetFixedPayloadLength(uint8_t len)
Wayne Roberts 6:b7bbf31e06e4 169 {
Wayne Roberts 6:b7bbf31e06e4 170 lora.RegPayloadLength = len;
Wayne Roberts 6:b7bbf31e06e4 171 radio.write_reg(REG_LR_PAYLOADLENGTH, lora.RegPayloadLength);
Wayne Roberts 6:b7bbf31e06e4 172 }
Wayne Roberts 6:b7bbf31e06e4 173
Wayne Roberts 0:9c052ff8dd6a 174 const RadioEvents_t* RadioEvents;
Wayne Roberts 0:9c052ff8dd6a 175
Wayne Roberts 0:9c052ff8dd6a 176
Wayne Roberts 0:9c052ff8dd6a 177 volatile struct pe {
Wayne Roberts 0:9c052ff8dd6a 178 uint8_t dio0 : 1;
Wayne Roberts 0:9c052ff8dd6a 179 uint8_t dio1 : 1;
Wayne Roberts 0:9c052ff8dd6a 180 uint8_t txing : 1;
Wayne Roberts 0:9c052ff8dd6a 181 } pinEvent;
Wayne Roberts 0:9c052ff8dd6a 182
Wayne Roberts 0:9c052ff8dd6a 183 void
Wayne Roberts 0:9c052ff8dd6a 184 Radio::dio0UserContext()
Wayne Roberts 0:9c052ff8dd6a 185 {
Wayne Roberts 0:9c052ff8dd6a 186 service_action_e act = lora.service();
Wayne Roberts 0:9c052ff8dd6a 187
Wayne Roberts 0:9c052ff8dd6a 188 if (!pinEvent.txing) {
Wayne Roberts 0:9c052ff8dd6a 189 if (act == SERVICE_READ_FIFO && RadioEvents->RxDone) {
Wayne Roberts 0:9c052ff8dd6a 190 int8_t rssi;
Wayne Roberts 0:9c052ff8dd6a 191 float snr = lora.RegPktSnrValue / 4.0;
Wayne Roberts 0:9c052ff8dd6a 192
Wayne Roberts 0:9c052ff8dd6a 193 rssi = lora.get_pkt_rssi();
Wayne Roberts 0:9c052ff8dd6a 194 if (snr < 0)
Wayne Roberts 0:9c052ff8dd6a 195 rssi += snr;
Wayne Roberts 0:9c052ff8dd6a 196 RadioEvents->RxDone(lora.RegRxNbBytes, rssi, snr);
Wayne Roberts 0:9c052ff8dd6a 197 }
Wayne Roberts 0:9c052ff8dd6a 198 } else if (act == SERVICE_TX_DONE) {
Wayne Roberts 0:9c052ff8dd6a 199 if (RadioEvents->TxDone_botHalf)
Wayne Roberts 0:9c052ff8dd6a 200 RadioEvents->TxDone_botHalf();
Wayne Roberts 0:9c052ff8dd6a 201 }
Wayne Roberts 0:9c052ff8dd6a 202 }
Wayne Roberts 0:9c052ff8dd6a 203
Wayne Roberts 0:9c052ff8dd6a 204 volatile us_timestamp_t Radio::irqAt;
Wayne Roberts 0:9c052ff8dd6a 205
Wayne Roberts 0:9c052ff8dd6a 206 void Radio::dio0isr()
Wayne Roberts 0:9c052ff8dd6a 207 {
Wayne Roberts 0:9c052ff8dd6a 208 irqAt = lpt.read_us();
Wayne Roberts 0:9c052ff8dd6a 209
Wayne Roberts 0:9c052ff8dd6a 210 if (pinEvent.txing) {
Wayne Roberts 0:9c052ff8dd6a 211 /* TxDone handling requires low latency */
Wayne Roberts 0:9c052ff8dd6a 212 if (RadioEvents->TxDone_topHalf)
Wayne Roberts 0:9c052ff8dd6a 213 RadioEvents->TxDone_topHalf(); // TODO in callback read irqAt for timestamp of interrupt
Wayne Roberts 0:9c052ff8dd6a 214
Wayne Roberts 0:9c052ff8dd6a 215 }
Wayne Roberts 0:9c052ff8dd6a 216
Wayne Roberts 0:9c052ff8dd6a 217 pinEvent.dio0 = 1;
Wayne Roberts 0:9c052ff8dd6a 218 }
Wayne Roberts 0:9c052ff8dd6a 219
Wayne Roberts 0:9c052ff8dd6a 220 void Radio::dio1UserContext()
Wayne Roberts 0:9c052ff8dd6a 221 {
Wayne Roberts 0:9c052ff8dd6a 222 lora.RegIrqFlags.octet = radio.read_reg(REG_LR_IRQFLAGS);
Wayne Roberts 0:9c052ff8dd6a 223
Wayne Roberts 0:9c052ff8dd6a 224 if (RadioEvents->RxTimeout)
Wayne Roberts 0:9c052ff8dd6a 225 RadioEvents->RxTimeout();
Wayne Roberts 0:9c052ff8dd6a 226
Wayne Roberts 0:9c052ff8dd6a 227 radio.write_reg(REG_LR_IRQFLAGS, 0x80); // ensure RxTimeout is cleared
Wayne Roberts 0:9c052ff8dd6a 228 }
Wayne Roberts 0:9c052ff8dd6a 229
Wayne Roberts 0:9c052ff8dd6a 230 void Radio::dio1isr()
Wayne Roberts 0:9c052ff8dd6a 231 {
Wayne Roberts 0:9c052ff8dd6a 232 pinEvent.dio1 = 1;
Wayne Roberts 0:9c052ff8dd6a 233 }
Wayne Roberts 0:9c052ff8dd6a 234
Wayne Roberts 13:a354f82d12d9 235 void Radio::Init(const RadioEvents_t* e, unsigned spi_hz)
Wayne Roberts 0:9c052ff8dd6a 236 {
Wayne Roberts 13:a354f82d12d9 237 radio.m_spi.frequency(spi_hz);
Wayne Roberts 13:a354f82d12d9 238
Wayne Roberts 8:0518c6e68b79 239 while (radio.dio0.read() || radio.dio1.read()) {
Wayne Roberts 8:0518c6e68b79 240 radio.write_reg(REG_LR_IRQFLAGS, 0xff); // clear stagnant interrupt
Wayne Roberts 8:0518c6e68b79 241 }
Wayne Roberts 0:9c052ff8dd6a 242 dio0.rise(dio0isr);
Wayne Roberts 0:9c052ff8dd6a 243 dio1.rise(dio1isr);
Wayne Roberts 0:9c052ff8dd6a 244
Wayne Roberts 0:9c052ff8dd6a 245 radio.rf_switch = rfsw_callback;
Wayne Roberts 0:9c052ff8dd6a 246 boardInit();
Wayne Roberts 0:9c052ff8dd6a 247
Wayne Roberts 0:9c052ff8dd6a 248 RadioEvents = e;
Wayne Roberts 0:9c052ff8dd6a 249 lpt.start();
Wayne Roberts 0:9c052ff8dd6a 250 }
Wayne Roberts 0:9c052ff8dd6a 251
Wayne Roberts 7:ba81f66e56d1 252 float Radio::GetRssiInst()
Wayne Roberts 7:ba81f66e56d1 253 {
Wayne Roberts 7:ba81f66e56d1 254 return lora.get_current_rssi();
Wayne Roberts 7:ba81f66e56d1 255 }
Wayne Roberts 7:ba81f66e56d1 256
Wayne Roberts 0:9c052ff8dd6a 257 int Radio::Send(uint8_t size, timestamp_t maxListenTime, timestamp_t channelFreeTime, int rssiThresh)
Wayne Roberts 0:9c052ff8dd6a 258 {
Wayne Roberts 0:9c052ff8dd6a 259 if (radio.RegOpMode.bits.Mode == RF_OPMODE_SLEEP) {
Wayne Roberts 0:9c052ff8dd6a 260 radio.set_opmode(RF_OPMODE_STANDBY);
Wayne Roberts 0:9c052ff8dd6a 261 wait_us(1000);
Wayne Roberts 0:9c052ff8dd6a 262 }
Wayne Roberts 0:9c052ff8dd6a 263 radio.write_reg(REG_LR_IRQFLAGS, 0x08); // ensure TxDone is cleared
Wayne Roberts 0:9c052ff8dd6a 264 lora.RegPayloadLength = size;
Wayne Roberts 0:9c052ff8dd6a 265 radio.write_reg(REG_LR_PAYLOADLENGTH, lora.RegPayloadLength);
Wayne Roberts 0:9c052ff8dd6a 266
Wayne Roberts 0:9c052ff8dd6a 267 if (maxListenTime > 0) {
Wayne Roberts 0:9c052ff8dd6a 268 int rssi;
Wayne Roberts 0:9c052ff8dd6a 269 us_timestamp_t startAt, chFreeAt, now;
Wayne Roberts 0:9c052ff8dd6a 270 lora.start_rx(RF_OPMODE_RECEIVER);
Wayne Roberts 0:9c052ff8dd6a 271 startAt = lpt.read_us();
Wayne Roberts 0:9c052ff8dd6a 272 Lstart:
Wayne Roberts 0:9c052ff8dd6a 273 do {
Wayne Roberts 0:9c052ff8dd6a 274 now = lpt.read_us();
Wayne Roberts 0:9c052ff8dd6a 275 if ((now - startAt) > maxListenTime) {
Wayne Roberts 0:9c052ff8dd6a 276 return -1;
Wayne Roberts 0:9c052ff8dd6a 277 }
Wayne Roberts 0:9c052ff8dd6a 278 rssi = lora.get_current_rssi();
Wayne Roberts 0:9c052ff8dd6a 279 } while (rssi > rssiThresh);
Wayne Roberts 0:9c052ff8dd6a 280 chFreeAt = lpt.read_us();
Wayne Roberts 0:9c052ff8dd6a 281 do {
Wayne Roberts 0:9c052ff8dd6a 282 now = lpt.read_us();
Wayne Roberts 0:9c052ff8dd6a 283 rssi = lora.get_current_rssi();
Wayne Roberts 0:9c052ff8dd6a 284 if (rssi > rssiThresh) {
Wayne Roberts 0:9c052ff8dd6a 285 goto Lstart;
Wayne Roberts 0:9c052ff8dd6a 286 }
Wayne Roberts 0:9c052ff8dd6a 287 } while ((now - chFreeAt) < channelFreeTime);
Wayne Roberts 0:9c052ff8dd6a 288 }
Wayne Roberts 0:9c052ff8dd6a 289
Wayne Roberts 0:9c052ff8dd6a 290 lora.start_tx(size);
Wayne Roberts 0:9c052ff8dd6a 291 pinEvent.txing = 1;
Wayne Roberts 0:9c052ff8dd6a 292
Wayne Roberts 0:9c052ff8dd6a 293 return 0;
Wayne Roberts 0:9c052ff8dd6a 294 }
Wayne Roberts 0:9c052ff8dd6a 295
Wayne Roberts 0:9c052ff8dd6a 296 void Radio::Rx(unsigned timeout)
Wayne Roberts 0:9c052ff8dd6a 297 {
Wayne Roberts 0:9c052ff8dd6a 298 if (timeout == 0) {
Wayne Roberts 0:9c052ff8dd6a 299 lora.start_rx(RF_OPMODE_RECEIVER);
Wayne Roberts 0:9c052ff8dd6a 300 } else {
Wayne Roberts 0:9c052ff8dd6a 301 lora.start_rx(RF_OPMODE_RECEIVER_SINGLE);
Wayne Roberts 0:9c052ff8dd6a 302 }
Wayne Roberts 0:9c052ff8dd6a 303
Wayne Roberts 0:9c052ff8dd6a 304 pinEvent.txing = 0;
Wayne Roberts 0:9c052ff8dd6a 305 }
Wayne Roberts 0:9c052ff8dd6a 306
Wayne Roberts 0:9c052ff8dd6a 307
Wayne Roberts 0:9c052ff8dd6a 308 void Radio::ocp(uint8_t ma)
Wayne Roberts 0:9c052ff8dd6a 309 {
Wayne Roberts 0:9c052ff8dd6a 310 if (ma < 130)
Wayne Roberts 0:9c052ff8dd6a 311 radio.RegOcp.bits.OcpTrim = (ma - 45) / 5;
Wayne Roberts 0:9c052ff8dd6a 312 else
Wayne Roberts 0:9c052ff8dd6a 313 radio.RegOcp.bits.OcpTrim = (ma + 30) / 10;
Wayne Roberts 0:9c052ff8dd6a 314 radio.write_reg(REG_OCP, radio.RegOcp.octet);
Wayne Roberts 0:9c052ff8dd6a 315
Wayne Roberts 0:9c052ff8dd6a 316 radio.RegOcp.octet = radio.read_reg(REG_OCP);
Wayne Roberts 0:9c052ff8dd6a 317 if (radio.RegOcp.bits.OcpTrim < 16)
Wayne Roberts 0:9c052ff8dd6a 318 ma = 45 + (5 * radio.RegOcp.bits.OcpTrim);
Wayne Roberts 0:9c052ff8dd6a 319 else if (radio.RegOcp.bits.OcpTrim < 28)
Wayne Roberts 0:9c052ff8dd6a 320 ma = (10 * radio.RegOcp.bits.OcpTrim) - 30;
Wayne Roberts 0:9c052ff8dd6a 321 else
Wayne Roberts 0:9c052ff8dd6a 322 ma = 240;
Wayne Roberts 0:9c052ff8dd6a 323 }
Wayne Roberts 0:9c052ff8dd6a 324
Wayne Roberts 0:9c052ff8dd6a 325
Wayne Roberts 0:9c052ff8dd6a 326 #if 0
Wayne Roberts 0:9c052ff8dd6a 327 void Radio::PrintStatus()
Wayne Roberts 0:9c052ff8dd6a 328 {
Wayne Roberts 0:9c052ff8dd6a 329 #ifdef MAC_DEBUG
Wayne Roberts 0:9c052ff8dd6a 330 radio.RegOpMode.octet = radio.read_reg(REG_OPMODE);
Wayne Roberts 0:9c052ff8dd6a 331 switch (radio.RegOpMode.bits.Mode) {
Wayne Roberts 0:9c052ff8dd6a 332 case RF_OPMODE_SLEEP: printf("SLEEP "); break;
Wayne Roberts 0:9c052ff8dd6a 333 case RF_OPMODE_STANDBY: printf("STBY "); break;
Wayne Roberts 0:9c052ff8dd6a 334 case RF_OPMODE_SYNTHESIZER_TX: printf("FSTX "); break;
Wayne Roberts 0:9c052ff8dd6a 335 case RF_OPMODE_TRANSMITTER: printf("TX "); break;
Wayne Roberts 0:9c052ff8dd6a 336 case RF_OPMODE_SYNTHESIZER_RX: printf("FSRX "); break;
Wayne Roberts 0:9c052ff8dd6a 337 case RF_OPMODE_RECEIVER: printf("RXC "); break;
Wayne Roberts 0:9c052ff8dd6a 338 case RF_OPMODE_RECEIVER_SINGLE: printf("RXS "); break;
Wayne Roberts 0:9c052ff8dd6a 339 case RF_OPMODE_CAD: printf("CAD "); break;
Wayne Roberts 0:9c052ff8dd6a 340 }
Wayne Roberts 0:9c052ff8dd6a 341
Wayne Roberts 0:9c052ff8dd6a 342 printf("dio:%u:%u opmode:%02x %.2fMHz sf%ubw%u ", radio.dio0.read(), radio.dio1.read(), radio.RegOpMode.octet, radio.get_frf_MHz(), lora.getSf(), lora.getBw());
Wayne Roberts 0:9c052ff8dd6a 343 lora.RegIrqFlags.octet = radio.read_reg(REG_LR_IRQFLAGS);
Wayne Roberts 0:9c052ff8dd6a 344 printf("irqFlags:%02x\r\n", lora.RegIrqFlags.octet);
Wayne Roberts 0:9c052ff8dd6a 345 #endif /* MAC_DEBUG */
Wayne Roberts 0:9c052ff8dd6a 346 }
Wayne Roberts 0:9c052ff8dd6a 347 #endif /* if 0 */
Wayne Roberts 0:9c052ff8dd6a 348
Wayne Roberts 0:9c052ff8dd6a 349 #ifdef DUTY_ENABLE
Wayne Roberts 0:9c052ff8dd6a 350 us_timestamp_t
Wayne Roberts 0:9c052ff8dd6a 351 Radio::TimeOnAir(RadioModems_t m, uint8_t pktLen)
Wayne Roberts 0:9c052ff8dd6a 352 {
Wayne Roberts 0:9c052ff8dd6a 353 uint32_t airTime = 0;
Wayne Roberts 0:9c052ff8dd6a 354
Wayne Roberts 0:9c052ff8dd6a 355 switch (m)
Wayne Roberts 0:9c052ff8dd6a 356 {
Wayne Roberts 0:9c052ff8dd6a 357 case MODEM_FSK:
Wayne Roberts 0:9c052ff8dd6a 358 {
Wayne Roberts 0:9c052ff8dd6a 359 /* TODO
Wayne Roberts 0:9c052ff8dd6a 360 airTime = round( ( 8 * ( SX1272.Settings.Fsk.PreambleLen +
Wayne Roberts 0:9c052ff8dd6a 361 ( ( SX1272Read( REG_SYNCCONFIG ) & ~RF_SYNCCONFIG_SYNCSIZE_MASK ) + 1 ) +
Wayne Roberts 0:9c052ff8dd6a 362 ( ( SX1272.Settings.Fsk.FixLen == 0x01 ) ? 0.0 : 1.0 ) +
Wayne Roberts 0:9c052ff8dd6a 363 ( ( ( SX1272Read( REG_PACKETCONFIG1 ) & ~RF_PACKETCONFIG1_ADDRSFILTERING_MASK ) != 0x00 ) ? 1.0 : 0 ) +
Wayne Roberts 0:9c052ff8dd6a 364 pktLen +
Wayne Roberts 0:9c052ff8dd6a 365 ( ( SX1272.Settings.Fsk.CrcOn == 0x01 ) ? 2.0 : 0 ) ) /
Wayne Roberts 0:9c052ff8dd6a 366 SX1272.Settings.Fsk.Datarate ) * 1e3 );
Wayne Roberts 0:9c052ff8dd6a 367 */
Wayne Roberts 0:9c052ff8dd6a 368 }
Wayne Roberts 0:9c052ff8dd6a 369 break;
Wayne Roberts 0:9c052ff8dd6a 370 case MODEM_LORA:
Wayne Roberts 0:9c052ff8dd6a 371 {
Wayne Roberts 0:9c052ff8dd6a 372 double bw = 0.0;
Wayne Roberts 0:9c052ff8dd6a 373 uint8_t fixLen, bandwidth, LowDatarateOptimize, coderate, crcOn ;
Wayne Roberts 0:9c052ff8dd6a 374 if (radio.type == SX1276) {
Wayne Roberts 0:9c052ff8dd6a 375 coderate = lora.RegModemConfig.sx1276bits.CodingRate;
Wayne Roberts 0:9c052ff8dd6a 376 LowDatarateOptimize = lora.RegModemConfig3.sx1276bits.LowDataRateOptimize;
Wayne Roberts 0:9c052ff8dd6a 377 fixLen = lora.RegModemConfig.sx1276bits.ImplicitHeaderModeOn;
Wayne Roberts 0:9c052ff8dd6a 378 bandwidth = lora.RegModemConfig.sx1276bits.Bw - 7;
Wayne Roberts 0:9c052ff8dd6a 379 crcOn = lora.RegModemConfig2.sx1276bits.RxPayloadCrcOn;
Wayne Roberts 0:9c052ff8dd6a 380 } else if (radio.type == SX1272) {
Wayne Roberts 0:9c052ff8dd6a 381 coderate = lora.RegModemConfig.sx1272bits.CodingRate;
Wayne Roberts 0:9c052ff8dd6a 382 LowDatarateOptimize = lora.RegModemConfig.sx1272bits.LowDataRateOptimize;
Wayne Roberts 0:9c052ff8dd6a 383 fixLen = lora.RegModemConfig.sx1272bits.ImplicitHeaderModeOn;
Wayne Roberts 0:9c052ff8dd6a 384 bandwidth = lora.RegModemConfig.sx1272bits.Bw;
Wayne Roberts 0:9c052ff8dd6a 385 crcOn = lora.RegModemConfig.sx1272bits.RxPayloadCrcOn;
Wayne Roberts 0:9c052ff8dd6a 386 } else
Wayne Roberts 0:9c052ff8dd6a 387 return 0;
Wayne Roberts 0:9c052ff8dd6a 388
Wayne Roberts 0:9c052ff8dd6a 389 switch( bandwidth )
Wayne Roberts 0:9c052ff8dd6a 390 {
Wayne Roberts 0:9c052ff8dd6a 391 case 0: // 125 kHz
Wayne Roberts 0:9c052ff8dd6a 392 bw = 125;//ms: 125e3;
Wayne Roberts 0:9c052ff8dd6a 393 break;
Wayne Roberts 0:9c052ff8dd6a 394 case 1: // 250 kHz
Wayne Roberts 0:9c052ff8dd6a 395 bw = 250;//ms:250e3;
Wayne Roberts 0:9c052ff8dd6a 396 break;
Wayne Roberts 0:9c052ff8dd6a 397 case 2: // 500 kHz
Wayne Roberts 0:9c052ff8dd6a 398 bw = 500;//ms:500e3;
Wayne Roberts 0:9c052ff8dd6a 399 break;
Wayne Roberts 0:9c052ff8dd6a 400 }
Wayne Roberts 0:9c052ff8dd6a 401
Wayne Roberts 0:9c052ff8dd6a 402 // Symbol rate : time for one symbol (secs)
Wayne Roberts 0:9c052ff8dd6a 403 double rs = bw / ( 1 << lora.RegModemConfig2.sx1276bits.SpreadingFactor );
Wayne Roberts 0:9c052ff8dd6a 404 double ts = 1 / rs;
Wayne Roberts 0:9c052ff8dd6a 405 // time of preamble
Wayne Roberts 0:9c052ff8dd6a 406 double tPreamble;
Wayne Roberts 0:9c052ff8dd6a 407 tPreamble = (lora.RegPreamble + 4.25 ) * ts;
Wayne Roberts 0:9c052ff8dd6a 408 // Symbol length of payload and time
Wayne Roberts 0:9c052ff8dd6a 409 double tmp = ceil( ( 8 * pktLen - 4 * lora.RegModemConfig2.sx1276bits.SpreadingFactor +
Wayne Roberts 0:9c052ff8dd6a 410 28 + 16 * crcOn -
Wayne Roberts 0:9c052ff8dd6a 411 ( fixLen ? 20 : 0 ) ) /
Wayne Roberts 0:9c052ff8dd6a 412 ( double )( 4 * ( lora.RegModemConfig2.sx1276bits.SpreadingFactor -
Wayne Roberts 0:9c052ff8dd6a 413 ( ( LowDatarateOptimize > 0 ) ? 2 : 0 ) ) ) ) *
Wayne Roberts 0:9c052ff8dd6a 414 ( coderate + 4 );
Wayne Roberts 0:9c052ff8dd6a 415 double nPayload = 8 + ( ( tmp > 0 ) ? tmp : 0 );
Wayne Roberts 0:9c052ff8dd6a 416 double tPayload = nPayload * ts;
Wayne Roberts 0:9c052ff8dd6a 417 // Time on air
Wayne Roberts 0:9c052ff8dd6a 418 double tOnAir = tPreamble + tPayload;
Wayne Roberts 0:9c052ff8dd6a 419 // return ms secs
Wayne Roberts 0:9c052ff8dd6a 420 airTime = floor( tOnAir * 1e3 + 0.999 );
Wayne Roberts 0:9c052ff8dd6a 421 }
Wayne Roberts 0:9c052ff8dd6a 422 break;
Wayne Roberts 0:9c052ff8dd6a 423 }
Wayne Roberts 0:9c052ff8dd6a 424 return airTime;
Wayne Roberts 0:9c052ff8dd6a 425
Wayne Roberts 0:9c052ff8dd6a 426 }
Wayne Roberts 0:9c052ff8dd6a 427 #endif /* DUTY_ENABLE */
Wayne Roberts 0:9c052ff8dd6a 428
Wayne Roberts 0:9c052ff8dd6a 429 void Radio::service()
Wayne Roberts 0:9c052ff8dd6a 430 {
Wayne Roberts 0:9c052ff8dd6a 431 if (pinEvent.dio0) {
Wayne Roberts 0:9c052ff8dd6a 432 dio0UserContext();
Wayne Roberts 0:9c052ff8dd6a 433 pinEvent.txing = 0;
Wayne Roberts 0:9c052ff8dd6a 434 pinEvent.dio0 = 0;
Wayne Roberts 10:3303cf2867d4 435 } else if (radio.dio0.read()) {
Wayne Roberts 10:3303cf2867d4 436 /* fail: missed interrupt */
Wayne Roberts 10:3303cf2867d4 437 dio0isr();
Wayne Roberts 0:9c052ff8dd6a 438 }
Wayne Roberts 0:9c052ff8dd6a 439
Wayne Roberts 0:9c052ff8dd6a 440 if (pinEvent.dio1) {
Wayne Roberts 0:9c052ff8dd6a 441 dio1UserContext();
Wayne Roberts 0:9c052ff8dd6a 442 pinEvent.dio1 = 0;
Wayne Roberts 0:9c052ff8dd6a 443 }
Wayne Roberts 0:9c052ff8dd6a 444 }
Wayne Roberts 0:9c052ff8dd6a 445
Wayne Roberts 0:9c052ff8dd6a 446 uint32_t Radio::lora_toa_us( uint8_t pktLen )
Wayne Roberts 0:9c052ff8dd6a 447 {
Wayne Roberts 0:9c052ff8dd6a 448 uint32_t airTime = 0;
Wayne Roberts 0:9c052ff8dd6a 449 uint8_t chipBW = Radio::lora.getBw();
Wayne Roberts 0:9c052ff8dd6a 450 double bwKHz;
Wayne Roberts 0:9c052ff8dd6a 451 uint8_t LowDataRateOptimize;
Wayne Roberts 0:9c052ff8dd6a 452 bool FixLen;
Wayne Roberts 0:9c052ff8dd6a 453 uint8_t crcOn;
Wayne Roberts 0:9c052ff8dd6a 454 uint16_t preambleLen = Radio::radio.read_u16(REG_LR_PREAMBLEMSB);
Wayne Roberts 0:9c052ff8dd6a 455
Wayne Roberts 0:9c052ff8dd6a 456 Radio::lora.RegModemConfig2.octet = Radio::radio.read_reg(REG_LR_MODEMCONFIG2);
Wayne Roberts 0:9c052ff8dd6a 457 Radio::lora.RegModemConfig.octet = Radio::radio.read_reg(REG_LR_MODEMCONFIG);
Wayne Roberts 0:9c052ff8dd6a 458
Wayne Roberts 0:9c052ff8dd6a 459 if (Radio::radio.type == SX1276) {
Wayne Roberts 0:9c052ff8dd6a 460 chipBW -= 7;
Wayne Roberts 0:9c052ff8dd6a 461 Radio::lora.RegModemConfig3.octet = Radio::radio.read_reg(REG_LR_MODEMCONFIG3);
Wayne Roberts 0:9c052ff8dd6a 462 LowDataRateOptimize = Radio::lora.RegModemConfig3.sx1276bits.LowDataRateOptimize;
Wayne Roberts 0:9c052ff8dd6a 463 FixLen = Radio::lora.RegModemConfig.sx1276bits.ImplicitHeaderModeOn;
Wayne Roberts 0:9c052ff8dd6a 464 crcOn = Radio::lora.RegModemConfig2.sx1276bits.RxPayloadCrcOn;
Wayne Roberts 0:9c052ff8dd6a 465 } else if (Radio::radio.type == SX1272) {
Wayne Roberts 0:9c052ff8dd6a 466 LowDataRateOptimize = Radio::lora.RegModemConfig.sx1272bits.LowDataRateOptimize;
Wayne Roberts 0:9c052ff8dd6a 467 FixLen = Radio::lora.RegModemConfig.sx1272bits.ImplicitHeaderModeOn;
Wayne Roberts 0:9c052ff8dd6a 468 crcOn = Radio::lora.RegModemConfig.sx1272bits.RxPayloadCrcOn;
Wayne Roberts 0:9c052ff8dd6a 469 } else
Wayne Roberts 0:9c052ff8dd6a 470 return 0;
Wayne Roberts 0:9c052ff8dd6a 471
Wayne Roberts 0:9c052ff8dd6a 472 switch (chipBW) {
Wayne Roberts 0:9c052ff8dd6a 473 case 0: bwKHz = 125; break;
Wayne Roberts 0:9c052ff8dd6a 474 case 1: bwKHz = 250; break;
Wayne Roberts 0:9c052ff8dd6a 475 case 2: bwKHz = 500; break;
Wayne Roberts 0:9c052ff8dd6a 476 default: return 0;
Wayne Roberts 0:9c052ff8dd6a 477 }
Wayne Roberts 0:9c052ff8dd6a 478
Wayne Roberts 0:9c052ff8dd6a 479 // Symbol rate : time for one symbol (secs)
Wayne Roberts 0:9c052ff8dd6a 480 double rs = bwKHz / ( 1 << Radio::lora.RegModemConfig2.sx1276bits.SpreadingFactor );
Wayne Roberts 0:9c052ff8dd6a 481 double ts = 1 / rs;
Wayne Roberts 0:9c052ff8dd6a 482 // time of preamble
Wayne Roberts 0:9c052ff8dd6a 483 double tPreamble = ( preambleLen + 4.25 ) * ts;
Wayne Roberts 0:9c052ff8dd6a 484 // Symbol length of payload and time
Wayne Roberts 0:9c052ff8dd6a 485 double tmp = ceil( ( 8 * pktLen - 4 * Radio::lora.RegModemConfig2.sx1276bits.SpreadingFactor +
Wayne Roberts 0:9c052ff8dd6a 486 28 + 16 * crcOn -
Wayne Roberts 0:9c052ff8dd6a 487 ( FixLen ? 20 : 0 ) ) /
Wayne Roberts 0:9c052ff8dd6a 488 ( double )( 4 * ( Radio::lora.RegModemConfig2.sx1276bits.SpreadingFactor -
Wayne Roberts 0:9c052ff8dd6a 489 ( ( LowDataRateOptimize > 0 ) ? 2 : 0 ) ) ) ) *
Wayne Roberts 0:9c052ff8dd6a 490 ( Radio::lora.getCodingRate(false) + 4 );
Wayne Roberts 0:9c052ff8dd6a 491 double nPayload = 8 + ( ( tmp > 0 ) ? tmp : 0 );
Wayne Roberts 0:9c052ff8dd6a 492 double tPayload = nPayload * ts;
Wayne Roberts 0:9c052ff8dd6a 493 // Time on air
Wayne Roberts 0:9c052ff8dd6a 494 double tOnAir = tPreamble + tPayload;
Wayne Roberts 0:9c052ff8dd6a 495 // return microseconds
Wayne Roberts 0:9c052ff8dd6a 496 airTime = floor( tOnAir * 1000 + 0.999 );
Wayne Roberts 0:9c052ff8dd6a 497
Wayne Roberts 0:9c052ff8dd6a 498 return airTime;
Wayne Roberts 0:9c052ff8dd6a 499 }
Wayne Roberts 0:9c052ff8dd6a 500 #endif /* ..SX127x_H */
Wayne Roberts 0:9c052ff8dd6a 501