wayne roberts / sx12xx_hal

Hardware Abstraction Layer, permitting any LoRa application to use any LoRa radio chip

Dependents:   alarm_slave alarm_master lora_p2p lorawan1v1 ... more

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.

Pin assigned to arduino LoRa radio shield form-factor

radio_ff_arduino_sx127x.cpp

Committer:
Wayne Roberts
Date:
2021-02-05
Revision:
21:96db08266089
Parent:
17:5f34cbe2ac53

File content as of revision 21:96db08266089:

/* Only for NUCLEO boards: prevent compiling for MOTE_L152RC and typeABZ discovery */
#if defined(TARGET_FF_ARDUINO) && !defined(TARGET_DISCO_L072CZ_LRWAN1) && !defined(TARGET_MOTE_L152RC)
#include "radio.h"
#ifdef SX127x_H 
#include "SPIu.h"

SPIu spi(D11, D12, D13); // mosi, miso, sclk
//                  dio0, dio1, nss, spi, rst
SX127x Radio::radio(  D2,   D3, D10, spi, A0); // sx127[62] arduino shield
SX127x_lora Radio::lora(radio);
SX127x_fsk Radio::fsk(radio);

InterruptIn Radio::dio0(D2);
InterruptIn Radio::dio1(D3);

typedef enum {
    SHIELD_TYPE_NONE = 0,
    SHIELD_TYPE_LAS,
    SHIELD_TYPE_MAS,
} shield_type_e;
shield_type_e shield_type;

#ifdef TARGET_FF_MORPHO
DigitalOut pc3(PC_3);   // debug RX indication, for nucleo boards
#endif /* TARGET_FF_MORPHO */
DigitalInOut rfsw(A4);
void Radio::rfsw_callback()
{
    if (radio.RegOpMode.bits.Mode == RF_OPMODE_TRANSMITTER)
        rfsw = 1;
    else
        rfsw = 0;

#ifdef TARGET_FF_MORPHO
    if (radio.RegOpMode.bits.Mode == RF_OPMODE_RECEIVER || radio.RegOpMode.bits.Mode == RF_OPMODE_RECEIVER_SINGLE)
        pc3 = 1;
    else
        pc3 = 0;
#endif /* TARGET_FF_MORPHO */
}

void
Radio::set_tx_dbm(int8_t dbm)
{
    RegPdsTrim1_t pds_trim;
    uint8_t v, adr, pa_test_adr;

    if (radio.type == SX1276) {
        adr = REG_PDSTRIM1_SX1276;
        pa_test_adr = REG_PATEST_SX1276;
    } else {
        adr = REG_PDSTRIM1_SX1272;
        pa_test_adr = REG_PATEST_SX1272;
    }
       
    v = radio.read_reg(pa_test_adr);
    if (dbm == PA_OFF_DBM) {
        /* for bench testing: prevent overloading receiving station (very low TX power) */
        v &= ~0x20; // turn off pu_regpa_n: disable PA
        radio.write_reg(pa_test_adr, v);
        return;
    } else if ((v & 0x20) == 0) {
        v |= 0x20; // turn on pu_regpa_n: enable PA
        radio.write_reg(pa_test_adr, v);
    }

    pds_trim.octet = radio.read_reg(adr);   

    if (shield_type == SHIELD_TYPE_LAS)
        radio.RegPaConfig.bits.PaSelect = 1;
    else
        radio.RegPaConfig.bits.PaSelect = 0;
                
    if (radio.RegPaConfig.bits.PaSelect) {
        /* PABOOST used: +2dbm to +17, or +20 */
        if (dbm > 17) {
            if (dbm > 20)
                dbm = 20;
            dbm -= 3;
            pds_trim.bits.prog_txdac = 7;
            radio.write_reg(adr, pds_trim.octet);
            ocp(150);
        } else
            ocp(120);

        if (dbm > 1)
                radio.RegPaConfig.bits.OutputPower = dbm - 2;
    } else {
        /* RFO used: -1 to +14dbm */
        ocp(80);
        if (dbm < 15)
            radio.RegPaConfig.bits.OutputPower = dbm + 1;
    }
    radio.write_reg(REG_PACONFIG, radio.RegPaConfig.octet);

    radio.RegPaConfig.octet = radio.read_reg(REG_PACONFIG);
    if (radio.RegPaConfig.bits.PaSelect) {
        dbm = radio.RegPaConfig.bits.OutputPower + pds_trim.bits.prog_txdac - 2;
    } else {
        dbm = radio.RegPaConfig.bits.OutputPower - 1;
    }
}

void Radio::boardInit()
{
    printf("boardInit sx127x-ff-arduino ");
    rfsw.input();
    if (rfsw.read()) {
        shield_type = SHIELD_TYPE_LAS;
        printf("LAS\r\n");
    } else {
        shield_type = SHIELD_TYPE_MAS;
        printf("MAS\r\n");
    }
    
    rfsw.output();
}

#endif /* ..SX127x_H */
#endif /* ...sx127x shield */