
Alarm generator, transmitter side
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.
This is transmitter project; Receiver side is Alarm Slave project.
This project generates alarm (transmits) from grounding certain pins.
To find the actual pins used, refer to the code where pin[A-D]
is declared as DigitalIn
.
Alarm message is sent N times with future timestamp indicating when alarm is to occur. This accommodates dropped packets, resulting in alarm occurring when as few as 1 packet is received.
main.cpp@7:ccb3088ce5be, 2018-07-18 (annotated)
- Committer:
- Wayne Roberts
- Date:
- Wed Jul 18 18:52:35 2018 -0700
- Revision:
- 7:ccb3088ce5be
- Parent:
- 6:59ba1113b3c6
use sx12xx_hal
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
Wayne Roberts |
7:ccb3088ce5be | 1 | //#include "user_platform.h" |
Wayne Roberts |
7:ccb3088ce5be | 2 | #include "radio.h" |
Wayne Roberts |
7:ccb3088ce5be | 3 | |
Wayne Roberts |
7:ccb3088ce5be | 4 | #if defined(SX127x_H) || defined(SX126x_H) |
Wayne Roberts |
7:ccb3088ce5be | 5 | #define BW_KHZ 500 |
Wayne Roberts |
7:ccb3088ce5be | 6 | #define SPREADING_FACTOR 11 |
Wayne Roberts |
7:ccb3088ce5be | 7 | #define CF_HZ 910800000 |
Wayne Roberts |
7:ccb3088ce5be | 8 | #if defined(SX126x_H) |
Wayne Roberts |
7:ccb3088ce5be | 9 | #define TX_DBM (Radio::chipType == CHIP_TYPE_SX1262 ? 20 : 14) |
Wayne Roberts |
7:ccb3088ce5be | 10 | #else |
Wayne Roberts |
7:ccb3088ce5be | 11 | #define TX_DBM 17 |
Wayne Roberts |
7:ccb3088ce5be | 12 | #endif |
Wayne Roberts |
7:ccb3088ce5be | 13 | #elif defined(SX128x_H) |
Wayne Roberts |
7:ccb3088ce5be | 14 | #define BW_KHZ 200 |
Wayne Roberts |
7:ccb3088ce5be | 15 | #define SPREADING_FACTOR 11 |
Wayne Roberts |
7:ccb3088ce5be | 16 | #define CF_HZ 2487000000 |
Wayne Roberts |
7:ccb3088ce5be | 17 | |
Wayne Roberts |
7:ccb3088ce5be | 18 | #define TX_DBM 5 |
Wayne Roberts |
7:ccb3088ce5be | 19 | #endif |
Wayne Roberts |
7:ccb3088ce5be | 20 | |
Wayne Roberts |
7:ccb3088ce5be | 21 | #ifdef TARGET_DISCO_L072CZ_LRWAN1 |
Wayne Roberts |
7:ccb3088ce5be | 22 | DigitalIn pinA(PB_12); |
Wayne Roberts |
7:ccb3088ce5be | 23 | DigitalIn pinB(PB_13); |
Wayne Roberts |
7:ccb3088ce5be | 24 | DigitalIn pinC(PB_14); |
Wayne Roberts |
7:ccb3088ce5be | 25 | DigitalIn pinD(PB_15); |
Wayne Roberts |
7:ccb3088ce5be | 26 | #elif defined(TARGET_FF_MORPHO) |
Wayne Roberts |
7:ccb3088ce5be | 27 | DigitalIn pinA(PC_3); |
Wayne Roberts |
7:ccb3088ce5be | 28 | DigitalIn pinB(PC_2); |
Wayne Roberts |
7:ccb3088ce5be | 29 | DigitalIn pinC(PC_6); |
Wayne Roberts |
7:ccb3088ce5be | 30 | DigitalIn pinD(PC_8); |
Wayne Roberts |
7:ccb3088ce5be | 31 | #endif |
Wayne Roberts |
7:ccb3088ce5be | 32 | |
Wayne Roberts |
7:ccb3088ce5be | 33 | volatile struct _f_ { |
Wayne Roberts |
7:ccb3088ce5be | 34 | uint8_t enable_pin_A : 1; |
Wayne Roberts |
7:ccb3088ce5be | 35 | uint8_t enable_pin_B : 1; |
Wayne Roberts |
7:ccb3088ce5be | 36 | uint8_t enable_pin_C : 1; |
Wayne Roberts |
7:ccb3088ce5be | 37 | uint8_t enable_pin_D : 1; |
Wayne Roberts |
7:ccb3088ce5be | 38 | } flags; |
dudmuck | 0:cb38da4f4b04 | 39 | |
dudmuck | 0:cb38da4f4b04 | 40 | Timer t; |
dudmuck | 3:d8b57eca8c45 | 41 | #define CMD_PINA 0x02 |
dudmuck | 3:d8b57eca8c45 | 42 | #define CMD_PINB 0x03 |
dudmuck | 3:d8b57eca8c45 | 43 | #define CMD_PINC 0x06 |
dudmuck | 3:d8b57eca8c45 | 44 | #define CMD_PIND 0x08 |
dudmuck | 0:cb38da4f4b04 | 45 | |
Wayne Roberts |
7:ccb3088ce5be | 46 | volatile bool tx_done; |
Wayne Roberts |
7:ccb3088ce5be | 47 | |
dudmuck | 0:cb38da4f4b04 | 48 | static uint16_t crc_ccitt( uint8_t *buffer, uint16_t length ) |
dudmuck | 0:cb38da4f4b04 | 49 | { |
dudmuck | 0:cb38da4f4b04 | 50 | // The CRC calculation follows CCITT |
dudmuck | 0:cb38da4f4b04 | 51 | const uint16_t polynom = 0x1021; |
dudmuck | 0:cb38da4f4b04 | 52 | // CRC initial value |
dudmuck | 0:cb38da4f4b04 | 53 | uint16_t crc = 0x0000; |
dudmuck | 0:cb38da4f4b04 | 54 | |
dudmuck | 0:cb38da4f4b04 | 55 | if( buffer == NULL ) |
dudmuck | 0:cb38da4f4b04 | 56 | { |
dudmuck | 0:cb38da4f4b04 | 57 | return 0; |
dudmuck | 0:cb38da4f4b04 | 58 | } |
dudmuck | 0:cb38da4f4b04 | 59 | |
dudmuck | 0:cb38da4f4b04 | 60 | for( uint16_t i = 0; i < length; ++i ) |
dudmuck | 0:cb38da4f4b04 | 61 | { |
dudmuck | 0:cb38da4f4b04 | 62 | crc ^= ( uint16_t ) buffer[i] << 8; |
dudmuck | 0:cb38da4f4b04 | 63 | for( uint16_t j = 0; j < 8; ++j ) |
dudmuck | 0:cb38da4f4b04 | 64 | { |
dudmuck | 0:cb38da4f4b04 | 65 | crc = ( crc & 0x8000 ) ? ( crc << 1 ) ^ polynom : ( crc << 1 ); |
dudmuck | 0:cb38da4f4b04 | 66 | } |
dudmuck | 0:cb38da4f4b04 | 67 | } |
dudmuck | 0:cb38da4f4b04 | 68 | |
dudmuck | 0:cb38da4f4b04 | 69 | return crc; |
dudmuck | 0:cb38da4f4b04 | 70 | } |
dudmuck | 0:cb38da4f4b04 | 71 | |
dudmuck | 1:3199506bc2e5 | 72 | void transmit(unsigned target, uint8_t cmd) |
dudmuck | 0:cb38da4f4b04 | 73 | { |
dudmuck | 0:cb38da4f4b04 | 74 | unsigned t_diff; |
dudmuck | 0:cb38da4f4b04 | 75 | uint16_t crc; |
dudmuck | 0:cb38da4f4b04 | 76 | |
Wayne Roberts |
7:ccb3088ce5be | 77 | Radio::radio.tx_buf[0] = cmd; |
dudmuck | 0:cb38da4f4b04 | 78 | t_diff = target - t.read_us(); |
Wayne Roberts |
7:ccb3088ce5be | 79 | Radio::radio.tx_buf[1] = t_diff >> 24; |
Wayne Roberts |
7:ccb3088ce5be | 80 | Radio::radio.tx_buf[2] = t_diff >> 16; |
Wayne Roberts |
7:ccb3088ce5be | 81 | Radio::radio.tx_buf[3] = t_diff >> 8; |
Wayne Roberts |
7:ccb3088ce5be | 82 | Radio::radio.tx_buf[4] = t_diff & 0xff; |
Wayne Roberts |
7:ccb3088ce5be | 83 | crc = crc_ccitt(Radio::radio.tx_buf, 5); |
Wayne Roberts |
7:ccb3088ce5be | 84 | Radio::radio.tx_buf[5] = crc >> 8; |
Wayne Roberts |
7:ccb3088ce5be | 85 | Radio::radio.tx_buf[6] = crc & 0xff; |
dudmuck | 0:cb38da4f4b04 | 86 | |
Wayne Roberts |
7:ccb3088ce5be | 87 | Radio::Send(7, 0, 0, 0); |
dudmuck | 0:cb38da4f4b04 | 88 | |
Wayne Roberts |
7:ccb3088ce5be | 89 | for (tx_done = false; !tx_done; ) |
Wayne Roberts |
7:ccb3088ce5be | 90 | Radio::service(); |
dudmuck | 0:cb38da4f4b04 | 91 | |
dudmuck | 0:cb38da4f4b04 | 92 | printf("t_diff:%u crc:%04x\r\n", t_diff, crc); |
dudmuck | 0:cb38da4f4b04 | 93 | } |
dudmuck | 0:cb38da4f4b04 | 94 | |
dudmuck | 0:cb38da4f4b04 | 95 | #define TARGET_LATENCY 2000000 |
dudmuck | 1:3199506bc2e5 | 96 | void send_alarm(uint8_t cmd) |
dudmuck | 0:cb38da4f4b04 | 97 | { |
dudmuck | 0:cb38da4f4b04 | 98 | int i; |
dudmuck | 0:cb38da4f4b04 | 99 | unsigned target = t.read_us() + TARGET_LATENCY; |
dudmuck | 0:cb38da4f4b04 | 100 | printf("send_alarm() %u\n", target); |
dudmuck | 0:cb38da4f4b04 | 101 | |
dudmuck | 1:3199506bc2e5 | 102 | for (i = 0; i < 5; i++) { |
dudmuck | 1:3199506bc2e5 | 103 | transmit(target, cmd); |
dudmuck | 0:cb38da4f4b04 | 104 | wait(0.1); |
dudmuck | 0:cb38da4f4b04 | 105 | } |
dudmuck | 0:cb38da4f4b04 | 106 | } |
dudmuck | 1:3199506bc2e5 | 107 | |
dudmuck | 1:3199506bc2e5 | 108 | void debounce(DigitalIn* pin, uint8_t cmd) |
dudmuck | 1:3199506bc2e5 | 109 | { |
dudmuck | 1:3199506bc2e5 | 110 | if (!pin->read()) { |
dudmuck | 1:3199506bc2e5 | 111 | int i; |
dudmuck | 1:3199506bc2e5 | 112 | for (i = 0; i < 5; i++) { |
dudmuck | 1:3199506bc2e5 | 113 | wait(0.01); |
dudmuck | 1:3199506bc2e5 | 114 | if (pin->read()) { |
dudmuck | 1:3199506bc2e5 | 115 | printf("trans\r\n"); |
dudmuck | 1:3199506bc2e5 | 116 | break; |
dudmuck | 1:3199506bc2e5 | 117 | } |
dudmuck | 1:3199506bc2e5 | 118 | } |
dudmuck | 1:3199506bc2e5 | 119 | if (i == 5) |
dudmuck | 1:3199506bc2e5 | 120 | send_alarm(cmd); |
dudmuck | 1:3199506bc2e5 | 121 | |
dudmuck | 1:3199506bc2e5 | 122 | while (!pin->read()) |
dudmuck | 1:3199506bc2e5 | 123 | ; |
dudmuck | 1:3199506bc2e5 | 124 | } |
dudmuck | 1:3199506bc2e5 | 125 | } |
dudmuck | 2:0b7620bda2c9 | 126 | |
Wayne Roberts |
7:ccb3088ce5be | 127 | void txDoneCB() |
Wayne Roberts |
7:ccb3088ce5be | 128 | { |
Wayne Roberts |
7:ccb3088ce5be | 129 | tx_done = true; |
Wayne Roberts |
7:ccb3088ce5be | 130 | } |
Wayne Roberts |
7:ccb3088ce5be | 131 | |
Wayne Roberts |
7:ccb3088ce5be | 132 | void rxDoneCB(uint8_t size, float Rssi, float Snr) |
dudmuck | 4:19056d9707ef | 133 | { |
dudmuck | 4:19056d9707ef | 134 | } |
dudmuck | 4:19056d9707ef | 135 | |
Wayne Roberts |
7:ccb3088ce5be | 136 | const RadioEvents_t rev = { |
Wayne Roberts |
7:ccb3088ce5be | 137 | /* Dio0_top_half */ NULL, |
Wayne Roberts |
7:ccb3088ce5be | 138 | /* TxDone_topHalf */ NULL, |
Wayne Roberts |
7:ccb3088ce5be | 139 | /* TxDone_botHalf */ txDoneCB, |
Wayne Roberts |
7:ccb3088ce5be | 140 | /* TxTimeout */ NULL, |
Wayne Roberts |
7:ccb3088ce5be | 141 | /* RxDone */ rxDoneCB, |
Wayne Roberts |
7:ccb3088ce5be | 142 | /* RxTimeout */ NULL, |
Wayne Roberts |
7:ccb3088ce5be | 143 | /* RxError */ NULL, |
Wayne Roberts |
7:ccb3088ce5be | 144 | /* FhssChangeChannel */NULL, |
Wayne Roberts |
7:ccb3088ce5be | 145 | /* CadDone */ NULL |
Wayne Roberts |
7:ccb3088ce5be | 146 | }; |
Wayne Roberts |
7:ccb3088ce5be | 147 | |
dudmuck | 0:cb38da4f4b04 | 148 | int main() |
dudmuck | 0:cb38da4f4b04 | 149 | { |
dudmuck | 0:cb38da4f4b04 | 150 | printf("\r\nreset-tx\r\n"); |
dudmuck | 1:3199506bc2e5 | 151 | |
dudmuck | 3:d8b57eca8c45 | 152 | pinA.mode(PullUp); |
dudmuck | 3:d8b57eca8c45 | 153 | pinB.mode(PullUp); |
dudmuck | 3:d8b57eca8c45 | 154 | pinC.mode(PullUp); |
dudmuck | 3:d8b57eca8c45 | 155 | pinD.mode(PullUp); |
dudmuck | 1:3199506bc2e5 | 156 | |
Wayne Roberts |
7:ccb3088ce5be | 157 | wait(0.05); |
Wayne Roberts |
7:ccb3088ce5be | 158 | |
Wayne Roberts |
7:ccb3088ce5be | 159 | if (pinA.read() == 0) { |
Wayne Roberts |
7:ccb3088ce5be | 160 | printf("pinA-disabled\r\n"); |
Wayne Roberts |
7:ccb3088ce5be | 161 | flags.enable_pin_A = 0; |
Wayne Roberts |
7:ccb3088ce5be | 162 | } else |
Wayne Roberts |
7:ccb3088ce5be | 163 | flags.enable_pin_A = 1; |
Wayne Roberts |
7:ccb3088ce5be | 164 | |
Wayne Roberts |
7:ccb3088ce5be | 165 | if (pinB.read() == 0) { |
Wayne Roberts |
7:ccb3088ce5be | 166 | printf("pinB-disabled\r\n"); |
Wayne Roberts |
7:ccb3088ce5be | 167 | flags.enable_pin_B = 0; |
Wayne Roberts |
7:ccb3088ce5be | 168 | } else |
Wayne Roberts |
7:ccb3088ce5be | 169 | flags.enable_pin_B = 1; |
Wayne Roberts |
7:ccb3088ce5be | 170 | |
Wayne Roberts |
7:ccb3088ce5be | 171 | if (pinC.read() == 0) { |
Wayne Roberts |
7:ccb3088ce5be | 172 | printf("pinC-disabled\r\n"); |
Wayne Roberts |
7:ccb3088ce5be | 173 | flags.enable_pin_C = 0; |
Wayne Roberts |
7:ccb3088ce5be | 174 | } else |
Wayne Roberts |
7:ccb3088ce5be | 175 | flags.enable_pin_C = 1; |
Wayne Roberts |
7:ccb3088ce5be | 176 | |
Wayne Roberts |
7:ccb3088ce5be | 177 | if (pinD.read() == 0) { |
Wayne Roberts |
7:ccb3088ce5be | 178 | printf("pinD-disabled\r\n"); |
Wayne Roberts |
7:ccb3088ce5be | 179 | flags.enable_pin_D = 0; |
Wayne Roberts |
7:ccb3088ce5be | 180 | } else |
Wayne Roberts |
7:ccb3088ce5be | 181 | flags.enable_pin_D = 1; |
Wayne Roberts |
7:ccb3088ce5be | 182 | |
Wayne Roberts |
7:ccb3088ce5be | 183 | t.start(); |
Wayne Roberts |
7:ccb3088ce5be | 184 | |
Wayne Roberts |
7:ccb3088ce5be | 185 | Radio::Init(&rev); |
Wayne Roberts |
7:ccb3088ce5be | 186 | |
Wayne Roberts |
7:ccb3088ce5be | 187 | Radio::Standby(); |
Wayne Roberts |
7:ccb3088ce5be | 188 | Radio::LoRaModemConfig(BW_KHZ, SPREADING_FACTOR, 1); |
Wayne Roberts |
7:ccb3088ce5be | 189 | Radio::LoRaPacketConfig(8, false, true, false); // preambleLen, fixLen, crcOn, invIQ |
Wayne Roberts |
7:ccb3088ce5be | 190 | Radio::SetChannel(CF_HZ); |
Wayne Roberts |
7:ccb3088ce5be | 191 | |
Wayne Roberts |
7:ccb3088ce5be | 192 | Radio::set_tx_dbm(TX_DBM); |
dudmuck | 0:cb38da4f4b04 | 193 | |
dudmuck | 0:cb38da4f4b04 | 194 | for (;;) { |
Wayne Roberts |
7:ccb3088ce5be | 195 | if (flags.enable_pin_A) |
Wayne Roberts |
7:ccb3088ce5be | 196 | debounce(&pinA, CMD_PINA); |
Wayne Roberts |
7:ccb3088ce5be | 197 | |
Wayne Roberts |
7:ccb3088ce5be | 198 | if (flags.enable_pin_B) |
Wayne Roberts |
7:ccb3088ce5be | 199 | debounce(&pinB, CMD_PINB); |
Wayne Roberts |
7:ccb3088ce5be | 200 | |
Wayne Roberts |
7:ccb3088ce5be | 201 | if (flags.enable_pin_C) |
Wayne Roberts |
7:ccb3088ce5be | 202 | debounce(&pinC, CMD_PINC); |
Wayne Roberts |
7:ccb3088ce5be | 203 | |
Wayne Roberts |
7:ccb3088ce5be | 204 | if (flags.enable_pin_D) |
Wayne Roberts |
7:ccb3088ce5be | 205 | debounce(&pinD, CMD_PIND); |
dudmuck | 0:cb38da4f4b04 | 206 | } // ..for (;;) |
dudmuck | 0:cb38da4f4b04 | 207 | } |