您好，我在LPBAM停止函数后调用时钟重新初始化函数(此函数和CUBEMX生成的SystemClock_Config()函数一致，仅仅只是重新写了一遍而已)，通过串口输出MSIS和MSIK的寄存器值(通过调用HAL_RCC_GET_MSI_RANGE()和HAL_RCC_GET_MSIK_RANGE()宏)，发现在时钟重新初始化函数执行完后，仅MSIS寄存器值正确(1MHz)，MSIK寄存器值为0(对应是48MHz)，导致部分使用MSIK时钟的外设运行异常！

/**

• @brief 系统时钟配置(MSIS和MSIK)
• @param clockFlag : 系统时钟配置标志 @ref sys_api_clock_flag
• @arg SYS_API_CLOCK_1M : 1MHz
• @arg SYS_API_CLOCK_2M : 2MHz
• @arg SYS_API_CLOCK_4M : 4MHz
• @arg SYS_API_CLOCK_12M : 12MHz
• @arg SYS_API_CLOCK_16M : 16MHz
• @arg SYS_API_CLOCK_24M : 24MHz
• @retval None

*/

void sys_api_system_clock_config(uint8_t clockFlag)

{

uint32_t clockRange;

RCC_OscInitTypeDef RCC_OscInitStruct = {0};

RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

switch(clockFlag)

{

case SYS_API_CLOCK_1M:

    clockRange = RCC_MSIRANGE_7;

    break;

case SYS_API_CLOCK_2M:

    clockRange = RCC_MSIRANGE_5;

    break;

case SYS_API_CLOCK_4M:

    clockRange = RCC_MSIRANGE_4;

    break;

case SYS_API_CLOCK_12M:

    clockRange = RCC_MSIRANGE_3;

    break;

case SYS_API_CLOCK_16M:

    clockRange = RCC_MSIRANGE_2;

    break;

case SYS_API_CLOCK_24M:

    clockRange = RCC_MSIRANGE_1;

    break;

default:

    clockRange = RCC_MSIRANGE_7;

    break;

}

/** Configure the main internal regulator output voltage

*/

if(HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE4) != HAL_OK)

{

Error_Handler();

}

/** Initializes the CPU, AHB and APB buses clocks

*/

RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI|RCC_OSCILLATORTYPE_MSI|RCC_OSCILLATORTYPE_MSIK;

RCC_OscInitStruct.LSIState = RCC_LSI_ON;

RCC_OscInitStruct.MSIState = RCC_MSI_ON;

RCC_OscInitStruct.MSICalibrationValue = RCC_MSICALIBRATION_DEFAULT;

RCC_OscInitStruct.MSIClockRange = clockRange;

RCC_OscInitStruct.LSIDiv = RCC_LSI_DIV1;

RCC_OscInitStruct.MSIKClockRange = clockRange;

RCC_OscInitStruct.MSIKState = RCC_MSIK_ON;

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_CLOCKTYPE_PCLK3;

RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_MSI;

RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;

RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;

RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

RCC_ClkInitStruct.APB3CLKDivider = RCC_HCLK_DIV1;

if(HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)

{

Error_Handler();

}

sys_api_clock_get(); }

是RCC_MSIRANGE_1和RCC_MSIKRANGE_1弄错了，两个的宏定义不是一个