基于HAL库ecb02蓝牙通过串口透传，串口接收蓝牙端发送字符串的程序

以下是基于HAL库的ecb02蓝牙模块通过串口透传的程序：

#include "main.h"
#include "stdio.h"
#include "string.h"

/* Private variables ---------------------------------------------------------*/
UART_HandleTypeDef huart1;

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_USART1_UART_Init(void);

/* Private function prototypes -----------------------------------------------*/
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart);

/* Private variables ---------------------------------------------------------*/
char BT_RX_Buffer[100];
int BT_RX_Index = 0;
char USART_RX_Buffer[100];
int USART_RX_Index = 0;

int main(void)
{
  /* MCU Configuration--------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* Configure the system clock */
  SystemClock_Config();

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_USART1_UART_Init();

  /* Infinite loop */
  while (1)
  {
    if (BT_RX_Index > 0)
    {
      HAL_UART_Transmit(&huart1, (uint8_t *)BT_RX_Buffer, BT_RX_Index, 1000);
      BT_RX_Index = 0;
    }

    if (USART_RX_Index > 0)
    {
      HAL_UART_Transmit(&huart1, (uint8_t *)USART_RX_Buffer, USART_RX_Index, 1000);
      USART_RX_Index = 0;
    }
  }
}

/** System Clock Configuration
*/
void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

  /** Initializes the RCC Oscillators according to the specified parameters
  * in the RCC_OscInitTypeDef structure.
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }
  /** Initializes the CPU, AHB and APB buses clocks
  */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
  {
    Error_Handler();
  }
}

/** USART1 Initialization Function
*/
void MX_USART1_UART_Init(void)
{

  huart1.Instance = USART1;
  huart1.Init.BaudRate = 9600;
  huart1.Init.WordLength = UART_WORDLENGTH_8B;
  huart1.Init.StopBits = UART_STOPBITS_1;
  huart1.Init.Parity = UART_PARITY_NONE;
  huart1.Init.Mode = UART_MODE_TX_RX;
  huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  huart1.Init.OverSampling = UART_OVERSAMPLING_16;
  if (HAL_UART_Init(&huart1) != HAL_OK)
  {
    Error_Handler();
  }
  /* Enable the UART Data Register not empty interrupt */
  __HAL_UART_ENABLE_IT(&huart1, UART_IT_RXNE);
}

/** GPIO Initialization Function
*/
void MX_GPIO_Init(void)
{

  /* GPIO Ports Clock Enable */
  __HAL_RCC_GPIOA_CLK_ENABLE();

}

void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
  if (huart->Instance == USART1)
  {
    USART_RX_Buffer[USART_RX_Index] = (uint8_t)(USART1->DR & (uint8_t)0x00FF);
    USART_RX_Index++;

    if (USART_RX_Index >= 100)
    {
      USART_RX_Index = 0;
    }
  }

  if (huart->Instance == USART2)
  {
    BT_RX_Buffer[BT_RX_Index] = (uint8_t)(USART2->DR & (uint8_t)0x00FF);
    BT_RX_Index++;

    if (BT_RX_Index >= 100)
    {
      BT_RX_Index = 0;
    }
  }
}

在程序中，我们使用了两个接收缓冲区，一个用于接收蓝牙端发送的数据，另一个用于接收串口数据。当接收到数据时，通过 HAL_UART_RxCpltCallback() 回调函数将数据存储到相应的缓冲区中。在主函数中，我们通过轮询的方式不断检查缓冲区中是否有数据，并使用 HAL_UART_Transmit() 函数将数据透传到另一个设备中。

需要注意的是，在使用 HAL_UART_Init() 函数初始化 UART 时，需要将 UART_IT_RXNE 使能，以使能 UART 的接收中断。同时，在回调函数中需要判断是哪个 UART 接收到了数据，以便将数据存储到相应的缓冲区中。