wayne roberts / sx12xx_hal

Hardware Abstraction Layer, permitting any LoRa application to use any LoRa radio chip

Dependents:   alarm_slave alarm_master lora_p2p lorawan1v1 ... more

radio chip selection

Radio chip driver is not included, allowing choice of radio device.
If you're using SX1272 or SX1276, then import sx127x driver into your program.
if you're using SX1261 or SX1262, then import sx126x driver into your program.
if you're using SX1280, then import sx1280 driver into your program.
if you're using LR1110, then import LR1110 driver into your program.
If you're using NAmote72 or Murata discovery, then you must import only sx127x driver.
If you're using Type1SJ select target DISCO_L072CZ_LRWAN1 and import sx126x driver into your program.

Pin assigned to arduino LoRa radio shield form-factor

radio_sx127x.cpp@7:ba81f66e56d1, 2018-12-05 (annotated)

Committer:
Wayne Roberts
Date:
Wed Dec 05 15:04:48 2018 -0800
Revision:
7:ba81f66e56d1
Parent:
6:b7bbf31e06e4
Child:
8:0518c6e68b79
add instataneous rssi, rx indication on sx1280

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 0:9c052ff8dd6a 117 void Radio::SetLoRaSymbolTimeout(uint8_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 0:9c052ff8dd6a 122 lora.RegModemConfig2.sx1272bits.SymbTimeoutMsb = 0;
Wayne Roberts 0:9c052ff8dd6a 123 radio.write_reg(REG_LR_MODEMCONFIG2, lora.RegModemConfig2.octet);
Wayne Roberts 0:9c052ff8dd6a 124 radio.write_reg(REG_LR_SYMBTIMEOUTLSB, symbs);
Wayne Roberts 0:9c052ff8dd6a 125 }
Wayne Roberts 0:9c052ff8dd6a 126
Wayne Roberts 0:9c052ff8dd6a 127 void Radio::LoRaModemConfig(unsigned bwKHz, uint8_t sf, uint8_t coderate)
Wayne Roberts 0:9c052ff8dd6a 128 {
Wayne Roberts 0:9c052ff8dd6a 129 float sp;
Wayne Roberts 0:9c052ff8dd6a 130 if (!radio.RegOpMode.bits.LongRangeMode)
Wayne Roberts 0:9c052ff8dd6a 131 lora.enable();
Wayne Roberts 0:9c052ff8dd6a 132
Wayne Roberts 0:9c052ff8dd6a 133 lora.RegModemConfig2.sx1276bits.SpreadingFactor = sf;
Wayne Roberts 0:9c052ff8dd6a 134 radio.write_reg(REG_LR_MODEMCONFIG2, lora.RegModemConfig2.octet);
Wayne Roberts 0:9c052ff8dd6a 135
Wayne Roberts 0:9c052ff8dd6a 136 lora.setBw_KHz(bwKHz);
Wayne Roberts 0:9c052ff8dd6a 137
Wayne Roberts 0:9c052ff8dd6a 138 if (radio.type == SX1276) {
Wayne Roberts 0:9c052ff8dd6a 139 lora.RegModemConfig.sx1276bits.CodingRate = coderate;
Wayne Roberts 0:9c052ff8dd6a 140
Wayne Roberts 0:9c052ff8dd6a 141 sp = lora.get_symbol_period();
Wayne Roberts 0:9c052ff8dd6a 142 if (sp > 16)
Wayne Roberts 0:9c052ff8dd6a 143 lora.RegModemConfig3.sx1276bits.LowDataRateOptimize = 1;
Wayne Roberts 0:9c052ff8dd6a 144 else
Wayne Roberts 0:9c052ff8dd6a 145 lora.RegModemConfig3.sx1276bits.LowDataRateOptimize = 0;
Wayne Roberts 0:9c052ff8dd6a 146
Wayne Roberts 0:9c052ff8dd6a 147 radio.write_reg(REG_LR_MODEMCONFIG3, lora.RegModemConfig3.octet);
Wayne Roberts 0:9c052ff8dd6a 148 } else if (radio.type == SX1272) {
Wayne Roberts 0:9c052ff8dd6a 149 lora.RegModemConfig.sx1272bits.CodingRate = coderate;
Wayne Roberts 0:9c052ff8dd6a 150
Wayne Roberts 0:9c052ff8dd6a 151 if (lora.get_symbol_period() > 16)
Wayne Roberts 0:9c052ff8dd6a 152 lora.RegModemConfig.sx1272bits.LowDataRateOptimize = 1;
Wayne Roberts 0:9c052ff8dd6a 153 else
Wayne Roberts 0:9c052ff8dd6a 154 lora.RegModemConfig.sx1272bits.LowDataRateOptimize = 0;
Wayne Roberts 0:9c052ff8dd6a 155 }
Wayne Roberts 0:9c052ff8dd6a 156 radio.write_reg(REG_LR_MODEMCONFIG, lora.RegModemConfig.octet);
Wayne Roberts 0:9c052ff8dd6a 157 }
Wayne Roberts 0:9c052ff8dd6a 158
Wayne Roberts 1:e79b0a55135f 159 void Radio::SetRxMaxPayloadLength(uint8_t max)
Wayne Roberts 0:9c052ff8dd6a 160 {
Wayne Roberts 1:e79b0a55135f 161 if (radio.RegOpMode.bits.LongRangeMode)
Wayne Roberts 1:e79b0a55135f 162 radio.write_reg(REG_LR_RX_MAX_PAYLOADLENGTH, max);
Wayne Roberts 1:e79b0a55135f 163 else
Wayne Roberts 1:e79b0a55135f 164 radio.write_reg(REG_FSK_PAYLOADLENGTH, max);
Wayne Roberts 0:9c052ff8dd6a 165 }
Wayne Roberts 0:9c052ff8dd6a 166
Wayne Roberts 6:b7bbf31e06e4 167 void Radio::SetFixedPayloadLength(uint8_t len)
Wayne Roberts 6:b7bbf31e06e4 168 {
Wayne Roberts 6:b7bbf31e06e4 169 lora.RegPayloadLength = len;
Wayne Roberts 6:b7bbf31e06e4 170 radio.write_reg(REG_LR_PAYLOADLENGTH, lora.RegPayloadLength);
Wayne Roberts 6:b7bbf31e06e4 171 }
Wayne Roberts 6:b7bbf31e06e4 172
Wayne Roberts 0:9c052ff8dd6a 173 const RadioEvents_t* RadioEvents;
Wayne Roberts 0:9c052ff8dd6a 174
Wayne Roberts 0:9c052ff8dd6a 175
Wayne Roberts 0:9c052ff8dd6a 176 volatile struct pe {
Wayne Roberts 0:9c052ff8dd6a 177 uint8_t dio0 : 1;
Wayne Roberts 0:9c052ff8dd6a 178 uint8_t dio1 : 1;
Wayne Roberts 0:9c052ff8dd6a 179 uint8_t txing : 1;
Wayne Roberts 0:9c052ff8dd6a 180 } pinEvent;
Wayne Roberts 0:9c052ff8dd6a 181
Wayne Roberts 0:9c052ff8dd6a 182 void
Wayne Roberts 0:9c052ff8dd6a 183 Radio::dio0UserContext()
Wayne Roberts 0:9c052ff8dd6a 184 {
Wayne Roberts 0:9c052ff8dd6a 185 service_action_e act = lora.service();
Wayne Roberts 0:9c052ff8dd6a 186
Wayne Roberts 0:9c052ff8dd6a 187 if (!pinEvent.txing) {
Wayne Roberts 0:9c052ff8dd6a 188 if (act == SERVICE_READ_FIFO && RadioEvents->RxDone) {
Wayne Roberts 0:9c052ff8dd6a 189 int8_t rssi;
Wayne Roberts 0:9c052ff8dd6a 190 float snr = lora.RegPktSnrValue / 4.0;
Wayne Roberts 0:9c052ff8dd6a 191
Wayne Roberts 0:9c052ff8dd6a 192 rssi = lora.get_pkt_rssi();
Wayne Roberts 0:9c052ff8dd6a 193 if (snr < 0)
Wayne Roberts 0:9c052ff8dd6a 194 rssi += snr;
Wayne Roberts 0:9c052ff8dd6a 195 RadioEvents->RxDone(lora.RegRxNbBytes, rssi, snr);
Wayne Roberts 0:9c052ff8dd6a 196 }
Wayne Roberts 0:9c052ff8dd6a 197 } else if (act == SERVICE_TX_DONE) {
Wayne Roberts 0:9c052ff8dd6a 198 if (RadioEvents->TxDone_botHalf)
Wayne Roberts 0:9c052ff8dd6a 199 RadioEvents->TxDone_botHalf();
Wayne Roberts 0:9c052ff8dd6a 200 }
Wayne Roberts 0:9c052ff8dd6a 201 }
Wayne Roberts 0:9c052ff8dd6a 202
Wayne Roberts 0:9c052ff8dd6a 203 volatile us_timestamp_t Radio::irqAt;
Wayne Roberts 0:9c052ff8dd6a 204
Wayne Roberts 0:9c052ff8dd6a 205 void Radio::dio0isr()
Wayne Roberts 0:9c052ff8dd6a 206 {
Wayne Roberts 0:9c052ff8dd6a 207 irqAt = lpt.read_us();
Wayne Roberts 0:9c052ff8dd6a 208
Wayne Roberts 0:9c052ff8dd6a 209 if (pinEvent.txing) {
Wayne Roberts 0:9c052ff8dd6a 210 /* TxDone handling requires low latency */
Wayne Roberts 0:9c052ff8dd6a 211 if (RadioEvents->TxDone_topHalf)
Wayne Roberts 0:9c052ff8dd6a 212 RadioEvents->TxDone_topHalf(); // TODO in callback read irqAt for timestamp of interrupt
Wayne Roberts 0:9c052ff8dd6a 213
Wayne Roberts 0:9c052ff8dd6a 214 }
Wayne Roberts 0:9c052ff8dd6a 215
Wayne Roberts 0:9c052ff8dd6a 216 pinEvent.dio0 = 1;
Wayne Roberts 0:9c052ff8dd6a 217 }
Wayne Roberts 0:9c052ff8dd6a 218
Wayne Roberts 0:9c052ff8dd6a 219 void Radio::dio1UserContext()
Wayne Roberts 0:9c052ff8dd6a 220 {
Wayne Roberts 0:9c052ff8dd6a 221 lora.RegIrqFlags.octet = radio.read_reg(REG_LR_IRQFLAGS);
Wayne Roberts 0:9c052ff8dd6a 222
Wayne Roberts 0:9c052ff8dd6a 223 if (RadioEvents->RxTimeout)
Wayne Roberts 0:9c052ff8dd6a 224 RadioEvents->RxTimeout();
Wayne Roberts 0:9c052ff8dd6a 225
Wayne Roberts 0:9c052ff8dd6a 226 radio.write_reg(REG_LR_IRQFLAGS, 0x80); // ensure RxTimeout is cleared
Wayne Roberts 0:9c052ff8dd6a 227 }
Wayne Roberts 0:9c052ff8dd6a 228
Wayne Roberts 0:9c052ff8dd6a 229 void Radio::dio1isr()
Wayne Roberts 0:9c052ff8dd6a 230 {
Wayne Roberts 0:9c052ff8dd6a 231 pinEvent.dio1 = 1;
Wayne Roberts 0:9c052ff8dd6a 232 }
Wayne Roberts 0:9c052ff8dd6a 233
Wayne Roberts 0:9c052ff8dd6a 234 void Radio::Init(const RadioEvents_t* e)
Wayne Roberts 0:9c052ff8dd6a 235 {
Wayne Roberts 0:9c052ff8dd6a 236 dio0.rise(dio0isr);
Wayne Roberts 0:9c052ff8dd6a 237 dio1.rise(dio1isr);
Wayne Roberts 0:9c052ff8dd6a 238
Wayne Roberts 0:9c052ff8dd6a 239 radio.rf_switch = rfsw_callback;
Wayne Roberts 0:9c052ff8dd6a 240 boardInit();
Wayne Roberts 0:9c052ff8dd6a 241
Wayne Roberts 0:9c052ff8dd6a 242 RadioEvents = e;
Wayne Roberts 0:9c052ff8dd6a 243 lpt.start();
Wayne Roberts 0:9c052ff8dd6a 244 }
Wayne Roberts 0:9c052ff8dd6a 245
Wayne Roberts 7:ba81f66e56d1 246 float Radio::GetRssiInst()
Wayne Roberts 7:ba81f66e56d1 247 {
Wayne Roberts 7:ba81f66e56d1 248 return lora.get_current_rssi();
Wayne Roberts 7:ba81f66e56d1 249 }
Wayne Roberts 7:ba81f66e56d1 250
Wayne Roberts 0:9c052ff8dd6a 251 int Radio::Send(uint8_t size, timestamp_t maxListenTime, timestamp_t channelFreeTime, int rssiThresh)
Wayne Roberts 0:9c052ff8dd6a 252 {
Wayne Roberts 0:9c052ff8dd6a 253 if (radio.RegOpMode.bits.Mode == RF_OPMODE_SLEEP) {
Wayne Roberts 0:9c052ff8dd6a 254 radio.set_opmode(RF_OPMODE_STANDBY);
Wayne Roberts 0:9c052ff8dd6a 255 wait_us(1000);
Wayne Roberts 0:9c052ff8dd6a 256 }
Wayne Roberts 0:9c052ff8dd6a 257 radio.write_reg(REG_LR_IRQFLAGS, 0x08); // ensure TxDone is cleared
Wayne Roberts 0:9c052ff8dd6a 258 lora.RegPayloadLength = size;
Wayne Roberts 0:9c052ff8dd6a 259 radio.write_reg(REG_LR_PAYLOADLENGTH, lora.RegPayloadLength);
Wayne Roberts 0:9c052ff8dd6a 260
Wayne Roberts 0:9c052ff8dd6a 261 if (maxListenTime > 0) {
Wayne Roberts 0:9c052ff8dd6a 262 int rssi;
Wayne Roberts 0:9c052ff8dd6a 263 us_timestamp_t startAt, chFreeAt, now;
Wayne Roberts 0:9c052ff8dd6a 264 lora.start_rx(RF_OPMODE_RECEIVER);
Wayne Roberts 0:9c052ff8dd6a 265 startAt = lpt.read_us();
Wayne Roberts 0:9c052ff8dd6a 266 Lstart:
Wayne Roberts 0:9c052ff8dd6a 267 do {
Wayne Roberts 0:9c052ff8dd6a 268 now = lpt.read_us();
Wayne Roberts 0:9c052ff8dd6a 269 if ((now - startAt) > maxListenTime) {
Wayne Roberts 0:9c052ff8dd6a 270 return -1;
Wayne Roberts 0:9c052ff8dd6a 271 }
Wayne Roberts 0:9c052ff8dd6a 272 rssi = lora.get_current_rssi();
Wayne Roberts 0:9c052ff8dd6a 273 } while (rssi > rssiThresh);
Wayne Roberts 0:9c052ff8dd6a 274 chFreeAt = lpt.read_us();
Wayne Roberts 0:9c052ff8dd6a 275 do {
Wayne Roberts 0:9c052ff8dd6a 276 now = lpt.read_us();
Wayne Roberts 0:9c052ff8dd6a 277 rssi = lora.get_current_rssi();
Wayne Roberts 0:9c052ff8dd6a 278 if (rssi > rssiThresh) {
Wayne Roberts 0:9c052ff8dd6a 279 goto Lstart;
Wayne Roberts 0:9c052ff8dd6a 280 }
Wayne Roberts 0:9c052ff8dd6a 281 } while ((now - chFreeAt) < channelFreeTime);
Wayne Roberts 0:9c052ff8dd6a 282 }
Wayne Roberts 0:9c052ff8dd6a 283
Wayne Roberts 0:9c052ff8dd6a 284 lora.start_tx(size);
Wayne Roberts 0:9c052ff8dd6a 285 pinEvent.txing = 1;
Wayne Roberts 0:9c052ff8dd6a 286
Wayne Roberts 0:9c052ff8dd6a 287 return 0;
Wayne Roberts 0:9c052ff8dd6a 288 }
Wayne Roberts 0:9c052ff8dd6a 289
Wayne Roberts 0:9c052ff8dd6a 290 void Radio::Rx(unsigned timeout)
Wayne Roberts 0:9c052ff8dd6a 291 {
Wayne Roberts 0:9c052ff8dd6a 292 if (timeout == 0) {
Wayne Roberts 0:9c052ff8dd6a 293 lora.start_rx(RF_OPMODE_RECEIVER);
Wayne Roberts 0:9c052ff8dd6a 294 } else {
Wayne Roberts 0:9c052ff8dd6a 295 lora.start_rx(RF_OPMODE_RECEIVER_SINGLE);
Wayne Roberts 0:9c052ff8dd6a 296 }
Wayne Roberts 0:9c052ff8dd6a 297
Wayne Roberts 0:9c052ff8dd6a 298 pinEvent.txing = 0;
Wayne Roberts 0:9c052ff8dd6a 299 }
Wayne Roberts 0:9c052ff8dd6a 300
Wayne Roberts 0:9c052ff8dd6a 301
Wayne Roberts 0:9c052ff8dd6a 302 void Radio::ocp(uint8_t ma)
Wayne Roberts 0:9c052ff8dd6a 303 {
Wayne Roberts 0:9c052ff8dd6a 304 if (ma < 130)
Wayne Roberts 0:9c052ff8dd6a 305 radio.RegOcp.bits.OcpTrim = (ma - 45) / 5;
Wayne Roberts 0:9c052ff8dd6a 306 else
Wayne Roberts 0:9c052ff8dd6a 307 radio.RegOcp.bits.OcpTrim = (ma + 30) / 10;
Wayne Roberts 0:9c052ff8dd6a 308 radio.write_reg(REG_OCP, radio.RegOcp.octet);
Wayne Roberts 0:9c052ff8dd6a 309
Wayne Roberts 0:9c052ff8dd6a 310 radio.RegOcp.octet = radio.read_reg(REG_OCP);
Wayne Roberts 0:9c052ff8dd6a 311 if (radio.RegOcp.bits.OcpTrim < 16)
Wayne Roberts 0:9c052ff8dd6a 312 ma = 45 + (5 * radio.RegOcp.bits.OcpTrim);
Wayne Roberts 0:9c052ff8dd6a 313 else if (radio.RegOcp.bits.OcpTrim < 28)
Wayne Roberts 0:9c052ff8dd6a 314 ma = (10 * radio.RegOcp.bits.OcpTrim) - 30;
Wayne Roberts 0:9c052ff8dd6a 315 else
Wayne Roberts 0:9c052ff8dd6a 316 ma = 240;
Wayne Roberts 0:9c052ff8dd6a 317 }
Wayne Roberts 0:9c052ff8dd6a 318
Wayne Roberts 0:9c052ff8dd6a 319
Wayne Roberts 0:9c052ff8dd6a 320 #if 0
Wayne Roberts 0:9c052ff8dd6a 321 void Radio::PrintStatus()
Wayne Roberts 0:9c052ff8dd6a 322 {
Wayne Roberts 0:9c052ff8dd6a 323 #ifdef MAC_DEBUG
Wayne Roberts 0:9c052ff8dd6a 324 radio.RegOpMode.octet = radio.read_reg(REG_OPMODE);
Wayne Roberts 0:9c052ff8dd6a 325 switch (radio.RegOpMode.bits.Mode) {
Wayne Roberts 0:9c052ff8dd6a 326 case RF_OPMODE_SLEEP: printf("SLEEP "); break;
Wayne Roberts 0:9c052ff8dd6a 327 case RF_OPMODE_STANDBY: printf("STBY "); break;
Wayne Roberts 0:9c052ff8dd6a 328 case RF_OPMODE_SYNTHESIZER_TX: printf("FSTX "); break;
Wayne Roberts 0:9c052ff8dd6a 329 case RF_OPMODE_TRANSMITTER: printf("TX "); break;
Wayne Roberts 0:9c052ff8dd6a 330 case RF_OPMODE_SYNTHESIZER_RX: printf("FSRX "); break;
Wayne Roberts 0:9c052ff8dd6a 331 case RF_OPMODE_RECEIVER: printf("RXC "); break;
Wayne Roberts 0:9c052ff8dd6a 332 case RF_OPMODE_RECEIVER_SINGLE: printf("RXS "); break;
Wayne Roberts 0:9c052ff8dd6a 333 case RF_OPMODE_CAD: printf("CAD "); break;
Wayne Roberts 0:9c052ff8dd6a 334 }
Wayne Roberts 0:9c052ff8dd6a 335
Wayne Roberts 0:9c052ff8dd6a 336 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 337 lora.RegIrqFlags.octet = radio.read_reg(REG_LR_IRQFLAGS);
Wayne Roberts 0:9c052ff8dd6a 338 printf("irqFlags:%02x\r\n", lora.RegIrqFlags.octet);
Wayne Roberts 0:9c052ff8dd6a 339 #endif /* MAC_DEBUG */
Wayne Roberts 0:9c052ff8dd6a 340 }
Wayne Roberts 0:9c052ff8dd6a 341 #endif /* if 0 */
Wayne Roberts 0:9c052ff8dd6a 342
Wayne Roberts 0:9c052ff8dd6a 343 #ifdef DUTY_ENABLE
Wayne Roberts 0:9c052ff8dd6a 344 us_timestamp_t
Wayne Roberts 0:9c052ff8dd6a 345 Radio::TimeOnAir(RadioModems_t m, uint8_t pktLen)
Wayne Roberts 0:9c052ff8dd6a 346 {
Wayne Roberts 0:9c052ff8dd6a 347 uint32_t airTime = 0;
Wayne Roberts 0:9c052ff8dd6a 348
Wayne Roberts 0:9c052ff8dd6a 349 switch (m)
Wayne Roberts 0:9c052ff8dd6a 350 {
Wayne Roberts 0:9c052ff8dd6a 351 case MODEM_FSK:
Wayne Roberts 0:9c052ff8dd6a 352 {
Wayne Roberts 0:9c052ff8dd6a 353 /* TODO
Wayne Roberts 0:9c052ff8dd6a 354 airTime = round( ( 8 * ( SX1272.Settings.Fsk.PreambleLen +
Wayne Roberts 0:9c052ff8dd6a 355 ( ( SX1272Read( REG_SYNCCONFIG ) & ~RF_SYNCCONFIG_SYNCSIZE_MASK ) + 1 ) +
Wayne Roberts 0:9c052ff8dd6a 356 ( ( SX1272.Settings.Fsk.FixLen == 0x01 ) ? 0.0 : 1.0 ) +
Wayne Roberts 0:9c052ff8dd6a 357 ( ( ( SX1272Read( REG_PACKETCONFIG1 ) & ~RF_PACKETCONFIG1_ADDRSFILTERING_MASK ) != 0x00 ) ? 1.0 : 0 ) +
Wayne Roberts 0:9c052ff8dd6a 358 pktLen +
Wayne Roberts 0:9c052ff8dd6a 359 ( ( SX1272.Settings.Fsk.CrcOn == 0x01 ) ? 2.0 : 0 ) ) /
Wayne Roberts 0:9c052ff8dd6a 360 SX1272.Settings.Fsk.Datarate ) * 1e3 );
Wayne Roberts 0:9c052ff8dd6a 361 */
Wayne Roberts 0:9c052ff8dd6a 362 }
Wayne Roberts 0:9c052ff8dd6a 363 break;
Wayne Roberts 0:9c052ff8dd6a 364 case MODEM_LORA:
Wayne Roberts 0:9c052ff8dd6a 365 {
Wayne Roberts 0:9c052ff8dd6a 366 double bw = 0.0;
Wayne Roberts 0:9c052ff8dd6a 367 uint8_t fixLen, bandwidth, LowDatarateOptimize, coderate, crcOn ;
Wayne Roberts 0:9c052ff8dd6a 368 if (radio.type == SX1276) {
Wayne Roberts 0:9c052ff8dd6a 369 coderate = lora.RegModemConfig.sx1276bits.CodingRate;
Wayne Roberts 0:9c052ff8dd6a 370 LowDatarateOptimize = lora.RegModemConfig3.sx1276bits.LowDataRateOptimize;
Wayne Roberts 0:9c052ff8dd6a 371 fixLen = lora.RegModemConfig.sx1276bits.ImplicitHeaderModeOn;
Wayne Roberts 0:9c052ff8dd6a 372 bandwidth = lora.RegModemConfig.sx1276bits.Bw - 7;
Wayne Roberts 0:9c052ff8dd6a 373 crcOn = lora.RegModemConfig2.sx1276bits.RxPayloadCrcOn;
Wayne Roberts 0:9c052ff8dd6a 374 } else if (radio.type == SX1272) {
Wayne Roberts 0:9c052ff8dd6a 375 coderate = lora.RegModemConfig.sx1272bits.CodingRate;
Wayne Roberts 0:9c052ff8dd6a 376 LowDatarateOptimize = lora.RegModemConfig.sx1272bits.LowDataRateOptimize;
Wayne Roberts 0:9c052ff8dd6a 377 fixLen = lora.RegModemConfig.sx1272bits.ImplicitHeaderModeOn;
Wayne Roberts 0:9c052ff8dd6a 378 bandwidth = lora.RegModemConfig.sx1272bits.Bw;
Wayne Roberts 0:9c052ff8dd6a 379 crcOn = lora.RegModemConfig.sx1272bits.RxPayloadCrcOn;
Wayne Roberts 0:9c052ff8dd6a 380 } else
Wayne Roberts 0:9c052ff8dd6a 381 return 0;
Wayne Roberts 0:9c052ff8dd6a 382
Wayne Roberts 0:9c052ff8dd6a 383 switch( bandwidth )
Wayne Roberts 0:9c052ff8dd6a 384 {
Wayne Roberts 0:9c052ff8dd6a 385 case 0: // 125 kHz
Wayne Roberts 0:9c052ff8dd6a 386 bw = 125;//ms: 125e3;
Wayne Roberts 0:9c052ff8dd6a 387 break;
Wayne Roberts 0:9c052ff8dd6a 388 case 1: // 250 kHz
Wayne Roberts 0:9c052ff8dd6a 389 bw = 250;//ms:250e3;
Wayne Roberts 0:9c052ff8dd6a 390 break;
Wayne Roberts 0:9c052ff8dd6a 391 case 2: // 500 kHz
Wayne Roberts 0:9c052ff8dd6a 392 bw = 500;//ms:500e3;
Wayne Roberts 0:9c052ff8dd6a 393 break;
Wayne Roberts 0:9c052ff8dd6a 394 }
Wayne Roberts 0:9c052ff8dd6a 395
Wayne Roberts 0:9c052ff8dd6a 396 // Symbol rate : time for one symbol (secs)
Wayne Roberts 0:9c052ff8dd6a 397 double rs = bw / ( 1 << lora.RegModemConfig2.sx1276bits.SpreadingFactor );
Wayne Roberts 0:9c052ff8dd6a 398 double ts = 1 / rs;
Wayne Roberts 0:9c052ff8dd6a 399 // time of preamble
Wayne Roberts 0:9c052ff8dd6a 400 double tPreamble;
Wayne Roberts 0:9c052ff8dd6a 401 tPreamble = (lora.RegPreamble + 4.25 ) * ts;
Wayne Roberts 0:9c052ff8dd6a 402 // Symbol length of payload and time
Wayne Roberts 0:9c052ff8dd6a 403 double tmp = ceil( ( 8 * pktLen - 4 * lora.RegModemConfig2.sx1276bits.SpreadingFactor +
Wayne Roberts 0:9c052ff8dd6a 404 28 + 16 * crcOn -
Wayne Roberts 0:9c052ff8dd6a 405 ( fixLen ? 20 : 0 ) ) /
Wayne Roberts 0:9c052ff8dd6a 406 ( double )( 4 * ( lora.RegModemConfig2.sx1276bits.SpreadingFactor -
Wayne Roberts 0:9c052ff8dd6a 407 ( ( LowDatarateOptimize > 0 ) ? 2 : 0 ) ) ) ) *
Wayne Roberts 0:9c052ff8dd6a 408 ( coderate + 4 );
Wayne Roberts 0:9c052ff8dd6a 409 double nPayload = 8 + ( ( tmp > 0 ) ? tmp : 0 );
Wayne Roberts 0:9c052ff8dd6a 410 double tPayload = nPayload * ts;
Wayne Roberts 0:9c052ff8dd6a 411 // Time on air
Wayne Roberts 0:9c052ff8dd6a 412 double tOnAir = tPreamble + tPayload;
Wayne Roberts 0:9c052ff8dd6a 413 // return ms secs
Wayne Roberts 0:9c052ff8dd6a 414 airTime = floor( tOnAir * 1e3 + 0.999 );
Wayne Roberts 0:9c052ff8dd6a 415 }
Wayne Roberts 0:9c052ff8dd6a 416 break;
Wayne Roberts 0:9c052ff8dd6a 417 }
Wayne Roberts 0:9c052ff8dd6a 418 return airTime;
Wayne Roberts 0:9c052ff8dd6a 419
Wayne Roberts 0:9c052ff8dd6a 420 }
Wayne Roberts 0:9c052ff8dd6a 421 #endif /* DUTY_ENABLE */
Wayne Roberts 0:9c052ff8dd6a 422
Wayne Roberts 0:9c052ff8dd6a 423 void Radio::service()
Wayne Roberts 0:9c052ff8dd6a 424 {
Wayne Roberts 0:9c052ff8dd6a 425 if (pinEvent.dio0) {
Wayne Roberts 0:9c052ff8dd6a 426 dio0UserContext();
Wayne Roberts 0:9c052ff8dd6a 427 pinEvent.txing = 0;
Wayne Roberts 0:9c052ff8dd6a 428 pinEvent.dio0 = 0;
Wayne Roberts 0:9c052ff8dd6a 429 }
Wayne Roberts 0:9c052ff8dd6a 430
Wayne Roberts 0:9c052ff8dd6a 431 if (pinEvent.dio1) {
Wayne Roberts 0:9c052ff8dd6a 432 dio1UserContext();
Wayne Roberts 0:9c052ff8dd6a 433 pinEvent.dio1 = 0;
Wayne Roberts 0:9c052ff8dd6a 434 }
Wayne Roberts 0:9c052ff8dd6a 435 }
Wayne Roberts 0:9c052ff8dd6a 436
Wayne Roberts 0:9c052ff8dd6a 437 uint32_t Radio::lora_toa_us( uint8_t pktLen )
Wayne Roberts 0:9c052ff8dd6a 438 {
Wayne Roberts 0:9c052ff8dd6a 439 uint32_t airTime = 0;
Wayne Roberts 0:9c052ff8dd6a 440 uint8_t chipBW = Radio::lora.getBw();
Wayne Roberts 0:9c052ff8dd6a 441 double bwKHz;
Wayne Roberts 0:9c052ff8dd6a 442 uint8_t LowDataRateOptimize;
Wayne Roberts 0:9c052ff8dd6a 443 bool FixLen;
Wayne Roberts 0:9c052ff8dd6a 444 uint8_t crcOn;
Wayne Roberts 0:9c052ff8dd6a 445 uint16_t preambleLen = Radio::radio.read_u16(REG_LR_PREAMBLEMSB);
Wayne Roberts 0:9c052ff8dd6a 446
Wayne Roberts 0:9c052ff8dd6a 447 Radio::lora.RegModemConfig2.octet = Radio::radio.read_reg(REG_LR_MODEMCONFIG2);
Wayne Roberts 0:9c052ff8dd6a 448 Radio::lora.RegModemConfig.octet = Radio::radio.read_reg(REG_LR_MODEMCONFIG);
Wayne Roberts 0:9c052ff8dd6a 449
Wayne Roberts 0:9c052ff8dd6a 450 if (Radio::radio.type == SX1276) {
Wayne Roberts 0:9c052ff8dd6a 451 chipBW -= 7;
Wayne Roberts 0:9c052ff8dd6a 452 Radio::lora.RegModemConfig3.octet = Radio::radio.read_reg(REG_LR_MODEMCONFIG3);
Wayne Roberts 0:9c052ff8dd6a 453 LowDataRateOptimize = Radio::lora.RegModemConfig3.sx1276bits.LowDataRateOptimize;
Wayne Roberts 0:9c052ff8dd6a 454 FixLen = Radio::lora.RegModemConfig.sx1276bits.ImplicitHeaderModeOn;
Wayne Roberts 0:9c052ff8dd6a 455 crcOn = Radio::lora.RegModemConfig2.sx1276bits.RxPayloadCrcOn;
Wayne Roberts 0:9c052ff8dd6a 456 } else if (Radio::radio.type == SX1272) {
Wayne Roberts 0:9c052ff8dd6a 457 LowDataRateOptimize = Radio::lora.RegModemConfig.sx1272bits.LowDataRateOptimize;
Wayne Roberts 0:9c052ff8dd6a 458 FixLen = Radio::lora.RegModemConfig.sx1272bits.ImplicitHeaderModeOn;
Wayne Roberts 0:9c052ff8dd6a 459 crcOn = Radio::lora.RegModemConfig.sx1272bits.RxPayloadCrcOn;
Wayne Roberts 0:9c052ff8dd6a 460 } else
Wayne Roberts 0:9c052ff8dd6a 461 return 0;
Wayne Roberts 0:9c052ff8dd6a 462
Wayne Roberts 0:9c052ff8dd6a 463 switch (chipBW) {
Wayne Roberts 0:9c052ff8dd6a 464 case 0: bwKHz = 125; break;
Wayne Roberts 0:9c052ff8dd6a 465 case 1: bwKHz = 250; break;
Wayne Roberts 0:9c052ff8dd6a 466 case 2: bwKHz = 500; break;
Wayne Roberts 0:9c052ff8dd6a 467 default: return 0;
Wayne Roberts 0:9c052ff8dd6a 468 }
Wayne Roberts 0:9c052ff8dd6a 469
Wayne Roberts 0:9c052ff8dd6a 470 // Symbol rate : time for one symbol (secs)
Wayne Roberts 0:9c052ff8dd6a 471 double rs = bwKHz / ( 1 << Radio::lora.RegModemConfig2.sx1276bits.SpreadingFactor );
Wayne Roberts 0:9c052ff8dd6a 472 double ts = 1 / rs;
Wayne Roberts 0:9c052ff8dd6a 473 // time of preamble
Wayne Roberts 0:9c052ff8dd6a 474 double tPreamble = ( preambleLen + 4.25 ) * ts;
Wayne Roberts 0:9c052ff8dd6a 475 // Symbol length of payload and time
Wayne Roberts 0:9c052ff8dd6a 476 double tmp = ceil( ( 8 * pktLen - 4 * Radio::lora.RegModemConfig2.sx1276bits.SpreadingFactor +
Wayne Roberts 0:9c052ff8dd6a 477 28 + 16 * crcOn -
Wayne Roberts 0:9c052ff8dd6a 478 ( FixLen ? 20 : 0 ) ) /
Wayne Roberts 0:9c052ff8dd6a 479 ( double )( 4 * ( Radio::lora.RegModemConfig2.sx1276bits.SpreadingFactor -
Wayne Roberts 0:9c052ff8dd6a 480 ( ( LowDataRateOptimize > 0 ) ? 2 : 0 ) ) ) ) *
Wayne Roberts 0:9c052ff8dd6a 481 ( Radio::lora.getCodingRate(false) + 4 );
Wayne Roberts 0:9c052ff8dd6a 482 double nPayload = 8 + ( ( tmp > 0 ) ? tmp : 0 );
Wayne Roberts 0:9c052ff8dd6a 483 double tPayload = nPayload * ts;
Wayne Roberts 0:9c052ff8dd6a 484 // Time on air
Wayne Roberts 0:9c052ff8dd6a 485 double tOnAir = tPreamble + tPayload;
Wayne Roberts 0:9c052ff8dd6a 486 // return microseconds
Wayne Roberts 0:9c052ff8dd6a 487 airTime = floor( tOnAir * 1000 + 0.999 );
Wayne Roberts 0:9c052ff8dd6a 488
Wayne Roberts 0:9c052ff8dd6a 489 return airTime;
Wayne Roberts 0:9c052ff8dd6a 490 }
Wayne Roberts 0:9c052ff8dd6a 491 #endif /* ..SX127x_H */
Wayne Roberts 0:9c052ff8dd6a 492