Ilya Krylov / sx12xx_hal123

1

radio_sx127x.cpp@8:0518c6e68b79, 2018-12-06 (annotated)

Committer:
Wayne Roberts
Date:
Thu Dec 06 17:57:21 2018 -0800
Revision:
8:0518c6e68b79
Parent:
7:ba81f66e56d1
Child:
10:3303cf2867d4
sx127x clear old interrupt on startup

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