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_lr1110.cpp

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

File content as of revision 21:96db08266089:

#include "radio.h"
#ifdef SX1265_H 
#include "SPIu.h"

#ifdef TARGET_FF_ARDUINO
    SPI spi(D11, D12, D13); // mosi, miso, sclk
                   //spi, nss, busy, dio9, nreset
    SX1265 Radio::radio(spi, D7, D3, D5, A0);

    static void initRfSwDIO()
    {
        /*stat_t stat;*/
        uint8_t dioBuf[8];
        /* antenna truth table
         * V1    V2    port
         *  0     0    shutdown
         *  1     0    J2   rx RFI
         *  0     1    J1   HP tx RFO
         *  1     1    J3   LP tx RFO
         * DIO5  DIO6
         */
        dioBuf[  DIO_en_IDX] = DIO5_BIT | DIO6_BIT;
        dioBuf[DIO_stby_IDX] = 0;
        dioBuf[  DIO_rx_IDX] = DIO5_BIT;
        dioBuf[  DIO_tx_IDX] = DIO5_BIT | DIO6_BIT;
        dioBuf[DIO_txhp_IDX] = DIO6_BIT;
        dioBuf[DIO_gnss_IDX] = 0;
        dioBuf[DIO_wifi_IDX] = 0;
        /*stat.word =*/ Radio::radio.xfer(OPCODE_SET_DIO_AS_RFSWITCH, 8, 0, dioBuf);
    }
#else
    /* declare pins for form-factor */
    #error non-ardiuno-form-factor
#endif /* TARGET_FF_ARDUINO */

uint8_t gfsk_pp_buf[9];
uint8_t gfsk_mp_buf[10];
uint8_t lora_pp_buf[6];
uint8_t lora_mp_buf[4];

const RadioEvents_t* RadioEvents;
LowPowerTimer Radio::lpt;
volatile us_timestamp_t Radio::irqAt;
uint8_t Radio::loraTimeoutSymbols;

void Radio::LoRaPacketConfig(unsigned preambleLen, bool fixLen, bool crcOn, bool invIQ)
{
    /*stat_t stat;*/
    if (radio.getPacketType() != PACKET_TYPE_LORA)
        radio.setPacketType(PACKET_TYPE_LORA);

    radio.to_big_endian16(preambleLen, lora_pp_buf); 
    lora_pp_buf[2] = fixLen;
    /* lora_pp_buf[3] =  set when txing, initialized to zero in Init */
    lora_pp_buf[4] = crcOn;
    lora_pp_buf[5] = invIQ;
    /*stat.word =*/ radio.xfer(OPCODE_SET_PACKET_PARAM, 6, 0, lora_pp_buf);
}

void Radio::set_tx_dbm(int8_t dbm)
{
    /*stat_t stat;*/
    uint8_t buf[4];
    int8_t txpower;
    unsigned PaSel, RegPaSupply, PaDutyCycle, PaHPSel;

    if (dbm > 20) {
        txpower = 22;
        PaSel = 1;
        RegPaSupply = 1;
        PaDutyCycle = 4;
        PaHPSel = 7;
    } else if (dbm > 17) {
        txpower = 22;
        PaSel = 1;
        RegPaSupply = 1;
        PaDutyCycle = 2;
        PaHPSel = 7;
    } else if (dbm > 15) {
        txpower = 22;
        PaSel = 1;
        RegPaSupply = 1;
        PaDutyCycle = 4;
        PaHPSel = 3;
    } else {
        txpower = 14;
        PaSel = 0;
        RegPaSupply = 0;
        if (dbm > 14)
            PaDutyCycle = 7;
        else if (dbm > 10)
            PaDutyCycle = 4;
        else
            PaDutyCycle = 0;
        PaHPSel = 0;
    }

    buf[0] = PaSel;
    buf[1] = RegPaSupply;
    buf[2] = PaDutyCycle;
    buf[3] = PaHPSel;
    /*stat.word =*/ radio.xfer(OPCODE_SET_PA_CONFIG, 4, 0, buf);

    buf[0] = txpower;
    buf[1] = 4;
    /*stat.word =*/ radio.xfer(OPCODE_SET_TXPARAMS, 2, 0, buf);
}

void Radio::SetChannel(unsigned hz)
{
    /*stat_t stat;*/
    uint8_t buf[4];
    radio.to_big_endian32(hz, buf);
    /*stat.word =*/ radio.xfer(OPCODE_SET_RF_FREQ_HZ, 4, 0, buf);
}

void Radio::Standby()
{
    /*stat_t stat;*/
    uint8_t buf = 0;    // 0=rc, 1=xosc
    /*stat.word =*/ radio.xfer(OPCODE_SET_STANDBY, 1, 0, &buf);
}

void Radio::LoRaModemConfig(unsigned bwKHz, uint8_t sf, uint8_t cr)
{
    /*stat_t stat;*/
    uint8_t buf[4];
    uint8_t ldro = 0;

    if (radio.getPacketType() != PACKET_TYPE_LORA)
        radio.setPacketType(PACKET_TYPE_LORA);

    if (bwKHz > 500)
        buf[1] = LORA_BW_1000KHz;
    else if (bwKHz > 250)
        buf[1] = LORA_BW_500KHz;
    else if (bwKHz > 125) {
        buf[1] = LORA_BW_250KHz;
    } else if (bwKHz > 80) {
        buf[1] = LORA_BW_125KHz;
        if (sf > 11)
            ldro = 1;
    } else if (bwKHz > 16) {
        buf[1] = LORA_BW_31_25KHz;
        if (sf > 10)
            ldro = 1;
    } else if (bwKHz > 8) {
        buf[1] = LORA_BW_15_6KHz;
        if (sf > 9)
            ldro = 1;
    } else {
        buf[1] = LORA_BW_7_8KHz;
        if (sf > 8)
            ldro = 1;
    }

    buf[0] = sf;
    buf[2] = cr;
    buf[3] = ldro;
    /*stat.word =*/ radio.xfer(OPCODE_SET_MODULATION, 4, 0, buf);
}

int Radio::Send(uint8_t size, timestamp_t maxListenTime, timestamp_t channelFreeTime, int rssiThresh)
{
    /*stat_t stat;*/
    uint8_t pktType;

    pktType = radio.getPacketType();
    if (pktType == PACKET_TYPE_LORA) {
        lora_pp_buf[3] = size;
        /*stat.word =*/ radio.xfer(OPCODE_SET_PACKET_PARAM, 6, 0, lora_pp_buf);
    } else if (pktType == PACKET_TYPE_GFSK) {
        gfsk_pp_buf[6] = size;
        /*stat.word =*/ radio.xfer(OPCODE_SET_PACKET_PARAM, 9, 0, gfsk_pp_buf);
    }

    /* TODO: LBT */

    radio.start_tx(size);
    return 0;
}

void Radio::service()
{
    irq_t irq;
    irq.dword = radio.service();
    if (irq.dword != 0) {
    }
}

bool Radio::init_irq;
void Radio::my_irq_handler()
{
    /* radio irq immediately after hardware reset: hf_xosc start due to TCXO */
    init_irq = true;
}

void Radio::dio9_top_half()
{
    irqAt = lpt.read_us();

    if (RadioEvents->DioPin_top_half)
        RadioEvents->DioPin_top_half();

    if (radio.chipMode == CHIPMODE_TX) {
        /* TxDone handling requires low latency */
        if (RadioEvents->TxDone_topHalf) {
            RadioEvents->TxDone_topHalf();
        } 
    } else {
#ifdef RX_INDICATION
        RX_INDICATION = 0;
#endif
    }
}

void Radio::timeout_callback(bool tx)
{
    if (!tx) {
        if (RadioEvents->RxTimeout)
            RadioEvents->RxTimeout();
    } // else TODO tx timeout
}

void Radio::rx_done(uint8_t size, float rssi, float snr)
{
    RadioEvents->RxDone(size, rssi, snr);
}

void Radio::txDoneBottom()
{
    if (RadioEvents->TxDone_botHalf)
        RadioEvents->TxDone_botHalf();
}

void Radio::Init(const RadioEvents_t* e, unsigned spi_hz)
{
    uint64_t a, b;
    /* initialize payload length to zero in packet params */
    lora_pp_buf[3] = 0;
    gfsk_pp_buf[6] = 0;

    radio.txDone = txDoneBottom;
    radio.rxDone = rx_done;
    radio.timeout = timeout_callback;
    //radio.chipModeChange = chipModeChange;

    RadioEvents = e;
    lpt.start();

    spi.frequency(spi_hz);

    radio.dio9_topHalf = my_irq_handler;
    init_irq = false;
    radio.hw_reset();
    a = Kernel::get_ms_count();
    do {
        b = Kernel::get_ms_count();
        /* wait for radio interrupt at hardware reset, failure to start hf_xosc */
        if (init_irq) {
            radio.service();
            break;
        }
    } while ((b - a) < 30);

    radio.dio9_topHalf = dio9_top_half;

    initRfSwDIO();
}

void Radio::SetLoRaSymbolTimeout(uint16_t symbs)
{
    /*stat_t stat;*/
    if (radio.getPacketType() != PACKET_TYPE_LORA)
        radio.setPacketType(PACKET_TYPE_LORA);

    loraTimeoutSymbols = symbs;
    /*stat.word =*/ radio.xfer(OPCODE_SET_LORA_SYNC_TIMEOUT, 1, 0, &loraTimeoutSymbols);
}

void Radio::Rx(unsigned timeout)
{
    /*stat_t stat;*/
    uint8_t buf[3];
    unsigned rx_timeout;

    if (radio.getPacketType() == PACKET_TYPE_LORA) {
        /*stat.word =*/ radio.xfer(OPCODE_SET_LORA_SYNC_TIMEOUT, 1, 0, &loraTimeoutSymbols);
    }

    if (timeout == 0)
        rx_timeout = 0xffffff;  // receive until instructed otherwise
    else
        rx_timeout = timeout;

    radio.to_big_endian24(rx_timeout, buf);
    /*stat.word =*/ radio.xfer(OPCODE_SET_RX, 3, 0, buf);

}

#endif /* ..SX126x_H */