Ilya Krylov / SX127x1

123

sx127x_fsk.cpp@12:bda42457c34a, 2015-04-13 (annotated)

Committer:
dudmuck
Date:
Mon Apr 13 23:00:14 2015 +0000
Revision:
12:bda42457c34a
Parent:
8:c9592cbc9f86
Child:
21:b4ba73b59bb4
fsk.enable: add option for fast mode switch

Who changed what in which revision?

UserRevisionLine numberNew contents of line
dudmuck 2:fdae76e1215e 1 #include "sx127x_fsk.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 3:3bf2515b1eed 18
dudmuck 3:3bf2515b1eed 19 SX127x_fsk::SX127x_fsk(SX127x& r) : m_xcvr(r)
dudmuck 2:fdae76e1215e 20 {
dudmuck 2:fdae76e1215e 21 }
dudmuck 2:fdae76e1215e 22
dudmuck 2:fdae76e1215e 23 SX127x_fsk::~SX127x_fsk()
dudmuck 2:fdae76e1215e 24 {
dudmuck 2:fdae76e1215e 25 }
dudmuck 2:fdae76e1215e 26
dudmuck 2:fdae76e1215e 27 void SX127x_fsk::write_fifo(uint8_t len)
dudmuck 2:fdae76e1215e 28 {
dudmuck 2:fdae76e1215e 29 int i;
dudmuck 2:fdae76e1215e 30
dudmuck 2:fdae76e1215e 31 m_xcvr.m_cs = 0;
dudmuck 2:fdae76e1215e 32 m_xcvr.m_spi.write(REG_FIFO | 0x80); // bit7 is high for writing to radio
dudmuck 2:fdae76e1215e 33
dudmuck 3:3bf2515b1eed 34 if (!m_xcvr.RegOpMode.bits.LongRangeMode && RegPktConfig1.bits.PacketFormatVariable) {
dudmuck 2:fdae76e1215e 35 m_xcvr.m_spi.write(len);
dudmuck 3:3bf2515b1eed 36 }
dudmuck 2:fdae76e1215e 37
dudmuck 2:fdae76e1215e 38 for (i = 0; i < len; i++) {
dudmuck 2:fdae76e1215e 39 m_xcvr.m_spi.write(m_xcvr.tx_buf[i]);
dudmuck 2:fdae76e1215e 40 }
dudmuck 2:fdae76e1215e 41 m_xcvr.m_cs = 1;
dudmuck 2:fdae76e1215e 42 }
dudmuck 2:fdae76e1215e 43
dudmuck 12:bda42457c34a 44 void SX127x_fsk::enable(bool fast)
dudmuck 2:fdae76e1215e 45 {
dudmuck 2:fdae76e1215e 46 m_xcvr.set_opmode(RF_OPMODE_SLEEP);
dudmuck 2:fdae76e1215e 47
dudmuck 2:fdae76e1215e 48 m_xcvr.RegOpMode.bits.LongRangeMode = 0;
dudmuck 2:fdae76e1215e 49 m_xcvr.write_reg(REG_OPMODE, m_xcvr.RegOpMode.octet);
dudmuck 12:bda42457c34a 50 if (fast)
dudmuck 12:bda42457c34a 51 return;
dudmuck 2:fdae76e1215e 52
dudmuck 2:fdae76e1215e 53 RegPktConfig1.octet = m_xcvr.read_reg(REG_FSK_PACKETCONFIG1);
dudmuck 2:fdae76e1215e 54 RegPktConfig2.word = m_xcvr.read_u16(REG_FSK_PACKETCONFIG2);
dudmuck 12:bda42457c34a 55 RegRxConfig.octet = m_xcvr.read_reg(REG_FSK_RXCONFIG);
dudmuck 3:3bf2515b1eed 56 RegPreambleDetect.octet = m_xcvr.read_reg(REG_FSK_PREAMBLEDETECT);
dudmuck 3:3bf2515b1eed 57 RegSyncConfig.octet = m_xcvr.read_reg(REG_FSK_SYNCCONFIG);
dudmuck 3:3bf2515b1eed 58 RegFifoThreshold.octet = m_xcvr.read_reg(REG_FSK_FIFOTHRESH);
dudmuck 3:3bf2515b1eed 59 RegAfcFei.octet = m_xcvr.read_reg(REG_FSK_AFCFEI);
dudmuck 3:3bf2515b1eed 60
dudmuck 3:3bf2515b1eed 61 if (!RegFifoThreshold.bits.TxStartCondition) {
dudmuck 3:3bf2515b1eed 62 RegFifoThreshold.bits.TxStartCondition = 1; // start TX on fifoEmpty==0
dudmuck 3:3bf2515b1eed 63 m_xcvr.write_reg(REG_FSK_FIFOTHRESH, RegFifoThreshold.octet);
dudmuck 3:3bf2515b1eed 64 }
dudmuck 3:3bf2515b1eed 65
dudmuck 3:3bf2515b1eed 66 if (RegSyncConfig.bits.AutoRestartRxMode != 1) {
dudmuck 3:3bf2515b1eed 67 RegSyncConfig.bits.AutoRestartRxMode = 1;
dudmuck 3:3bf2515b1eed 68 m_xcvr.write_reg(REG_FSK_SYNCCONFIG, RegSyncConfig.octet);
dudmuck 3:3bf2515b1eed 69 }
dudmuck 3:3bf2515b1eed 70
dudmuck 3:3bf2515b1eed 71 if (RegPreambleDetect.bits.PreambleDetectorTol != 10) {
dudmuck 3:3bf2515b1eed 72 RegPreambleDetect.bits.PreambleDetectorTol = 10;
dudmuck 3:3bf2515b1eed 73 m_xcvr.write_reg(REG_FSK_PREAMBLEDETECT, RegPreambleDetect.octet);
dudmuck 3:3bf2515b1eed 74 }
dudmuck 2:fdae76e1215e 75
dudmuck 2:fdae76e1215e 76 m_xcvr.set_opmode(RF_OPMODE_STANDBY);
dudmuck 2:fdae76e1215e 77 }
dudmuck 2:fdae76e1215e 78
dudmuck 4:d987ac2836bf 79 void SX127x_fsk::init()
dudmuck 4:d987ac2836bf 80 {
dudmuck 4:d987ac2836bf 81 m_xcvr.set_opmode(RF_OPMODE_STANDBY);
dudmuck 4:d987ac2836bf 82
dudmuck 4:d987ac2836bf 83 RegRxConfig.bits.RxTrigger = 6; // have RX restart (trigger) on preamble detection
dudmuck 4:d987ac2836bf 84 RegRxConfig.bits.AfcAutoOn = 1; // have AFC performed on RX restart (RX trigger)
dudmuck 4:d987ac2836bf 85 m_xcvr.write_reg(REG_FSK_RXCONFIG, RegRxConfig.octet);
dudmuck 4:d987ac2836bf 86
dudmuck 4:d987ac2836bf 87 RegPreambleDetect.bits.PreambleDetectorOn = 1; // enable preamble detector
dudmuck 4:d987ac2836bf 88 m_xcvr.write_reg(REG_FSK_PREAMBLEDETECT, RegPreambleDetect.octet);
dudmuck 4:d987ac2836bf 89
dudmuck 4:d987ac2836bf 90 m_xcvr.write_reg(REG_FSK_SYNCVALUE1, 0x55);
dudmuck 4:d987ac2836bf 91 m_xcvr.write_reg(REG_FSK_SYNCVALUE2, 0x6f);
dudmuck 4:d987ac2836bf 92 m_xcvr.write_reg(REG_FSK_SYNCVALUE3, 0x4e);
dudmuck 4:d987ac2836bf 93 RegSyncConfig.bits.SyncSize = 2;
dudmuck 4:d987ac2836bf 94 m_xcvr.write_reg(REG_FSK_SYNCCONFIG, RegSyncConfig.octet);
dudmuck 4:d987ac2836bf 95
dudmuck 4:d987ac2836bf 96 // in case these were changed from default:
dudmuck 4:d987ac2836bf 97 set_bitrate(4800);
dudmuck 4:d987ac2836bf 98 set_tx_fdev_hz(5050);
dudmuck 4:d987ac2836bf 99 set_rx_dcc_bw_hz(10500, 0); // rxbw
dudmuck 4:d987ac2836bf 100 set_rx_dcc_bw_hz(50000, 1); // afcbw
dudmuck 4:d987ac2836bf 101 }
dudmuck 4:d987ac2836bf 102
dudmuck 4:d987ac2836bf 103 uint32_t SX127x_fsk::get_bitrate()
dudmuck 4:d987ac2836bf 104 {
dudmuck 4:d987ac2836bf 105 uint16_t br = m_xcvr.read_u16(REG_FSK_BITRATEMSB);
dudmuck 4:d987ac2836bf 106
dudmuck 4:d987ac2836bf 107 if (br == 0)
dudmuck 4:d987ac2836bf 108 return 0;
dudmuck 4:d987ac2836bf 109 else
dudmuck 4:d987ac2836bf 110 return XTAL_FREQ / br;
dudmuck 4:d987ac2836bf 111 }
dudmuck 4:d987ac2836bf 112
dudmuck 4:d987ac2836bf 113 void SX127x_fsk::set_bitrate(uint32_t bps)
dudmuck 4:d987ac2836bf 114 {
dudmuck 4:d987ac2836bf 115 uint16_t tmpBitrate = XTAL_FREQ / bps;
dudmuck 4:d987ac2836bf 116 //printf("tmpBitrate:%d = %d / %d\r\n", tmpBitrate, XTAL_FREQ, bps);
dudmuck 4:d987ac2836bf 117 m_xcvr.write_u16(REG_FSK_BITRATEMSB, tmpBitrate);
dudmuck 4:d987ac2836bf 118 }
dudmuck 4:d987ac2836bf 119
dudmuck 4:d987ac2836bf 120 void SX127x_fsk::set_tx_fdev_hz(uint32_t hz)
dudmuck 4:d987ac2836bf 121 {
dudmuck 4:d987ac2836bf 122 float tmpFdev = hz / FREQ_STEP_HZ;
dudmuck 4:d987ac2836bf 123 uint16_t v;
dudmuck 4:d987ac2836bf 124 //printf("tmpFdev:%f = %d / %f\r\n", tmpFdev, hz, FREQ_STEP_HZ);
dudmuck 4:d987ac2836bf 125 v = (uint16_t)tmpFdev;
dudmuck 4:d987ac2836bf 126 m_xcvr.write_u16(REG_FSK_FDEVMSB, v);
dudmuck 4:d987ac2836bf 127 }
dudmuck 4:d987ac2836bf 128
dudmuck 4:d987ac2836bf 129 uint32_t SX127x_fsk::get_tx_fdev_hz(void)
dudmuck 4:d987ac2836bf 130 {
dudmuck 4:d987ac2836bf 131 uint16_t fdev = m_xcvr.read_u16(REG_FSK_FDEVMSB);
dudmuck 4:d987ac2836bf 132 return fdev * FREQ_STEP_HZ;
dudmuck 4:d987ac2836bf 133 }
dudmuck 4:d987ac2836bf 134
dudmuck 2:fdae76e1215e 135 uint32_t SX127x_fsk::ComputeRxBw( uint8_t mantisse, uint8_t exponent )
dudmuck 2:fdae76e1215e 136 {
dudmuck 2:fdae76e1215e 137 // rxBw
dudmuck 2:fdae76e1215e 138 if (m_xcvr.RegOpMode.bits.ModulationType == 0)
dudmuck 2:fdae76e1215e 139 return XTAL_FREQ / (mantisse * (1 << (exponent+2)));
dudmuck 2:fdae76e1215e 140 else
dudmuck 2:fdae76e1215e 141 return XTAL_FREQ / (mantisse * (1 << (exponent+3)));
dudmuck 2:fdae76e1215e 142 }
dudmuck 2:fdae76e1215e 143
dudmuck 2:fdae76e1215e 144
dudmuck 2:fdae76e1215e 145 void SX127x_fsk::ComputeRxBwMantExp( uint32_t rxBwValue, uint8_t* mantisse, uint8_t* exponent )
dudmuck 2:fdae76e1215e 146 {
dudmuck 2:fdae76e1215e 147 uint8_t tmpExp, tmpMant;
dudmuck 2:fdae76e1215e 148 double tmpRxBw;
dudmuck 2:fdae76e1215e 149 double rxBwMin = 10e6;
dudmuck 2:fdae76e1215e 150
dudmuck 2:fdae76e1215e 151 for( tmpExp = 0; tmpExp < 8; tmpExp++ ) {
dudmuck 2:fdae76e1215e 152 for( tmpMant = 16; tmpMant <= 24; tmpMant += 4 ) {
dudmuck 2:fdae76e1215e 153 tmpRxBw = ComputeRxBw(tmpMant, tmpExp);
dudmuck 2:fdae76e1215e 154 if( fabs( tmpRxBw - rxBwValue ) < rxBwMin ) {
dudmuck 2:fdae76e1215e 155 rxBwMin = fabs( tmpRxBw - rxBwValue );
dudmuck 2:fdae76e1215e 156 *mantisse = tmpMant;
dudmuck 2:fdae76e1215e 157 *exponent = tmpExp;
dudmuck 2:fdae76e1215e 158 }
dudmuck 2:fdae76e1215e 159 }
dudmuck 2:fdae76e1215e 160 }
dudmuck 2:fdae76e1215e 161 }
dudmuck 2:fdae76e1215e 162
dudmuck 2:fdae76e1215e 163
dudmuck 2:fdae76e1215e 164 uint32_t SX127x_fsk::get_rx_bw_hz(uint8_t addr)
dudmuck 2:fdae76e1215e 165 {
dudmuck 3:3bf2515b1eed 166 RegRxBw_t reg_bw;
dudmuck 2:fdae76e1215e 167 uint8_t mantissa;
dudmuck 2:fdae76e1215e 168
dudmuck 2:fdae76e1215e 169 if (m_xcvr.RegOpMode.bits.LongRangeMode)
dudmuck 2:fdae76e1215e 170 return 0;
dudmuck 2:fdae76e1215e 171
dudmuck 2:fdae76e1215e 172 reg_bw.octet = m_xcvr.read_reg(addr);
dudmuck 2:fdae76e1215e 173 switch (reg_bw.bits.Mantissa) {
dudmuck 2:fdae76e1215e 174 case 0: mantissa = 16; break;
dudmuck 2:fdae76e1215e 175 case 1: mantissa = 20; break;
dudmuck 2:fdae76e1215e 176 case 2: mantissa = 24; break;
dudmuck 2:fdae76e1215e 177 default: mantissa = 0; break;
dudmuck 2:fdae76e1215e 178 }
dudmuck 2:fdae76e1215e 179
dudmuck 2:fdae76e1215e 180 if (addr == REG_FSK_RXBW)
dudmuck 2:fdae76e1215e 181 RegRxBw.octet = reg_bw.octet;
dudmuck 2:fdae76e1215e 182 else if (addr == REG_FSK_AFCBW)
dudmuck 2:fdae76e1215e 183 RegAfcBw.octet = reg_bw.octet;
dudmuck 2:fdae76e1215e 184
dudmuck 2:fdae76e1215e 185 return ComputeRxBw(mantissa, reg_bw.bits.Exponent);
dudmuck 2:fdae76e1215e 186 }
dudmuck 2:fdae76e1215e 187
dudmuck 2:fdae76e1215e 188
dudmuck 2:fdae76e1215e 189 void SX127x_fsk::set_rx_dcc_bw_hz(uint32_t bw_hz, char afc)
dudmuck 2:fdae76e1215e 190 {
dudmuck 2:fdae76e1215e 191 uint8_t mantisse = 0;
dudmuck 2:fdae76e1215e 192 uint8_t exponent = 0;
dudmuck 2:fdae76e1215e 193
dudmuck 2:fdae76e1215e 194 if (m_xcvr.RegOpMode.bits.LongRangeMode)
dudmuck 2:fdae76e1215e 195 return;
dudmuck 2:fdae76e1215e 196
dudmuck 2:fdae76e1215e 197 ComputeRxBwMantExp( bw_hz, &mantisse, &exponent );
dudmuck 2:fdae76e1215e 198 //printf("bw_hz:%d, mantisse:%d, exponent:%d\n", bw_hz, mantisse, exponent );
dudmuck 2:fdae76e1215e 199 switch( mantisse ) {
dudmuck 2:fdae76e1215e 200 case 16:
dudmuck 2:fdae76e1215e 201 RegRxBw.bits.Mantissa = 0;
dudmuck 2:fdae76e1215e 202 break;
dudmuck 2:fdae76e1215e 203 case 20:
dudmuck 2:fdae76e1215e 204 RegRxBw.bits.Mantissa = 1;
dudmuck 2:fdae76e1215e 205 break;
dudmuck 2:fdae76e1215e 206 case 24:
dudmuck 2:fdae76e1215e 207 RegRxBw.bits.Mantissa = 2;
dudmuck 2:fdae76e1215e 208 break;
dudmuck 2:fdae76e1215e 209 default:
dudmuck 2:fdae76e1215e 210 // Something went terribely wrong
dudmuck 2:fdae76e1215e 211 printf("maintisse:%d\n", mantisse);
dudmuck 2:fdae76e1215e 212 break;
dudmuck 2:fdae76e1215e 213 }
dudmuck 2:fdae76e1215e 214 RegRxBw.bits.Exponent = exponent;
dudmuck 2:fdae76e1215e 215
dudmuck 2:fdae76e1215e 216 if (afc)
dudmuck 2:fdae76e1215e 217 m_xcvr.write_reg(REG_FSK_AFCBW, RegRxBw.octet);
dudmuck 2:fdae76e1215e 218 else
dudmuck 2:fdae76e1215e 219 m_xcvr.write_reg(REG_FSK_RXBW, RegRxBw.octet);
dudmuck 2:fdae76e1215e 220 }
dudmuck 2:fdae76e1215e 221
dudmuck 2:fdae76e1215e 222
dudmuck 2:fdae76e1215e 223 void SX127x_fsk::start_tx(uint16_t arg_len)
dudmuck 2:fdae76e1215e 224 {
dudmuck 2:fdae76e1215e 225 uint16_t pkt_buf_len;
dudmuck 3:3bf2515b1eed 226 RegIrqFlags2_t RegIrqFlags2;
dudmuck 2:fdae76e1215e 227 int maxlen = FSK_FIFO_SIZE-1;
dudmuck 2:fdae76e1215e 228
dudmuck 2:fdae76e1215e 229 if (m_xcvr.RegOpMode.bits.Mode == RF_OPMODE_RECEIVER) {
dudmuck 2:fdae76e1215e 230 m_xcvr.set_opmode(RF_OPMODE_STANDBY);
dudmuck 2:fdae76e1215e 231 }
dudmuck 2:fdae76e1215e 232
dudmuck 2:fdae76e1215e 233 if (m_xcvr.RegDioMapping1.bits.Dio0Mapping != 0) {
dudmuck 2:fdae76e1215e 234 m_xcvr.RegDioMapping1.bits.Dio0Mapping = 0;
dudmuck 2:fdae76e1215e 235 m_xcvr.write_reg(REG_DIOMAPPING1, m_xcvr.RegDioMapping1.octet);
dudmuck 2:fdae76e1215e 236 }
dudmuck 2:fdae76e1215e 237
dudmuck 2:fdae76e1215e 238 if (RegPktConfig1.bits.PacketFormatVariable) {
dudmuck 2:fdae76e1215e 239 pkt_buf_len = arg_len;
dudmuck 2:fdae76e1215e 240 } else {
dudmuck 2:fdae76e1215e 241 pkt_buf_len = RegPktConfig2.bits.PayloadLength;
dudmuck 2:fdae76e1215e 242 printf("fixed-fmt %d\r\n", pkt_buf_len);
dudmuck 2:fdae76e1215e 243 }
dudmuck 2:fdae76e1215e 244
dudmuck 2:fdae76e1215e 245 RegIrqFlags2.octet = m_xcvr.read_reg(REG_FSK_IRQFLAGS2);
dudmuck 2:fdae76e1215e 246 if (RegIrqFlags2.bits.FifoEmpty) {
dudmuck 2:fdae76e1215e 247 if (RegPktConfig1.bits.PacketFormatVariable) {
dudmuck 2:fdae76e1215e 248 --maxlen; // space for length byte
dudmuck 2:fdae76e1215e 249 if (pkt_buf_len > maxlen) {
dudmuck 2:fdae76e1215e 250 /*setup_FifoLevel(FALLING_EDGE);
dudmuck 2:fdae76e1215e 251 radio_write_fifo_(pkt_buf, maxlen, pkt_buf_len);
dudmuck 2:fdae76e1215e 252 remaining_ = pkt_buf_len - maxlen;
dudmuck 2:fdae76e1215e 253 printf("var-oversized %d R=%d\r\n", pkt_buf_len, remaining_);*/
dudmuck 2:fdae76e1215e 254 printf("var-oversized %d\r\n", pkt_buf_len);
dudmuck 2:fdae76e1215e 255 } else {
dudmuck 8:c9592cbc9f86 256 //setup_FifoLevel(NO_EDGE); // disable
dudmuck 2:fdae76e1215e 257 write_fifo(pkt_buf_len);
dudmuck 2:fdae76e1215e 258 //remaining_ = 0; // all was sent
dudmuck 2:fdae76e1215e 259 }
dudmuck 2:fdae76e1215e 260 } else { // fixed-length pkt format...
dudmuck 2:fdae76e1215e 261 pkt_buf_len = RegPktConfig2.bits.PayloadLength;
dudmuck 2:fdae76e1215e 262 if (RegPktConfig2.bits.PayloadLength > maxlen) {
dudmuck 2:fdae76e1215e 263 /*setup_FifoLevel(FALLING_EDGE);
dudmuck 2:fdae76e1215e 264 radio_write_fifo_(pkt_buf, maxlen, -1);
dudmuck 2:fdae76e1215e 265 remaining_ = SX1272FSK->RegPktConfig2.bits.PayloadLength - maxlen;*/
dudmuck 2:fdae76e1215e 266 printf("todo: fsk large packet\r\n");
dudmuck 2:fdae76e1215e 267 } else {
dudmuck 2:fdae76e1215e 268 //setup_FifoLevel(NO_EDGE); // disable
dudmuck 2:fdae76e1215e 269 printf("fixed-write-fifo %d\r\n", RegPktConfig2.bits.PayloadLength);
dudmuck 2:fdae76e1215e 270 write_fifo(RegPktConfig2.bits.PayloadLength);
dudmuck 2:fdae76e1215e 271 }
dudmuck 2:fdae76e1215e 272 }
dudmuck 2:fdae76e1215e 273 } else
dudmuck 2:fdae76e1215e 274 printf("fifo not empty %02x\r\n", RegIrqFlags2.octet);
dudmuck 2:fdae76e1215e 275
dudmuck 2:fdae76e1215e 276 m_xcvr.set_opmode(RF_OPMODE_TRANSMITTER);
dudmuck 2:fdae76e1215e 277
dudmuck 2:fdae76e1215e 278 }
dudmuck 2:fdae76e1215e 279
dudmuck 3:3bf2515b1eed 280 void SX127x_fsk::config_dio0_for_pktmode_rx()
dudmuck 3:3bf2515b1eed 281 {
dudmuck 3:3bf2515b1eed 282 if (RegPktConfig1.bits.CrcOn) {
dudmuck 3:3bf2515b1eed 283 if (m_xcvr.RegDioMapping1.bits.Dio0Mapping != 1) {
dudmuck 3:3bf2515b1eed 284 m_xcvr.RegDioMapping1.bits.Dio0Mapping = 1; // to CrcOk
dudmuck 3:3bf2515b1eed 285 m_xcvr.write_reg(REG_DIOMAPPING1, m_xcvr.RegDioMapping1.octet);
dudmuck 3:3bf2515b1eed 286 }
dudmuck 3:3bf2515b1eed 287 } else { // Crc Off, use PayloadReady
dudmuck 3:3bf2515b1eed 288 if (m_xcvr.RegDioMapping1.bits.Dio0Mapping != 0) {
dudmuck 3:3bf2515b1eed 289 m_xcvr.RegDioMapping1.bits.Dio0Mapping = 0; // to PayloadReady
dudmuck 3:3bf2515b1eed 290 m_xcvr.write_reg(REG_DIOMAPPING1, m_xcvr.RegDioMapping1.octet);
dudmuck 3:3bf2515b1eed 291 }
dudmuck 3:3bf2515b1eed 292 }
dudmuck 3:3bf2515b1eed 293 }
dudmuck 2:fdae76e1215e 294
dudmuck 2:fdae76e1215e 295 void SX127x_fsk::start_rx()
dudmuck 2:fdae76e1215e 296 {
dudmuck 2:fdae76e1215e 297 if (m_xcvr.RegOpMode.bits.LongRangeMode)
dudmuck 2:fdae76e1215e 298 return;
dudmuck 2:fdae76e1215e 299
dudmuck 2:fdae76e1215e 300 if (m_xcvr.RegOpMode.bits.Mode == RF_OPMODE_RECEIVER) {
dudmuck 2:fdae76e1215e 301 // was already receiving, restart it
dudmuck 2:fdae76e1215e 302 m_xcvr.set_opmode(RF_OPMODE_STANDBY);
dudmuck 2:fdae76e1215e 303 wait(0.01);
dudmuck 2:fdae76e1215e 304 }
dudmuck 3:3bf2515b1eed 305
dudmuck 3:3bf2515b1eed 306 config_dio0_for_pktmode_rx();
dudmuck 3:3bf2515b1eed 307
dudmuck 2:fdae76e1215e 308 m_xcvr.set_opmode(RF_OPMODE_RECEIVER);
dudmuck 2:fdae76e1215e 309 }
dudmuck 2:fdae76e1215e 310
dudmuck 2:fdae76e1215e 311 service_action_e SX127x_fsk::service()
dudmuck 2:fdae76e1215e 312 {
dudmuck 2:fdae76e1215e 313 int i;
dudmuck 2:fdae76e1215e 314
dudmuck 2:fdae76e1215e 315 if (m_xcvr.RegOpMode.bits.Mode == RF_OPMODE_TRANSMITTER) {
dudmuck 2:fdae76e1215e 316 if (m_xcvr.dio0) {
dudmuck 2:fdae76e1215e 317 m_xcvr.set_opmode(RF_OPMODE_STANDBY);
dudmuck 2:fdae76e1215e 318 return SERVICE_TX_DONE;
dudmuck 2:fdae76e1215e 319 }
dudmuck 3:3bf2515b1eed 320 } else if (m_xcvr.RegOpMode.bits.Mode == RF_OPMODE_RECEIVER && m_xcvr.dio0) {
dudmuck 3:3bf2515b1eed 321 if (RegRxConfig.bits.AfcAutoOn)
dudmuck 3:3bf2515b1eed 322 RegAfcValue = m_xcvr.read_s16(REG_FSK_AFCMSB);
dudmuck 3:3bf2515b1eed 323
dudmuck 2:fdae76e1215e 324 if (RegPktConfig1.bits.PacketFormatVariable) {
dudmuck 3:3bf2515b1eed 325 rx_buf_length = m_xcvr.read_reg(REG_FIFO);
dudmuck 2:fdae76e1215e 326 } else {
dudmuck 3:3bf2515b1eed 327 rx_buf_length = RegPktConfig2.bits.PayloadLength;
dudmuck 2:fdae76e1215e 328 }
dudmuck 2:fdae76e1215e 329
dudmuck 2:fdae76e1215e 330 m_xcvr.m_cs = 0;
dudmuck 2:fdae76e1215e 331 m_xcvr.m_spi.write(REG_FIFO); // bit7 is low for reading from radio
dudmuck 3:3bf2515b1eed 332 for (i = 0; i < rx_buf_length; i++) {
dudmuck 2:fdae76e1215e 333 m_xcvr.rx_buf[i] = m_xcvr.m_spi.write(0);
dudmuck 2:fdae76e1215e 334 }
dudmuck 2:fdae76e1215e 335 m_xcvr.m_cs = 1;
dudmuck 2:fdae76e1215e 336 return SERVICE_READ_FIFO;
dudmuck 2:fdae76e1215e 337 }
dudmuck 2:fdae76e1215e 338
dudmuck 2:fdae76e1215e 339 return SERVICE_NONE;
dudmuck 2:fdae76e1215e 340 }