driver for sx1280
Dependents: alarm_slave_extended_SX1280 alarm_master_extended_Vance_SX1280
sx1280.cpp@0:abb827c65ff5, 2018-06-28 (annotated)
- Committer:
- Wayne Roberts
- Date:
- Thu Jun 28 17:52:22 2018 -0700
- Revision:
- 0:abb827c65ff5
- Child:
- 2:8a442c3511ae
initial commit
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
Wayne Roberts |
0:abb827c65ff5 | 1 | #include "sx12xx.h" |
Wayne Roberts |
0:abb827c65ff5 | 2 | |
Wayne Roberts |
0:abb827c65ff5 | 3 | Callback<void()> SX128x::diox_topHalf; // low latency ISR context |
Wayne Roberts |
0:abb827c65ff5 | 4 | |
Wayne Roberts |
0:abb827c65ff5 | 5 | const float SX128x::timeOutStep[] = { 0.015625, 0.0625, 1, 4 }; |
Wayne Roberts |
0:abb827c65ff5 | 6 | |
Wayne Roberts |
0:abb827c65ff5 | 7 | void SX128x::dioxisr() |
Wayne Roberts |
0:abb827c65ff5 | 8 | { |
Wayne Roberts |
0:abb827c65ff5 | 9 | if (diox_topHalf) |
Wayne Roberts |
0:abb827c65ff5 | 10 | diox_topHalf.call(); |
Wayne Roberts |
0:abb827c65ff5 | 11 | } |
Wayne Roberts |
0:abb827c65ff5 | 12 | |
Wayne Roberts |
0:abb827c65ff5 | 13 | SX128x::SX128x(SPI& _spi, PinName _nss, PinName _busy, PinName _diox) |
Wayne Roberts |
0:abb827c65ff5 | 14 | : spi(_spi), nss(_nss), busy(_busy), diox(_diox) |
Wayne Roberts |
0:abb827c65ff5 | 15 | { |
Wayne Roberts |
0:abb827c65ff5 | 16 | nss = 1; |
Wayne Roberts |
0:abb827c65ff5 | 17 | |
Wayne Roberts |
0:abb827c65ff5 | 18 | diox.rise(dioxisr); |
Wayne Roberts |
0:abb827c65ff5 | 19 | |
Wayne Roberts |
0:abb827c65ff5 | 20 | if (busy) { |
Wayne Roberts |
0:abb827c65ff5 | 21 | /*status_t status; |
Wayne Roberts |
0:abb827c65ff5 | 22 | status.octet =*/ xfer(OPCODE_GET_STATUS, 0, 0, NULL); |
Wayne Roberts |
0:abb827c65ff5 | 23 | while (busy) |
Wayne Roberts |
0:abb827c65ff5 | 24 | ; |
Wayne Roberts |
0:abb827c65ff5 | 25 | } |
Wayne Roberts |
0:abb827c65ff5 | 26 | |
Wayne Roberts |
0:abb827c65ff5 | 27 | periodBase = 3; |
Wayne Roberts |
0:abb827c65ff5 | 28 | } |
Wayne Roberts |
0:abb827c65ff5 | 29 | |
Wayne Roberts |
0:abb827c65ff5 | 30 | uint8_t SX128x::xfer(uint8_t opcode, uint8_t wlen, uint8_t rlen, uint8_t* ptr) |
Wayne Roberts |
0:abb827c65ff5 | 31 | { |
Wayne Roberts |
0:abb827c65ff5 | 32 | const uint8_t* stopPtr; |
Wayne Roberts |
0:abb827c65ff5 | 33 | const uint8_t* wstop; |
Wayne Roberts |
0:abb827c65ff5 | 34 | const uint8_t* rstop; |
Wayne Roberts |
0:abb827c65ff5 | 35 | uint8_t nop = 0; |
Wayne Roberts |
0:abb827c65ff5 | 36 | uint8_t ret; |
Wayne Roberts |
0:abb827c65ff5 | 37 | |
Wayne Roberts |
0:abb827c65ff5 | 38 | if (opcode != OPCODE_GET_STATUS) { |
Wayne Roberts |
0:abb827c65ff5 | 39 | if (sleeping) { |
Wayne Roberts |
0:abb827c65ff5 | 40 | nss = 0; |
Wayne Roberts |
0:abb827c65ff5 | 41 | while (busy) |
Wayne Roberts |
0:abb827c65ff5 | 42 | ; |
Wayne Roberts |
0:abb827c65ff5 | 43 | sleeping = false; |
Wayne Roberts |
0:abb827c65ff5 | 44 | } else { |
Wayne Roberts |
0:abb827c65ff5 | 45 | while (busy) |
Wayne Roberts |
0:abb827c65ff5 | 46 | ; |
Wayne Roberts |
0:abb827c65ff5 | 47 | |
Wayne Roberts |
0:abb827c65ff5 | 48 | nss = 0; |
Wayne Roberts |
0:abb827c65ff5 | 49 | } |
Wayne Roberts |
0:abb827c65ff5 | 50 | } else |
Wayne Roberts |
0:abb827c65ff5 | 51 | nss = 0; |
Wayne Roberts |
0:abb827c65ff5 | 52 | |
Wayne Roberts |
0:abb827c65ff5 | 53 | ret = spi.write(opcode); |
Wayne Roberts |
0:abb827c65ff5 | 54 | |
Wayne Roberts |
0:abb827c65ff5 | 55 | wstop = ptr + wlen; |
Wayne Roberts |
0:abb827c65ff5 | 56 | rstop = ptr + rlen; |
Wayne Roberts |
0:abb827c65ff5 | 57 | if (rlen > wlen) |
Wayne Roberts |
0:abb827c65ff5 | 58 | stopPtr = rstop; |
Wayne Roberts |
0:abb827c65ff5 | 59 | else |
Wayne Roberts |
0:abb827c65ff5 | 60 | stopPtr = wstop; |
Wayne Roberts |
0:abb827c65ff5 | 61 | |
Wayne Roberts |
0:abb827c65ff5 | 62 | for (; ptr < stopPtr; ptr++) { |
Wayne Roberts |
0:abb827c65ff5 | 63 | if (ptr < wstop && ptr < rstop) |
Wayne Roberts |
0:abb827c65ff5 | 64 | *ptr = spi.write(*ptr); |
Wayne Roberts |
0:abb827c65ff5 | 65 | else if (ptr < wstop) |
Wayne Roberts |
0:abb827c65ff5 | 66 | spi.write(*ptr); |
Wayne Roberts |
0:abb827c65ff5 | 67 | else |
Wayne Roberts |
0:abb827c65ff5 | 68 | *ptr = spi.write(nop); // n >= write length: send NOP |
Wayne Roberts |
0:abb827c65ff5 | 69 | } |
Wayne Roberts |
0:abb827c65ff5 | 70 | |
Wayne Roberts |
0:abb827c65ff5 | 71 | nss = 1; |
Wayne Roberts |
0:abb827c65ff5 | 72 | |
Wayne Roberts |
0:abb827c65ff5 | 73 | if (opcode == OPCODE_SET_SLEEP) |
Wayne Roberts |
0:abb827c65ff5 | 74 | sleeping = true; |
Wayne Roberts |
0:abb827c65ff5 | 75 | |
Wayne Roberts |
0:abb827c65ff5 | 76 | return ret; |
Wayne Roberts |
0:abb827c65ff5 | 77 | } |
Wayne Roberts |
0:abb827c65ff5 | 78 | |
Wayne Roberts |
0:abb827c65ff5 | 79 | uint32_t SX128x::readReg(uint16_t addr, uint8_t len) |
Wayne Roberts |
0:abb827c65ff5 | 80 | { |
Wayne Roberts |
0:abb827c65ff5 | 81 | uint32_t ret = 0; |
Wayne Roberts |
0:abb827c65ff5 | 82 | unsigned i; |
Wayne Roberts |
0:abb827c65ff5 | 83 | |
Wayne Roberts |
0:abb827c65ff5 | 84 | uint8_t buf[7]; |
Wayne Roberts |
0:abb827c65ff5 | 85 | buf[0] = addr >> 8; |
Wayne Roberts |
0:abb827c65ff5 | 86 | buf[1] = (uint8_t)addr; |
Wayne Roberts |
0:abb827c65ff5 | 87 | xfer(OPCODE_READ_REGISTER, 2, 3+len, buf); |
Wayne Roberts |
0:abb827c65ff5 | 88 | for (i = 0; i < len; i++) { |
Wayne Roberts |
0:abb827c65ff5 | 89 | ret <<= 8; |
Wayne Roberts |
0:abb827c65ff5 | 90 | ret |= buf[i+3]; |
Wayne Roberts |
0:abb827c65ff5 | 91 | } |
Wayne Roberts |
0:abb827c65ff5 | 92 | return ret; |
Wayne Roberts |
0:abb827c65ff5 | 93 | } |
Wayne Roberts |
0:abb827c65ff5 | 94 | |
Wayne Roberts |
0:abb827c65ff5 | 95 | void SX128x::start_tx(uint8_t pktLen, float timeout_ms) |
Wayne Roberts |
0:abb827c65ff5 | 96 | { |
Wayne Roberts |
0:abb827c65ff5 | 97 | IrqFlags_t irqEnable; |
Wayne Roberts |
0:abb827c65ff5 | 98 | uint8_t buf[8]; |
Wayne Roberts |
0:abb827c65ff5 | 99 | |
Wayne Roberts |
0:abb827c65ff5 | 100 | irqEnable.word = 0; |
Wayne Roberts |
0:abb827c65ff5 | 101 | irqEnable.bits.TxDone = 1; |
Wayne Roberts |
0:abb827c65ff5 | 102 | irqEnable.bits.RxTxTimeout = 1; |
Wayne Roberts |
0:abb827c65ff5 | 103 | |
Wayne Roberts |
0:abb827c65ff5 | 104 | buf[0] = irqEnable.word >> 8; // enable bits |
Wayne Roberts |
0:abb827c65ff5 | 105 | buf[1] = irqEnable.word; // enable bits |
Wayne Roberts |
0:abb827c65ff5 | 106 | buf[2] = irqEnable.word >> 8; // dio1 |
Wayne Roberts |
0:abb827c65ff5 | 107 | buf[3] = irqEnable.word; // dio1 |
Wayne Roberts |
0:abb827c65ff5 | 108 | buf[4] = 0; // dio2 |
Wayne Roberts |
0:abb827c65ff5 | 109 | buf[5] = 0; // dio2 |
Wayne Roberts |
0:abb827c65ff5 | 110 | buf[6] = 0; // dio3 |
Wayne Roberts |
0:abb827c65ff5 | 111 | buf[7] = 0; // dio3 |
Wayne Roberts |
0:abb827c65ff5 | 112 | xfer(OPCODE_SET_DIO_IRQ_PARAMS, 8, 0, buf); |
Wayne Roberts |
0:abb827c65ff5 | 113 | |
Wayne Roberts |
0:abb827c65ff5 | 114 | { |
Wayne Roberts |
0:abb827c65ff5 | 115 | uint8_t i; |
Wayne Roberts |
0:abb827c65ff5 | 116 | |
Wayne Roberts |
0:abb827c65ff5 | 117 | while (busy) |
Wayne Roberts |
0:abb827c65ff5 | 118 | ; |
Wayne Roberts |
0:abb827c65ff5 | 119 | |
Wayne Roberts |
0:abb827c65ff5 | 120 | nss = 0; |
Wayne Roberts |
0:abb827c65ff5 | 121 | spi.write(OPCODE_WRITE_BUFFER); |
Wayne Roberts |
0:abb827c65ff5 | 122 | spi.write(0); // offset |
Wayne Roberts |
0:abb827c65ff5 | 123 | i = 0; |
Wayne Roberts |
0:abb827c65ff5 | 124 | for (i = 0; i < pktLen; i++) { |
Wayne Roberts |
0:abb827c65ff5 | 125 | spi.write(tx_buf[i]); |
Wayne Roberts |
0:abb827c65ff5 | 126 | } |
Wayne Roberts |
0:abb827c65ff5 | 127 | nss = 1; |
Wayne Roberts |
0:abb827c65ff5 | 128 | } |
Wayne Roberts |
0:abb827c65ff5 | 129 | |
Wayne Roberts |
0:abb827c65ff5 | 130 | buf[0] = 3; |
Wayne Roberts |
0:abb827c65ff5 | 131 | if (timeout_ms > 0) { |
Wayne Roberts |
0:abb827c65ff5 | 132 | unsigned t_o = timeout_ms / timeOutStep[periodBase]; |
Wayne Roberts |
0:abb827c65ff5 | 133 | buf[1] = t_o >> 8; |
Wayne Roberts |
0:abb827c65ff5 | 134 | buf[2] = t_o; |
Wayne Roberts |
0:abb827c65ff5 | 135 | } else { |
Wayne Roberts |
0:abb827c65ff5 | 136 | /* no timeout */ |
Wayne Roberts |
0:abb827c65ff5 | 137 | buf[1] = 0; |
Wayne Roberts |
0:abb827c65ff5 | 138 | buf[2] = 0; |
Wayne Roberts |
0:abb827c65ff5 | 139 | } |
Wayne Roberts |
0:abb827c65ff5 | 140 | xfer(OPCODE_SET_TX, 3, 0, buf); |
Wayne Roberts |
0:abb827c65ff5 | 141 | |
Wayne Roberts |
0:abb827c65ff5 | 142 | chipMode = CHIPMODE_TX; |
Wayne Roberts |
0:abb827c65ff5 | 143 | if (chipModeChange) |
Wayne Roberts |
0:abb827c65ff5 | 144 | chipModeChange.call(); |
Wayne Roberts |
0:abb827c65ff5 | 145 | } |
Wayne Roberts |
0:abb827c65ff5 | 146 | |
Wayne Roberts |
0:abb827c65ff5 | 147 | void SX128x::hw_reset(PinName pin) |
Wayne Roberts |
0:abb827c65ff5 | 148 | { |
Wayne Roberts |
0:abb827c65ff5 | 149 | DigitalInOut nrst(pin); |
Wayne Roberts |
0:abb827c65ff5 | 150 | nrst.output(); |
Wayne Roberts |
0:abb827c65ff5 | 151 | nrst = 0; |
Wayne Roberts |
0:abb827c65ff5 | 152 | wait_us(100); |
Wayne Roberts |
0:abb827c65ff5 | 153 | nrst = 1; |
Wayne Roberts |
0:abb827c65ff5 | 154 | nrst.mode(PullUp); |
Wayne Roberts |
0:abb827c65ff5 | 155 | nrst.input(); |
Wayne Roberts |
0:abb827c65ff5 | 156 | |
Wayne Roberts |
0:abb827c65ff5 | 157 | while (busy) |
Wayne Roberts |
0:abb827c65ff5 | 158 | ; |
Wayne Roberts |
0:abb827c65ff5 | 159 | } |
Wayne Roberts |
0:abb827c65ff5 | 160 | |
Wayne Roberts |
0:abb827c65ff5 | 161 | uint64_t SX128x::getSyncAddr(uint8_t num) |
Wayne Roberts |
0:abb827c65ff5 | 162 | { |
Wayne Roberts |
0:abb827c65ff5 | 163 | uint64_t ret; |
Wayne Roberts |
0:abb827c65ff5 | 164 | unsigned regAdr = REG_ADDR_PKT_SYNC_ADRS_1 + ((num-1) * 5); |
Wayne Roberts |
0:abb827c65ff5 | 165 | ret = readReg(regAdr, 1); |
Wayne Roberts |
0:abb827c65ff5 | 166 | ret <<= 32; |
Wayne Roberts |
0:abb827c65ff5 | 167 | ret |= readReg(regAdr+1, 4); |
Wayne Roberts |
0:abb827c65ff5 | 168 | return ret; |
Wayne Roberts |
0:abb827c65ff5 | 169 | } |
Wayne Roberts |
0:abb827c65ff5 | 170 | |
Wayne Roberts |
0:abb827c65ff5 | 171 | void SX128x::setSyncAddr(uint8_t num, uint64_t sa) |
Wayne Roberts |
0:abb827c65ff5 | 172 | { |
Wayne Roberts |
0:abb827c65ff5 | 173 | unsigned regAdr = REG_ADDR_PKT_SYNC_ADRS_1 + ((num-1) * 5); |
Wayne Roberts |
0:abb827c65ff5 | 174 | writeReg(regAdr+1, sa & 0xffffffff, 4); |
Wayne Roberts |
0:abb827c65ff5 | 175 | sa >>= 32; |
Wayne Roberts |
0:abb827c65ff5 | 176 | writeReg(regAdr, sa & 0xff, 1); |
Wayne Roberts |
0:abb827c65ff5 | 177 | } |
Wayne Roberts |
0:abb827c65ff5 | 178 | |
Wayne Roberts |
0:abb827c65ff5 | 179 | void SX128x::set_tx_dbm(int8_t dbm) |
Wayne Roberts |
0:abb827c65ff5 | 180 | { |
Wayne Roberts |
0:abb827c65ff5 | 181 | uint8_t buf[2]; |
Wayne Roberts |
0:abb827c65ff5 | 182 | |
Wayne Roberts |
0:abb827c65ff5 | 183 | buf[0] = dbm; |
Wayne Roberts |
0:abb827c65ff5 | 184 | buf[1] = RADIO_RAMP_20_US; |
Wayne Roberts |
0:abb827c65ff5 | 185 | xfer(OPCODE_SET_TX_PARAMS, 2, 0, buf); |
Wayne Roberts |
0:abb827c65ff5 | 186 | } |
Wayne Roberts |
0:abb827c65ff5 | 187 | |
Wayne Roberts |
0:abb827c65ff5 | 188 | void SX128x::setMHz(float MHz) |
Wayne Roberts |
0:abb827c65ff5 | 189 | { |
Wayne Roberts |
0:abb827c65ff5 | 190 | unsigned frf = MHz / PLL_STEP_MHZ; |
Wayne Roberts |
0:abb827c65ff5 | 191 | uint8_t buf[3]; |
Wayne Roberts |
0:abb827c65ff5 | 192 | |
Wayne Roberts |
0:abb827c65ff5 | 193 | buf[0] = frf >> 16; |
Wayne Roberts |
0:abb827c65ff5 | 194 | buf[1] = frf >> 8; |
Wayne Roberts |
0:abb827c65ff5 | 195 | buf[2] = frf; |
Wayne Roberts |
0:abb827c65ff5 | 196 | xfer(OPCODE_SET_RF_FREQUENCY, 3, 0, buf); |
Wayne Roberts |
0:abb827c65ff5 | 197 | } |
Wayne Roberts |
0:abb827c65ff5 | 198 | |
Wayne Roberts |
0:abb827c65ff5 | 199 | float SX128x::getMHz() |
Wayne Roberts |
0:abb827c65ff5 | 200 | { |
Wayne Roberts |
0:abb827c65ff5 | 201 | uint32_t frf = readReg(REG_ADDR_RFFREQ, 3); |
Wayne Roberts |
0:abb827c65ff5 | 202 | return frf * PLL_STEP_MHZ; |
Wayne Roberts |
0:abb827c65ff5 | 203 | } |
Wayne Roberts |
0:abb827c65ff5 | 204 | |
Wayne Roberts |
0:abb827c65ff5 | 205 | void SX128x::setStandby(stby_t stby) |
Wayne Roberts |
0:abb827c65ff5 | 206 | { |
Wayne Roberts |
0:abb827c65ff5 | 207 | uint8_t octet = stby; |
Wayne Roberts |
0:abb827c65ff5 | 208 | xfer(OPCODE_SET_STANDBY, 1, 0, &octet); |
Wayne Roberts |
0:abb827c65ff5 | 209 | |
Wayne Roberts |
0:abb827c65ff5 | 210 | chipMode = CHIPMODE_NONE; |
Wayne Roberts |
0:abb827c65ff5 | 211 | if (chipModeChange) |
Wayne Roberts |
0:abb827c65ff5 | 212 | chipModeChange.call(); |
Wayne Roberts |
0:abb827c65ff5 | 213 | } |
Wayne Roberts |
0:abb827c65ff5 | 214 | |
Wayne Roberts |
0:abb827c65ff5 | 215 | void SX128x::setFS() |
Wayne Roberts |
0:abb827c65ff5 | 216 | { |
Wayne Roberts |
0:abb827c65ff5 | 217 | xfer(OPCODE_SET_FS, 0, 0, NULL); |
Wayne Roberts |
0:abb827c65ff5 | 218 | |
Wayne Roberts |
0:abb827c65ff5 | 219 | chipMode = CHIPMODE_NONE; |
Wayne Roberts |
0:abb827c65ff5 | 220 | if (chipModeChange) |
Wayne Roberts |
0:abb827c65ff5 | 221 | chipModeChange.call(); |
Wayne Roberts |
0:abb827c65ff5 | 222 | } |
Wayne Roberts |
0:abb827c65ff5 | 223 | |
Wayne Roberts |
0:abb827c65ff5 | 224 | void SX128x::setSleep(bool warmStart) |
Wayne Roberts |
0:abb827c65ff5 | 225 | { |
Wayne Roberts |
0:abb827c65ff5 | 226 | sleepConfig_t sc; |
Wayne Roberts |
0:abb827c65ff5 | 227 | |
Wayne Roberts |
0:abb827c65ff5 | 228 | sc.octet = 0; |
Wayne Roberts |
0:abb827c65ff5 | 229 | sc.retentionBits.dataRAM = warmStart; |
Wayne Roberts |
0:abb827c65ff5 | 230 | sc.retentionBits.dataBuffer = warmStart; |
Wayne Roberts |
0:abb827c65ff5 | 231 | sc.retentionBits.instructionRAM = warmStart; |
Wayne Roberts |
0:abb827c65ff5 | 232 | xfer(OPCODE_SET_SLEEP, 1, 0, &sc.octet); |
Wayne Roberts |
0:abb827c65ff5 | 233 | |
Wayne Roberts |
0:abb827c65ff5 | 234 | chipMode = CHIPMODE_NONE; |
Wayne Roberts |
0:abb827c65ff5 | 235 | if (chipModeChange) |
Wayne Roberts |
0:abb827c65ff5 | 236 | chipModeChange.call(); |
Wayne Roberts |
0:abb827c65ff5 | 237 | } |
Wayne Roberts |
0:abb827c65ff5 | 238 | |
Wayne Roberts |
0:abb827c65ff5 | 239 | uint8_t SX128x::getPacketType() |
Wayne Roberts |
0:abb827c65ff5 | 240 | { |
Wayne Roberts |
0:abb827c65ff5 | 241 | uint8_t buf[2]; |
Wayne Roberts |
0:abb827c65ff5 | 242 | |
Wayne Roberts |
0:abb827c65ff5 | 243 | xfer(OPCODE_GET_PACKET_TYPE, 0, 2, buf); |
Wayne Roberts |
0:abb827c65ff5 | 244 | |
Wayne Roberts |
0:abb827c65ff5 | 245 | return buf[1]; |
Wayne Roberts |
0:abb827c65ff5 | 246 | } |
Wayne Roberts |
0:abb827c65ff5 | 247 | |
Wayne Roberts |
0:abb827c65ff5 | 248 | void SX128x::setPacketType(uint8_t type) |
Wayne Roberts |
0:abb827c65ff5 | 249 | { |
Wayne Roberts |
0:abb827c65ff5 | 250 | xfer(OPCODE_SET_PACKET_TYPE, 1, 0, &type); |
Wayne Roberts |
0:abb827c65ff5 | 251 | } |
Wayne Roberts |
0:abb827c65ff5 | 252 | |
Wayne Roberts |
0:abb827c65ff5 | 253 | void SX128x::setBufferBase(uint8_t txAddr, uint8_t rxAddr) |
Wayne Roberts |
0:abb827c65ff5 | 254 | { |
Wayne Roberts |
0:abb827c65ff5 | 255 | uint8_t buf[2]; |
Wayne Roberts |
0:abb827c65ff5 | 256 | |
Wayne Roberts |
0:abb827c65ff5 | 257 | buf[0] = txAddr; // TX base address |
Wayne Roberts |
0:abb827c65ff5 | 258 | buf[1] = rxAddr; // RX base address |
Wayne Roberts |
0:abb827c65ff5 | 259 | xfer(OPCODE_SET_BUFFER_BASE_ADDR, 2, 0, buf); |
Wayne Roberts |
0:abb827c65ff5 | 260 | } |
Wayne Roberts |
0:abb827c65ff5 | 261 | |
Wayne Roberts |
0:abb827c65ff5 | 262 | void SX128x::setRegulator(uint8_t rmp) |
Wayne Roberts |
0:abb827c65ff5 | 263 | { |
Wayne Roberts |
0:abb827c65ff5 | 264 | xfer(OPCODE_SET_REGULATOR_MODE, 1, 0, &rmp); |
Wayne Roberts |
0:abb827c65ff5 | 265 | } |
Wayne Roberts |
0:abb827c65ff5 | 266 | |
Wayne Roberts |
0:abb827c65ff5 | 267 | void SX128x::start_rx(float timeout_ms) |
Wayne Roberts |
0:abb827c65ff5 | 268 | { |
Wayne Roberts |
0:abb827c65ff5 | 269 | IrqFlags_t irqEnable; |
Wayne Roberts |
0:abb827c65ff5 | 270 | uint8_t buf[8]; |
Wayne Roberts |
0:abb827c65ff5 | 271 | unsigned t_o; |
Wayne Roberts |
0:abb827c65ff5 | 272 | |
Wayne Roberts |
0:abb827c65ff5 | 273 | irqEnable.word = 0; |
Wayne Roberts |
0:abb827c65ff5 | 274 | irqEnable.bits.RxDone = 1; |
Wayne Roberts |
0:abb827c65ff5 | 275 | irqEnable.bits.RxTxTimeout = 1; |
Wayne Roberts |
0:abb827c65ff5 | 276 | |
Wayne Roberts |
0:abb827c65ff5 | 277 | buf[0] = irqEnable.word >> 8; // enable bits |
Wayne Roberts |
0:abb827c65ff5 | 278 | buf[1] = irqEnable.word; // enable bits |
Wayne Roberts |
0:abb827c65ff5 | 279 | buf[2] = irqEnable.word >> 8; // dio1 |
Wayne Roberts |
0:abb827c65ff5 | 280 | buf[3] = irqEnable.word; // dio1 |
Wayne Roberts |
0:abb827c65ff5 | 281 | buf[4] = 0; // dio2 |
Wayne Roberts |
0:abb827c65ff5 | 282 | buf[5] = 0; // dio2 |
Wayne Roberts |
0:abb827c65ff5 | 283 | buf[6] = 0; // dio3 |
Wayne Roberts |
0:abb827c65ff5 | 284 | buf[7] = 0; // dio3 |
Wayne Roberts |
0:abb827c65ff5 | 285 | xfer(OPCODE_SET_DIO_IRQ_PARAMS, 8, 0, buf); |
Wayne Roberts |
0:abb827c65ff5 | 286 | |
Wayne Roberts |
0:abb827c65ff5 | 287 | buf[0] = periodBase; |
Wayne Roberts |
0:abb827c65ff5 | 288 | if (timeout_ms > 0) { |
Wayne Roberts |
0:abb827c65ff5 | 289 | t_o = timeout_ms / timeOutStep[periodBase]; |
Wayne Roberts |
0:abb827c65ff5 | 290 | buf[1] = t_o >> 8; |
Wayne Roberts |
0:abb827c65ff5 | 291 | buf[2] = t_o; |
Wayne Roberts |
0:abb827c65ff5 | 292 | } else { |
Wayne Roberts |
0:abb827c65ff5 | 293 | /* receive packets forever */ |
Wayne Roberts |
0:abb827c65ff5 | 294 | buf[1] = 0xff; |
Wayne Roberts |
0:abb827c65ff5 | 295 | buf[2] = 0xff; |
Wayne Roberts |
0:abb827c65ff5 | 296 | } |
Wayne Roberts |
0:abb827c65ff5 | 297 | xfer(OPCODE_SET_RX, 3, 0, buf); |
Wayne Roberts |
0:abb827c65ff5 | 298 | |
Wayne Roberts |
0:abb827c65ff5 | 299 | chipMode = CHIPMODE_RX; |
Wayne Roberts |
0:abb827c65ff5 | 300 | if (chipModeChange) { |
Wayne Roberts |
0:abb827c65ff5 | 301 | chipModeChange.call(); |
Wayne Roberts |
0:abb827c65ff5 | 302 | } |
Wayne Roberts |
0:abb827c65ff5 | 303 | } |
Wayne Roberts |
0:abb827c65ff5 | 304 | |
Wayne Roberts |
0:abb827c65ff5 | 305 | void SX128x::service() |
Wayne Roberts |
0:abb827c65ff5 | 306 | { |
Wayne Roberts |
0:abb827c65ff5 | 307 | IrqFlags_t irqFlags, clearIrqFlags; |
Wayne Roberts |
0:abb827c65ff5 | 308 | uint8_t buf[6]; |
Wayne Roberts |
0:abb827c65ff5 | 309 | pktStatus_t pktStatus; |
Wayne Roberts |
0:abb827c65ff5 | 310 | |
Wayne Roberts |
0:abb827c65ff5 | 311 | if (busy) { |
Wayne Roberts |
0:abb827c65ff5 | 312 | return; |
Wayne Roberts |
0:abb827c65ff5 | 313 | } |
Wayne Roberts |
0:abb827c65ff5 | 314 | |
Wayne Roberts |
0:abb827c65ff5 | 315 | while (diox) { |
Wayne Roberts |
0:abb827c65ff5 | 316 | xfer(OPCODE_GET_IRQ_STATUS, 0, 3, buf); |
Wayne Roberts |
0:abb827c65ff5 | 317 | irqFlags.word = buf[1] << 8; |
Wayne Roberts |
0:abb827c65ff5 | 318 | irqFlags.word |= buf[2]; |
Wayne Roberts |
0:abb827c65ff5 | 319 | clearIrqFlags.word = 0; |
Wayne Roberts |
0:abb827c65ff5 | 320 | if (irqFlags.bits.TxDone) { |
Wayne Roberts |
0:abb827c65ff5 | 321 | if (txDone) |
Wayne Roberts |
0:abb827c65ff5 | 322 | txDone.call(); |
Wayne Roberts |
0:abb827c65ff5 | 323 | clearIrqFlags.bits.TxDone = 1; |
Wayne Roberts |
0:abb827c65ff5 | 324 | chipMode = CHIPMODE_NONE; |
Wayne Roberts |
0:abb827c65ff5 | 325 | if (chipModeChange) |
Wayne Roberts |
0:abb827c65ff5 | 326 | chipModeChange.call(); |
Wayne Roberts |
0:abb827c65ff5 | 327 | } |
Wayne Roberts |
0:abb827c65ff5 | 328 | if (irqFlags.bits.RxDone) { |
Wayne Roberts |
0:abb827c65ff5 | 329 | if (rxDone) { |
Wayne Roberts |
0:abb827c65ff5 | 330 | uint8_t len; |
Wayne Roberts |
0:abb827c65ff5 | 331 | xfer(OPCODE_GET_RX_BUFFER_STATUS, 0, 3, buf); |
Wayne Roberts |
0:abb827c65ff5 | 332 | if (buf[1] == 0) |
Wayne Roberts |
0:abb827c65ff5 | 333 | len = readReg(REG_ADDR_LORA_TX_PAYLOAD_LENGTH, 1); // lora implicit |
Wayne Roberts |
0:abb827c65ff5 | 334 | else |
Wayne Roberts |
0:abb827c65ff5 | 335 | len = buf[1]; |
Wayne Roberts |
0:abb827c65ff5 | 336 | |
Wayne Roberts |
0:abb827c65ff5 | 337 | ReadBuffer(len, buf[2]); |
Wayne Roberts |
0:abb827c65ff5 | 338 | xfer(OPCODE_GET_PACKET_STATUS, 0, 6, pktStatus.buf); |
Wayne Roberts |
0:abb827c65ff5 | 339 | rxDone(len, &pktStatus); |
Wayne Roberts |
0:abb827c65ff5 | 340 | } |
Wayne Roberts |
0:abb827c65ff5 | 341 | clearIrqFlags.bits.RxDone = 1; |
Wayne Roberts |
0:abb827c65ff5 | 342 | } |
Wayne Roberts |
0:abb827c65ff5 | 343 | if (irqFlags.bits.RxTxTimeout) { |
Wayne Roberts |
0:abb827c65ff5 | 344 | if (chipMode != CHIPMODE_NONE) { |
Wayne Roberts |
0:abb827c65ff5 | 345 | if (timeout) |
Wayne Roberts |
0:abb827c65ff5 | 346 | timeout(chipMode == CHIPMODE_TX); |
Wayne Roberts |
0:abb827c65ff5 | 347 | } |
Wayne Roberts |
0:abb827c65ff5 | 348 | chipMode = CHIPMODE_NONE; |
Wayne Roberts |
0:abb827c65ff5 | 349 | if (chipModeChange) |
Wayne Roberts |
0:abb827c65ff5 | 350 | chipModeChange.call(); |
Wayne Roberts |
0:abb827c65ff5 | 351 | clearIrqFlags.bits.RxTxTimeout = 1; |
Wayne Roberts |
0:abb827c65ff5 | 352 | } |
Wayne Roberts |
0:abb827c65ff5 | 353 | |
Wayne Roberts |
0:abb827c65ff5 | 354 | if (clearIrqFlags.word != 0) { |
Wayne Roberts |
0:abb827c65ff5 | 355 | buf[0] = clearIrqFlags.word >> 8; |
Wayne Roberts |
0:abb827c65ff5 | 356 | buf[1] = (uint8_t)clearIrqFlags.word; |
Wayne Roberts |
0:abb827c65ff5 | 357 | xfer(OPCODE_CLEAR_IRQ_STATUS, 2, 0, buf); |
Wayne Roberts |
0:abb827c65ff5 | 358 | } |
Wayne Roberts |
0:abb827c65ff5 | 359 | |
Wayne Roberts |
0:abb827c65ff5 | 360 | } // ...while (diox) |
Wayne Roberts |
0:abb827c65ff5 | 361 | |
Wayne Roberts |
0:abb827c65ff5 | 362 | } // ..service() |
Wayne Roberts |
0:abb827c65ff5 | 363 | |
Wayne Roberts |
0:abb827c65ff5 | 364 | void SX128x::writeReg(uint16_t addr, uint32_t data, uint8_t len) |
Wayne Roberts |
0:abb827c65ff5 | 365 | { |
Wayne Roberts |
0:abb827c65ff5 | 366 | uint8_t buf[6]; |
Wayne Roberts |
0:abb827c65ff5 | 367 | uint8_t n; |
Wayne Roberts |
0:abb827c65ff5 | 368 | buf[0] = addr >> 8; |
Wayne Roberts |
0:abb827c65ff5 | 369 | buf[1] = (uint8_t)addr; |
Wayne Roberts |
0:abb827c65ff5 | 370 | for (n = len; n > 0; n--) { |
Wayne Roberts |
0:abb827c65ff5 | 371 | buf[n+1] = (uint8_t)data; |
Wayne Roberts |
0:abb827c65ff5 | 372 | data >>= 8; |
Wayne Roberts |
0:abb827c65ff5 | 373 | } |
Wayne Roberts |
0:abb827c65ff5 | 374 | xfer(OPCODE_WRITE_REGISTER, 2+len, 2+len, buf); |
Wayne Roberts |
0:abb827c65ff5 | 375 | } |
Wayne Roberts |
0:abb827c65ff5 | 376 | |
Wayne Roberts |
0:abb827c65ff5 | 377 | void SX128x::ReadBuffer(uint8_t size, uint8_t offset) |
Wayne Roberts |
0:abb827c65ff5 | 378 | { |
Wayne Roberts |
0:abb827c65ff5 | 379 | unsigned i; |
Wayne Roberts |
0:abb827c65ff5 | 380 | while (busy) |
Wayne Roberts |
0:abb827c65ff5 | 381 | ; |
Wayne Roberts |
0:abb827c65ff5 | 382 | |
Wayne Roberts |
0:abb827c65ff5 | 383 | nss = 0; |
Wayne Roberts |
0:abb827c65ff5 | 384 | |
Wayne Roberts |
0:abb827c65ff5 | 385 | spi.write(OPCODE_READ_BUFFER); |
Wayne Roberts |
0:abb827c65ff5 | 386 | spi.write(offset); |
Wayne Roberts |
0:abb827c65ff5 | 387 | spi.write(0); // NOP |
Wayne Roberts |
0:abb827c65ff5 | 388 | i = 0; |
Wayne Roberts |
0:abb827c65ff5 | 389 | for (i = 0; i < size; i++) { |
Wayne Roberts |
0:abb827c65ff5 | 390 | rx_buf[i] = spi.write(0); |
Wayne Roberts |
0:abb827c65ff5 | 391 | } |
Wayne Roberts |
0:abb827c65ff5 | 392 | |
Wayne Roberts |
0:abb827c65ff5 | 393 | nss = 1; |
Wayne Roberts |
0:abb827c65ff5 | 394 | } |
Wayne Roberts |
0:abb827c65ff5 | 395 |