Ilya Krylov / SX127x1

123

sx127x_lora.cpp@16:3de8e1c465eb, 2015-05-21 (annotated)

Committer:
dudmuck
Date:
Thu May 21 18:24:04 2015 +0000
Revision:
16:3de8e1c465eb
Parent:
15:3f3fc6792f97
Child:
17:59279bc8cdab
added lora function to set bandwidth in KHz

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 2:fdae76e1215e 21 RegModemConfig.octet = m_xcvr.read_reg(REG_LR_MODEMCONFIG);
dudmuck 2:fdae76e1215e 22 RegModemConfig2.octet = m_xcvr.read_reg(REG_LR_MODEMCONFIG2);
dudmuck 2:fdae76e1215e 23 RegTest31.octet = m_xcvr.read_reg(REG_LR_TEST31);
dudmuck 2:fdae76e1215e 24
dudmuck 2:fdae76e1215e 25 // CRC for TX is disabled by default
dudmuck 2:fdae76e1215e 26 setRxPayloadCrcOn(true);
dudmuck 2:fdae76e1215e 27 }
dudmuck 2:fdae76e1215e 28
dudmuck 2:fdae76e1215e 29 SX127x_lora::~SX127x_lora()
dudmuck 2:fdae76e1215e 30 {
dudmuck 2:fdae76e1215e 31 }
dudmuck 2:fdae76e1215e 32
dudmuck 2:fdae76e1215e 33 void SX127x_lora::write_fifo(uint8_t len)
dudmuck 2:fdae76e1215e 34 {
dudmuck 2:fdae76e1215e 35 int i;
dudmuck 2:fdae76e1215e 36
dudmuck 2:fdae76e1215e 37 m_xcvr.m_cs = 0;
dudmuck 2:fdae76e1215e 38 m_xcvr.m_spi.write(REG_FIFO | 0x80); // bit7 is high for writing to radio
dudmuck 2:fdae76e1215e 39
dudmuck 2:fdae76e1215e 40 for (i = 0; i < len; i++) {
dudmuck 2:fdae76e1215e 41 m_xcvr.m_spi.write(m_xcvr.tx_buf[i]);
dudmuck 2:fdae76e1215e 42 }
dudmuck 2:fdae76e1215e 43 m_xcvr.m_cs = 1;
dudmuck 2:fdae76e1215e 44 }
dudmuck 2:fdae76e1215e 45
dudmuck 2:fdae76e1215e 46 void SX127x_lora::read_fifo(uint8_t len)
dudmuck 2:fdae76e1215e 47 {
dudmuck 2:fdae76e1215e 48 int i;
dudmuck 2:fdae76e1215e 49
dudmuck 2:fdae76e1215e 50 m_xcvr.m_cs = 0;
dudmuck 2:fdae76e1215e 51 m_xcvr.m_spi.write(REG_FIFO); // bit7 is low for reading from radio
dudmuck 2:fdae76e1215e 52 for (i = 0; i < len; i++) {
dudmuck 2:fdae76e1215e 53 m_xcvr.rx_buf[i] = m_xcvr.m_spi.write(0);
dudmuck 2:fdae76e1215e 54 }
dudmuck 2:fdae76e1215e 55 m_xcvr.m_cs = 1;
dudmuck 2:fdae76e1215e 56 }
dudmuck 2:fdae76e1215e 57
dudmuck 2:fdae76e1215e 58 void SX127x_lora::enable()
dudmuck 2:fdae76e1215e 59 {
dudmuck 2:fdae76e1215e 60 m_xcvr.set_opmode(RF_OPMODE_SLEEP);
dudmuck 2:fdae76e1215e 61
dudmuck 2:fdae76e1215e 62 m_xcvr.RegOpMode.bits.LongRangeMode = 1;
dudmuck 2:fdae76e1215e 63 m_xcvr.write_reg(REG_OPMODE, m_xcvr.RegOpMode.octet);
dudmuck 2:fdae76e1215e 64
dudmuck 2:fdae76e1215e 65 /*RegOpMode.octet = read_reg(REG_OPMODE);
dudmuck 2:fdae76e1215e 66 printf("setloraon:%02x\r\n", RegOpMode.octet);*/
dudmuck 2:fdae76e1215e 67
dudmuck 2:fdae76e1215e 68
dudmuck 2:fdae76e1215e 69 /* // RxDone RxTimeout FhssChangeChannel CadDone
dudmuck 2:fdae76e1215e 70 SX1272LR->RegDioMapping1 = RFLR_DIOMAPPING1_DIO0_00 | RFLR_DIOMAPPING1_DIO1_00 | RFLR_DIOMAPPING1_DIO2_00 | RFLR_DIOMAPPING1_DIO3_00;
dudmuck 2:fdae76e1215e 71 // CadDetected ModeReady
dudmuck 2:fdae76e1215e 72 SX1272LR->RegDioMapping2 = RFLR_DIOMAPPING2_DIO4_00 | RFLR_DIOMAPPING2_DIO5_00;
dudmuck 2:fdae76e1215e 73 SX1272WriteBuffer( REG_LR_DIOMAPPING1, &SX1272LR->RegDioMapping1, 2 );*/
dudmuck 2:fdae76e1215e 74 m_xcvr.RegDioMapping1.bits.Dio0Mapping = 0; // DIO0 to RxDone
dudmuck 2:fdae76e1215e 75 m_xcvr.RegDioMapping1.bits.Dio1Mapping = 0;
dudmuck 2:fdae76e1215e 76 m_xcvr.write_reg(REG_DIOMAPPING1, m_xcvr.RegDioMapping1.octet);
dudmuck 2:fdae76e1215e 77
dudmuck 2:fdae76e1215e 78 // todo: read LoRa regsiters
dudmuck 2:fdae76e1215e 79 //SX1272ReadBuffer( REG_LR_OPMODE, SX1272Regs + 1, 0x70 - 1 );
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 2:fdae76e1215e 120 if (m_xcvr.type == SX1276)
dudmuck 2:fdae76e1215e 121 return RegModemConfig.sx1276bits.ImplicitHeaderModeOn;
dudmuck 2:fdae76e1215e 122 else if (m_xcvr.type == SX1272)
dudmuck 2:fdae76e1215e 123 return RegModemConfig.sx1272bits.ImplicitHeaderModeOn;
dudmuck 2:fdae76e1215e 124 else
dudmuck 2:fdae76e1215e 125 return false;
dudmuck 2:fdae76e1215e 126 }
dudmuck 2:fdae76e1215e 127
dudmuck 2:fdae76e1215e 128 void SX127x_lora::setHeaderMode(bool hm)
dudmuck 2:fdae76e1215e 129 {
dudmuck 2:fdae76e1215e 130 if (m_xcvr.type == SX1276)
dudmuck 2:fdae76e1215e 131 RegModemConfig.sx1276bits.ImplicitHeaderModeOn = hm;
dudmuck 2:fdae76e1215e 132 else if (m_xcvr.type == SX1272)
dudmuck 2:fdae76e1215e 133 RegModemConfig.sx1272bits.ImplicitHeaderModeOn = hm;
dudmuck 2:fdae76e1215e 134 else
dudmuck 2:fdae76e1215e 135 return;
dudmuck 2:fdae76e1215e 136
dudmuck 2:fdae76e1215e 137 m_xcvr.write_reg(REG_LR_MODEMCONFIG, RegModemConfig.octet);
dudmuck 2:fdae76e1215e 138 }
dudmuck 2:fdae76e1215e 139
dudmuck 2:fdae76e1215e 140
dudmuck 2:fdae76e1215e 141 uint8_t SX127x_lora::getBw(void)
dudmuck 2:fdae76e1215e 142 {
dudmuck 2:fdae76e1215e 143 if (m_xcvr.type == SX1276)
dudmuck 2:fdae76e1215e 144 return RegModemConfig.sx1276bits.Bw;
dudmuck 2:fdae76e1215e 145 else if (m_xcvr.type == SX1272)
dudmuck 2:fdae76e1215e 146 return RegModemConfig.sx1272bits.Bw;
dudmuck 2:fdae76e1215e 147 else
dudmuck 2:fdae76e1215e 148 return 0;
dudmuck 2:fdae76e1215e 149 }
dudmuck 15:3f3fc6792f97 150
dudmuck 15:3f3fc6792f97 151 int SX127x_lora::get_freq_error_Hz()
dudmuck 15:3f3fc6792f97 152 {
dudmuck 15:3f3fc6792f97 153 int freq_error;
dudmuck 15:3f3fc6792f97 154 float f, khz = 0;
dudmuck 15:3f3fc6792f97 155 freq_error = m_xcvr.read_reg(REG_LR_TEST28);
dudmuck 15:3f3fc6792f97 156 freq_error <<= 8;
dudmuck 15:3f3fc6792f97 157 freq_error += m_xcvr.read_reg(REG_LR_TEST29);
dudmuck 15:3f3fc6792f97 158 freq_error <<= 8;
dudmuck 15:3f3fc6792f97 159 freq_error += m_xcvr.read_reg(REG_LR_TEST2A);
dudmuck 15:3f3fc6792f97 160 if (freq_error & 0x80000) { // 20bit value is negative
dudmuck 15:3f3fc6792f97 161 //signed 20bit to 32bit
dudmuck 15:3f3fc6792f97 162 freq_error |= 0xfff00000;
dudmuck 15:3f3fc6792f97 163 }
dudmuck 15:3f3fc6792f97 164 f = freq_error / (float)XTAL_FREQ;
dudmuck 15:3f3fc6792f97 165 f *= (float)0x1000000; // 2^24
dudmuck 15:3f3fc6792f97 166 if (m_xcvr.type == SX1272) {
dudmuck 15:3f3fc6792f97 167 switch (RegModemConfig.sx1272bits.Bw) {
dudmuck 15:3f3fc6792f97 168 case 0: khz = 125; break;
dudmuck 15:3f3fc6792f97 169 case 1: khz = 250; break;
dudmuck 15:3f3fc6792f97 170 case 2: khz = 500; break;
dudmuck 15:3f3fc6792f97 171 }
dudmuck 15:3f3fc6792f97 172 } else if (m_xcvr.type == SX1276) {
dudmuck 15:3f3fc6792f97 173 switch (RegModemConfig.sx1276bits.Bw) {
dudmuck 15:3f3fc6792f97 174 case 0: khz = 7.8; break;
dudmuck 15:3f3fc6792f97 175 case 1: khz = 10.4; break;
dudmuck 15:3f3fc6792f97 176 case 2: khz = 15.6; break;
dudmuck 15:3f3fc6792f97 177 case 3: khz = 20.8; break;
dudmuck 15:3f3fc6792f97 178 case 4: khz = 31.25; break;
dudmuck 15:3f3fc6792f97 179 case 5: khz = 41.7; break;
dudmuck 15:3f3fc6792f97 180 case 6: khz = 62.5; break;
dudmuck 15:3f3fc6792f97 181 case 7: khz = 125; break;
dudmuck 15:3f3fc6792f97 182 case 8: khz = 250; break;
dudmuck 15:3f3fc6792f97 183 case 9: khz = 500; break;
dudmuck 15:3f3fc6792f97 184 }
dudmuck 15:3f3fc6792f97 185 }
dudmuck 15:3f3fc6792f97 186 f *= khz / 500;
dudmuck 15:3f3fc6792f97 187 return (int)f;
dudmuck 15:3f3fc6792f97 188 }
dudmuck 15:3f3fc6792f97 189
dudmuck 10:7382c260c4b1 190 float SX127x_lora::get_symbol_period()
dudmuck 10:7382c260c4b1 191 {
dudmuck 10:7382c260c4b1 192 float khz = 0;
dudmuck 10:7382c260c4b1 193
dudmuck 10:7382c260c4b1 194 if (m_xcvr.type == SX1276) {
dudmuck 10:7382c260c4b1 195 switch (RegModemConfig.sx1276bits.Bw) {
dudmuck 10:7382c260c4b1 196 case 0: khz = 7.8; break;
dudmuck 10:7382c260c4b1 197 case 1: khz = 10.4; break;
dudmuck 10:7382c260c4b1 198 case 2: khz = 15.6; break;
dudmuck 10:7382c260c4b1 199 case 3: khz = 20.8; break;
dudmuck 10:7382c260c4b1 200 case 4: khz = 31.25; break;
dudmuck 10:7382c260c4b1 201 case 5: khz = 41.7; break;
dudmuck 10:7382c260c4b1 202 case 6: khz = 62.5; break;
dudmuck 10:7382c260c4b1 203 case 7: khz = 125; break;
dudmuck 10:7382c260c4b1 204 case 8: khz = 250; break;
dudmuck 10:7382c260c4b1 205 case 9: khz = 500; break;
dudmuck 10:7382c260c4b1 206 }
dudmuck 10:7382c260c4b1 207 } else if (m_xcvr.type == SX1272) {
dudmuck 10:7382c260c4b1 208 switch (RegModemConfig.sx1272bits.Bw) {
dudmuck 10:7382c260c4b1 209 case 0: khz = 125; break;
dudmuck 10:7382c260c4b1 210 case 1: khz = 250; break;
dudmuck 10:7382c260c4b1 211 case 2: khz = 500; break;
dudmuck 10:7382c260c4b1 212 }
dudmuck 10:7382c260c4b1 213 }
dudmuck 10:7382c260c4b1 214
dudmuck 10:7382c260c4b1 215 // return symbol duration in milliseconds
dudmuck 10:7382c260c4b1 216 return (1 << RegModemConfig2.sx1276bits.SpreadingFactor) / khz;
dudmuck 10:7382c260c4b1 217 }
dudmuck 2:fdae76e1215e 218
dudmuck 16:3de8e1c465eb 219 void SX127x_lora::setBw_KHz(int khz)
dudmuck 16:3de8e1c465eb 220 {
dudmuck 16:3de8e1c465eb 221 uint8_t bw = 0;
dudmuck 16:3de8e1c465eb 222
dudmuck 16:3de8e1c465eb 223 if (m_xcvr.type == SX1276) {
dudmuck 16:3de8e1c465eb 224 if (khz <= 8) bw = 0;
dudmuck 16:3de8e1c465eb 225 else if (khz <= 11) bw = 1;
dudmuck 16:3de8e1c465eb 226 else if (khz <= 16) bw = 2;
dudmuck 16:3de8e1c465eb 227 else if (khz <= 21) bw = 3;
dudmuck 16:3de8e1c465eb 228 else if (khz <= 32) bw = 4;
dudmuck 16:3de8e1c465eb 229 else if (khz <= 42) bw = 5;
dudmuck 16:3de8e1c465eb 230 else if (khz <= 63) bw = 6;
dudmuck 16:3de8e1c465eb 231 else if (khz <= 125) bw = 7;
dudmuck 16:3de8e1c465eb 232 else if (khz <= 250) bw = 8;
dudmuck 16:3de8e1c465eb 233 else if (khz <= 500) bw = 9;
dudmuck 16:3de8e1c465eb 234 } else if (m_xcvr.type == SX1272) {
dudmuck 16:3de8e1c465eb 235 if (khz <= 125) bw = 0;
dudmuck 16:3de8e1c465eb 236 else if (khz <= 250) bw = 1;
dudmuck 16:3de8e1c465eb 237 else if (khz <= 500) bw = 2;
dudmuck 16:3de8e1c465eb 238 }
dudmuck 16:3de8e1c465eb 239
dudmuck 16:3de8e1c465eb 240 setBw(bw);
dudmuck 16:3de8e1c465eb 241 }
dudmuck 16:3de8e1c465eb 242
dudmuck 2:fdae76e1215e 243 void SX127x_lora::setBw(uint8_t bw)
dudmuck 2:fdae76e1215e 244 {
dudmuck 2:fdae76e1215e 245 if (!m_xcvr.RegOpMode.bits.LongRangeMode)
dudmuck 2:fdae76e1215e 246 return;
dudmuck 2:fdae76e1215e 247
dudmuck 10:7382c260c4b1 248 if (m_xcvr.type == SX1276) {
dudmuck 2:fdae76e1215e 249 RegModemConfig.sx1276bits.Bw = bw;
dudmuck 10:7382c260c4b1 250 if (get_symbol_period() > 16)
dudmuck 10:7382c260c4b1 251 RegModemConfig3.sx1276bits.LowDataRateOptimize = 1;
dudmuck 10:7382c260c4b1 252 else
dudmuck 10:7382c260c4b1 253 RegModemConfig3.sx1276bits.LowDataRateOptimize = 0;
dudmuck 10:7382c260c4b1 254 m_xcvr.write_reg(REG_LR_MODEMCONFIG3, RegModemConfig3.octet);
dudmuck 10:7382c260c4b1 255 } else if (m_xcvr.type == SX1272) {
dudmuck 2:fdae76e1215e 256 RegModemConfig.sx1272bits.Bw = bw;
dudmuck 10:7382c260c4b1 257 if (get_symbol_period() > 16)
dudmuck 2:fdae76e1215e 258 RegModemConfig.sx1272bits.LowDataRateOptimize = 1;
dudmuck 2:fdae76e1215e 259 else
dudmuck 2:fdae76e1215e 260 RegModemConfig.sx1272bits.LowDataRateOptimize = 0;
dudmuck 2:fdae76e1215e 261 } else
dudmuck 2:fdae76e1215e 262 return;
dudmuck 2:fdae76e1215e 263
dudmuck 2:fdae76e1215e 264 m_xcvr.write_reg(REG_LR_MODEMCONFIG, RegModemConfig.octet);
dudmuck 2:fdae76e1215e 265 }
dudmuck 2:fdae76e1215e 266
dudmuck 2:fdae76e1215e 267
dudmuck 2:fdae76e1215e 268
dudmuck 2:fdae76e1215e 269 uint8_t SX127x_lora::getSf(void)
dudmuck 2:fdae76e1215e 270 {
dudmuck 2:fdae76e1215e 271 // spreading factor same between sx127[26]
dudmuck 2:fdae76e1215e 272 return RegModemConfig2.sx1276bits.SpreadingFactor;
dudmuck 2:fdae76e1215e 273 }
dudmuck 2:fdae76e1215e 274
dudmuck 2:fdae76e1215e 275 void SX127x_lora::set_nb_trig_peaks(int n)
dudmuck 2:fdae76e1215e 276 {
dudmuck 13:1953e70522aa 277 /* TODO: different requirements for RX_CONTINUOUS vs RX_SINGLE */
dudmuck 2:fdae76e1215e 278 RegTest31.bits.detect_trig_same_peaks_nb = n;
dudmuck 2:fdae76e1215e 279 m_xcvr.write_reg(REG_LR_TEST31, RegTest31.octet);
dudmuck 2:fdae76e1215e 280 }
dudmuck 2:fdae76e1215e 281
dudmuck 2:fdae76e1215e 282
dudmuck 2:fdae76e1215e 283 void SX127x_lora::setSf(uint8_t sf)
dudmuck 2:fdae76e1215e 284 {
dudmuck 2:fdae76e1215e 285 if (!m_xcvr.RegOpMode.bits.LongRangeMode)
dudmuck 2:fdae76e1215e 286 return;
dudmuck 2:fdae76e1215e 287
dudmuck 2:fdae76e1215e 288 // false detections vs missed detections tradeoff
dudmuck 2:fdae76e1215e 289 switch (sf) {
dudmuck 2:fdae76e1215e 290 case 6:
dudmuck 2:fdae76e1215e 291 set_nb_trig_peaks(3);
dudmuck 2:fdae76e1215e 292 break;
dudmuck 2:fdae76e1215e 293 case 7:
dudmuck 2:fdae76e1215e 294 set_nb_trig_peaks(4);
dudmuck 2:fdae76e1215e 295 break;
dudmuck 2:fdae76e1215e 296 default:
dudmuck 2:fdae76e1215e 297 set_nb_trig_peaks(5);
dudmuck 2:fdae76e1215e 298 break;
dudmuck 2:fdae76e1215e 299 }
dudmuck 2:fdae76e1215e 300
dudmuck 2:fdae76e1215e 301 // write register at 0x37 with value 0xc if at SF6
dudmuck 2:fdae76e1215e 302 if (sf < 7)
dudmuck 2:fdae76e1215e 303 m_xcvr.write_reg(REG_LR_DETECTION_THRESHOLD, 0x0c);
dudmuck 2:fdae76e1215e 304 else
dudmuck 2:fdae76e1215e 305 m_xcvr.write_reg(REG_LR_DETECTION_THRESHOLD, 0x0a);
dudmuck 2:fdae76e1215e 306
dudmuck 2:fdae76e1215e 307 RegModemConfig2.sx1276bits.SpreadingFactor = sf; // spreading factor same between sx127[26]
dudmuck 2:fdae76e1215e 308 m_xcvr.write_reg(REG_LR_MODEMCONFIG2, RegModemConfig2.octet);
dudmuck 2:fdae76e1215e 309
dudmuck 2:fdae76e1215e 310 if (m_xcvr.type == SX1272) {
dudmuck 10:7382c260c4b1 311 if (get_symbol_period() > 16)
dudmuck 2:fdae76e1215e 312 RegModemConfig.sx1272bits.LowDataRateOptimize = 1;
dudmuck 2:fdae76e1215e 313 else
dudmuck 2:fdae76e1215e 314 RegModemConfig.sx1272bits.LowDataRateOptimize = 0;
dudmuck 2:fdae76e1215e 315 m_xcvr.write_reg(REG_LR_MODEMCONFIG, RegModemConfig.octet);
dudmuck 2:fdae76e1215e 316 } else if (m_xcvr.type == SX1276) {
dudmuck 10:7382c260c4b1 317 if (get_symbol_period() > 16)
dudmuck 2:fdae76e1215e 318 RegModemConfig3.sx1276bits.LowDataRateOptimize = 1;
dudmuck 2:fdae76e1215e 319 else
dudmuck 2:fdae76e1215e 320 RegModemConfig3.sx1276bits.LowDataRateOptimize = 0;
dudmuck 2:fdae76e1215e 321 m_xcvr.write_reg(REG_LR_MODEMCONFIG3, RegModemConfig3.octet);
dudmuck 2:fdae76e1215e 322 }
dudmuck 2:fdae76e1215e 323 }
dudmuck 2:fdae76e1215e 324
dudmuck 2:fdae76e1215e 325
dudmuck 2:fdae76e1215e 326
dudmuck 2:fdae76e1215e 327 bool SX127x_lora::getRxPayloadCrcOn(void)
dudmuck 2:fdae76e1215e 328 {
dudmuck 2:fdae76e1215e 329 if (m_xcvr.type == SX1276)
dudmuck 2:fdae76e1215e 330 return RegModemConfig2.sx1276bits.RxPayloadCrcOn;
dudmuck 2:fdae76e1215e 331 else if (m_xcvr.type == SX1272)
dudmuck 2:fdae76e1215e 332 return RegModemConfig.sx1272bits.RxPayloadCrcOn;
dudmuck 2:fdae76e1215e 333 else
dudmuck 2:fdae76e1215e 334 return 0;
dudmuck 2:fdae76e1215e 335 }
dudmuck 2:fdae76e1215e 336
dudmuck 2:fdae76e1215e 337
dudmuck 2:fdae76e1215e 338 void SX127x_lora::setRxPayloadCrcOn(bool on)
dudmuck 2:fdae76e1215e 339 {
dudmuck 2:fdae76e1215e 340 if (m_xcvr.type == SX1276) {
dudmuck 2:fdae76e1215e 341 RegModemConfig2.sx1276bits.RxPayloadCrcOn = on;
dudmuck 2:fdae76e1215e 342 m_xcvr.write_reg(REG_LR_MODEMCONFIG2, RegModemConfig2.octet);
dudmuck 2:fdae76e1215e 343 } else if (m_xcvr.type == SX1272) {
dudmuck 2:fdae76e1215e 344 RegModemConfig.sx1272bits.RxPayloadCrcOn = on;
dudmuck 2:fdae76e1215e 345 m_xcvr.write_reg(REG_LR_MODEMCONFIG, RegModemConfig.octet);
dudmuck 2:fdae76e1215e 346 }
dudmuck 2:fdae76e1215e 347 }
dudmuck 2:fdae76e1215e 348
dudmuck 2:fdae76e1215e 349
dudmuck 2:fdae76e1215e 350
dudmuck 2:fdae76e1215e 351 bool SX127x_lora::getAgcAutoOn(void)
dudmuck 2:fdae76e1215e 352 {
dudmuck 2:fdae76e1215e 353 if (m_xcvr.type == SX1276) {
dudmuck 2:fdae76e1215e 354 RegModemConfig3.octet = m_xcvr.read_reg(REG_LR_MODEMCONFIG3);
dudmuck 2:fdae76e1215e 355 return RegModemConfig3.sx1276bits.AgcAutoOn;
dudmuck 2:fdae76e1215e 356 } else if (m_xcvr.type == SX1272) {
dudmuck 2:fdae76e1215e 357 RegModemConfig2.octet = m_xcvr.read_reg(REG_LR_MODEMCONFIG2);
dudmuck 2:fdae76e1215e 358 return RegModemConfig2.sx1272bits.AgcAutoOn;
dudmuck 2:fdae76e1215e 359 } else
dudmuck 2:fdae76e1215e 360 return 0;
dudmuck 2:fdae76e1215e 361 }
dudmuck 2:fdae76e1215e 362
dudmuck 2:fdae76e1215e 363 void SX127x_lora::setAgcAutoOn(bool on)
dudmuck 2:fdae76e1215e 364 {
dudmuck 2:fdae76e1215e 365 if (m_xcvr.type == SX1276) {
dudmuck 2:fdae76e1215e 366 RegModemConfig3.sx1276bits.AgcAutoOn = on;
dudmuck 2:fdae76e1215e 367 m_xcvr.write_reg(REG_LR_MODEMCONFIG3, RegModemConfig3.octet);
dudmuck 2:fdae76e1215e 368 } else if (m_xcvr.type == SX1272) {
dudmuck 2:fdae76e1215e 369 RegModemConfig2.sx1272bits.AgcAutoOn = on;
dudmuck 2:fdae76e1215e 370 m_xcvr.write_reg(REG_LR_MODEMCONFIG2, RegModemConfig2.octet);
dudmuck 2:fdae76e1215e 371 }
dudmuck 2:fdae76e1215e 372
dudmuck 2:fdae76e1215e 373 }
dudmuck 2:fdae76e1215e 374
dudmuck 2:fdae76e1215e 375 void SX127x_lora::start_tx(uint8_t len)
dudmuck 7:927a05f84ede 376 {
dudmuck 2:fdae76e1215e 377 // DIO0 to TxDone
dudmuck 2:fdae76e1215e 378 if (m_xcvr.RegDioMapping1.bits.Dio0Mapping != 1) {
dudmuck 2:fdae76e1215e 379 m_xcvr.RegDioMapping1.bits.Dio0Mapping = 1;
dudmuck 2:fdae76e1215e 380 m_xcvr.write_reg(REG_DIOMAPPING1, m_xcvr.RegDioMapping1.octet);
dudmuck 2:fdae76e1215e 381 }
dudmuck 2:fdae76e1215e 382
dudmuck 2:fdae76e1215e 383 // set FifoPtrAddr to FifoTxPtrBase
dudmuck 2:fdae76e1215e 384 m_xcvr.write_reg(REG_LR_FIFOADDRPTR, m_xcvr.read_reg(REG_LR_FIFOTXBASEADDR));
dudmuck 2:fdae76e1215e 385
dudmuck 2:fdae76e1215e 386 // write PayloadLength bytes to fifo
dudmuck 2:fdae76e1215e 387 write_fifo(len);
dudmuck 7:927a05f84ede 388
dudmuck 2:fdae76e1215e 389 m_xcvr.set_opmode(RF_OPMODE_TRANSMITTER);
dudmuck 2:fdae76e1215e 390 }
dudmuck 2:fdae76e1215e 391
dudmuck 2:fdae76e1215e 392 void SX127x_lora::start_rx()
dudmuck 2:fdae76e1215e 393 {
dudmuck 2:fdae76e1215e 394 if (!m_xcvr.RegOpMode.bits.LongRangeMode)
dudmuck 12:bda42457c34a 395 return; // fsk mode
dudmuck 12:bda42457c34a 396 if (m_xcvr.RegOpMode.sx1276LORAbits.AccessSharedReg)
dudmuck 12:bda42457c34a 397 return; // fsk page
dudmuck 13:1953e70522aa 398
dudmuck 13:1953e70522aa 399 m_xcvr.set_opmode(RF_OPMODE_RECEIVER);
dudmuck 2:fdae76e1215e 400
dudmuck 2:fdae76e1215e 401 if (m_xcvr.RegDioMapping1.bits.Dio0Mapping != 0) {
dudmuck 2:fdae76e1215e 402 m_xcvr.RegDioMapping1.bits.Dio0Mapping = 0; // DIO0 to RxDone
dudmuck 2:fdae76e1215e 403 m_xcvr.write_reg(REG_DIOMAPPING1, m_xcvr.RegDioMapping1.octet);
dudmuck 2:fdae76e1215e 404 }
dudmuck 2:fdae76e1215e 405
dudmuck 2:fdae76e1215e 406 m_xcvr.write_reg(REG_LR_FIFOADDRPTR, m_xcvr.read_reg(REG_LR_FIFORXBASEADDR));
dudmuck 2:fdae76e1215e 407 }
dudmuck 2:fdae76e1215e 408
dudmuck 2:fdae76e1215e 409 float SX127x_lora::get_pkt_rssi()
dudmuck 2:fdae76e1215e 410 {
dudmuck 2:fdae76e1215e 411 /* TODO: calculating with pktSNR to give meaningful result below noise floor */
dudmuck 2:fdae76e1215e 412 if (m_xcvr.type == SX1276)
dudmuck 2:fdae76e1215e 413 return RegPktRssiValue - 137;
dudmuck 2:fdae76e1215e 414 else
dudmuck 2:fdae76e1215e 415 return RegPktRssiValue - 125;
dudmuck 2:fdae76e1215e 416 }
dudmuck 2:fdae76e1215e 417
dudmuck 2:fdae76e1215e 418 service_action_e SX127x_lora::service()
dudmuck 2:fdae76e1215e 419 {
dudmuck 2:fdae76e1215e 420 if (m_xcvr.RegOpMode.bits.Mode == RF_OPMODE_RECEIVER) {
dudmuck 2:fdae76e1215e 421 if (poll_vh) {
dudmuck 2:fdae76e1215e 422 RegIrqFlags.octet = m_xcvr.read_reg(REG_LR_IRQFLAGS);
dudmuck 2:fdae76e1215e 423 if (RegIrqFlags.bits.ValidHeader) {
dudmuck 2:fdae76e1215e 424 RegIrqFlags.octet = 0;
dudmuck 2:fdae76e1215e 425 RegIrqFlags.bits.ValidHeader = 1;
dudmuck 2:fdae76e1215e 426 m_xcvr.write_reg(REG_LR_IRQFLAGS, RegIrqFlags.octet);
dudmuck 2:fdae76e1215e 427 printf("VH\r\n");
dudmuck 2:fdae76e1215e 428 }
dudmuck 2:fdae76e1215e 429 }
dudmuck 2:fdae76e1215e 430 }
dudmuck 7:927a05f84ede 431
dudmuck 2:fdae76e1215e 432 if (m_xcvr.dio0 == 0)
dudmuck 2:fdae76e1215e 433 return SERVICE_NONE;
dudmuck 2:fdae76e1215e 434
dudmuck 2:fdae76e1215e 435 switch (m_xcvr.RegDioMapping1.bits.Dio0Mapping) {
dudmuck 2:fdae76e1215e 436 case 0: // RxDone
dudmuck 2:fdae76e1215e 437 /* user checks for CRC error in IrqFlags */
dudmuck 2:fdae76e1215e 438 RegIrqFlags.octet = m_xcvr.read_reg(REG_LR_IRQFLAGS); // save flags
dudmuck 2:fdae76e1215e 439 RegHopChannel.octet = m_xcvr.read_reg(REG_LR_HOPCHANNEL);
dudmuck 2:fdae76e1215e 440 //printf("[%02x]", RegIrqFlags.octet);
dudmuck 2:fdae76e1215e 441 m_xcvr.write_reg(REG_LR_IRQFLAGS, RegIrqFlags.octet); // clear flags in radio
dudmuck 2:fdae76e1215e 442
dudmuck 2:fdae76e1215e 443 /* any register of interest on received packet is read(saved) here */
dudmuck 2:fdae76e1215e 444 RegModemStatus.octet = m_xcvr.read_reg(REG_LR_MODEMSTAT);
dudmuck 2:fdae76e1215e 445 RegPktSnrValue = m_xcvr.read_reg(REG_LR_PKTSNRVALUE);
dudmuck 2:fdae76e1215e 446 RegPktRssiValue = m_xcvr.read_reg(REG_LR_PKTRSSIVALUE);
dudmuck 2:fdae76e1215e 447 RegRxNbBytes = m_xcvr.read_reg(REG_LR_RXNBBYTES);
dudmuck 2:fdae76e1215e 448
dudmuck 2:fdae76e1215e 449 m_xcvr.write_reg(REG_LR_FIFOADDRPTR, m_xcvr.read_reg(REG_LR_FIFORXCURRENTADDR));
dudmuck 2:fdae76e1215e 450 read_fifo(RegRxNbBytes);
dudmuck 2:fdae76e1215e 451 return SERVICE_READ_FIFO;
dudmuck 2:fdae76e1215e 452 case 1: // TxDone
dudmuck 2:fdae76e1215e 453 RegIrqFlags.octet = 0;
dudmuck 2:fdae76e1215e 454 RegIrqFlags.bits.TxDone = 1;
dudmuck 2:fdae76e1215e 455 m_xcvr.write_reg(REG_LR_IRQFLAGS, RegIrqFlags.octet);
dudmuck 2:fdae76e1215e 456 return SERVICE_TX_DONE;
dudmuck 2:fdae76e1215e 457 } // ...switch (RegDioMapping1.bits.Dio0Mapping)
dudmuck 2:fdae76e1215e 458
dudmuck 2:fdae76e1215e 459 return SERVICE_ERROR;
dudmuck 12:bda42457c34a 460 }
dudmuck 12:bda42457c34a 461