/* USER CODE BEGIN 0 */
uint8_t rxBuff[1000]; // 接收缓冲区
// size 实际接收的数据的长度
void HAL_UARTEx_RxEventCallback(UART_HandleTypeDef *huart, uint16_t Size) 
{
    if (huart1.Instance == USART1)
    {
        HAL_UART_Transmit(&huart1, rxBuff, Size, 100);
        HAL_UARTEx_ReceiveToIdle_IT(&huart1, rxBuff, 1000);
    }
}
/* USER CODE END 0 */

/**
 * @brief  The application entry point.
 * @retval int
 */
int main(void)
{
    HAL_Init();
    SystemClock_Config();
    MX_GPIO_Init();
    MX_USART1_UART_Init();
    /* 当接收到1000个字符或者碰到空闲帧, 则接收结束 */
    HAL_UARTEx_ReceiveToIdle_IT(&huart1, rxBuff, 1000);
    while (1)
    {
    }
}