esp32 基于sx1268的lora网关的idf完整代码

以下是基于ESP32和SX1268芯片的LoRa网关的完整idf代码示例：

#include <stdio.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "esp_log.h"
#include "driver/spi_master.h"
#include "sx126x.h"
#include "lora_gateway.h"

#define TAG "LoRa"

// SX1268芯片的SPI引脚定义
#define PIN_NUM_MISO 19
#define PIN_NUM_MOSI 23
#define PIN_NUM_CLK  18
#define PIN_NUM_CS   5
#define PIN_NUM_BUSY 4
#define PIN_NUM_RST  21
#define PIN_NUM_DIO1 36

// LoRa网关的参数定义
#define LORA_FREQUENCY 868000000
#define LORA_BANDWIDTH 125000
#define LORA_SPREADING_FACTOR 7
#define LORA_CODING_RATE 1
#define LORA_SYNC_WORD 0x12
#define LORA_TX_POWER 14
#define LORA_PREAMBLE_LENGTH 8
#define LORA_HEADER_MODE SX126X_LORA_PACKET_VARIABLE_LENGTH
#define LORA_PAYLOAD_LENGTH 255
#define LORA_RX_TIMEOUT 0

static spi_device_handle_t spi;

// SX1268芯片的SPI总线初始化函数
static void sx126x_spi_init(void)
{
    spi_bus_config_t bus_config = {
        .miso_io_num = PIN_NUM_MISO,
        .mosi_io_num = PIN_NUM_MOSI,
        .sclk_io_num = PIN_NUM_CLK,
        .quadwp_io_num = -1,
        .quadhd_io_num = -1,
        .max_transfer_sz = 0
    };
    spi_device_interface_config_t dev_config = {
        .command_bits = 0,
        .address_bits = 0,
        .dummy_bits = 0,
        .mode = 0,
        .duty_cycle_pos = 0,
        .cs_ena_pretrans = 0,
        .cs_ena_posttrans = 0,
        .clock_speed_hz = 10000000,
        .input_delay_ns = 0,
        .spics_io_num = PIN_NUM_CS,
        .flags = 0,
        .queue_size = 1
    };
    spi_bus_initialize(HSPI_HOST, &bus_config, 1);
    spi_bus_add_device(HSPI_HOST, &dev_config, &spi);
}

// LoRa网关的初始化函数
void lora_gateway_init(void)
{
    // 初始化SPI总线和SX1268芯片
    sx126x_spi_init();
    sx126x_init(spi, PIN_NUM_BUSY, PIN_NUM_RST, PIN_NUM_DIO1);

    // 配置LoRa参数
    sx126x_set_standby();
    sx126x_set_channel(LORA_FREQUENCY);
    sx126x_set_lora_modem();
    sx126x_set_lora_bandwidth(LORA_BANDWIDTH);
    sx126x_set_lora_spreading_factor(LORA_SPREADING_FACTOR);
    sx126x_set_lora_coding_rate(LORA_CODING_RATE);
    sx126x_set_lora_sync_word(LORA_SYNC_WORD);
    sx126x_set_tx_power(LORA_TX_POWER);
    sx126x_set_lora_preamble_length(LORA_PREAMBLE_LENGTH);
    sx126x_set_lora_header_mode(LORA_HEADER_MODE);
    sx126x_set_lora_payload_length(LORA_PAYLOAD_LENGTH);
    sx126x_set_lora_rx_timeout(LORA_RX_TIMEOUT);

    // 进入待机状态
    sx126x_set_standby();
}

// LoRa网关的发送数据函数
void lora_gateway_send_data(const uint8_t *data, uint8_t size)
{
    // 配置SX1268芯片为发送模式
    sx126x_set_standby();
    sx126x_set_lora_tx();

    // 将数据发送到SX1268芯片
    sx126x_write_buffer(data, size);

    // 等待发送完成
    sx126x_wait_for_tx_done();
}

// LoRa网关的接收数据函数
uint8_t lora_gateway_receive_data(uint8_t *data, uint8_t size)
{
    // 配置SX1268芯片为接收模式
    sx126x_set_standby();
    sx126x_set_lora_rx();

    // 等待接收完成
    if (sx126x_wait_for_rx_done() == SX126X_STATUS_OK)
    {
        // 从SX1268芯片读取接收到的数据
        uint8_t received_size = sx126x_read_buffer(data, size);
        return received_size;
    }
    else
    {
        return 0;
    }
}

void app_main(void)
{
    // 初始化LoRa网关
    lora_gateway_init();

    while (1)
    {
        // 接收LoRa数据
        uint8_t received_data[LORA_PAYLOAD_LENGTH];
        uint8_t received_size = lora_gateway_receive_data(received_data, LORA_PAYLOAD_LENGTH);
        if (received_size > 0)
        {
            ESP_LOGI(TAG, "Received %d bytes of data", received_size);
            // 处理接收到的数据
            // ...
        }

        // 发送LoRa数据
        uint8_t send_data[] = {0x01, 0x02, 0x03, 0x04};
        lora_gateway_send_data(send_data, sizeof(send_data));
        ESP_LOGI(TAG, "Sent data: %02x %02x %02x %02x", send_data[0], send_data[1], send_data[2], send_data[3]);

        // 等待一段时间
        vTaskDelay(1000 / portTICK_PERIOD_MS);
    }
}

需要注意的是，这个示例代码中的LoRa参数是根据868MHz频段和125kHz带宽进行配置的，使用时需要根据实际情况进行修改。同时，还需要进行相关的硬件连接和配置，如SX1268芯片的SPI引脚定义、硬件连接等。