Ilya Krylov / sx12xx_hal123

1

radio_sx127x.cpp@19:94b5382d3fc6, 2020-06-25 (annotated)

Committer:
Wayne Roberts
Date:
Thu Jun 25 12:39:08 2020 -0700
Revision:
19:94b5382d3fc6
Parent:
17:5f34cbe2ac53
Child:
20:75635d50262e
completed for sx127x unmodulated TX test function

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 17:5f34cbe2ac53 4 #ifdef DEVICE_LPTICKER
Wayne Roberts 0:9c052ff8dd6a 5 LowPowerTimer Radio::lpt;
Wayne Roberts 17:5f34cbe2ac53 6 LowPowerTimeout TxTimeoutEvent;
Wayne Roberts 17:5f34cbe2ac53 7 #else
Wayne Roberts 17:5f34cbe2ac53 8 Timer Radio::lpt;
Wayne Roberts 17:5f34cbe2ac53 9 Timeout TxTimeoutEvent;
Wayne Roberts 17:5f34cbe2ac53 10 #endif
Wayne Roberts 0:9c052ff8dd6a 11
Wayne Roberts 0:9c052ff8dd6a 12 void Radio::Sleep()
Wayne Roberts 0:9c052ff8dd6a 13 {
Wayne Roberts 0:9c052ff8dd6a 14 radio.set_opmode(RF_OPMODE_SLEEP);
Wayne Roberts 0:9c052ff8dd6a 15 }
Wayne Roberts 0:9c052ff8dd6a 16
Wayne Roberts 0:9c052ff8dd6a 17 void Radio::Standby()
Wayne Roberts 0:9c052ff8dd6a 18 {
Wayne Roberts 0:9c052ff8dd6a 19 radio.set_opmode(RF_OPMODE_STANDBY);
Wayne Roberts 0:9c052ff8dd6a 20 }
Wayne Roberts 0:9c052ff8dd6a 21
Wayne Roberts 0:9c052ff8dd6a 22 bool Radio::CheckRfFrequency(unsigned hz)
Wayne Roberts 0:9c052ff8dd6a 23 {
Wayne Roberts 0:9c052ff8dd6a 24 return true;
Wayne Roberts 0:9c052ff8dd6a 25 }
Wayne Roberts 0:9c052ff8dd6a 26
Wayne Roberts 0:9c052ff8dd6a 27 void Radio::SetChannel(unsigned hz)
Wayne Roberts 0:9c052ff8dd6a 28 {
Wayne Roberts 0:9c052ff8dd6a 29 radio.set_frf_MHz(hz / 1000000.0);
Wayne Roberts 0:9c052ff8dd6a 30 }
Wayne Roberts 0:9c052ff8dd6a 31
Wayne Roberts 0:9c052ff8dd6a 32 float Radio::getFrfMHz()
Wayne Roberts 0:9c052ff8dd6a 33 {
Wayne Roberts 0:9c052ff8dd6a 34 return radio.get_frf_MHz();
Wayne Roberts 0:9c052ff8dd6a 35 }
Wayne Roberts 0:9c052ff8dd6a 36
Wayne Roberts 0:9c052ff8dd6a 37 void SX1272OnTimeoutIrq( void )
Wayne Roberts 0:9c052ff8dd6a 38 {
Wayne Roberts 0:9c052ff8dd6a 39 Radio::radio.set_opmode(RF_OPMODE_STANDBY);
Wayne Roberts 0:9c052ff8dd6a 40 }
Wayne Roberts 0:9c052ff8dd6a 41
Wayne Roberts 0:9c052ff8dd6a 42 void Radio::SetTxContinuousWave(unsigned hz, int8_t dbm, unsigned timeout_us)
Wayne Roberts 0:9c052ff8dd6a 43 {
Wayne Roberts 19:94b5382d3fc6 44 fsk.enable(true);
Wayne Roberts 19:94b5382d3fc6 45 fsk.RegPktConfig2.word = radio.read_u16(REG_FSK_PACKETCONFIG2);
Wayne Roberts 19:94b5382d3fc6 46 fsk.RegPktConfig2.bits.DataModePacket = 0; // continuous mode
Wayne Roberts 19:94b5382d3fc6 47 radio.write_u16(REG_FSK_PACKETCONFIG2, fsk.RegPktConfig2.word);
Wayne Roberts 19:94b5382d3fc6 48 fsk.set_tx_fdev_hz(0); // unmodulated carrier, aka dead carrier
Wayne Roberts 19:94b5382d3fc6 49 SetChannel(hz);
Wayne Roberts 0:9c052ff8dd6a 50 set_tx_dbm(dbm);
Wayne Roberts 19:94b5382d3fc6 51
Wayne Roberts 19:94b5382d3fc6 52 if (timeout_us != 0)
Wayne Roberts 19:94b5382d3fc6 53 TxTimeoutEvent.attach_us(SX1272OnTimeoutIrq, timeout_us);
Wayne Roberts 19:94b5382d3fc6 54
Wayne Roberts 0:9c052ff8dd6a 55 radio.set_opmode(RF_OPMODE_TRANSMITTER);
Wayne Roberts 0:9c052ff8dd6a 56 }
Wayne Roberts 0:9c052ff8dd6a 57
Wayne Roberts 0:9c052ff8dd6a 58 #define LORA_MAC_PRIVATE_SYNCWORD 0x12
Wayne Roberts 0:9c052ff8dd6a 59 #define LORA_MAC_PUBLIC_SYNCWORD 0x34
Wayne Roberts 0:9c052ff8dd6a 60 void Radio::SetPublicNetwork(bool en)
Wayne Roberts 0:9c052ff8dd6a 61 {
Wayne Roberts 0:9c052ff8dd6a 62 radio.write_reg(REG_LR_SYNC_BYTE, en ? LORA_MAC_PUBLIC_SYNCWORD : LORA_MAC_PRIVATE_SYNCWORD);
Wayne Roberts 0:9c052ff8dd6a 63 }
Wayne Roberts 0:9c052ff8dd6a 64
Wayne Roberts 0:9c052ff8dd6a 65 uint32_t Radio::Random(void)
Wayne Roberts 0:9c052ff8dd6a 66 {
Wayne Roberts 0:9c052ff8dd6a 67 uint32_t ret = 0;
Wayne Roberts 0:9c052ff8dd6a 68 unsigned i;
Wayne Roberts 0:9c052ff8dd6a 69
Wayne Roberts 0:9c052ff8dd6a 70 radio.set_opmode(RF_OPMODE_RECEIVER);
Wayne Roberts 0:9c052ff8dd6a 71 for (i = 0; i < 32; i++) {
Wayne Roberts 0:9c052ff8dd6a 72 uint32_t r;
Wayne Roberts 0:9c052ff8dd6a 73 wait_us(3000);
Wayne Roberts 0:9c052ff8dd6a 74 r = radio.read_reg(REG_LR_WIDEBAND_RSSI);
Wayne Roberts 0:9c052ff8dd6a 75 r <<= ((i & 7) << 2);
Wayne Roberts 0:9c052ff8dd6a 76 ret ^= r;
Wayne Roberts 0:9c052ff8dd6a 77 }
Wayne Roberts 0:9c052ff8dd6a 78
Wayne Roberts 0:9c052ff8dd6a 79 return ret;
Wayne Roberts 0:9c052ff8dd6a 80 }
Wayne Roberts 0:9c052ff8dd6a 81
Wayne Roberts 0:9c052ff8dd6a 82 void Radio::LoRaPacketConfig(unsigned preambleLen, bool fixLen, bool crcOn, bool invIQ)
Wayne Roberts 0:9c052ff8dd6a 83 {
Wayne Roberts 0:9c052ff8dd6a 84 lora.RegPreamble = preambleLen;
Wayne Roberts 0:9c052ff8dd6a 85 radio.write_u16(REG_LR_PREAMBLEMSB, lora.RegPreamble);
Wayne Roberts 0:9c052ff8dd6a 86
Wayne Roberts 0:9c052ff8dd6a 87 if (radio.type == SX1276) {
Wayne Roberts 0:9c052ff8dd6a 88 lora.RegModemConfig.sx1276bits.ImplicitHeaderModeOn = fixLen;
Wayne Roberts 0:9c052ff8dd6a 89 lora.RegModemConfig2.sx1276bits.RxPayloadCrcOn = crcOn;
Wayne Roberts 0:9c052ff8dd6a 90 radio.write_reg(REG_LR_MODEMCONFIG2, lora.RegModemConfig2.octet);
Wayne Roberts 0:9c052ff8dd6a 91 } else if (radio.type == SX1272) {
Wayne Roberts 0:9c052ff8dd6a 92 lora.RegModemConfig.sx1272bits.ImplicitHeaderModeOn = fixLen;
Wayne Roberts 0:9c052ff8dd6a 93 lora.RegModemConfig.sx1272bits.RxPayloadCrcOn = crcOn;
Wayne Roberts 0:9c052ff8dd6a 94 }
Wayne Roberts 0:9c052ff8dd6a 95
Wayne Roberts 0:9c052ff8dd6a 96 radio.write_reg(REG_LR_MODEMCONFIG, lora.RegModemConfig.octet);
Wayne Roberts 0:9c052ff8dd6a 97
Wayne Roberts 0:9c052ff8dd6a 98 lora.invert_tx(invIQ);
Wayne Roberts 0:9c052ff8dd6a 99 lora.invert_rx(invIQ);
Wayne Roberts 0:9c052ff8dd6a 100 }
Wayne Roberts 0:9c052ff8dd6a 101
Wayne Roberts 0:9c052ff8dd6a 102 void Radio::GFSKModemConfig(unsigned bps, unsigned bw_hz, unsigned fdev_hz)
Wayne Roberts 0:9c052ff8dd6a 103 {
Wayne Roberts 0:9c052ff8dd6a 104 if (radio.RegOpMode.bits.LongRangeMode)
Wayne Roberts 0:9c052ff8dd6a 105 fsk.enable(false);
Wayne Roberts 0:9c052ff8dd6a 106
Wayne Roberts 0:9c052ff8dd6a 107 fsk.set_bitrate(bps);
Wayne Roberts 0:9c052ff8dd6a 108
Wayne Roberts 0:9c052ff8dd6a 109 fsk.set_rx_dcc_bw_hz(bw_hz, 0);
Wayne Roberts 0:9c052ff8dd6a 110 fsk.set_rx_dcc_bw_hz(bw_hz * 1.5, 1);
Wayne Roberts 0:9c052ff8dd6a 111
Wayne Roberts 0:9c052ff8dd6a 112 fsk.set_tx_fdev_hz(fdev_hz);
Wayne Roberts 0:9c052ff8dd6a 113 }
Wayne Roberts 0:9c052ff8dd6a 114
Wayne Roberts 0:9c052ff8dd6a 115
Wayne Roberts 0:9c052ff8dd6a 116 void Radio::GFSKPacketConfig(unsigned preambleLen, bool fixLen, bool crcOn)
Wayne Roberts 0:9c052ff8dd6a 117 {
Wayne Roberts 0:9c052ff8dd6a 118 if (radio.RegOpMode.bits.LongRangeMode)
Wayne Roberts 0:9c052ff8dd6a 119 fsk.enable(false);
Wayne Roberts 0:9c052ff8dd6a 120
Wayne Roberts 0:9c052ff8dd6a 121 radio.write_u16(REG_FSK_PREAMBLEMSB, preambleLen);
Wayne Roberts 0:9c052ff8dd6a 122
Wayne Roberts 0:9c052ff8dd6a 123 fsk.RegPktConfig1.bits.PacketFormatVariable = fixLen ? 0 : 1;
Wayne Roberts 0:9c052ff8dd6a 124 fsk.RegPktConfig1.bits.CrcOn = crcOn;
Wayne Roberts 0:9c052ff8dd6a 125 radio.write_reg(REG_FSK_PACKETCONFIG1, fsk.RegPktConfig1.octet);
Wayne Roberts 0:9c052ff8dd6a 126 }
Wayne Roberts 0:9c052ff8dd6a 127
Wayne Roberts 13:a354f82d12d9 128 void Radio::SetLoRaSymbolTimeout(uint16_t symbs)
Wayne Roberts 0:9c052ff8dd6a 129 {
Wayne Roberts 0:9c052ff8dd6a 130 if (!radio.RegOpMode.bits.LongRangeMode)
Wayne Roberts 0:9c052ff8dd6a 131 lora.enable();
Wayne Roberts 0:9c052ff8dd6a 132
Wayne Roberts 13:a354f82d12d9 133 radio.write_reg(REG_LR_SYMBTIMEOUTLSB, symbs & 0xff);
Wayne Roberts 13:a354f82d12d9 134 symbs >>= 8;
Wayne Roberts 13:a354f82d12d9 135 lora.RegModemConfig2.sx1272bits.SymbTimeoutMsb = symbs;
Wayne Roberts 0:9c052ff8dd6a 136 radio.write_reg(REG_LR_MODEMCONFIG2, lora.RegModemConfig2.octet);
Wayne Roberts 0:9c052ff8dd6a 137 }
Wayne Roberts 0:9c052ff8dd6a 138
Wayne Roberts 0:9c052ff8dd6a 139 void Radio::LoRaModemConfig(unsigned bwKHz, uint8_t sf, uint8_t coderate)
Wayne Roberts 0:9c052ff8dd6a 140 {
Wayne Roberts 0:9c052ff8dd6a 141 float sp;
Wayne Roberts 0:9c052ff8dd6a 142 if (!radio.RegOpMode.bits.LongRangeMode)
Wayne Roberts 0:9c052ff8dd6a 143 lora.enable();
Wayne Roberts 0:9c052ff8dd6a 144
Wayne Roberts 0:9c052ff8dd6a 145 lora.RegModemConfig2.sx1276bits.SpreadingFactor = sf;
Wayne Roberts 0:9c052ff8dd6a 146 radio.write_reg(REG_LR_MODEMCONFIG2, lora.RegModemConfig2.octet);
Wayne Roberts 0:9c052ff8dd6a 147
Wayne Roberts 0:9c052ff8dd6a 148 lora.setBw_KHz(bwKHz);
Wayne Roberts 0:9c052ff8dd6a 149
Wayne Roberts 0:9c052ff8dd6a 150 if (radio.type == SX1276) {
Wayne Roberts 0:9c052ff8dd6a 151 lora.RegModemConfig.sx1276bits.CodingRate = coderate;
Wayne Roberts 0:9c052ff8dd6a 152
Wayne Roberts 0:9c052ff8dd6a 153 sp = lora.get_symbol_period();
Wayne Roberts 0:9c052ff8dd6a 154 if (sp > 16)
Wayne Roberts 0:9c052ff8dd6a 155 lora.RegModemConfig3.sx1276bits.LowDataRateOptimize = 1;
Wayne Roberts 0:9c052ff8dd6a 156 else
Wayne Roberts 0:9c052ff8dd6a 157 lora.RegModemConfig3.sx1276bits.LowDataRateOptimize = 0;
Wayne Roberts 0:9c052ff8dd6a 158
Wayne Roberts 0:9c052ff8dd6a 159 radio.write_reg(REG_LR_MODEMCONFIG3, lora.RegModemConfig3.octet);
Wayne Roberts 0:9c052ff8dd6a 160 } else if (radio.type == SX1272) {
Wayne Roberts 0:9c052ff8dd6a 161 lora.RegModemConfig.sx1272bits.CodingRate = coderate;
Wayne Roberts 0:9c052ff8dd6a 162
Wayne Roberts 0:9c052ff8dd6a 163 if (lora.get_symbol_period() > 16)
Wayne Roberts 0:9c052ff8dd6a 164 lora.RegModemConfig.sx1272bits.LowDataRateOptimize = 1;
Wayne Roberts 0:9c052ff8dd6a 165 else
Wayne Roberts 0:9c052ff8dd6a 166 lora.RegModemConfig.sx1272bits.LowDataRateOptimize = 0;
Wayne Roberts 0:9c052ff8dd6a 167 }
Wayne Roberts 0:9c052ff8dd6a 168 radio.write_reg(REG_LR_MODEMCONFIG, lora.RegModemConfig.octet);
Wayne Roberts 0:9c052ff8dd6a 169 }
Wayne Roberts 0:9c052ff8dd6a 170
Wayne Roberts 1:e79b0a55135f 171 void Radio::SetRxMaxPayloadLength(uint8_t max)
Wayne Roberts 0:9c052ff8dd6a 172 {
Wayne Roberts 1:e79b0a55135f 173 if (radio.RegOpMode.bits.LongRangeMode)
Wayne Roberts 1:e79b0a55135f 174 radio.write_reg(REG_LR_RX_MAX_PAYLOADLENGTH, max);
Wayne Roberts 1:e79b0a55135f 175 else
Wayne Roberts 1:e79b0a55135f 176 radio.write_reg(REG_FSK_PAYLOADLENGTH, max);
Wayne Roberts 0:9c052ff8dd6a 177 }
Wayne Roberts 0:9c052ff8dd6a 178
Wayne Roberts 6:b7bbf31e06e4 179 void Radio::SetFixedPayloadLength(uint8_t len)
Wayne Roberts 6:b7bbf31e06e4 180 {
Wayne Roberts 6:b7bbf31e06e4 181 lora.RegPayloadLength = len;
Wayne Roberts 6:b7bbf31e06e4 182 radio.write_reg(REG_LR_PAYLOADLENGTH, lora.RegPayloadLength);
Wayne Roberts 6:b7bbf31e06e4 183 }
Wayne Roberts 6:b7bbf31e06e4 184
Wayne Roberts 0:9c052ff8dd6a 185 const RadioEvents_t* RadioEvents;
Wayne Roberts 0:9c052ff8dd6a 186
Wayne Roberts 0:9c052ff8dd6a 187
Wayne Roberts 0:9c052ff8dd6a 188 volatile struct pe {
Wayne Roberts 0:9c052ff8dd6a 189 uint8_t dio0 : 1;
Wayne Roberts 0:9c052ff8dd6a 190 uint8_t dio1 : 1;
Wayne Roberts 0:9c052ff8dd6a 191 uint8_t txing : 1;
Wayne Roberts 0:9c052ff8dd6a 192 } pinEvent;
Wayne Roberts 0:9c052ff8dd6a 193
Wayne Roberts 0:9c052ff8dd6a 194 void
Wayne Roberts 0:9c052ff8dd6a 195 Radio::dio0UserContext()
Wayne Roberts 0:9c052ff8dd6a 196 {
Wayne Roberts 0:9c052ff8dd6a 197 service_action_e act = lora.service();
Wayne Roberts 0:9c052ff8dd6a 198
Wayne Roberts 0:9c052ff8dd6a 199 if (!pinEvent.txing) {
Wayne Roberts 0:9c052ff8dd6a 200 if (act == SERVICE_READ_FIFO && RadioEvents->RxDone) {
Wayne Roberts 0:9c052ff8dd6a 201 int8_t rssi;
Wayne Roberts 0:9c052ff8dd6a 202 float snr = lora.RegPktSnrValue / 4.0;
Wayne Roberts 0:9c052ff8dd6a 203
Wayne Roberts 0:9c052ff8dd6a 204 rssi = lora.get_pkt_rssi();
Wayne Roberts 0:9c052ff8dd6a 205 if (snr < 0)
Wayne Roberts 0:9c052ff8dd6a 206 rssi += snr;
Wayne Roberts 0:9c052ff8dd6a 207 RadioEvents->RxDone(lora.RegRxNbBytes, rssi, snr);
Wayne Roberts 0:9c052ff8dd6a 208 }
Wayne Roberts 0:9c052ff8dd6a 209 } else if (act == SERVICE_TX_DONE) {
Wayne Roberts 0:9c052ff8dd6a 210 if (RadioEvents->TxDone_botHalf)
Wayne Roberts 0:9c052ff8dd6a 211 RadioEvents->TxDone_botHalf();
Wayne Roberts 0:9c052ff8dd6a 212 }
Wayne Roberts 0:9c052ff8dd6a 213 }
Wayne Roberts 0:9c052ff8dd6a 214
Wayne Roberts 0:9c052ff8dd6a 215 volatile us_timestamp_t Radio::irqAt;
Wayne Roberts 0:9c052ff8dd6a 216
Wayne Roberts 0:9c052ff8dd6a 217 void Radio::dio0isr()
Wayne Roberts 0:9c052ff8dd6a 218 {
Wayne Roberts 0:9c052ff8dd6a 219 irqAt = lpt.read_us();
Wayne Roberts 14:94993ae5b164 220
Wayne Roberts 14:94993ae5b164 221 if (RadioEvents->DioPin_top_half)
Wayne Roberts 14:94993ae5b164 222 RadioEvents->DioPin_top_half();
Wayne Roberts 0:9c052ff8dd6a 223
Wayne Roberts 0:9c052ff8dd6a 224 if (pinEvent.txing) {
Wayne Roberts 0:9c052ff8dd6a 225 /* TxDone handling requires low latency */
Wayne Roberts 0:9c052ff8dd6a 226 if (RadioEvents->TxDone_topHalf)
Wayne Roberts 0:9c052ff8dd6a 227 RadioEvents->TxDone_topHalf(); // TODO in callback read irqAt for timestamp of interrupt
Wayne Roberts 0:9c052ff8dd6a 228
Wayne Roberts 0:9c052ff8dd6a 229 }
Wayne Roberts 0:9c052ff8dd6a 230
Wayne Roberts 0:9c052ff8dd6a 231 pinEvent.dio0 = 1;
Wayne Roberts 0:9c052ff8dd6a 232 }
Wayne Roberts 0:9c052ff8dd6a 233
Wayne Roberts 0:9c052ff8dd6a 234 void Radio::dio1UserContext()
Wayne Roberts 0:9c052ff8dd6a 235 {
Wayne Roberts 0:9c052ff8dd6a 236 lora.RegIrqFlags.octet = radio.read_reg(REG_LR_IRQFLAGS);
Wayne Roberts 0:9c052ff8dd6a 237
Wayne Roberts 0:9c052ff8dd6a 238 if (RadioEvents->RxTimeout)
Wayne Roberts 0:9c052ff8dd6a 239 RadioEvents->RxTimeout();
Wayne Roberts 0:9c052ff8dd6a 240
Wayne Roberts 0:9c052ff8dd6a 241 radio.write_reg(REG_LR_IRQFLAGS, 0x80); // ensure RxTimeout is cleared
Wayne Roberts 0:9c052ff8dd6a 242 }
Wayne Roberts 0:9c052ff8dd6a 243
Wayne Roberts 0:9c052ff8dd6a 244 void Radio::dio1isr()
Wayne Roberts 0:9c052ff8dd6a 245 {
Wayne Roberts 0:9c052ff8dd6a 246 pinEvent.dio1 = 1;
Wayne Roberts 14:94993ae5b164 247
Wayne Roberts 14:94993ae5b164 248 if (RadioEvents->DioPin_top_half)
Wayne Roberts 14:94993ae5b164 249 RadioEvents->DioPin_top_half();
Wayne Roberts 0:9c052ff8dd6a 250 }
Wayne Roberts 0:9c052ff8dd6a 251
Wayne Roberts 13:a354f82d12d9 252 void Radio::Init(const RadioEvents_t* e, unsigned spi_hz)
Wayne Roberts 0:9c052ff8dd6a 253 {
Wayne Roberts 13:a354f82d12d9 254 radio.m_spi.frequency(spi_hz);
Wayne Roberts 13:a354f82d12d9 255
Wayne Roberts 8:0518c6e68b79 256 while (radio.dio0.read() || radio.dio1.read()) {
Wayne Roberts 8:0518c6e68b79 257 radio.write_reg(REG_LR_IRQFLAGS, 0xff); // clear stagnant interrupt
Wayne Roberts 8:0518c6e68b79 258 }
Wayne Roberts 0:9c052ff8dd6a 259 dio0.rise(dio0isr);
Wayne Roberts 0:9c052ff8dd6a 260 dio1.rise(dio1isr);
Wayne Roberts 0:9c052ff8dd6a 261
Wayne Roberts 0:9c052ff8dd6a 262 radio.rf_switch = rfsw_callback;
Wayne Roberts 0:9c052ff8dd6a 263 boardInit();
Wayne Roberts 0:9c052ff8dd6a 264
Wayne Roberts 0:9c052ff8dd6a 265 RadioEvents = e;
Wayne Roberts 0:9c052ff8dd6a 266 lpt.start();
Wayne Roberts 0:9c052ff8dd6a 267 }
Wayne Roberts 0:9c052ff8dd6a 268
Wayne Roberts 7:ba81f66e56d1 269 float Radio::GetRssiInst()
Wayne Roberts 7:ba81f66e56d1 270 {
Wayne Roberts 7:ba81f66e56d1 271 return lora.get_current_rssi();
Wayne Roberts 7:ba81f66e56d1 272 }
Wayne Roberts 7:ba81f66e56d1 273
Wayne Roberts 0:9c052ff8dd6a 274 int Radio::Send(uint8_t size, timestamp_t maxListenTime, timestamp_t channelFreeTime, int rssiThresh)
Wayne Roberts 0:9c052ff8dd6a 275 {
Wayne Roberts 0:9c052ff8dd6a 276 if (radio.RegOpMode.bits.Mode == RF_OPMODE_SLEEP) {
Wayne Roberts 0:9c052ff8dd6a 277 radio.set_opmode(RF_OPMODE_STANDBY);
Wayne Roberts 0:9c052ff8dd6a 278 wait_us(1000);
Wayne Roberts 0:9c052ff8dd6a 279 }
Wayne Roberts 0:9c052ff8dd6a 280 radio.write_reg(REG_LR_IRQFLAGS, 0x08); // ensure TxDone is cleared
Wayne Roberts 0:9c052ff8dd6a 281 lora.RegPayloadLength = size;
Wayne Roberts 0:9c052ff8dd6a 282 radio.write_reg(REG_LR_PAYLOADLENGTH, lora.RegPayloadLength);
Wayne Roberts 0:9c052ff8dd6a 283
Wayne Roberts 0:9c052ff8dd6a 284 if (maxListenTime > 0) {
Wayne Roberts 0:9c052ff8dd6a 285 int rssi;
Wayne Roberts 0:9c052ff8dd6a 286 us_timestamp_t startAt, chFreeAt, now;
Wayne Roberts 0:9c052ff8dd6a 287 lora.start_rx(RF_OPMODE_RECEIVER);
Wayne Roberts 0:9c052ff8dd6a 288 startAt = lpt.read_us();
Wayne Roberts 0:9c052ff8dd6a 289 Lstart:
Wayne Roberts 0:9c052ff8dd6a 290 do {
Wayne Roberts 0:9c052ff8dd6a 291 now = lpt.read_us();
Wayne Roberts 0:9c052ff8dd6a 292 if ((now - startAt) > maxListenTime) {
Wayne Roberts 0:9c052ff8dd6a 293 return -1;
Wayne Roberts 0:9c052ff8dd6a 294 }
Wayne Roberts 0:9c052ff8dd6a 295 rssi = lora.get_current_rssi();
Wayne Roberts 0:9c052ff8dd6a 296 } while (rssi > rssiThresh);
Wayne Roberts 0:9c052ff8dd6a 297 chFreeAt = lpt.read_us();
Wayne Roberts 0:9c052ff8dd6a 298 do {
Wayne Roberts 0:9c052ff8dd6a 299 now = lpt.read_us();
Wayne Roberts 0:9c052ff8dd6a 300 rssi = lora.get_current_rssi();
Wayne Roberts 0:9c052ff8dd6a 301 if (rssi > rssiThresh) {
Wayne Roberts 0:9c052ff8dd6a 302 goto Lstart;
Wayne Roberts 0:9c052ff8dd6a 303 }
Wayne Roberts 0:9c052ff8dd6a 304 } while ((now - chFreeAt) < channelFreeTime);
Wayne Roberts 0:9c052ff8dd6a 305 }
Wayne Roberts 0:9c052ff8dd6a 306
Wayne Roberts 0:9c052ff8dd6a 307 lora.start_tx(size);
Wayne Roberts 0:9c052ff8dd6a 308 pinEvent.txing = 1;
Wayne Roberts 0:9c052ff8dd6a 309
Wayne Roberts 0:9c052ff8dd6a 310 return 0;
Wayne Roberts 0:9c052ff8dd6a 311 }
Wayne Roberts 0:9c052ff8dd6a 312
Wayne Roberts 0:9c052ff8dd6a 313 void Radio::Rx(unsigned timeout)
Wayne Roberts 0:9c052ff8dd6a 314 {
Wayne Roberts 0:9c052ff8dd6a 315 if (timeout == 0) {
Wayne Roberts 0:9c052ff8dd6a 316 lora.start_rx(RF_OPMODE_RECEIVER);
Wayne Roberts 0:9c052ff8dd6a 317 } else {
Wayne Roberts 0:9c052ff8dd6a 318 lora.start_rx(RF_OPMODE_RECEIVER_SINGLE);
Wayne Roberts 0:9c052ff8dd6a 319 }
Wayne Roberts 0:9c052ff8dd6a 320
Wayne Roberts 0:9c052ff8dd6a 321 pinEvent.txing = 0;
Wayne Roberts 0:9c052ff8dd6a 322 }
Wayne Roberts 0:9c052ff8dd6a 323
Wayne Roberts 0:9c052ff8dd6a 324
Wayne Roberts 0:9c052ff8dd6a 325 void Radio::ocp(uint8_t ma)
Wayne Roberts 0:9c052ff8dd6a 326 {
Wayne Roberts 0:9c052ff8dd6a 327 if (ma < 130)
Wayne Roberts 0:9c052ff8dd6a 328 radio.RegOcp.bits.OcpTrim = (ma - 45) / 5;
Wayne Roberts 0:9c052ff8dd6a 329 else
Wayne Roberts 0:9c052ff8dd6a 330 radio.RegOcp.bits.OcpTrim = (ma + 30) / 10;
Wayne Roberts 0:9c052ff8dd6a 331 radio.write_reg(REG_OCP, radio.RegOcp.octet);
Wayne Roberts 0:9c052ff8dd6a 332
Wayne Roberts 0:9c052ff8dd6a 333 radio.RegOcp.octet = radio.read_reg(REG_OCP);
Wayne Roberts 0:9c052ff8dd6a 334 if (radio.RegOcp.bits.OcpTrim < 16)
Wayne Roberts 0:9c052ff8dd6a 335 ma = 45 + (5 * radio.RegOcp.bits.OcpTrim);
Wayne Roberts 0:9c052ff8dd6a 336 else if (radio.RegOcp.bits.OcpTrim < 28)
Wayne Roberts 0:9c052ff8dd6a 337 ma = (10 * radio.RegOcp.bits.OcpTrim) - 30;
Wayne Roberts 0:9c052ff8dd6a 338 else
Wayne Roberts 0:9c052ff8dd6a 339 ma = 240;
Wayne Roberts 0:9c052ff8dd6a 340 }
Wayne Roberts 0:9c052ff8dd6a 341
Wayne Roberts 0:9c052ff8dd6a 342
Wayne Roberts 0:9c052ff8dd6a 343 #if 0
Wayne Roberts 0:9c052ff8dd6a 344 void Radio::PrintStatus()
Wayne Roberts 0:9c052ff8dd6a 345 {
Wayne Roberts 0:9c052ff8dd6a 346 #ifdef MAC_DEBUG
Wayne Roberts 0:9c052ff8dd6a 347 radio.RegOpMode.octet = radio.read_reg(REG_OPMODE);
Wayne Roberts 0:9c052ff8dd6a 348 switch (radio.RegOpMode.bits.Mode) {
Wayne Roberts 0:9c052ff8dd6a 349 case RF_OPMODE_SLEEP: printf("SLEEP "); break;
Wayne Roberts 0:9c052ff8dd6a 350 case RF_OPMODE_STANDBY: printf("STBY "); break;
Wayne Roberts 0:9c052ff8dd6a 351 case RF_OPMODE_SYNTHESIZER_TX: printf("FSTX "); break;
Wayne Roberts 0:9c052ff8dd6a 352 case RF_OPMODE_TRANSMITTER: printf("TX "); break;
Wayne Roberts 0:9c052ff8dd6a 353 case RF_OPMODE_SYNTHESIZER_RX: printf("FSRX "); break;
Wayne Roberts 0:9c052ff8dd6a 354 case RF_OPMODE_RECEIVER: printf("RXC "); break;
Wayne Roberts 0:9c052ff8dd6a 355 case RF_OPMODE_RECEIVER_SINGLE: printf("RXS "); break;
Wayne Roberts 0:9c052ff8dd6a 356 case RF_OPMODE_CAD: printf("CAD "); break;
Wayne Roberts 0:9c052ff8dd6a 357 }
Wayne Roberts 0:9c052ff8dd6a 358
Wayne Roberts 0:9c052ff8dd6a 359 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 360 lora.RegIrqFlags.octet = radio.read_reg(REG_LR_IRQFLAGS);
Wayne Roberts 0:9c052ff8dd6a 361 printf("irqFlags:%02x\r\n", lora.RegIrqFlags.octet);
Wayne Roberts 0:9c052ff8dd6a 362 #endif /* MAC_DEBUG */
Wayne Roberts 0:9c052ff8dd6a 363 }
Wayne Roberts 0:9c052ff8dd6a 364 #endif /* if 0 */
Wayne Roberts 0:9c052ff8dd6a 365
Wayne Roberts 0:9c052ff8dd6a 366 #ifdef DUTY_ENABLE
Wayne Roberts 0:9c052ff8dd6a 367 us_timestamp_t
Wayne Roberts 0:9c052ff8dd6a 368 Radio::TimeOnAir(RadioModems_t m, uint8_t pktLen)
Wayne Roberts 0:9c052ff8dd6a 369 {
Wayne Roberts 0:9c052ff8dd6a 370 uint32_t airTime = 0;
Wayne Roberts 0:9c052ff8dd6a 371
Wayne Roberts 0:9c052ff8dd6a 372 switch (m)
Wayne Roberts 0:9c052ff8dd6a 373 {
Wayne Roberts 0:9c052ff8dd6a 374 case MODEM_FSK:
Wayne Roberts 0:9c052ff8dd6a 375 {
Wayne Roberts 0:9c052ff8dd6a 376 /* TODO
Wayne Roberts 0:9c052ff8dd6a 377 airTime = round( ( 8 * ( SX1272.Settings.Fsk.PreambleLen +
Wayne Roberts 0:9c052ff8dd6a 378 ( ( SX1272Read( REG_SYNCCONFIG ) & ~RF_SYNCCONFIG_SYNCSIZE_MASK ) + 1 ) +
Wayne Roberts 0:9c052ff8dd6a 379 ( ( SX1272.Settings.Fsk.FixLen == 0x01 ) ? 0.0 : 1.0 ) +
Wayne Roberts 0:9c052ff8dd6a 380 ( ( ( SX1272Read( REG_PACKETCONFIG1 ) & ~RF_PACKETCONFIG1_ADDRSFILTERING_MASK ) != 0x00 ) ? 1.0 : 0 ) +
Wayne Roberts 0:9c052ff8dd6a 381 pktLen +
Wayne Roberts 0:9c052ff8dd6a 382 ( ( SX1272.Settings.Fsk.CrcOn == 0x01 ) ? 2.0 : 0 ) ) /
Wayne Roberts 0:9c052ff8dd6a 383 SX1272.Settings.Fsk.Datarate ) * 1e3 );
Wayne Roberts 0:9c052ff8dd6a 384 */
Wayne Roberts 0:9c052ff8dd6a 385 }
Wayne Roberts 0:9c052ff8dd6a 386 break;
Wayne Roberts 0:9c052ff8dd6a 387 case MODEM_LORA:
Wayne Roberts 0:9c052ff8dd6a 388 {
Wayne Roberts 0:9c052ff8dd6a 389 double bw = 0.0;
Wayne Roberts 0:9c052ff8dd6a 390 uint8_t fixLen, bandwidth, LowDatarateOptimize, coderate, crcOn ;
Wayne Roberts 0:9c052ff8dd6a 391 if (radio.type == SX1276) {
Wayne Roberts 0:9c052ff8dd6a 392 coderate = lora.RegModemConfig.sx1276bits.CodingRate;
Wayne Roberts 0:9c052ff8dd6a 393 LowDatarateOptimize = lora.RegModemConfig3.sx1276bits.LowDataRateOptimize;
Wayne Roberts 0:9c052ff8dd6a 394 fixLen = lora.RegModemConfig.sx1276bits.ImplicitHeaderModeOn;
Wayne Roberts 0:9c052ff8dd6a 395 bandwidth = lora.RegModemConfig.sx1276bits.Bw - 7;
Wayne Roberts 0:9c052ff8dd6a 396 crcOn = lora.RegModemConfig2.sx1276bits.RxPayloadCrcOn;
Wayne Roberts 0:9c052ff8dd6a 397 } else if (radio.type == SX1272) {
Wayne Roberts 0:9c052ff8dd6a 398 coderate = lora.RegModemConfig.sx1272bits.CodingRate;
Wayne Roberts 0:9c052ff8dd6a 399 LowDatarateOptimize = lora.RegModemConfig.sx1272bits.LowDataRateOptimize;
Wayne Roberts 0:9c052ff8dd6a 400 fixLen = lora.RegModemConfig.sx1272bits.ImplicitHeaderModeOn;
Wayne Roberts 0:9c052ff8dd6a 401 bandwidth = lora.RegModemConfig.sx1272bits.Bw;
Wayne Roberts 0:9c052ff8dd6a 402 crcOn = lora.RegModemConfig.sx1272bits.RxPayloadCrcOn;
Wayne Roberts 0:9c052ff8dd6a 403 } else
Wayne Roberts 0:9c052ff8dd6a 404 return 0;
Wayne Roberts 0:9c052ff8dd6a 405
Wayne Roberts 0:9c052ff8dd6a 406 switch( bandwidth )
Wayne Roberts 0:9c052ff8dd6a 407 {
Wayne Roberts 0:9c052ff8dd6a 408 case 0: // 125 kHz
Wayne Roberts 0:9c052ff8dd6a 409 bw = 125;//ms: 125e3;
Wayne Roberts 0:9c052ff8dd6a 410 break;
Wayne Roberts 0:9c052ff8dd6a 411 case 1: // 250 kHz
Wayne Roberts 0:9c052ff8dd6a 412 bw = 250;//ms:250e3;
Wayne Roberts 0:9c052ff8dd6a 413 break;
Wayne Roberts 0:9c052ff8dd6a 414 case 2: // 500 kHz
Wayne Roberts 0:9c052ff8dd6a 415 bw = 500;//ms:500e3;
Wayne Roberts 0:9c052ff8dd6a 416 break;
Wayne Roberts 0:9c052ff8dd6a 417 }
Wayne Roberts 0:9c052ff8dd6a 418
Wayne Roberts 0:9c052ff8dd6a 419 // Symbol rate : time for one symbol (secs)
Wayne Roberts 0:9c052ff8dd6a 420 double rs = bw / ( 1 << lora.RegModemConfig2.sx1276bits.SpreadingFactor );
Wayne Roberts 0:9c052ff8dd6a 421 double ts = 1 / rs;
Wayne Roberts 0:9c052ff8dd6a 422 // time of preamble
Wayne Roberts 0:9c052ff8dd6a 423 double tPreamble;
Wayne Roberts 0:9c052ff8dd6a 424 tPreamble = (lora.RegPreamble + 4.25 ) * ts;
Wayne Roberts 0:9c052ff8dd6a 425 // Symbol length of payload and time
Wayne Roberts 0:9c052ff8dd6a 426 double tmp = ceil( ( 8 * pktLen - 4 * lora.RegModemConfig2.sx1276bits.SpreadingFactor +
Wayne Roberts 0:9c052ff8dd6a 427 28 + 16 * crcOn -
Wayne Roberts 0:9c052ff8dd6a 428 ( fixLen ? 20 : 0 ) ) /
Wayne Roberts 0:9c052ff8dd6a 429 ( double )( 4 * ( lora.RegModemConfig2.sx1276bits.SpreadingFactor -
Wayne Roberts 0:9c052ff8dd6a 430 ( ( LowDatarateOptimize > 0 ) ? 2 : 0 ) ) ) ) *
Wayne Roberts 0:9c052ff8dd6a 431 ( coderate + 4 );
Wayne Roberts 0:9c052ff8dd6a 432 double nPayload = 8 + ( ( tmp > 0 ) ? tmp : 0 );
Wayne Roberts 0:9c052ff8dd6a 433 double tPayload = nPayload * ts;
Wayne Roberts 0:9c052ff8dd6a 434 // Time on air
Wayne Roberts 0:9c052ff8dd6a 435 double tOnAir = tPreamble + tPayload;
Wayne Roberts 0:9c052ff8dd6a 436 // return ms secs
Wayne Roberts 0:9c052ff8dd6a 437 airTime = floor( tOnAir * 1e3 + 0.999 );
Wayne Roberts 0:9c052ff8dd6a 438 }
Wayne Roberts 0:9c052ff8dd6a 439 break;
Wayne Roberts 0:9c052ff8dd6a 440 }
Wayne Roberts 0:9c052ff8dd6a 441 return airTime;
Wayne Roberts 0:9c052ff8dd6a 442
Wayne Roberts 0:9c052ff8dd6a 443 }
Wayne Roberts 0:9c052ff8dd6a 444 #endif /* DUTY_ENABLE */
Wayne Roberts 0:9c052ff8dd6a 445
Wayne Roberts 0:9c052ff8dd6a 446 void Radio::service()
Wayne Roberts 0:9c052ff8dd6a 447 {
Wayne Roberts 0:9c052ff8dd6a 448 if (pinEvent.dio0) {
Wayne Roberts 17:5f34cbe2ac53 449 dio0UserContext();
Wayne Roberts 17:5f34cbe2ac53 450 pinEvent.txing = 0;
Wayne Roberts 0:9c052ff8dd6a 451 pinEvent.dio0 = 0;
Wayne Roberts 10:3303cf2867d4 452 } else if (radio.dio0.read()) {
Wayne Roberts 10:3303cf2867d4 453 /* fail: missed interrupt */
Wayne Roberts 10:3303cf2867d4 454 dio0isr();
Wayne Roberts 0:9c052ff8dd6a 455 }
Wayne Roberts 0:9c052ff8dd6a 456
Wayne Roberts 0:9c052ff8dd6a 457 if (pinEvent.dio1) {
Wayne Roberts 0:9c052ff8dd6a 458 dio1UserContext();
Wayne Roberts 0:9c052ff8dd6a 459 pinEvent.dio1 = 0;
Wayne Roberts 0:9c052ff8dd6a 460 }
Wayne Roberts 0:9c052ff8dd6a 461 }
Wayne Roberts 0:9c052ff8dd6a 462
Wayne Roberts 0:9c052ff8dd6a 463 uint32_t Radio::lora_toa_us( uint8_t pktLen )
Wayne Roberts 0:9c052ff8dd6a 464 {
Wayne Roberts 0:9c052ff8dd6a 465 uint32_t airTime = 0;
Wayne Roberts 0:9c052ff8dd6a 466 uint8_t chipBW = Radio::lora.getBw();
Wayne Roberts 0:9c052ff8dd6a 467 double bwKHz;
Wayne Roberts 0:9c052ff8dd6a 468 uint8_t LowDataRateOptimize;
Wayne Roberts 0:9c052ff8dd6a 469 bool FixLen;
Wayne Roberts 0:9c052ff8dd6a 470 uint8_t crcOn;
Wayne Roberts 0:9c052ff8dd6a 471 uint16_t preambleLen = Radio::radio.read_u16(REG_LR_PREAMBLEMSB);
Wayne Roberts 0:9c052ff8dd6a 472
Wayne Roberts 0:9c052ff8dd6a 473 Radio::lora.RegModemConfig2.octet = Radio::radio.read_reg(REG_LR_MODEMCONFIG2);
Wayne Roberts 0:9c052ff8dd6a 474 Radio::lora.RegModemConfig.octet = Radio::radio.read_reg(REG_LR_MODEMCONFIG);
Wayne Roberts 0:9c052ff8dd6a 475
Wayne Roberts 0:9c052ff8dd6a 476 if (Radio::radio.type == SX1276) {
Wayne Roberts 0:9c052ff8dd6a 477 chipBW -= 7;
Wayne Roberts 0:9c052ff8dd6a 478 Radio::lora.RegModemConfig3.octet = Radio::radio.read_reg(REG_LR_MODEMCONFIG3);
Wayne Roberts 0:9c052ff8dd6a 479 LowDataRateOptimize = Radio::lora.RegModemConfig3.sx1276bits.LowDataRateOptimize;
Wayne Roberts 0:9c052ff8dd6a 480 FixLen = Radio::lora.RegModemConfig.sx1276bits.ImplicitHeaderModeOn;
Wayne Roberts 0:9c052ff8dd6a 481 crcOn = Radio::lora.RegModemConfig2.sx1276bits.RxPayloadCrcOn;
Wayne Roberts 0:9c052ff8dd6a 482 } else if (Radio::radio.type == SX1272) {
Wayne Roberts 0:9c052ff8dd6a 483 LowDataRateOptimize = Radio::lora.RegModemConfig.sx1272bits.LowDataRateOptimize;
Wayne Roberts 0:9c052ff8dd6a 484 FixLen = Radio::lora.RegModemConfig.sx1272bits.ImplicitHeaderModeOn;
Wayne Roberts 0:9c052ff8dd6a 485 crcOn = Radio::lora.RegModemConfig.sx1272bits.RxPayloadCrcOn;
Wayne Roberts 0:9c052ff8dd6a 486 } else
Wayne Roberts 0:9c052ff8dd6a 487 return 0;
Wayne Roberts 0:9c052ff8dd6a 488
Wayne Roberts 0:9c052ff8dd6a 489 switch (chipBW) {
Wayne Roberts 0:9c052ff8dd6a 490 case 0: bwKHz = 125; break;
Wayne Roberts 0:9c052ff8dd6a 491 case 1: bwKHz = 250; break;
Wayne Roberts 0:9c052ff8dd6a 492 case 2: bwKHz = 500; break;
Wayne Roberts 0:9c052ff8dd6a 493 default: return 0;
Wayne Roberts 0:9c052ff8dd6a 494 }
Wayne Roberts 0:9c052ff8dd6a 495
Wayne Roberts 0:9c052ff8dd6a 496 // Symbol rate : time for one symbol (secs)
Wayne Roberts 0:9c052ff8dd6a 497 double rs = bwKHz / ( 1 << Radio::lora.RegModemConfig2.sx1276bits.SpreadingFactor );
Wayne Roberts 0:9c052ff8dd6a 498 double ts = 1 / rs;
Wayne Roberts 0:9c052ff8dd6a 499 // time of preamble
Wayne Roberts 0:9c052ff8dd6a 500 double tPreamble = ( preambleLen + 4.25 ) * ts;
Wayne Roberts 0:9c052ff8dd6a 501 // Symbol length of payload and time
Wayne Roberts 0:9c052ff8dd6a 502 double tmp = ceil( ( 8 * pktLen - 4 * Radio::lora.RegModemConfig2.sx1276bits.SpreadingFactor +
Wayne Roberts 0:9c052ff8dd6a 503 28 + 16 * crcOn -
Wayne Roberts 0:9c052ff8dd6a 504 ( FixLen ? 20 : 0 ) ) /
Wayne Roberts 0:9c052ff8dd6a 505 ( double )( 4 * ( Radio::lora.RegModemConfig2.sx1276bits.SpreadingFactor -
Wayne Roberts 0:9c052ff8dd6a 506 ( ( LowDataRateOptimize > 0 ) ? 2 : 0 ) ) ) ) *
Wayne Roberts 0:9c052ff8dd6a 507 ( Radio::lora.getCodingRate(false) + 4 );
Wayne Roberts 0:9c052ff8dd6a 508 double nPayload = 8 + ( ( tmp > 0 ) ? tmp : 0 );
Wayne Roberts 0:9c052ff8dd6a 509 double tPayload = nPayload * ts;
Wayne Roberts 0:9c052ff8dd6a 510 // Time on air
Wayne Roberts 0:9c052ff8dd6a 511 double tOnAir = tPreamble + tPayload;
Wayne Roberts 0:9c052ff8dd6a 512 // return microseconds
Wayne Roberts 0:9c052ff8dd6a 513 airTime = floor( tOnAir * 1000 + 0.999 );
Wayne Roberts 0:9c052ff8dd6a 514
Wayne Roberts 0:9c052ff8dd6a 515 return airTime;
Wayne Roberts 0:9c052ff8dd6a 516 }
Wayne Roberts 0:9c052ff8dd6a 517 #endif /* ..SX127x_H */
Wayne Roberts 0:9c052ff8dd6a 518