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@14:94993ae5b164, 2019-09-11 (annotated)

Committer:
Wayne Roberts
Date:
Wed Sep 11 13:20:21 2019 -0700
Revision:
14:94993ae5b164
Parent:
10:3303cf2867d4
Child:
15:e1c04ec39aa4
DioPin_top_half() added to permit scheduling a call to Radio::service()

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 14:94993ae5b164 208
Wayne Roberts 14:94993ae5b164 209 if (RadioEvents->DioPin_top_half)
Wayne Roberts 14:94993ae5b164 210 RadioEvents->DioPin_top_half();
Wayne Roberts 0:9c052ff8dd6a 211
Wayne Roberts 0:9c052ff8dd6a 212 if (pinEvent.txing) {
Wayne Roberts 0:9c052ff8dd6a 213 /* TxDone handling requires low latency */
Wayne Roberts 0:9c052ff8dd6a 214 if (RadioEvents->TxDone_topHalf)
Wayne Roberts 0:9c052ff8dd6a 215 RadioEvents->TxDone_topHalf(); // TODO in callback read irqAt for timestamp of interrupt
Wayne Roberts 0:9c052ff8dd6a 216
Wayne Roberts 0:9c052ff8dd6a 217 }
Wayne Roberts 0:9c052ff8dd6a 218
Wayne Roberts 0:9c052ff8dd6a 219 pinEvent.dio0 = 1;
Wayne Roberts 0:9c052ff8dd6a 220 }
Wayne Roberts 0:9c052ff8dd6a 221
Wayne Roberts 0:9c052ff8dd6a 222 void Radio::dio1UserContext()
Wayne Roberts 0:9c052ff8dd6a 223 {
Wayne Roberts 0:9c052ff8dd6a 224 lora.RegIrqFlags.octet = radio.read_reg(REG_LR_IRQFLAGS);
Wayne Roberts 0:9c052ff8dd6a 225
Wayne Roberts 0:9c052ff8dd6a 226 if (RadioEvents->RxTimeout)
Wayne Roberts 0:9c052ff8dd6a 227 RadioEvents->RxTimeout();
Wayne Roberts 0:9c052ff8dd6a 228
Wayne Roberts 0:9c052ff8dd6a 229 radio.write_reg(REG_LR_IRQFLAGS, 0x80); // ensure RxTimeout is cleared
Wayne Roberts 0:9c052ff8dd6a 230 }
Wayne Roberts 0:9c052ff8dd6a 231
Wayne Roberts 0:9c052ff8dd6a 232 void Radio::dio1isr()
Wayne Roberts 0:9c052ff8dd6a 233 {
Wayne Roberts 0:9c052ff8dd6a 234 pinEvent.dio1 = 1;
Wayne Roberts 14:94993ae5b164 235
Wayne Roberts 14:94993ae5b164 236 if (RadioEvents->DioPin_top_half)
Wayne Roberts 14:94993ae5b164 237 RadioEvents->DioPin_top_half();
Wayne Roberts 0:9c052ff8dd6a 238 }
Wayne Roberts 0:9c052ff8dd6a 239
Wayne Roberts 0:9c052ff8dd6a 240 void Radio::Init(const RadioEvents_t* e)
Wayne Roberts 0:9c052ff8dd6a 241 {
Wayne Roberts 8:0518c6e68b79 242 while (radio.dio0.read() || radio.dio1.read()) {
Wayne Roberts 8:0518c6e68b79 243 radio.write_reg(REG_LR_IRQFLAGS, 0xff); // clear stagnant interrupt
Wayne Roberts 8:0518c6e68b79 244 }
Wayne Roberts 0:9c052ff8dd6a 245 dio0.rise(dio0isr);
Wayne Roberts 0:9c052ff8dd6a 246 dio1.rise(dio1isr);
Wayne Roberts 0:9c052ff8dd6a 247
Wayne Roberts 0:9c052ff8dd6a 248 radio.rf_switch = rfsw_callback;
Wayne Roberts 0:9c052ff8dd6a 249 boardInit();
Wayne Roberts 0:9c052ff8dd6a 250
Wayne Roberts 0:9c052ff8dd6a 251 RadioEvents = e;
Wayne Roberts 0:9c052ff8dd6a 252 lpt.start();
Wayne Roberts 0:9c052ff8dd6a 253 }
Wayne Roberts 0:9c052ff8dd6a 254
Wayne Roberts 7:ba81f66e56d1 255 float Radio::GetRssiInst()
Wayne Roberts 7:ba81f66e56d1 256 {
Wayne Roberts 7:ba81f66e56d1 257 return lora.get_current_rssi();
Wayne Roberts 7:ba81f66e56d1 258 }
Wayne Roberts 7:ba81f66e56d1 259
Wayne Roberts 0:9c052ff8dd6a 260 int Radio::Send(uint8_t size, timestamp_t maxListenTime, timestamp_t channelFreeTime, int rssiThresh)
Wayne Roberts 0:9c052ff8dd6a 261 {
Wayne Roberts 0:9c052ff8dd6a 262 if (radio.RegOpMode.bits.Mode == RF_OPMODE_SLEEP) {
Wayne Roberts 0:9c052ff8dd6a 263 radio.set_opmode(RF_OPMODE_STANDBY);
Wayne Roberts 0:9c052ff8dd6a 264 wait_us(1000);
Wayne Roberts 0:9c052ff8dd6a 265 }
Wayne Roberts 0:9c052ff8dd6a 266 radio.write_reg(REG_LR_IRQFLAGS, 0x08); // ensure TxDone is cleared
Wayne Roberts 0:9c052ff8dd6a 267 lora.RegPayloadLength = size;
Wayne Roberts 0:9c052ff8dd6a 268 radio.write_reg(REG_LR_PAYLOADLENGTH, lora.RegPayloadLength);
Wayne Roberts 0:9c052ff8dd6a 269
Wayne Roberts 0:9c052ff8dd6a 270 if (maxListenTime > 0) {
Wayne Roberts 0:9c052ff8dd6a 271 int rssi;
Wayne Roberts 0:9c052ff8dd6a 272 us_timestamp_t startAt, chFreeAt, now;
Wayne Roberts 0:9c052ff8dd6a 273 lora.start_rx(RF_OPMODE_RECEIVER);
Wayne Roberts 0:9c052ff8dd6a 274 startAt = lpt.read_us();
Wayne Roberts 0:9c052ff8dd6a 275 Lstart:
Wayne Roberts 0:9c052ff8dd6a 276 do {
Wayne Roberts 0:9c052ff8dd6a 277 now = lpt.read_us();
Wayne Roberts 0:9c052ff8dd6a 278 if ((now - startAt) > maxListenTime) {
Wayne Roberts 0:9c052ff8dd6a 279 return -1;
Wayne Roberts 0:9c052ff8dd6a 280 }
Wayne Roberts 0:9c052ff8dd6a 281 rssi = lora.get_current_rssi();
Wayne Roberts 0:9c052ff8dd6a 282 } while (rssi > rssiThresh);
Wayne Roberts 0:9c052ff8dd6a 283 chFreeAt = lpt.read_us();
Wayne Roberts 0:9c052ff8dd6a 284 do {
Wayne Roberts 0:9c052ff8dd6a 285 now = lpt.read_us();
Wayne Roberts 0:9c052ff8dd6a 286 rssi = lora.get_current_rssi();
Wayne Roberts 0:9c052ff8dd6a 287 if (rssi > rssiThresh) {
Wayne Roberts 0:9c052ff8dd6a 288 goto Lstart;
Wayne Roberts 0:9c052ff8dd6a 289 }
Wayne Roberts 0:9c052ff8dd6a 290 } while ((now - chFreeAt) < channelFreeTime);
Wayne Roberts 0:9c052ff8dd6a 291 }
Wayne Roberts 0:9c052ff8dd6a 292
Wayne Roberts 0:9c052ff8dd6a 293 lora.start_tx(size);
Wayne Roberts 0:9c052ff8dd6a 294 pinEvent.txing = 1;
Wayne Roberts 0:9c052ff8dd6a 295
Wayne Roberts 0:9c052ff8dd6a 296 return 0;
Wayne Roberts 0:9c052ff8dd6a 297 }
Wayne Roberts 0:9c052ff8dd6a 298
Wayne Roberts 0:9c052ff8dd6a 299 void Radio::Rx(unsigned timeout)
Wayne Roberts 0:9c052ff8dd6a 300 {
Wayne Roberts 0:9c052ff8dd6a 301 if (timeout == 0) {
Wayne Roberts 0:9c052ff8dd6a 302 lora.start_rx(RF_OPMODE_RECEIVER);
Wayne Roberts 0:9c052ff8dd6a 303 } else {
Wayne Roberts 0:9c052ff8dd6a 304 lora.start_rx(RF_OPMODE_RECEIVER_SINGLE);
Wayne Roberts 0:9c052ff8dd6a 305 }
Wayne Roberts 0:9c052ff8dd6a 306
Wayne Roberts 0:9c052ff8dd6a 307 pinEvent.txing = 0;
Wayne Roberts 0:9c052ff8dd6a 308 }
Wayne Roberts 0:9c052ff8dd6a 309
Wayne Roberts 0:9c052ff8dd6a 310
Wayne Roberts 0:9c052ff8dd6a 311 void Radio::ocp(uint8_t ma)
Wayne Roberts 0:9c052ff8dd6a 312 {
Wayne Roberts 0:9c052ff8dd6a 313 if (ma < 130)
Wayne Roberts 0:9c052ff8dd6a 314 radio.RegOcp.bits.OcpTrim = (ma - 45) / 5;
Wayne Roberts 0:9c052ff8dd6a 315 else
Wayne Roberts 0:9c052ff8dd6a 316 radio.RegOcp.bits.OcpTrim = (ma + 30) / 10;
Wayne Roberts 0:9c052ff8dd6a 317 radio.write_reg(REG_OCP, radio.RegOcp.octet);
Wayne Roberts 0:9c052ff8dd6a 318
Wayne Roberts 0:9c052ff8dd6a 319 radio.RegOcp.octet = radio.read_reg(REG_OCP);
Wayne Roberts 0:9c052ff8dd6a 320 if (radio.RegOcp.bits.OcpTrim < 16)
Wayne Roberts 0:9c052ff8dd6a 321 ma = 45 + (5 * radio.RegOcp.bits.OcpTrim);
Wayne Roberts 0:9c052ff8dd6a 322 else if (radio.RegOcp.bits.OcpTrim < 28)
Wayne Roberts 0:9c052ff8dd6a 323 ma = (10 * radio.RegOcp.bits.OcpTrim) - 30;
Wayne Roberts 0:9c052ff8dd6a 324 else
Wayne Roberts 0:9c052ff8dd6a 325 ma = 240;
Wayne Roberts 0:9c052ff8dd6a 326 }
Wayne Roberts 0:9c052ff8dd6a 327
Wayne Roberts 0:9c052ff8dd6a 328
Wayne Roberts 0:9c052ff8dd6a 329 #if 0
Wayne Roberts 0:9c052ff8dd6a 330 void Radio::PrintStatus()
Wayne Roberts 0:9c052ff8dd6a 331 {
Wayne Roberts 0:9c052ff8dd6a 332 #ifdef MAC_DEBUG
Wayne Roberts 0:9c052ff8dd6a 333 radio.RegOpMode.octet = radio.read_reg(REG_OPMODE);
Wayne Roberts 0:9c052ff8dd6a 334 switch (radio.RegOpMode.bits.Mode) {
Wayne Roberts 0:9c052ff8dd6a 335 case RF_OPMODE_SLEEP: printf("SLEEP "); break;
Wayne Roberts 0:9c052ff8dd6a 336 case RF_OPMODE_STANDBY: printf("STBY "); break;
Wayne Roberts 0:9c052ff8dd6a 337 case RF_OPMODE_SYNTHESIZER_TX: printf("FSTX "); break;
Wayne Roberts 0:9c052ff8dd6a 338 case RF_OPMODE_TRANSMITTER: printf("TX "); break;
Wayne Roberts 0:9c052ff8dd6a 339 case RF_OPMODE_SYNTHESIZER_RX: printf("FSRX "); break;
Wayne Roberts 0:9c052ff8dd6a 340 case RF_OPMODE_RECEIVER: printf("RXC "); break;
Wayne Roberts 0:9c052ff8dd6a 341 case RF_OPMODE_RECEIVER_SINGLE: printf("RXS "); break;
Wayne Roberts 0:9c052ff8dd6a 342 case RF_OPMODE_CAD: printf("CAD "); break;
Wayne Roberts 0:9c052ff8dd6a 343 }
Wayne Roberts 0:9c052ff8dd6a 344
Wayne Roberts 0:9c052ff8dd6a 345 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 346 lora.RegIrqFlags.octet = radio.read_reg(REG_LR_IRQFLAGS);
Wayne Roberts 0:9c052ff8dd6a 347 printf("irqFlags:%02x\r\n", lora.RegIrqFlags.octet);
Wayne Roberts 0:9c052ff8dd6a 348 #endif /* MAC_DEBUG */
Wayne Roberts 0:9c052ff8dd6a 349 }
Wayne Roberts 0:9c052ff8dd6a 350 #endif /* if 0 */
Wayne Roberts 0:9c052ff8dd6a 351
Wayne Roberts 0:9c052ff8dd6a 352 #ifdef DUTY_ENABLE
Wayne Roberts 0:9c052ff8dd6a 353 us_timestamp_t
Wayne Roberts 0:9c052ff8dd6a 354 Radio::TimeOnAir(RadioModems_t m, uint8_t pktLen)
Wayne Roberts 0:9c052ff8dd6a 355 {
Wayne Roberts 0:9c052ff8dd6a 356 uint32_t airTime = 0;
Wayne Roberts 0:9c052ff8dd6a 357
Wayne Roberts 0:9c052ff8dd6a 358 switch (m)
Wayne Roberts 0:9c052ff8dd6a 359 {
Wayne Roberts 0:9c052ff8dd6a 360 case MODEM_FSK:
Wayne Roberts 0:9c052ff8dd6a 361 {
Wayne Roberts 0:9c052ff8dd6a 362 /* TODO
Wayne Roberts 0:9c052ff8dd6a 363 airTime = round( ( 8 * ( SX1272.Settings.Fsk.PreambleLen +
Wayne Roberts 0:9c052ff8dd6a 364 ( ( SX1272Read( REG_SYNCCONFIG ) & ~RF_SYNCCONFIG_SYNCSIZE_MASK ) + 1 ) +
Wayne Roberts 0:9c052ff8dd6a 365 ( ( SX1272.Settings.Fsk.FixLen == 0x01 ) ? 0.0 : 1.0 ) +
Wayne Roberts 0:9c052ff8dd6a 366 ( ( ( SX1272Read( REG_PACKETCONFIG1 ) & ~RF_PACKETCONFIG1_ADDRSFILTERING_MASK ) != 0x00 ) ? 1.0 : 0 ) +
Wayne Roberts 0:9c052ff8dd6a 367 pktLen +
Wayne Roberts 0:9c052ff8dd6a 368 ( ( SX1272.Settings.Fsk.CrcOn == 0x01 ) ? 2.0 : 0 ) ) /
Wayne Roberts 0:9c052ff8dd6a 369 SX1272.Settings.Fsk.Datarate ) * 1e3 );
Wayne Roberts 0:9c052ff8dd6a 370 */
Wayne Roberts 0:9c052ff8dd6a 371 }
Wayne Roberts 0:9c052ff8dd6a 372 break;
Wayne Roberts 0:9c052ff8dd6a 373 case MODEM_LORA:
Wayne Roberts 0:9c052ff8dd6a 374 {
Wayne Roberts 0:9c052ff8dd6a 375 double bw = 0.0;
Wayne Roberts 0:9c052ff8dd6a 376 uint8_t fixLen, bandwidth, LowDatarateOptimize, coderate, crcOn ;
Wayne Roberts 0:9c052ff8dd6a 377 if (radio.type == SX1276) {
Wayne Roberts 0:9c052ff8dd6a 378 coderate = lora.RegModemConfig.sx1276bits.CodingRate;
Wayne Roberts 0:9c052ff8dd6a 379 LowDatarateOptimize = lora.RegModemConfig3.sx1276bits.LowDataRateOptimize;
Wayne Roberts 0:9c052ff8dd6a 380 fixLen = lora.RegModemConfig.sx1276bits.ImplicitHeaderModeOn;
Wayne Roberts 0:9c052ff8dd6a 381 bandwidth = lora.RegModemConfig.sx1276bits.Bw - 7;
Wayne Roberts 0:9c052ff8dd6a 382 crcOn = lora.RegModemConfig2.sx1276bits.RxPayloadCrcOn;
Wayne Roberts 0:9c052ff8dd6a 383 } else if (radio.type == SX1272) {
Wayne Roberts 0:9c052ff8dd6a 384 coderate = lora.RegModemConfig.sx1272bits.CodingRate;
Wayne Roberts 0:9c052ff8dd6a 385 LowDatarateOptimize = lora.RegModemConfig.sx1272bits.LowDataRateOptimize;
Wayne Roberts 0:9c052ff8dd6a 386 fixLen = lora.RegModemConfig.sx1272bits.ImplicitHeaderModeOn;
Wayne Roberts 0:9c052ff8dd6a 387 bandwidth = lora.RegModemConfig.sx1272bits.Bw;
Wayne Roberts 0:9c052ff8dd6a 388 crcOn = lora.RegModemConfig.sx1272bits.RxPayloadCrcOn;
Wayne Roberts 0:9c052ff8dd6a 389 } else
Wayne Roberts 0:9c052ff8dd6a 390 return 0;
Wayne Roberts 0:9c052ff8dd6a 391
Wayne Roberts 0:9c052ff8dd6a 392 switch( bandwidth )
Wayne Roberts 0:9c052ff8dd6a 393 {
Wayne Roberts 0:9c052ff8dd6a 394 case 0: // 125 kHz
Wayne Roberts 0:9c052ff8dd6a 395 bw = 125;//ms: 125e3;
Wayne Roberts 0:9c052ff8dd6a 396 break;
Wayne Roberts 0:9c052ff8dd6a 397 case 1: // 250 kHz
Wayne Roberts 0:9c052ff8dd6a 398 bw = 250;//ms:250e3;
Wayne Roberts 0:9c052ff8dd6a 399 break;
Wayne Roberts 0:9c052ff8dd6a 400 case 2: // 500 kHz
Wayne Roberts 0:9c052ff8dd6a 401 bw = 500;//ms:500e3;
Wayne Roberts 0:9c052ff8dd6a 402 break;
Wayne Roberts 0:9c052ff8dd6a 403 }
Wayne Roberts 0:9c052ff8dd6a 404
Wayne Roberts 0:9c052ff8dd6a 405 // Symbol rate : time for one symbol (secs)
Wayne Roberts 0:9c052ff8dd6a 406 double rs = bw / ( 1 << lora.RegModemConfig2.sx1276bits.SpreadingFactor );
Wayne Roberts 0:9c052ff8dd6a 407 double ts = 1 / rs;
Wayne Roberts 0:9c052ff8dd6a 408 // time of preamble
Wayne Roberts 0:9c052ff8dd6a 409 double tPreamble;
Wayne Roberts 0:9c052ff8dd6a 410 tPreamble = (lora.RegPreamble + 4.25 ) * ts;
Wayne Roberts 0:9c052ff8dd6a 411 // Symbol length of payload and time
Wayne Roberts 0:9c052ff8dd6a 412 double tmp = ceil( ( 8 * pktLen - 4 * lora.RegModemConfig2.sx1276bits.SpreadingFactor +
Wayne Roberts 0:9c052ff8dd6a 413 28 + 16 * crcOn -
Wayne Roberts 0:9c052ff8dd6a 414 ( fixLen ? 20 : 0 ) ) /
Wayne Roberts 0:9c052ff8dd6a 415 ( double )( 4 * ( lora.RegModemConfig2.sx1276bits.SpreadingFactor -
Wayne Roberts 0:9c052ff8dd6a 416 ( ( LowDatarateOptimize > 0 ) ? 2 : 0 ) ) ) ) *
Wayne Roberts 0:9c052ff8dd6a 417 ( coderate + 4 );
Wayne Roberts 0:9c052ff8dd6a 418 double nPayload = 8 + ( ( tmp > 0 ) ? tmp : 0 );
Wayne Roberts 0:9c052ff8dd6a 419 double tPayload = nPayload * ts;
Wayne Roberts 0:9c052ff8dd6a 420 // Time on air
Wayne Roberts 0:9c052ff8dd6a 421 double tOnAir = tPreamble + tPayload;
Wayne Roberts 0:9c052ff8dd6a 422 // return ms secs
Wayne Roberts 0:9c052ff8dd6a 423 airTime = floor( tOnAir * 1e3 + 0.999 );
Wayne Roberts 0:9c052ff8dd6a 424 }
Wayne Roberts 0:9c052ff8dd6a 425 break;
Wayne Roberts 0:9c052ff8dd6a 426 }
Wayne Roberts 0:9c052ff8dd6a 427 return airTime;
Wayne Roberts 0:9c052ff8dd6a 428
Wayne Roberts 0:9c052ff8dd6a 429 }
Wayne Roberts 0:9c052ff8dd6a 430 #endif /* DUTY_ENABLE */
Wayne Roberts 0:9c052ff8dd6a 431
Wayne Roberts 0:9c052ff8dd6a 432 void Radio::service()
Wayne Roberts 0:9c052ff8dd6a 433 {
Wayne Roberts 0:9c052ff8dd6a 434 if (pinEvent.dio0) {
Wayne Roberts 0:9c052ff8dd6a 435 dio0UserContext();
Wayne Roberts 0:9c052ff8dd6a 436 pinEvent.txing = 0;
Wayne Roberts 0:9c052ff8dd6a 437 pinEvent.dio0 = 0;
Wayne Roberts 10:3303cf2867d4 438 } else if (radio.dio0.read()) {
Wayne Roberts 10:3303cf2867d4 439 /* fail: missed interrupt */
Wayne Roberts 10:3303cf2867d4 440 dio0isr();
Wayne Roberts 0:9c052ff8dd6a 441 }
Wayne Roberts 0:9c052ff8dd6a 442
Wayne Roberts 0:9c052ff8dd6a 443 if (pinEvent.dio1) {
Wayne Roberts 0:9c052ff8dd6a 444 dio1UserContext();
Wayne Roberts 0:9c052ff8dd6a 445 pinEvent.dio1 = 0;
Wayne Roberts 0:9c052ff8dd6a 446 }
Wayne Roberts 0:9c052ff8dd6a 447 }
Wayne Roberts 0:9c052ff8dd6a 448
Wayne Roberts 0:9c052ff8dd6a 449 uint32_t Radio::lora_toa_us( uint8_t pktLen )
Wayne Roberts 0:9c052ff8dd6a 450 {
Wayne Roberts 0:9c052ff8dd6a 451 uint32_t airTime = 0;
Wayne Roberts 0:9c052ff8dd6a 452 uint8_t chipBW = Radio::lora.getBw();
Wayne Roberts 0:9c052ff8dd6a 453 double bwKHz;
Wayne Roberts 0:9c052ff8dd6a 454 uint8_t LowDataRateOptimize;
Wayne Roberts 0:9c052ff8dd6a 455 bool FixLen;
Wayne Roberts 0:9c052ff8dd6a 456 uint8_t crcOn;
Wayne Roberts 0:9c052ff8dd6a 457 uint16_t preambleLen = Radio::radio.read_u16(REG_LR_PREAMBLEMSB);
Wayne Roberts 0:9c052ff8dd6a 458
Wayne Roberts 0:9c052ff8dd6a 459 Radio::lora.RegModemConfig2.octet = Radio::radio.read_reg(REG_LR_MODEMCONFIG2);
Wayne Roberts 0:9c052ff8dd6a 460 Radio::lora.RegModemConfig.octet = Radio::radio.read_reg(REG_LR_MODEMCONFIG);
Wayne Roberts 0:9c052ff8dd6a 461
Wayne Roberts 0:9c052ff8dd6a 462 if (Radio::radio.type == SX1276) {
Wayne Roberts 0:9c052ff8dd6a 463 chipBW -= 7;
Wayne Roberts 0:9c052ff8dd6a 464 Radio::lora.RegModemConfig3.octet = Radio::radio.read_reg(REG_LR_MODEMCONFIG3);
Wayne Roberts 0:9c052ff8dd6a 465 LowDataRateOptimize = Radio::lora.RegModemConfig3.sx1276bits.LowDataRateOptimize;
Wayne Roberts 0:9c052ff8dd6a 466 FixLen = Radio::lora.RegModemConfig.sx1276bits.ImplicitHeaderModeOn;
Wayne Roberts 0:9c052ff8dd6a 467 crcOn = Radio::lora.RegModemConfig2.sx1276bits.RxPayloadCrcOn;
Wayne Roberts 0:9c052ff8dd6a 468 } else if (Radio::radio.type == SX1272) {
Wayne Roberts 0:9c052ff8dd6a 469 LowDataRateOptimize = Radio::lora.RegModemConfig.sx1272bits.LowDataRateOptimize;
Wayne Roberts 0:9c052ff8dd6a 470 FixLen = Radio::lora.RegModemConfig.sx1272bits.ImplicitHeaderModeOn;
Wayne Roberts 0:9c052ff8dd6a 471 crcOn = Radio::lora.RegModemConfig.sx1272bits.RxPayloadCrcOn;
Wayne Roberts 0:9c052ff8dd6a 472 } else
Wayne Roberts 0:9c052ff8dd6a 473 return 0;
Wayne Roberts 0:9c052ff8dd6a 474
Wayne Roberts 0:9c052ff8dd6a 475 switch (chipBW) {
Wayne Roberts 0:9c052ff8dd6a 476 case 0: bwKHz = 125; break;
Wayne Roberts 0:9c052ff8dd6a 477 case 1: bwKHz = 250; break;
Wayne Roberts 0:9c052ff8dd6a 478 case 2: bwKHz = 500; break;
Wayne Roberts 0:9c052ff8dd6a 479 default: return 0;
Wayne Roberts 0:9c052ff8dd6a 480 }
Wayne Roberts 0:9c052ff8dd6a 481
Wayne Roberts 0:9c052ff8dd6a 482 // Symbol rate : time for one symbol (secs)
Wayne Roberts 0:9c052ff8dd6a 483 double rs = bwKHz / ( 1 << Radio::lora.RegModemConfig2.sx1276bits.SpreadingFactor );
Wayne Roberts 0:9c052ff8dd6a 484 double ts = 1 / rs;
Wayne Roberts 0:9c052ff8dd6a 485 // time of preamble
Wayne Roberts 0:9c052ff8dd6a 486 double tPreamble = ( preambleLen + 4.25 ) * ts;
Wayne Roberts 0:9c052ff8dd6a 487 // Symbol length of payload and time
Wayne Roberts 0:9c052ff8dd6a 488 double tmp = ceil( ( 8 * pktLen - 4 * Radio::lora.RegModemConfig2.sx1276bits.SpreadingFactor +
Wayne Roberts 0:9c052ff8dd6a 489 28 + 16 * crcOn -
Wayne Roberts 0:9c052ff8dd6a 490 ( FixLen ? 20 : 0 ) ) /
Wayne Roberts 0:9c052ff8dd6a 491 ( double )( 4 * ( Radio::lora.RegModemConfig2.sx1276bits.SpreadingFactor -
Wayne Roberts 0:9c052ff8dd6a 492 ( ( LowDataRateOptimize > 0 ) ? 2 : 0 ) ) ) ) *
Wayne Roberts 0:9c052ff8dd6a 493 ( Radio::lora.getCodingRate(false) + 4 );
Wayne Roberts 0:9c052ff8dd6a 494 double nPayload = 8 + ( ( tmp > 0 ) ? tmp : 0 );
Wayne Roberts 0:9c052ff8dd6a 495 double tPayload = nPayload * ts;
Wayne Roberts 0:9c052ff8dd6a 496 // Time on air
Wayne Roberts 0:9c052ff8dd6a 497 double tOnAir = tPreamble + tPayload;
Wayne Roberts 0:9c052ff8dd6a 498 // return microseconds
Wayne Roberts 0:9c052ff8dd6a 499 airTime = floor( tOnAir * 1000 + 0.999 );
Wayne Roberts 0:9c052ff8dd6a 500
Wayne Roberts 0:9c052ff8dd6a 501 return airTime;
Wayne Roberts 0:9c052ff8dd6a 502 }
Wayne Roberts 0:9c052ff8dd6a 503 #endif /* ..SX127x_H */
Wayne Roberts 0:9c052ff8dd6a 504