Ilya Krylov / SX127x

123

sx127x_lora.cpp@37:5bc5e77d71d2, 2022-06-06 (annotated)

Committer:
advxolltm
Date:
Mon Jun 06 09:26:05 2022 +0000
Revision:
37:5bc5e77d71d2
Parent:
31:b66d7a057b22 
123;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
dudmuck 2:fdae76e1215e 1 #include "sx127x_lora.h"
dudmuck 2:fdae76e1215e 2
dudmuck 2:fdae76e1215e 3 /* SX127x driver
dudmuck 2:fdae76e1215e 4 * Copyright (c) 2013 Semtech
dudmuck 2:fdae76e1215e 5 *
dudmuck 2:fdae76e1215e 6 * Licensed under the Apache License, Version 2.0 (the "License");
dudmuck 2:fdae76e1215e 7 * you may not use this file except in compliance with the License.
dudmuck 2:fdae76e1215e 8 * You may obtain a copy of the License at
dudmuck 2:fdae76e1215e 9 *
dudmuck 2:fdae76e1215e 10 * http://www.apache.org/licenses/LICENSE-2.0
dudmuck 2:fdae76e1215e 11 *
dudmuck 2:fdae76e1215e 12 * Unless required by applicable law or agreed to in writing, software
dudmuck 2:fdae76e1215e 13 * distributed under the License is distributed on an "AS IS" BASIS,
dudmuck 2:fdae76e1215e 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
dudmuck 2:fdae76e1215e 15 * See the License for the specific language governing permissions and
dudmuck 2:fdae76e1215e 16 * limitations under the License.
dudmuck 2:fdae76e1215e 17 */
dudmuck 2:fdae76e1215e 18
dudmuck 3:3bf2515b1eed 19 SX127x_lora::SX127x_lora(SX127x& r) : m_xcvr(r)
dudmuck 2:fdae76e1215e 20 {
dudmuck 19:1ee6ef1ab73f 21 if (!m_xcvr.RegOpMode.bits.LongRangeMode)
dudmuck 19:1ee6ef1ab73f 22 enable();
dudmuck 19:1ee6ef1ab73f 23
dudmuck 2:fdae76e1215e 24 RegModemConfig.octet = m_xcvr.read_reg(REG_LR_MODEMCONFIG);
dudmuck 2:fdae76e1215e 25 RegModemConfig2.octet = m_xcvr.read_reg(REG_LR_MODEMCONFIG2);
dudmuck 17:59279bc8cdab 26 RegTest33.octet = m_xcvr.read_reg(REG_LR_TEST33); // invert_i_q
dudmuck 17:59279bc8cdab 27 RegDriftInvert.octet = m_xcvr.read_reg(REG_LR_DRIFT_INVERT);
dudmuck 19:1ee6ef1ab73f 28 RegGainDrift.octet = m_xcvr.read_reg(REG_LR_GAIN_DRIFT);
dudmuck 19:1ee6ef1ab73f 29
dudmuck 19:1ee6ef1ab73f 30 if (m_xcvr.type == SX1276) {
dudmuck 19:1ee6ef1ab73f 31 RegAutoDrift.octet = m_xcvr.read_reg(REG_LR_SX1276_AUTO_DRIFT);
dudmuck 19:1ee6ef1ab73f 32 }
dudmuck 27:da6341d9d5b1 33
dudmuck 27:da6341d9d5b1 34
dudmuck 2:fdae76e1215e 35 }
dudmuck 2:fdae76e1215e 36
dudmuck 2:fdae76e1215e 37 SX127x_lora::~SX127x_lora()
dudmuck 2:fdae76e1215e 38 {
dudmuck 2:fdae76e1215e 39 }
dudmuck 2:fdae76e1215e 40
dudmuck 2:fdae76e1215e 41 void SX127x_lora::write_fifo(uint8_t len)
dudmuck 2:fdae76e1215e 42 {
dudmuck 2:fdae76e1215e 43 int i;
dudmuck 2:fdae76e1215e 44
dudmuck 2:fdae76e1215e 45 m_xcvr.m_cs = 0;
dudmuck 2:fdae76e1215e 46 m_xcvr.m_spi.write(REG_FIFO | 0x80); // bit7 is high for writing to radio
dudmuck 2:fdae76e1215e 47
dudmuck 2:fdae76e1215e 48 for (i = 0; i < len; i++) {
dudmuck 2:fdae76e1215e 49 m_xcvr.m_spi.write(m_xcvr.tx_buf[i]);
dudmuck 2:fdae76e1215e 50 }
dudmuck 2:fdae76e1215e 51 m_xcvr.m_cs = 1;
dudmuck 2:fdae76e1215e 52 }
dudmuck 2:fdae76e1215e 53
dudmuck 2:fdae76e1215e 54 void SX127x_lora::read_fifo(uint8_t len)
dudmuck 2:fdae76e1215e 55 {
dudmuck 2:fdae76e1215e 56 int i;
dudmuck 2:fdae76e1215e 57
dudmuck 2:fdae76e1215e 58 m_xcvr.m_cs = 0;
dudmuck 2:fdae76e1215e 59 m_xcvr.m_spi.write(REG_FIFO); // bit7 is low for reading from radio
dudmuck 2:fdae76e1215e 60 for (i = 0; i < len; i++) {
dudmuck 2:fdae76e1215e 61 m_xcvr.rx_buf[i] = m_xcvr.m_spi.write(0);
dudmuck 2:fdae76e1215e 62 }
dudmuck 2:fdae76e1215e 63 m_xcvr.m_cs = 1;
dudmuck 2:fdae76e1215e 64 }
dudmuck 2:fdae76e1215e 65
dudmuck 2:fdae76e1215e 66 void SX127x_lora::enable()
dudmuck 2:fdae76e1215e 67 {
dudmuck 2:fdae76e1215e 68 m_xcvr.set_opmode(RF_OPMODE_SLEEP);
dudmuck 2:fdae76e1215e 69
dudmuck 2:fdae76e1215e 70 m_xcvr.RegOpMode.bits.LongRangeMode = 1;
dudmuck 2:fdae76e1215e 71 m_xcvr.write_reg(REG_OPMODE, m_xcvr.RegOpMode.octet);
dudmuck 2:fdae76e1215e 72
dudmuck 2:fdae76e1215e 73 m_xcvr.RegDioMapping1.bits.Dio0Mapping = 0; // DIO0 to RxDone
dudmuck 2:fdae76e1215e 74 m_xcvr.RegDioMapping1.bits.Dio1Mapping = 0;
dudmuck 2:fdae76e1215e 75 m_xcvr.write_reg(REG_DIOMAPPING1, m_xcvr.RegDioMapping1.octet);
dudmuck 27:da6341d9d5b1 76
dudmuck 27:da6341d9d5b1 77 RegTest31.octet = m_xcvr.read_reg(REG_LR_TEST31);
dudmuck 27:da6341d9d5b1 78 RegTest31.bits.if_freq_auto = 0; // improved RX spurious rejection
dudmuck 27:da6341d9d5b1 79 m_xcvr.write_reg(REG_LR_TEST31, RegTest31.octet);
dudmuck 2:fdae76e1215e 80
dudmuck 2:fdae76e1215e 81 m_xcvr.set_opmode(RF_OPMODE_STANDBY);
dudmuck 2:fdae76e1215e 82 }
dudmuck 2:fdae76e1215e 83
dudmuck 2:fdae76e1215e 84 uint8_t SX127x_lora::getCodingRate(bool from_rx)
dudmuck 2:fdae76e1215e 85 {
dudmuck 2:fdae76e1215e 86 if (from_rx) {
dudmuck 2:fdae76e1215e 87 // expected RegModemStatus was read on RxDone interrupt
dudmuck 2:fdae76e1215e 88 return RegModemStatus.bits.RxCodingRate;
dudmuck 2:fdae76e1215e 89 } else { // transmitted coding rate...
dudmuck 2:fdae76e1215e 90 if (m_xcvr.type == SX1276)
dudmuck 2:fdae76e1215e 91 return RegModemConfig.sx1276bits.CodingRate;
dudmuck 2:fdae76e1215e 92 else if (m_xcvr.type == SX1272)
dudmuck 2:fdae76e1215e 93 return RegModemConfig.sx1272bits.CodingRate;
dudmuck 2:fdae76e1215e 94 else
dudmuck 2:fdae76e1215e 95 return 0;
dudmuck 2:fdae76e1215e 96 }
dudmuck 2:fdae76e1215e 97 }
dudmuck 2:fdae76e1215e 98
dudmuck 2:fdae76e1215e 99
dudmuck 2:fdae76e1215e 100
dudmuck 2:fdae76e1215e 101 void SX127x_lora::setCodingRate(uint8_t cr)
dudmuck 2:fdae76e1215e 102 {
dudmuck 2:fdae76e1215e 103 if (!m_xcvr.RegOpMode.bits.LongRangeMode)
dudmuck 2:fdae76e1215e 104 return;
dudmuck 2:fdae76e1215e 105
dudmuck 2:fdae76e1215e 106 if (m_xcvr.type == SX1276)
dudmuck 2:fdae76e1215e 107 RegModemConfig.sx1276bits.CodingRate = cr;
dudmuck 2:fdae76e1215e 108 else if (m_xcvr.type == SX1272)
dudmuck 2:fdae76e1215e 109 RegModemConfig.sx1272bits.CodingRate = cr;
dudmuck 2:fdae76e1215e 110 else
dudmuck 2:fdae76e1215e 111 return;
dudmuck 2:fdae76e1215e 112
dudmuck 2:fdae76e1215e 113 m_xcvr.write_reg(REG_LR_MODEMCONFIG, RegModemConfig.octet);
dudmuck 2:fdae76e1215e 114 }
dudmuck 2:fdae76e1215e 115
dudmuck 2:fdae76e1215e 116
dudmuck 2:fdae76e1215e 117
dudmuck 2:fdae76e1215e 118 bool SX127x_lora::getHeaderMode(void)
dudmuck 2:fdae76e1215e 119 {
dudmuck 26:4876e515ff4c 120 if (m_xcvr.type == SX1276) {
dudmuck 26:4876e515ff4c 121 RegModemConfig.octet = m_xcvr.read_reg(REG_LR_MODEMCONFIG);
dudmuck 2:fdae76e1215e 122 return RegModemConfig.sx1276bits.ImplicitHeaderModeOn;
dudmuck 26:4876e515ff4c 123 } else if (m_xcvr.type == SX1272) {
dudmuck 26:4876e515ff4c 124 RegModemConfig.octet = m_xcvr.read_reg(REG_LR_MODEMCONFIG);
dudmuck 2:fdae76e1215e 125 return RegModemConfig.sx1272bits.ImplicitHeaderModeOn;
dudmuck 26:4876e515ff4c 126 } else
dudmuck 2:fdae76e1215e 127 return false;
dudmuck 2:fdae76e1215e 128 }
dudmuck 2:fdae76e1215e 129
dudmuck 2:fdae76e1215e 130 void SX127x_lora::setHeaderMode(bool hm)
dudmuck 2:fdae76e1215e 131 {
dudmuck 2:fdae76e1215e 132 if (m_xcvr.type == SX1276)
dudmuck 2:fdae76e1215e 133 RegModemConfig.sx1276bits.ImplicitHeaderModeOn = hm;
dudmuck 2:fdae76e1215e 134 else if (m_xcvr.type == SX1272)
dudmuck 2:fdae76e1215e 135 RegModemConfig.sx1272bits.ImplicitHeaderModeOn = hm;
dudmuck 2:fdae76e1215e 136 else
dudmuck 2:fdae76e1215e 137 return;
dudmuck 2:fdae76e1215e 138
dudmuck 2:fdae76e1215e 139 m_xcvr.write_reg(REG_LR_MODEMCONFIG, RegModemConfig.octet);
dudmuck 2:fdae76e1215e 140 }
dudmuck 2:fdae76e1215e 141
dudmuck 2:fdae76e1215e 142
dudmuck 2:fdae76e1215e 143 uint8_t SX127x_lora::getBw(void)
dudmuck 2:fdae76e1215e 144 {
dudmuck 2:fdae76e1215e 145 if (m_xcvr.type == SX1276)
dudmuck 2:fdae76e1215e 146 return RegModemConfig.sx1276bits.Bw;
dudmuck 2:fdae76e1215e 147 else if (m_xcvr.type == SX1272)
dudmuck 2:fdae76e1215e 148 return RegModemConfig.sx1272bits.Bw;
dudmuck 2:fdae76e1215e 149 else
dudmuck 2:fdae76e1215e 150 return 0;
dudmuck 2:fdae76e1215e 151 }
dudmuck 15:3f3fc6792f97 152
dudmuck 15:3f3fc6792f97 153 int SX127x_lora::get_freq_error_Hz()
dudmuck 15:3f3fc6792f97 154 {
dudmuck 15:3f3fc6792f97 155 int freq_error;
dudmuck 15:3f3fc6792f97 156 float f, khz = 0;
dudmuck 15:3f3fc6792f97 157 freq_error = m_xcvr.read_reg(REG_LR_TEST28);
dudmuck 15:3f3fc6792f97 158 freq_error <<= 8;
dudmuck 15:3f3fc6792f97 159 freq_error += m_xcvr.read_reg(REG_LR_TEST29);
dudmuck 15:3f3fc6792f97 160 freq_error <<= 8;
dudmuck 15:3f3fc6792f97 161 freq_error += m_xcvr.read_reg(REG_LR_TEST2A);
dudmuck 15:3f3fc6792f97 162 if (freq_error & 0x80000) { // 20bit value is negative
dudmuck 15:3f3fc6792f97 163 //signed 20bit to 32bit
dudmuck 15:3f3fc6792f97 164 freq_error |= 0xfff00000;
dudmuck 15:3f3fc6792f97 165 }
dudmuck 15:3f3fc6792f97 166 f = freq_error / (float)XTAL_FREQ;
dudmuck 15:3f3fc6792f97 167 f *= (float)0x1000000; // 2^24
dudmuck 15:3f3fc6792f97 168 if (m_xcvr.type == SX1272) {
dudmuck 15:3f3fc6792f97 169 switch (RegModemConfig.sx1272bits.Bw) {
dudmuck 15:3f3fc6792f97 170 case 0: khz = 125; break;
dudmuck 15:3f3fc6792f97 171 case 1: khz = 250; break;
dudmuck 15:3f3fc6792f97 172 case 2: khz = 500; break;
dudmuck 15:3f3fc6792f97 173 }
dudmuck 15:3f3fc6792f97 174 } else if (m_xcvr.type == SX1276) {
dudmuck 15:3f3fc6792f97 175 switch (RegModemConfig.sx1276bits.Bw) {
dudmuck 15:3f3fc6792f97 176 case 0: khz = 7.8; break;
dudmuck 15:3f3fc6792f97 177 case 1: khz = 10.4; break;
dudmuck 15:3f3fc6792f97 178 case 2: khz = 15.6; break;
dudmuck 15:3f3fc6792f97 179 case 3: khz = 20.8; break;
dudmuck 15:3f3fc6792f97 180 case 4: khz = 31.25; break;
dudmuck 15:3f3fc6792f97 181 case 5: khz = 41.7; break;
dudmuck 15:3f3fc6792f97 182 case 6: khz = 62.5; break;
dudmuck 15:3f3fc6792f97 183 case 7: khz = 125; break;
dudmuck 15:3f3fc6792f97 184 case 8: khz = 250; break;
dudmuck 15:3f3fc6792f97 185 case 9: khz = 500; break;
dudmuck 15:3f3fc6792f97 186 }
dudmuck 15:3f3fc6792f97 187 }
dudmuck 15:3f3fc6792f97 188 f *= khz / 500;
dudmuck 15:3f3fc6792f97 189 return (int)f;
dudmuck 15:3f3fc6792f97 190 }
dudmuck 15:3f3fc6792f97 191
dudmuck 10:7382c260c4b1 192 float SX127x_lora::get_symbol_period()
dudmuck 10:7382c260c4b1 193 {
dudmuck 10:7382c260c4b1 194 float khz = 0;
dudmuck 10:7382c260c4b1 195
dudmuck 10:7382c260c4b1 196 if (m_xcvr.type == SX1276) {
dudmuck 10:7382c260c4b1 197 switch (RegModemConfig.sx1276bits.Bw) {
dudmuck 10:7382c260c4b1 198 case 0: khz = 7.8; break;
dudmuck 10:7382c260c4b1 199 case 1: khz = 10.4; break;
dudmuck 10:7382c260c4b1 200 case 2: khz = 15.6; break;
dudmuck 10:7382c260c4b1 201 case 3: khz = 20.8; break;
dudmuck 10:7382c260c4b1 202 case 4: khz = 31.25; break;
dudmuck 10:7382c260c4b1 203 case 5: khz = 41.7; break;
dudmuck 10:7382c260c4b1 204 case 6: khz = 62.5; break;
dudmuck 10:7382c260c4b1 205 case 7: khz = 125; break;
dudmuck 10:7382c260c4b1 206 case 8: khz = 250; break;
dudmuck 10:7382c260c4b1 207 case 9: khz = 500; break;
dudmuck 10:7382c260c4b1 208 }
dudmuck 10:7382c260c4b1 209 } else if (m_xcvr.type == SX1272) {
dudmuck 10:7382c260c4b1 210 switch (RegModemConfig.sx1272bits.Bw) {
dudmuck 10:7382c260c4b1 211 case 0: khz = 125; break;
dudmuck 10:7382c260c4b1 212 case 1: khz = 250; break;
dudmuck 10:7382c260c4b1 213 case 2: khz = 500; break;
dudmuck 10:7382c260c4b1 214 }
dudmuck 10:7382c260c4b1 215 }
dudmuck 10:7382c260c4b1 216
dudmuck 10:7382c260c4b1 217 // return symbol duration in milliseconds
dudmuck 10:7382c260c4b1 218 return (1 << RegModemConfig2.sx1276bits.SpreadingFactor) / khz;
dudmuck 10:7382c260c4b1 219 }
dudmuck 2:fdae76e1215e 220
dudmuck 16:3de8e1c465eb 221 void SX127x_lora::setBw_KHz(int khz)
dudmuck 16:3de8e1c465eb 222 {
dudmuck 16:3de8e1c465eb 223 uint8_t bw = 0;
dudmuck 16:3de8e1c465eb 224
dudmuck 16:3de8e1c465eb 225 if (m_xcvr.type == SX1276) {
dudmuck 16:3de8e1c465eb 226 if (khz <= 8) bw = 0;
dudmuck 16:3de8e1c465eb 227 else if (khz <= 11) bw = 1;
dudmuck 16:3de8e1c465eb 228 else if (khz <= 16) bw = 2;
dudmuck 16:3de8e1c465eb 229 else if (khz <= 21) bw = 3;
dudmuck 16:3de8e1c465eb 230 else if (khz <= 32) bw = 4;
dudmuck 16:3de8e1c465eb 231 else if (khz <= 42) bw = 5;
dudmuck 16:3de8e1c465eb 232 else if (khz <= 63) bw = 6;
dudmuck 16:3de8e1c465eb 233 else if (khz <= 125) bw = 7;
dudmuck 16:3de8e1c465eb 234 else if (khz <= 250) bw = 8;
dudmuck 16:3de8e1c465eb 235 else if (khz <= 500) bw = 9;
dudmuck 16:3de8e1c465eb 236 } else if (m_xcvr.type == SX1272) {
dudmuck 16:3de8e1c465eb 237 if (khz <= 125) bw = 0;
dudmuck 16:3de8e1c465eb 238 else if (khz <= 250) bw = 1;
dudmuck 16:3de8e1c465eb 239 else if (khz <= 500) bw = 2;
dudmuck 16:3de8e1c465eb 240 }
dudmuck 16:3de8e1c465eb 241
dudmuck 16:3de8e1c465eb 242 setBw(bw);
dudmuck 16:3de8e1c465eb 243 }
dudmuck 16:3de8e1c465eb 244
dudmuck 2:fdae76e1215e 245 void SX127x_lora::setBw(uint8_t bw)
dudmuck 2:fdae76e1215e 246 {
dudmuck 2:fdae76e1215e 247 if (!m_xcvr.RegOpMode.bits.LongRangeMode)
dudmuck 2:fdae76e1215e 248 return;
dudmuck 2:fdae76e1215e 249
dudmuck 19:1ee6ef1ab73f 250 if (m_xcvr.type == SX1276) {
dudmuck 2:fdae76e1215e 251 RegModemConfig.sx1276bits.Bw = bw;
dudmuck 10:7382c260c4b1 252 if (get_symbol_period() > 16)
dudmuck 10:7382c260c4b1 253 RegModemConfig3.sx1276bits.LowDataRateOptimize = 1;
dudmuck 10:7382c260c4b1 254 else
dudmuck 10:7382c260c4b1 255 RegModemConfig3.sx1276bits.LowDataRateOptimize = 0;
dudmuck 19:1ee6ef1ab73f 256 m_xcvr.write_reg(REG_LR_MODEMCONFIG3, RegModemConfig3.octet);
dudmuck 10:7382c260c4b1 257 } else if (m_xcvr.type == SX1272) {
dudmuck 2:fdae76e1215e 258 RegModemConfig.sx1272bits.Bw = bw;
dudmuck 10:7382c260c4b1 259 if (get_symbol_period() > 16)
dudmuck 2:fdae76e1215e 260 RegModemConfig.sx1272bits.LowDataRateOptimize = 1;
dudmuck 2:fdae76e1215e 261 else
dudmuck 2:fdae76e1215e 262 RegModemConfig.sx1272bits.LowDataRateOptimize = 0;
dudmuck 2:fdae76e1215e 263 } else
dudmuck 2:fdae76e1215e 264 return;
dudmuck 2:fdae76e1215e 265
dudmuck 2:fdae76e1215e 266 m_xcvr.write_reg(REG_LR_MODEMCONFIG, RegModemConfig.octet);
dudmuck 2:fdae76e1215e 267 }
dudmuck 2:fdae76e1215e 268
dudmuck 2:fdae76e1215e 269
dudmuck 2:fdae76e1215e 270
dudmuck 2:fdae76e1215e 271 uint8_t SX127x_lora::getSf(void)
dudmuck 2:fdae76e1215e 272 {
dudmuck 2:fdae76e1215e 273 // spreading factor same between sx127[26]
dudmuck 2:fdae76e1215e 274 return RegModemConfig2.sx1276bits.SpreadingFactor;
dudmuck 2:fdae76e1215e 275 }
dudmuck 2:fdae76e1215e 276
dudmuck 2:fdae76e1215e 277 void SX127x_lora::set_nb_trig_peaks(int n)
dudmuck 2:fdae76e1215e 278 {
dudmuck 13:1953e70522aa 279 /* TODO: different requirements for RX_CONTINUOUS vs RX_SINGLE */
dudmuck 2:fdae76e1215e 280 RegTest31.bits.detect_trig_same_peaks_nb = n;
dudmuck 2:fdae76e1215e 281 m_xcvr.write_reg(REG_LR_TEST31, RegTest31.octet);
dudmuck 2:fdae76e1215e 282 }
dudmuck 2:fdae76e1215e 283
dudmuck 2:fdae76e1215e 284
dudmuck 2:fdae76e1215e 285 void SX127x_lora::setSf(uint8_t sf)
dudmuck 2:fdae76e1215e 286 {
dudmuck 2:fdae76e1215e 287 if (!m_xcvr.RegOpMode.bits.LongRangeMode)
dudmuck 19:1ee6ef1ab73f 288 return;
dudmuck 19:1ee6ef1ab73f 289
dudmuck 2:fdae76e1215e 290 // write register at 0x37 with value 0xc if at SF6
dudmuck 2:fdae76e1215e 291 if (sf < 7)
dudmuck 2:fdae76e1215e 292 m_xcvr.write_reg(REG_LR_DETECTION_THRESHOLD, 0x0c);
dudmuck 2:fdae76e1215e 293 else
dudmuck 2:fdae76e1215e 294 m_xcvr.write_reg(REG_LR_DETECTION_THRESHOLD, 0x0a);
dudmuck 2:fdae76e1215e 295
dudmuck 2:fdae76e1215e 296 RegModemConfig2.sx1276bits.SpreadingFactor = sf; // spreading factor same between sx127[26]
dudmuck 2:fdae76e1215e 297 m_xcvr.write_reg(REG_LR_MODEMCONFIG2, RegModemConfig2.octet);
dudmuck 2:fdae76e1215e 298
dudmuck 2:fdae76e1215e 299 if (m_xcvr.type == SX1272) {
dudmuck 10:7382c260c4b1 300 if (get_symbol_period() > 16)
dudmuck 2:fdae76e1215e 301 RegModemConfig.sx1272bits.LowDataRateOptimize = 1;
dudmuck 2:fdae76e1215e 302 else
dudmuck 2:fdae76e1215e 303 RegModemConfig.sx1272bits.LowDataRateOptimize = 0;
dudmuck 2:fdae76e1215e 304 m_xcvr.write_reg(REG_LR_MODEMCONFIG, RegModemConfig.octet);
dudmuck 2:fdae76e1215e 305 } else if (m_xcvr.type == SX1276) {
dudmuck 10:7382c260c4b1 306 if (get_symbol_period() > 16)
dudmuck 2:fdae76e1215e 307 RegModemConfig3.sx1276bits.LowDataRateOptimize = 1;
dudmuck 2:fdae76e1215e 308 else
dudmuck 2:fdae76e1215e 309 RegModemConfig3.sx1276bits.LowDataRateOptimize = 0;
dudmuck 2:fdae76e1215e 310 m_xcvr.write_reg(REG_LR_MODEMCONFIG3, RegModemConfig3.octet);
dudmuck 2:fdae76e1215e 311 }
dudmuck 2:fdae76e1215e 312 }
dudmuck 2:fdae76e1215e 313
dudmuck 2:fdae76e1215e 314
dudmuck 2:fdae76e1215e 315
dudmuck 2:fdae76e1215e 316 bool SX127x_lora::getRxPayloadCrcOn(void)
dudmuck 2:fdae76e1215e 317 {
dudmuck 26:4876e515ff4c 318 /* RxPayloadCrcOn enables CRC generation in transmitter */
dudmuck 26:4876e515ff4c 319 /* in implicit mode, this bit also enables CRC in receiver */
dudmuck 26:4876e515ff4c 320 if (m_xcvr.type == SX1276) {
dudmuck 26:4876e515ff4c 321 RegModemConfig2.octet = m_xcvr.read_reg(REG_LR_MODEMCONFIG2);
dudmuck 2:fdae76e1215e 322 return RegModemConfig2.sx1276bits.RxPayloadCrcOn;
dudmuck 26:4876e515ff4c 323 } else if (m_xcvr.type == SX1272) {
dudmuck 26:4876e515ff4c 324 RegModemConfig.octet = m_xcvr.read_reg(REG_LR_MODEMCONFIG);
dudmuck 2:fdae76e1215e 325 return RegModemConfig.sx1272bits.RxPayloadCrcOn;
dudmuck 26:4876e515ff4c 326 } else
dudmuck 2:fdae76e1215e 327 return 0;
dudmuck 2:fdae76e1215e 328 }
dudmuck 2:fdae76e1215e 329
dudmuck 2:fdae76e1215e 330
dudmuck 2:fdae76e1215e 331 void SX127x_lora::setRxPayloadCrcOn(bool on)
dudmuck 2:fdae76e1215e 332 {
dudmuck 2:fdae76e1215e 333 if (m_xcvr.type == SX1276) {
dudmuck 2:fdae76e1215e 334 RegModemConfig2.sx1276bits.RxPayloadCrcOn = on;
dudmuck 2:fdae76e1215e 335 m_xcvr.write_reg(REG_LR_MODEMCONFIG2, RegModemConfig2.octet);
dudmuck 2:fdae76e1215e 336 } else if (m_xcvr.type == SX1272) {
dudmuck 2:fdae76e1215e 337 RegModemConfig.sx1272bits.RxPayloadCrcOn = on;
dudmuck 2:fdae76e1215e 338 m_xcvr.write_reg(REG_LR_MODEMCONFIG, RegModemConfig.octet);
dudmuck 2:fdae76e1215e 339 }
dudmuck 2:fdae76e1215e 340 }
dudmuck 2:fdae76e1215e 341
dudmuck 2:fdae76e1215e 342
dudmuck 2:fdae76e1215e 343
dudmuck 2:fdae76e1215e 344 bool SX127x_lora::getAgcAutoOn(void)
dudmuck 2:fdae76e1215e 345 {
dudmuck 2:fdae76e1215e 346 if (m_xcvr.type == SX1276) {
dudmuck 2:fdae76e1215e 347 RegModemConfig3.octet = m_xcvr.read_reg(REG_LR_MODEMCONFIG3);
dudmuck 2:fdae76e1215e 348 return RegModemConfig3.sx1276bits.AgcAutoOn;
dudmuck 2:fdae76e1215e 349 } else if (m_xcvr.type == SX1272) {
dudmuck 2:fdae76e1215e 350 RegModemConfig2.octet = m_xcvr.read_reg(REG_LR_MODEMCONFIG2);
dudmuck 2:fdae76e1215e 351 return RegModemConfig2.sx1272bits.AgcAutoOn;
dudmuck 2:fdae76e1215e 352 } else
dudmuck 2:fdae76e1215e 353 return 0;
dudmuck 2:fdae76e1215e 354 }
dudmuck 2:fdae76e1215e 355
dudmuck 2:fdae76e1215e 356 void SX127x_lora::setAgcAutoOn(bool on)
dudmuck 2:fdae76e1215e 357 {
dudmuck 2:fdae76e1215e 358 if (m_xcvr.type == SX1276) {
dudmuck 2:fdae76e1215e 359 RegModemConfig3.sx1276bits.AgcAutoOn = on;
dudmuck 2:fdae76e1215e 360 m_xcvr.write_reg(REG_LR_MODEMCONFIG3, RegModemConfig3.octet);
dudmuck 2:fdae76e1215e 361 } else if (m_xcvr.type == SX1272) {
dudmuck 2:fdae76e1215e 362 RegModemConfig2.sx1272bits.AgcAutoOn = on;
dudmuck 2:fdae76e1215e 363 m_xcvr.write_reg(REG_LR_MODEMCONFIG2, RegModemConfig2.octet);
dudmuck 2:fdae76e1215e 364 }
dudmuck 2:fdae76e1215e 365
dudmuck 2:fdae76e1215e 366 }
dudmuck 2:fdae76e1215e 367
dudmuck 17:59279bc8cdab 368 void SX127x_lora::invert_tx(bool inv)
dudmuck 17:59279bc8cdab 369 {
dudmuck 17:59279bc8cdab 370 RegTest33.bits.chirp_invert_tx = !inv;
dudmuck 17:59279bc8cdab 371 m_xcvr.write_reg(REG_LR_TEST33, RegTest33.octet);
dudmuck 17:59279bc8cdab 372 }
dudmuck 17:59279bc8cdab 373
dudmuck 17:59279bc8cdab 374 void SX127x_lora::invert_rx(bool inv)
dudmuck 17:59279bc8cdab 375 {
dudmuck 17:59279bc8cdab 376 RegTest33.bits.invert_i_q = inv;
dudmuck 17:59279bc8cdab 377 m_xcvr.write_reg(REG_LR_TEST33, RegTest33.octet);
dudmuck 17:59279bc8cdab 378 /**/
dudmuck 17:59279bc8cdab 379 RegDriftInvert.bits.invert_timing_error_per_symbol = !RegTest33.bits.invert_i_q;
dudmuck 17:59279bc8cdab 380 m_xcvr.write_reg(REG_LR_DRIFT_INVERT, RegDriftInvert.octet);
dudmuck 17:59279bc8cdab 381 }
dudmuck 17:59279bc8cdab 382
dudmuck 2:fdae76e1215e 383 void SX127x_lora::start_tx(uint8_t len)
dudmuck 7:927a05f84ede 384 {
dudmuck 2:fdae76e1215e 385 // DIO0 to TxDone
dudmuck 2:fdae76e1215e 386 if (m_xcvr.RegDioMapping1.bits.Dio0Mapping != 1) {
dudmuck 2:fdae76e1215e 387 m_xcvr.RegDioMapping1.bits.Dio0Mapping = 1;
dudmuck 2:fdae76e1215e 388 m_xcvr.write_reg(REG_DIOMAPPING1, m_xcvr.RegDioMapping1.octet);
dudmuck 2:fdae76e1215e 389 }
dudmuck 2:fdae76e1215e 390
dudmuck 2:fdae76e1215e 391 // set FifoPtrAddr to FifoTxPtrBase
dudmuck 2:fdae76e1215e 392 m_xcvr.write_reg(REG_LR_FIFOADDRPTR, m_xcvr.read_reg(REG_LR_FIFOTXBASEADDR));
dudmuck 2:fdae76e1215e 393
dudmuck 2:fdae76e1215e 394 // write PayloadLength bytes to fifo
dudmuck 2:fdae76e1215e 395 write_fifo(len);
dudmuck 7:927a05f84ede 396
dudmuck 2:fdae76e1215e 397 m_xcvr.set_opmode(RF_OPMODE_TRANSMITTER);
dudmuck 2:fdae76e1215e 398 }
dudmuck 2:fdae76e1215e 399
dudmuck 27:da6341d9d5b1 400 void SX127x_lora::start_rx(chip_mode_e mode)
dudmuck 2:fdae76e1215e 401 {
dudmuck 2:fdae76e1215e 402 if (!m_xcvr.RegOpMode.bits.LongRangeMode)
dudmuck 12:bda42457c34a 403 return; // fsk mode
dudmuck 12:bda42457c34a 404 if (m_xcvr.RegOpMode.sx1276LORAbits.AccessSharedReg)
dudmuck 12:bda42457c34a 405 return; // fsk page
dudmuck 13:1953e70522aa 406
dudmuck 19:1ee6ef1ab73f 407 if (m_xcvr.type == SX1276) {
dudmuck 19:1ee6ef1ab73f 408 if (RegModemConfig.sx1276bits.Bw == 9) { // if 500KHz bw: improved tolerance of reference frequency error
dudmuck 19:1ee6ef1ab73f 409 if (RegAutoDrift.bits.freq_to_time_drift_auto) {
dudmuck 19:1ee6ef1ab73f 410 RegAutoDrift.bits.freq_to_time_drift_auto = 0;
dudmuck 19:1ee6ef1ab73f 411 m_xcvr.write_reg(REG_LR_SX1276_AUTO_DRIFT, RegAutoDrift.octet);
dudmuck 19:1ee6ef1ab73f 412 }
dudmuck 19:1ee6ef1ab73f 413 if (m_xcvr.HF) {
dudmuck 19:1ee6ef1ab73f 414 // > 525MHz
dudmuck 19:1ee6ef1ab73f 415 if (RegGainDrift.bits.freq_to_time_drift != 0x24) {
dudmuck 19:1ee6ef1ab73f 416 RegGainDrift.bits.freq_to_time_drift = 0x24;
dudmuck 19:1ee6ef1ab73f 417 m_xcvr.write_reg(REG_LR_GAIN_DRIFT, RegGainDrift.octet);
dudmuck 19:1ee6ef1ab73f 418 }
dudmuck 19:1ee6ef1ab73f 419 } else {
dudmuck 19:1ee6ef1ab73f 420 // < 525MHz
dudmuck 19:1ee6ef1ab73f 421 if (RegGainDrift.bits.freq_to_time_drift != 0x3f) {
dudmuck 19:1ee6ef1ab73f 422 RegGainDrift.bits.freq_to_time_drift = 0x3f;
dudmuck 19:1ee6ef1ab73f 423 m_xcvr.write_reg(REG_LR_GAIN_DRIFT, RegGainDrift.octet);
dudmuck 19:1ee6ef1ab73f 424 }
dudmuck 19:1ee6ef1ab73f 425 }
dudmuck 19:1ee6ef1ab73f 426
dudmuck 19:1ee6ef1ab73f 427 } else {
dudmuck 19:1ee6ef1ab73f 428 if (!RegAutoDrift.bits.freq_to_time_drift_auto) {
dudmuck 19:1ee6ef1ab73f 429 RegAutoDrift.bits.freq_to_time_drift_auto = 1;
dudmuck 19:1ee6ef1ab73f 430 m_xcvr.write_reg(REG_LR_SX1276_AUTO_DRIFT, RegAutoDrift.octet);
dudmuck 19:1ee6ef1ab73f 431 }
dudmuck 19:1ee6ef1ab73f 432 }
dudmuck 19:1ee6ef1ab73f 433 } // ... if (m_xcvr.type == SX1276)
dudmuck 19:1ee6ef1ab73f 434
dudmuck 19:1ee6ef1ab73f 435 // RX_CONTINUOUS: false detections vs missed detections tradeoff
dudmuck 19:1ee6ef1ab73f 436 switch (RegModemConfig2.sx1276bits.SpreadingFactor) {
dudmuck 19:1ee6ef1ab73f 437 case 6:
dudmuck 19:1ee6ef1ab73f 438 set_nb_trig_peaks(3);
dudmuck 19:1ee6ef1ab73f 439 break;
dudmuck 19:1ee6ef1ab73f 440 case 7:
dudmuck 19:1ee6ef1ab73f 441 set_nb_trig_peaks(4);
dudmuck 19:1ee6ef1ab73f 442 break;
dudmuck 19:1ee6ef1ab73f 443 default:
dudmuck 19:1ee6ef1ab73f 444 set_nb_trig_peaks(5);
dudmuck 19:1ee6ef1ab73f 445 break;
dudmuck 19:1ee6ef1ab73f 446 }
dudmuck 19:1ee6ef1ab73f 447
dudmuck 27:da6341d9d5b1 448 m_xcvr.set_opmode(mode);
dudmuck 2:fdae76e1215e 449
dudmuck 2:fdae76e1215e 450 if (m_xcvr.RegDioMapping1.bits.Dio0Mapping != 0) {
dudmuck 2:fdae76e1215e 451 m_xcvr.RegDioMapping1.bits.Dio0Mapping = 0; // DIO0 to RxDone
dudmuck 2:fdae76e1215e 452 m_xcvr.write_reg(REG_DIOMAPPING1, m_xcvr.RegDioMapping1.octet);
dudmuck 2:fdae76e1215e 453 }
dudmuck 2:fdae76e1215e 454
dudmuck 2:fdae76e1215e 455 m_xcvr.write_reg(REG_LR_FIFOADDRPTR, m_xcvr.read_reg(REG_LR_FIFORXBASEADDR));
dudmuck 2:fdae76e1215e 456 }
dudmuck 2:fdae76e1215e 457
dudmuck 23:1df3dddcb43e 458 int SX127x_lora::get_pkt_rssi()
dudmuck 2:fdae76e1215e 459 {
dudmuck 23:1df3dddcb43e 460 if (m_xcvr.type == SX1276) {
dudmuck 23:1df3dddcb43e 461 if (m_xcvr.HF)
dudmuck 23:1df3dddcb43e 462 return RegPktRssiValue - 157;
dudmuck 23:1df3dddcb43e 463 else
dudmuck 23:1df3dddcb43e 464 return RegPktRssiValue - 164;
dudmuck 23:1df3dddcb43e 465 } else
dudmuck 31:b66d7a057b22 466 return RegPktRssiValue - 139;
dudmuck 2:fdae76e1215e 467 }
dudmuck 2:fdae76e1215e 468
dudmuck 23:1df3dddcb43e 469 int SX127x_lora::get_current_rssi()
dudmuck 23:1df3dddcb43e 470 {
dudmuck 23:1df3dddcb43e 471 uint8_t v = m_xcvr.read_reg(REG_LR_RSSIVALUE);
dudmuck 23:1df3dddcb43e 472 if (m_xcvr.type == SX1276) {
dudmuck 23:1df3dddcb43e 473 if (m_xcvr.HF)
dudmuck 23:1df3dddcb43e 474 return v - 157;
dudmuck 23:1df3dddcb43e 475 else
dudmuck 23:1df3dddcb43e 476 return v - 164;
dudmuck 23:1df3dddcb43e 477 } else
dudmuck 31:b66d7a057b22 478 return v - 139;
dudmuck 23:1df3dddcb43e 479 }
dudmuck 23:1df3dddcb43e 480
dudmuck 2:fdae76e1215e 481 service_action_e SX127x_lora::service()
dudmuck 2:fdae76e1215e 482 {
dudmuck 2:fdae76e1215e 483 if (m_xcvr.RegOpMode.bits.Mode == RF_OPMODE_RECEIVER) {
dudmuck 2:fdae76e1215e 484 if (poll_vh) {
dudmuck 2:fdae76e1215e 485 RegIrqFlags.octet = m_xcvr.read_reg(REG_LR_IRQFLAGS);
dudmuck 2:fdae76e1215e 486 if (RegIrqFlags.bits.ValidHeader) {
dudmuck 2:fdae76e1215e 487 RegIrqFlags.octet = 0;
dudmuck 2:fdae76e1215e 488 RegIrqFlags.bits.ValidHeader = 1;
dudmuck 2:fdae76e1215e 489 m_xcvr.write_reg(REG_LR_IRQFLAGS, RegIrqFlags.octet);
dudmuck 2:fdae76e1215e 490 printf("VH\r\n");
dudmuck 2:fdae76e1215e 491 }
dudmuck 2:fdae76e1215e 492 }
dudmuck 2:fdae76e1215e 493 }
dudmuck 7:927a05f84ede 494
dudmuck 2:fdae76e1215e 495 if (m_xcvr.dio0 == 0)
dudmuck 2:fdae76e1215e 496 return SERVICE_NONE;
dudmuck 2:fdae76e1215e 497
dudmuck 2:fdae76e1215e 498 switch (m_xcvr.RegDioMapping1.bits.Dio0Mapping) {
dudmuck 2:fdae76e1215e 499 case 0: // RxDone
dudmuck 2:fdae76e1215e 500 /* user checks for CRC error in IrqFlags */
dudmuck 2:fdae76e1215e 501 RegIrqFlags.octet = m_xcvr.read_reg(REG_LR_IRQFLAGS); // save flags
dudmuck 2:fdae76e1215e 502 RegHopChannel.octet = m_xcvr.read_reg(REG_LR_HOPCHANNEL);
dudmuck 2:fdae76e1215e 503 //printf("[%02x]", RegIrqFlags.octet);
dudmuck 2:fdae76e1215e 504 m_xcvr.write_reg(REG_LR_IRQFLAGS, RegIrqFlags.octet); // clear flags in radio
dudmuck 2:fdae76e1215e 505
dudmuck 2:fdae76e1215e 506 /* any register of interest on received packet is read(saved) here */
dudmuck 2:fdae76e1215e 507 RegModemStatus.octet = m_xcvr.read_reg(REG_LR_MODEMSTAT);
dudmuck 2:fdae76e1215e 508 RegPktSnrValue = m_xcvr.read_reg(REG_LR_PKTSNRVALUE);
dudmuck 2:fdae76e1215e 509 RegPktRssiValue = m_xcvr.read_reg(REG_LR_PKTRSSIVALUE);
dudmuck 2:fdae76e1215e 510 RegRxNbBytes = m_xcvr.read_reg(REG_LR_RXNBBYTES);
dudmuck 2:fdae76e1215e 511
dudmuck 2:fdae76e1215e 512 m_xcvr.write_reg(REG_LR_FIFOADDRPTR, m_xcvr.read_reg(REG_LR_FIFORXCURRENTADDR));
dudmuck 2:fdae76e1215e 513 read_fifo(RegRxNbBytes);
dudmuck 2:fdae76e1215e 514 return SERVICE_READ_FIFO;
dudmuck 2:fdae76e1215e 515 case 1: // TxDone
dudmuck 2:fdae76e1215e 516 RegIrqFlags.octet = 0;
dudmuck 2:fdae76e1215e 517 RegIrqFlags.bits.TxDone = 1;
dudmuck 2:fdae76e1215e 518 m_xcvr.write_reg(REG_LR_IRQFLAGS, RegIrqFlags.octet);
dudmuck 2:fdae76e1215e 519 return SERVICE_TX_DONE;
dudmuck 2:fdae76e1215e 520 } // ...switch (RegDioMapping1.bits.Dio0Mapping)
dudmuck 2:fdae76e1215e 521
dudmuck 2:fdae76e1215e 522 return SERVICE_ERROR;
dudmuck 12:bda42457c34a 523 }
dudmuck 12:bda42457c34a 524