STM32L0在stop模式下串口中断激活

进入STOP模式需要关闭所外设，设置串口RX引脚为GPIO中断，代码基于STM32CUBEMX

void system_power_config(void)
{


    GPIO_InitTypeDef GPIO_InitStructure = {0};

    /* Enable Power Control clock */
    __HAL_RCC_PWR_CLK_ENABLE();

    /* Enable Ultra low power mode */
    HAL_PWREx_EnableUltraLowPower();

    /* Enable the fast wake up from Ultra low power mode */
    HAL_PWREx_EnableFastWakeUp();

    HAL_UART_MspDeInit(&huart1);
    HAL_UART_MspDeInit(&huart2);
    HAL_ADC_MspDeInit(&hadc);


    /* Enable GPIOs clock */
    __HAL_RCC_GPIOA_CLK_ENABLE();
    __HAL_RCC_GPIOB_CLK_ENABLE();

    /* Configure all GPIO port pins in Analog Input mode (floating input trigger OFF) */
    /* Note: Debug using ST-Link is not possible during the execution of this   */
    /*       example because communication between ST-link and the device       */
    /*       under test is done through UART. All GPIO pins are disabled (set   */
    /*       to analog input mode) including  UART I/O pins.           */
    GPIO_InitStructure.Pin = GPIO_PIN_All;
    GPIO_InitStructure.Mode = GPIO_MODE_ANALOG;
    GPIO_InitStructure.Pull = GPIO_NOPULL;
    HAL_GPIO_Init(GPIOB, &GPIO_InitStructure);

    GPIO_InitStructure.Pin = GPIO_PIN_All;
    GPIO_InitStructure.Mode = GPIO_MODE_ANALOG;
    GPIO_InitStructure.Pull = GPIO_NOPULL;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStructure);

    /*Configure GPIO pin : PtPin */
    GPIO_InitStructure.Pin = GPIO_PIN_3;
    GPIO_InitStructure.Mode = GPIO_MODE_IT_RISING;
    GPIO_InitStructure.Pull = GPIO_NOPULL;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStructure);
    /* EXTI interrupt init*/
    HAL_NVIC_SetPriority(EXTI2_3_IRQn, 0, 0);
    HAL_NVIC_EnableIRQ(EXTI2_3_IRQn);

    /* Disable GPIOs clock */
    __HAL_RCC_GPIOA_CLK_DISABLE();
    __HAL_RCC_GPIOB_CLK_DISABLE();

}

进入STOP模式后，当串口接收到数据就会产生中断，退出STOP模式，这时需要重新初始化外设

//初始化外设
 HAL_TIM_Base_Start_IT(&htim2);		
 HAL_UART_MspInit(&huart1);
 HAL_UART_MspInit(&huart2);
 HAL_ADC_MspInit(&hadc);

否则接收会不正常