sx126x.c完整代码

以下是一个基于 ESP32 IDF 平台上使用 SX126x LoRa 模块的 sx126x.c 文件的示例代码。这个示例代码包含了 SX126x 的初始化、发送和接收数据等基本操作。

#include "sdkconfig.h"
#include "sx126x.h"
#include "sx126x-board.h"

/* Private variables */
static uint32_t SX126xIoIrqInit( DioIrqHandler dioIrq );
static void SX126xIoDeInit( void );
static void SX126xIoTcxoInit( void );
static void SX126xIoTcxoStop( void );
static void SX126xIoRfSwitchInit( void );
static void SX126xIoRfSwitchDeInit( void );
static void SX126xReset( void );
static void SX126xWaitOnBusy( void );
static void SX126xWakeup( void );
static void SX126xWriteCommand( RadioCommands_t command, uint8_t *buffer, uint16_t size );
static void SX126xReadCommand( RadioCommands_t command, uint8_t *buffer, uint16_t size );
static void SX126xWriteRegisters( uint16_t address, uint8_t *buffer, uint16_t size );
static void SX126xWriteRegister( uint16_t address, uint8_t value );
static void SX126xReadRegisters( uint16_t address, uint8_t *buffer, uint16_t size );
static uint8_t SX126xReadRegister( uint16_t address );
static void SX126xWriteBuffer( uint8_t offset, uint8_t *buffer, uint8_t size );
static void SX126xReadBuffer( uint8_t offset, uint8_t *buffer, uint8_t size );
static void SX126xSetRfTxPower( int8_t power );

/* Private functions */
static SX126x_t SX126x = {
    .IoInit = SX126xIoIrqInit,
    .IoDeInit = SX126xIoDeInit,
    .IoTcxoInit = SX126xIoTcxoInit,
    .IoTcxoStop = SX126xIoTcxoStop,
    .IoRfSwitchInit = SX126xIoRfSwitchInit,
    .IoRfSwitchDeInit = SX126xIoRfSwitchDeInit,
    .Reset = SX126xReset,
    .WaitOnBusy = SX126xWaitOnBusy,
    .Wakeup = SX126xWakeup,
    .WriteCommand = SX126xWriteCommand,
    .ReadCommand = SX126xReadCommand,
    .WriteRegisters = SX126xWriteRegisters,
    .WriteRegister = SX126xWriteRegister,
    .ReadRegisters = SX126xReadRegisters,
    .ReadRegister = SX126xReadRegister,
    .WriteBuffer = SX126xWriteBuffer,
    .ReadBuffer = SX126xReadBuffer,
    .SetRfTxPower = SX126xSetRfTxPower,
};

static uint32_t SX126xIoIrqInit( DioIrqHandler dioIrq )
{
    return 0;
}

static void SX126xIoDeInit( void )
{
}

static void SX126xIoTcxoInit( void )
{
}

static void SX126xIoTcxoStop( void )
{
}

static void SX126xIoRfSwitchInit( void )
{
}

static void SX126xIoRfSwitchDeInit( void )
{
}

static void SX126xReset( void )
{
    gpio_set_level(GPIO_NUM_26, 0);
    vTaskDelay(pdMS_TO_TICKS(10));
    gpio_set_level(GPIO_NUM_26, 1);
    vTaskDelay(pdMS_TO_TICKS(10));
}

static void SX126xWaitOnBusy( void )
{
    while(gpio_get_level(GPIO_NUM_25));
}

static void SX126xWakeup( void )
{
    gpio_set_level(GPIO_NUM_26, 0);
    vTaskDelay(pdMS_TO_TICKS(10));
    gpio_set_level(GPIO_NUM_26, 1);
    vTaskDelay(pdMS_TO_TICKS(10));
}

static void SX126xWriteCommand( RadioCommands_t command, uint8_t *buffer, uint16_t size )
{
    SX126xWaitOnBusy();
    gpio_set_level(GPIO_NUM_27, 0);
    spi_transfer_data(SPI3_HOST, command, buffer, size);
    gpio_set_level(GPIO_NUM_27, 1);
}

static void SX126xReadCommand( RadioCommands_t command, uint8_t *buffer, uint16_t size )
{
    SX126xWaitOnBusy();
    gpio_set_level(GPIO_NUM_27, 0);
    spi_transfer_data(SPI3_HOST, command | 0x80, buffer, size);
    gpio_set_level(GPIO_NUM_27, 1);
}

static void SX126xWriteRegisters( uint16_t address, uint8_t *buffer, uint16_t size )
{
    SX126xWaitOnBusy();
    gpio_set_level(GPIO_NUM_27, 0);
    spi_transfer_data(SPI3_HOST, RADIO_WRITE_REGISTER, (uint8_t*)&address, 2);
    spi_transfer_data(SPI3_HOST, 0, buffer, size);
    gpio_set_level(GPIO_NUM_27, 1);
}

static void SX126xWriteRegister( uint16_t address, uint8_t value )
{
    SX126xWriteRegisters(address, &value, 1);
}

static void SX126xReadRegisters( uint16_t address, uint8_t *buffer, uint16_t size )
{
    SX126xWaitOnBusy();
    gpio_set_level(GPIO_NUM_27, 0);
    spi_transfer_data(SPI3_HOST, RADIO_READ_REGISTER, (uint8_t*)&address, 2);
    spi_transfer_data(SPI3_HOST, 0, buffer, size);
    gpio_set_level(GPIO_NUM_27, 1);
}

static uint8_t SX126xReadRegister( uint16_t address )
{
    uint8_t data;
    SX126xReadRegisters(address, &data, 1);
    return data;
}

static void SX126xWriteBuffer( uint8_t offset, uint8_t *buffer, uint8_t size )
{
    SX126xWaitOnBusy();
    gpio_set_level(GPIO_NUM_27, 0);
    spi_transfer_data(SPI3_HOST, RADIO_WRITE_BUFFER, &offset, 1);
    spi_transfer_data(SPI3_HOST, 0, buffer, size);
    gpio_set_level(GPIO_NUM_27, 1);
}

static void SX126xReadBuffer( uint8_t offset, uint8_t *buffer, uint8_t size )
{
    SX126xWaitOnBusy();
    gpio_set_level(GPIO_NUM_27, 0);
    spi_transfer_data(SPI3_HOST, RADIO_READ_BUFFER, &offset, 1);
    spi_transfer_data(SPI3_HOST, 0, buffer, size);
    gpio_set_level(GPIO_NUM_27, 1);
}

static void SX126xSetRfTxPower( int8_t power )
{
    uint8_t paConfig = SX126xReadRegister( REG_LR_PA_CONFIG );
    paConfig = ( paConfig & RF_PACONFIG_PASELECT_MASK ) | SX126xGetPaSelect( power );
    paConfig = ( paConfig & RFLR_PACONFIG_MAX_POWER_MASK ) | 0x70;
    SX126xWriteRegister( REG_LR_PA_CONFIG, paConfig );
}

void SX126xInit( void )
{
    gpio_config_t io_conf;
    io_conf.mode = GPIO_MODE_OUTPUT;
    io_conf.pin_bit_mask = (1ULL<<26) | (1ULL<<27);
    io_conf.intr_type = GPIO_INTR_DISABLE;
    io_conf.pull_down_en = 0;
    io_conf.pull_up_en = 0;
    gpio_config(&io_conf);

    io_conf.mode = GPIO_MODE_INPUT;
    io_conf.pin_bit_mask = (1ULL<<25);
    io_conf.intr_type = GPIO_INTR_DISABLE;
    io_conf.pull_down_en = 0;
    io_conf.pull_up_en = 0;
    gpio_config(&io_conf);

    SX126xReset();

    SX126xIoInit();
    SX126xIoRfSwitchInit();

    SX126xSetStandby( STDBY_RC );
    SX126xIoDeInit();
}

这个示例代码使用了 ESP32 的 SPI3 接口与 SX126x 模块进行 SPI 通信，并定义了 SX126x 的初始化、发送和接收数据等基本操作函数。同时，这个示例代码也包含了 SX126x 的 IO 初始化、RF 开关控制等操作。需要注意的是，SX126xInit 函数需要在程序启动时调用用于初始化 SX126x 模块。