raises pin at time instructed by received LoRa packet.
Dependencies: sx126x sx12xx_hal
radio chip selection
Radio chip driver is not included, allowing choice of radio device.
If you're using SX1272 or SX1276, then import sx127x driver into your program.
if you're using SX1261 or SX1262, then import sx126x driver into your program.
if you're using SX1280, then import sx1280 driver into your program.
If you're using NAmote72 or Murata discovery, then you must import only sx127x driver.
Transmitter side is at Alarm Slave project page.
Output is observed on nucleo morpho connector pins pin[A-D]
: see code for actual pins used.
main.cpp@3:f81d64ff0164, 2018-07-18 (annotated)
- Committer:
- Wayne Roberts
- Date:
- Wed Jul 18 18:50:19 2018 -0700
- Revision:
- 3:f81d64ff0164
- Parent:
- 2:bf201940a9db
use sx12xx_hal
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
Wayne Roberts |
3:f81d64ff0164 | 1 | #include "radio.h" |
dudmuck | 0:b6ec8db2edbf | 2 | |
dudmuck | 0:b6ec8db2edbf | 3 | DigitalOut myled(LED1); |
dudmuck | 2:bf201940a9db | 4 | |
Wayne Roberts |
3:f81d64ff0164 | 5 | #if defined(SX127x_H) || defined(SX126x_H) |
Wayne Roberts |
3:f81d64ff0164 | 6 | #define BW_KHZ 500 |
Wayne Roberts |
3:f81d64ff0164 | 7 | #define SPREADING_FACTOR 11 |
Wayne Roberts |
3:f81d64ff0164 | 8 | #define CF_HZ 910800000 |
Wayne Roberts |
3:f81d64ff0164 | 9 | #elif defined(SX128x_H) |
Wayne Roberts |
3:f81d64ff0164 | 10 | #define BW_KHZ 200 |
Wayne Roberts |
3:f81d64ff0164 | 11 | #define SPREADING_FACTOR 11 |
Wayne Roberts |
3:f81d64ff0164 | 12 | #define CF_HZ 2487000000 |
Wayne Roberts |
3:f81d64ff0164 | 13 | #endif |
Wayne Roberts |
3:f81d64ff0164 | 14 | |
Wayne Roberts |
3:f81d64ff0164 | 15 | #ifdef TARGET_DISCO_L072CZ_LRWAN1 |
dudmuck | 2:bf201940a9db | 16 | DigitalOut pinA(PB_12); |
dudmuck | 2:bf201940a9db | 17 | DigitalOut pinB(PB_13); |
dudmuck | 2:bf201940a9db | 18 | DigitalOut pinC(PB_14); |
dudmuck | 2:bf201940a9db | 19 | DigitalOut pinD(PB_15); |
dudmuck | 2:bf201940a9db | 20 | #else |
dudmuck | 2:bf201940a9db | 21 | DigitalOut pinA(PC_3); |
dudmuck | 2:bf201940a9db | 22 | DigitalOut pinB(PC_2); |
dudmuck | 2:bf201940a9db | 23 | DigitalOut pinC(PC_6); |
dudmuck | 2:bf201940a9db | 24 | DigitalOut pinD(PC_8); |
dudmuck | 2:bf201940a9db | 25 | #endif /* !TARGET_DISCO_L072CZ_LRWAN1 */ |
dudmuck | 2:bf201940a9db | 26 | |
dudmuck | 1:6a3a48d657a9 | 27 | DigitalOut* pin; |
dudmuck | 0:b6ec8db2edbf | 28 | Timeout to; |
dudmuck | 0:b6ec8db2edbf | 29 | |
dudmuck | 1:6a3a48d657a9 | 30 | #define PIN_ASSERT_us 500000 |
dudmuck | 1:6a3a48d657a9 | 31 | |
dudmuck | 2:bf201940a9db | 32 | #define CMD_PINA 0x02 |
dudmuck | 2:bf201940a9db | 33 | #define CMD_PINB 0x03 |
dudmuck | 2:bf201940a9db | 34 | #define CMD_PINC 0x06 |
dudmuck | 2:bf201940a9db | 35 | #define CMD_PIND 0x08 |
dudmuck | 0:b6ec8db2edbf | 36 | |
Wayne Roberts |
3:f81d64ff0164 | 37 | /**********************************************************************/ |
Wayne Roberts |
3:f81d64ff0164 | 38 | |
dudmuck | 0:b6ec8db2edbf | 39 | void alarm_pin_clr() |
dudmuck | 0:b6ec8db2edbf | 40 | { |
dudmuck | 1:6a3a48d657a9 | 41 | pin->write(0); |
dudmuck | 0:b6ec8db2edbf | 42 | } |
dudmuck | 0:b6ec8db2edbf | 43 | |
dudmuck | 0:b6ec8db2edbf | 44 | void alarm_pin_set() |
dudmuck | 0:b6ec8db2edbf | 45 | { |
dudmuck | 1:6a3a48d657a9 | 46 | pin->write(1); |
dudmuck | 0:b6ec8db2edbf | 47 | to.attach_us(&alarm_pin_clr, PIN_ASSERT_us); |
dudmuck | 0:b6ec8db2edbf | 48 | } |
dudmuck | 0:b6ec8db2edbf | 49 | |
dudmuck | 0:b6ec8db2edbf | 50 | static uint16_t crc_ccitt( uint8_t *buffer, uint16_t length ) |
dudmuck | 0:b6ec8db2edbf | 51 | { |
dudmuck | 0:b6ec8db2edbf | 52 | // The CRC calculation follows CCITT |
dudmuck | 0:b6ec8db2edbf | 53 | const uint16_t polynom = 0x1021; |
dudmuck | 0:b6ec8db2edbf | 54 | // CRC initial value |
dudmuck | 0:b6ec8db2edbf | 55 | uint16_t crc = 0x0000; |
dudmuck | 0:b6ec8db2edbf | 56 | |
dudmuck | 0:b6ec8db2edbf | 57 | if( buffer == NULL ) |
dudmuck | 0:b6ec8db2edbf | 58 | { |
dudmuck | 0:b6ec8db2edbf | 59 | return 0; |
dudmuck | 0:b6ec8db2edbf | 60 | } |
dudmuck | 0:b6ec8db2edbf | 61 | |
dudmuck | 0:b6ec8db2edbf | 62 | for( uint16_t i = 0; i < length; ++i ) |
dudmuck | 0:b6ec8db2edbf | 63 | { |
dudmuck | 0:b6ec8db2edbf | 64 | crc ^= ( uint16_t ) buffer[i] << 8; |
dudmuck | 0:b6ec8db2edbf | 65 | for( uint16_t j = 0; j < 8; ++j ) |
dudmuck | 0:b6ec8db2edbf | 66 | { |
dudmuck | 0:b6ec8db2edbf | 67 | crc = ( crc & 0x8000 ) ? ( crc << 1 ) ^ polynom : ( crc << 1 ); |
dudmuck | 0:b6ec8db2edbf | 68 | } |
dudmuck | 0:b6ec8db2edbf | 69 | } |
dudmuck | 0:b6ec8db2edbf | 70 | |
dudmuck | 0:b6ec8db2edbf | 71 | return crc; |
dudmuck | 0:b6ec8db2edbf | 72 | } |
dudmuck | 0:b6ec8db2edbf | 73 | |
dudmuck | 0:b6ec8db2edbf | 74 | void get_alarm() |
dudmuck | 0:b6ec8db2edbf | 75 | { |
Wayne Roberts |
3:f81d64ff0164 | 76 | uint16_t rx_crc, crc = crc_ccitt(Radio::radio.rx_buf, 5); |
Wayne Roberts |
3:f81d64ff0164 | 77 | rx_crc = Radio::radio.rx_buf[5]; |
dudmuck | 0:b6ec8db2edbf | 78 | rx_crc <<= 8; |
Wayne Roberts |
3:f81d64ff0164 | 79 | rx_crc += Radio::radio.rx_buf[6]; |
dudmuck | 0:b6ec8db2edbf | 80 | //printf("%u) crc rx:%04x, calc:%04x\r\n", lora.RegRxNbBytes, rx_crc, crc); |
dudmuck | 0:b6ec8db2edbf | 81 | if (crc == rx_crc) { |
Wayne Roberts |
3:f81d64ff0164 | 82 | uint8_t c = Radio::radio.rx_buf[0]; |
dudmuck | 2:bf201940a9db | 83 | if (c == CMD_PINA || c == CMD_PINB || c == CMD_PINC || c == CMD_PIND) { |
dudmuck | 0:b6ec8db2edbf | 84 | unsigned delay; |
Wayne Roberts |
3:f81d64ff0164 | 85 | delay = Radio::radio.rx_buf[1]; |
dudmuck | 0:b6ec8db2edbf | 86 | delay <<= 8; |
Wayne Roberts |
3:f81d64ff0164 | 87 | delay += Radio::radio.rx_buf[2]; |
dudmuck | 0:b6ec8db2edbf | 88 | delay <<= 8; |
Wayne Roberts |
3:f81d64ff0164 | 89 | delay += Radio::radio.rx_buf[3]; |
dudmuck | 0:b6ec8db2edbf | 90 | delay <<= 8; |
Wayne Roberts |
3:f81d64ff0164 | 91 | delay += Radio::radio.rx_buf[4]; |
dudmuck | 1:6a3a48d657a9 | 92 | switch (c) { |
dudmuck | 2:bf201940a9db | 93 | case CMD_PINA: pin = &pinA; break; |
dudmuck | 2:bf201940a9db | 94 | case CMD_PINB: pin = &pinB; break; |
dudmuck | 2:bf201940a9db | 95 | case CMD_PINC: pin = &pinC; break; |
dudmuck | 2:bf201940a9db | 96 | case CMD_PIND: pin = &pinD; break; |
dudmuck | 1:6a3a48d657a9 | 97 | } |
dudmuck | 0:b6ec8db2edbf | 98 | to.attach_us(&alarm_pin_set, delay); |
dudmuck | 0:b6ec8db2edbf | 99 | printf("delay:%u\r\n", delay); |
dudmuck | 0:b6ec8db2edbf | 100 | } else |
Wayne Roberts |
3:f81d64ff0164 | 101 | printf("cmd? %02x\r\n", Radio::radio.rx_buf[0]); |
dudmuck | 0:b6ec8db2edbf | 102 | } else |
dudmuck | 0:b6ec8db2edbf | 103 | printf("crc fail %04x, %04x\r\n", rx_crc, crc); |
dudmuck | 0:b6ec8db2edbf | 104 | } |
Wayne Roberts |
3:f81d64ff0164 | 105 | |
Wayne Roberts |
3:f81d64ff0164 | 106 | void txDoneCB() |
Wayne Roberts |
3:f81d64ff0164 | 107 | { |
Wayne Roberts |
3:f81d64ff0164 | 108 | } |
Wayne Roberts |
3:f81d64ff0164 | 109 | |
Wayne Roberts |
3:f81d64ff0164 | 110 | void rxDoneCB(uint8_t size, float Rssi, float Snr) |
Wayne Roberts |
3:f81d64ff0164 | 111 | { |
Wayne Roberts |
3:f81d64ff0164 | 112 | get_alarm(); |
Wayne Roberts |
3:f81d64ff0164 | 113 | printf("%.1fdBm snr:%.1fdB ", Rssi, Snr); |
Wayne Roberts |
3:f81d64ff0164 | 114 | } |
Wayne Roberts |
3:f81d64ff0164 | 115 | |
Wayne Roberts |
3:f81d64ff0164 | 116 | const RadioEvents_t rev = { |
Wayne Roberts |
3:f81d64ff0164 | 117 | /* Dio0_top_half */ NULL, |
Wayne Roberts |
3:f81d64ff0164 | 118 | /* TxDone_topHalf */ NULL, |
Wayne Roberts |
3:f81d64ff0164 | 119 | /* TxDone_botHalf */ txDoneCB, |
Wayne Roberts |
3:f81d64ff0164 | 120 | /* TxTimeout */ NULL, |
Wayne Roberts |
3:f81d64ff0164 | 121 | /* RxDone */ rxDoneCB, |
Wayne Roberts |
3:f81d64ff0164 | 122 | /* RxTimeout */ NULL, |
Wayne Roberts |
3:f81d64ff0164 | 123 | /* RxError */ NULL, |
Wayne Roberts |
3:f81d64ff0164 | 124 | /* FhssChangeChannel */NULL, |
Wayne Roberts |
3:f81d64ff0164 | 125 | /* CadDone */ NULL |
Wayne Roberts |
3:f81d64ff0164 | 126 | }; |
Wayne Roberts |
3:f81d64ff0164 | 127 | |
dudmuck | 0:b6ec8db2edbf | 128 | |
dudmuck | 0:b6ec8db2edbf | 129 | int main() |
dudmuck | 0:b6ec8db2edbf | 130 | { |
dudmuck | 0:b6ec8db2edbf | 131 | printf("\r\nreset-rx\r\n"); |
Wayne Roberts |
3:f81d64ff0164 | 132 | |
Wayne Roberts |
3:f81d64ff0164 | 133 | |
Wayne Roberts |
3:f81d64ff0164 | 134 | Radio::Init(&rev); |
Wayne Roberts |
3:f81d64ff0164 | 135 | |
Wayne Roberts |
3:f81d64ff0164 | 136 | Radio::Standby(); |
Wayne Roberts |
3:f81d64ff0164 | 137 | Radio::LoRaModemConfig(BW_KHZ, SPREADING_FACTOR, 1); |
Wayne Roberts |
3:f81d64ff0164 | 138 | Radio::LoRaPacketConfig(8, false, true, false); // preambleLen, fixLen, crcOn, invIQ |
Wayne Roberts |
3:f81d64ff0164 | 139 | Radio::SetChannel(CF_HZ); |
dudmuck | 0:b6ec8db2edbf | 140 | |
Wayne Roberts |
3:f81d64ff0164 | 141 | Radio::Rx(0); |
dudmuck | 0:b6ec8db2edbf | 142 | |
dudmuck | 0:b6ec8db2edbf | 143 | for (;;) { |
Wayne Roberts |
3:f81d64ff0164 | 144 | Radio::service(); |
dudmuck | 0:b6ec8db2edbf | 145 | } |
dudmuck | 0:b6ec8db2edbf | 146 | } |