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

Committer:
Wayne Roberts
Date:
2021-02-12
Revision:
5:8f8e5a7aab7a
Parent:
4:938655f1726c

File content as of revision 5:8f8e5a7aab7a:

#include "radio.h"

#if defined(SX128x_H)
    #define BW_KHZ              200
    #define SPREADING_FACTOR    7
    #define CF_HZ               2487000000
    #define TX_DBM              6
#else
    #if defined(SX126x_H)
        #define TX_DBM              (Radio::chipType == CHIP_TYPE_SX1262 ? 20 : 14)
    #else
        #define TX_DBM              20
    #endif
    #define BW_KHZ              125
    #define SPREADING_FACTOR    7
    #define CF_HZ               915000000
#endif

/**********************************************************************/
EventQueue queue(4 * EVENTS_EVENT_SIZE);

void tx_test()
{
    static uint8_t seq = 0;

    Radio::radio.tx_buf[0] = seq++;  /* set payload */
    Radio::Send(1, 0, 0, 0);   /* begin transmission */
    printf("sent\r\n");

/*    {
        mbed_stats_cpu_t stats;
        mbed_stats_cpu_get(&stats);
        printf("canDeep:%u ", sleep_manager_can_deep_sleep());
        printf("Uptime: %llu ", stats.uptime / 1000);
        printf("Sleep time: %llu ", stats.sleep_time / 1000);
        printf("Deep Sleep: %llu\r\n", stats.deep_sleep_time / 1000);
    }*/
}

void txDoneCB()
{
    printf("got-tx-done\r\n");
    queue.call_in(500, tx_test);
}

void rxDoneCB(uint8_t size, float rssi, float snr)
{
}


void radio_irq_callback()
{
    queue.call(Radio::service);
}


const RadioEvents_t rev = {
    /* DioPin_top_half */   radio_irq_callback,
    /* TxDone_topHalf */    NULL,
    /* TxDone_botHalf */    txDoneCB,
    /* TxTimeout  */        NULL,
    /* RxDone  */           rxDoneCB,
    /* RxTimeout  */        NULL,
    /* RxError  */          NULL,
    /* FhssChangeChannel  */NULL,
    /* CadDone  */          NULL
};

int main()
{
    printf("\r\nreset-tx ");

    Radio::Init(&rev);

    Radio::Standby();
    Radio::LoRaModemConfig(BW_KHZ, SPREADING_FACTOR, 1);
    Radio::SetChannel(CF_HZ);

    Radio::set_tx_dbm(TX_DBM);

               // preambleLen, fixLen, crcOn, invIQ
    Radio::LoRaPacketConfig(8, false, true, false);

    queue.call_in(500, tx_test);

    queue.dispatch();
}