STM32 串口接收中断被莫名关闭

使用cubeide+stm32f4进行调试，发现UART4串口会被莫名的关掉，导致不能接收数据，经过排查如下：

HAL_StatusTypeDef HAL_UART_Transmit(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size, uint32_t Timeout)
{uint8_t  *pdata8bits;uint16_t *pdata16bits;uint32_t tickstart = 0U;// 、、、/* Process Unlocked */__HAL_UNLOCK(huart);while (huart->TxXferCount > 0U){if (UART_WaitOnFlagUntilTimeout(huart, UART_FLAG_TXE, RESET, tickstart, Timeout) != HAL_OK){return HAL_TIMEOUT;}if (pdata8bits == NULL){huart->Instance->DR = (uint16_t)(*pdata16bits & 0x01FFU);pdata16bits++;}else{huart->Instance->DR = (uint8_t)(*pdata8bits & 0xFFU);pdata8bits++;}huart->TxXferCount--;}// 、、、
}

 其中的超时检测函数

UART_WaitOnFlagUntilTimeout(huart, UART_FLAG_TXE, RESET, tickstart, Timeout)

会检测发送是否超时，

/*** @brief  This function handles UART Communication Timeout.* @param  huart  Pointer to a UART_HandleTypeDef structure that contains*                the configuration information for the specified UART module.* @param  Flag specifies the UART flag to check.* @param  Status The new Flag status (SET or RESET).* @param  Tickstart Tick start value* @param  Timeout Timeout duration* @retval HAL status*/
static HAL_StatusTypeDef UART_WaitOnFlagUntilTimeout(UART_HandleTypeDef *huart, uint32_t Flag, FlagStatus Status,uint32_t Tickstart, uint32_t Timeout)
{/* Wait until flag is set */while ((__HAL_UART_GET_FLAG(huart, Flag) ? SET : RESET) == Status){/* Check for the Timeout */if (Timeout != HAL_MAX_DELAY){if ((Timeout == 0U) || ((HAL_GetTick() - Tickstart) > Timeout)){/* Disable TXE, RXNE, PE and ERR (Frame error, noise error, overrun error) interrupts for the interrupt process */
/* 居然把中断都给我关掉了！！！！！！！！！！！！！！！！！    */ATOMIC_CLEAR_BIT(huart->Instance->CR1, (USART_CR1_RXNEIE | USART_CR1_PEIE | USART_CR1_TXEIE)); ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_EIE);huart->gState  = HAL_UART_STATE_READY;huart->RxState = HAL_UART_STATE_READY;/* Process Unlocked */__HAL_UNLOCK(huart);return HAL_TIMEOUT;}}}return HAL_OK;
}

超时之后居然把中断都给我关掉了。真是没有天理了。

ATOMIC_CLEAR_BIT(huart->Instance->CR1, (USART_CR1_RXNEIE | USART_CR1_PEIE | USART_CR1_TXEIE)); 

想不通为什么这么做。有知道的可以告诉一声。