wayne roberts / Mbed OS simple_tx

basic LoRa transmitter example

Dependencies:   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 LR1110, then import LR1110 driver into your program.
If you're using NAmote72 or Murata discovery, then you must import only sx127x driver.
If you're using Type1SJ select target DISCO_L072CZ_LRWAN1 and import sx126x driver into your program.

Use project simple_rx on receiving end.

main.cpp@0:83bfd3e3c4c4, 2018-07-17 (annotated)

Committer:
Wayne Roberts
Date:
Tue Jul 17 16:18:48 2018 -0700
Revision:
0:83bfd3e3c4c4
Child:
2:3f4dfcc3bab6
initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Wayne Roberts 0:83bfd3e3c4c4 1 #include "radio.h"
Wayne Roberts 0:83bfd3e3c4c4 2
Wayne Roberts 0:83bfd3e3c4c4 3 #if defined(SX127x_H)
Wayne Roberts 0:83bfd3e3c4c4 4 #define BW_KHZ 125
Wayne Roberts 0:83bfd3e3c4c4 5 #define SPREADING_FACTOR 7
Wayne Roberts 0:83bfd3e3c4c4 6 #define CF_HZ 915000000
Wayne Roberts 0:83bfd3e3c4c4 7 #define TX_DBM 20
Wayne Roberts 0:83bfd3e3c4c4 8 #elif defined(SX126x_H)
Wayne Roberts 0:83bfd3e3c4c4 9 #define BW_KHZ 125
Wayne Roberts 0:83bfd3e3c4c4 10 #define SPREADING_FACTOR 7
Wayne Roberts 0:83bfd3e3c4c4 11 #define CF_HZ 915000000
Wayne Roberts 0:83bfd3e3c4c4 12 #define TX_DBM (Radio::chipType == CHIP_TYPE_SX1262 ? 20 : 14)
Wayne Roberts 0:83bfd3e3c4c4 13 #elif defined(SX128x_H)
Wayne Roberts 0:83bfd3e3c4c4 14 #define BW_KHZ 200
Wayne Roberts 0:83bfd3e3c4c4 15 #define SPREADING_FACTOR 7
Wayne Roberts 0:83bfd3e3c4c4 16 #define CF_HZ 2487000000
Wayne Roberts 0:83bfd3e3c4c4 17 #define TX_DBM 6
Wayne Roberts 0:83bfd3e3c4c4 18 #endif
Wayne Roberts 0:83bfd3e3c4c4 19
Wayne Roberts 0:83bfd3e3c4c4 20 /**********************************************************************/
Wayne Roberts 0:83bfd3e3c4c4 21 volatile bool txDone;
Wayne Roberts 0:83bfd3e3c4c4 22
Wayne Roberts 0:83bfd3e3c4c4 23 void txDoneCB()
Wayne Roberts 0:83bfd3e3c4c4 24 {
Wayne Roberts 0:83bfd3e3c4c4 25 txDone = true;
Wayne Roberts 0:83bfd3e3c4c4 26 }
Wayne Roberts 0:83bfd3e3c4c4 27
Wayne Roberts 0:83bfd3e3c4c4 28 void rxDoneCB(uint8_t size, float rssi, float snr)
Wayne Roberts 0:83bfd3e3c4c4 29 {
Wayne Roberts 0:83bfd3e3c4c4 30 }
Wayne Roberts 0:83bfd3e3c4c4 31
Wayne Roberts 0:83bfd3e3c4c4 32 const RadioEvents_t rev = {
Wayne Roberts 0:83bfd3e3c4c4 33 /* Dio0_top_half */ NULL,
Wayne Roberts 0:83bfd3e3c4c4 34 /* TxDone_topHalf */ NULL,
Wayne Roberts 0:83bfd3e3c4c4 35 /* TxDone_botHalf */ txDoneCB,
Wayne Roberts 0:83bfd3e3c4c4 36 /* TxTimeout */ NULL,
Wayne Roberts 0:83bfd3e3c4c4 37 /* RxDone */ rxDoneCB,
Wayne Roberts 0:83bfd3e3c4c4 38 /* RxTimeout */ NULL,
Wayne Roberts 0:83bfd3e3c4c4 39 /* RxError */ NULL,
Wayne Roberts 0:83bfd3e3c4c4 40 /* FhssChangeChannel */NULL,
Wayne Roberts 0:83bfd3e3c4c4 41 /* CadDone */ NULL
Wayne Roberts 0:83bfd3e3c4c4 42 };
Wayne Roberts 0:83bfd3e3c4c4 43
Wayne Roberts 0:83bfd3e3c4c4 44 int main()
Wayne Roberts 0:83bfd3e3c4c4 45 {
Wayne Roberts 0:83bfd3e3c4c4 46 uint8_t seq = 0;
Wayne Roberts 0:83bfd3e3c4c4 47
Wayne Roberts 0:83bfd3e3c4c4 48 printf("\r\nreset-tx ");
Wayne Roberts 0:83bfd3e3c4c4 49
Wayne Roberts 0:83bfd3e3c4c4 50 Radio::Init(&rev);
Wayne Roberts 0:83bfd3e3c4c4 51
Wayne Roberts 0:83bfd3e3c4c4 52 Radio::Standby();
Wayne Roberts 0:83bfd3e3c4c4 53 Radio::LoRaModemConfig(BW_KHZ, SPREADING_FACTOR, 1);
Wayne Roberts 0:83bfd3e3c4c4 54 Radio::SetChannel(CF_HZ);
Wayne Roberts 0:83bfd3e3c4c4 55
Wayne Roberts 0:83bfd3e3c4c4 56 Radio::set_tx_dbm(TX_DBM);
Wayne Roberts 0:83bfd3e3c4c4 57
Wayne Roberts 0:83bfd3e3c4c4 58 // preambleLen, fixLen, crcOn, invIQ
Wayne Roberts 0:83bfd3e3c4c4 59 Radio::LoRaPacketConfig(8, false, true, false);
Wayne Roberts 0:83bfd3e3c4c4 60
Wayne Roberts 0:83bfd3e3c4c4 61 for (;;) {
Wayne Roberts 0:83bfd3e3c4c4 62 Radio::radio.tx_buf[0] = seq; /* set payload */
Wayne Roberts 0:83bfd3e3c4c4 63 txDone = false;
Wayne Roberts 0:83bfd3e3c4c4 64 Radio::Send(1, 0, 0, 0); /* begin transmission */
Wayne Roberts 0:83bfd3e3c4c4 65
Wayne Roberts 0:83bfd3e3c4c4 66 printf("sent\r\n");
Wayne Roberts 0:83bfd3e3c4c4 67 while (!txDone) {
Wayne Roberts 0:83bfd3e3c4c4 68 Radio::service();
Wayne Roberts 0:83bfd3e3c4c4 69 }
Wayne Roberts 0:83bfd3e3c4c4 70
Wayne Roberts 0:83bfd3e3c4c4 71 printf("got-tx-done\r\n");
Wayne Roberts 0:83bfd3e3c4c4 72
Wayne Roberts 0:83bfd3e3c4c4 73 wait(0.5); /* throttle sending rate */
Wayne Roberts 0:83bfd3e3c4c4 74 seq++; /* change payload */
Wayne Roberts 0:83bfd3e3c4c4 75 }
Wayne Roberts 0:83bfd3e3c4c4 76 }
Wayne Roberts 0:83bfd3e3c4c4 77