楼主，你要这样操作：
void SystemClock192_Config(void)
{
        RCC_OscInitTypeDef RCC_OscInitStruct;
        RCC_ClkInitTypeDef RCC_ClkInitStruct;
       
        /**Configure the main internal regulator output voltage*/
        __HAL_RCC_PWR_CLK_ENABLE();
       
        __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
       
        /**Initializes the CPU, AHB and APB busses 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_5) != HAL_OK)
        {
                _Error_Handler(__FILE__, __LINE__);
        }
       
        /**Initializes the CPU, AHB and APB busses clocks*/
        RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI|RCC_OSCILLATORTYPE_HSE;
        RCC_OscInitStruct.HSIState = RCC_HSI_ON;
        RCC_OscInitStruct.HSICalibrationValue = 16;
        RCC_OscInitStruct.HSEState = RCC_HSE_ON;       
        RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
        RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
        RCC_OscInitStruct.PLL.PLLM = 25;
        RCC_OscInitStruct.PLL.PLLN = 384;
        RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
        RCC_OscInitStruct.PLL.PLLQ = 8;
        if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
        {
                _Error_Handler(__FILE__, __LINE__);
        }
       
        /**Initializes the CPU, AHB and APB busses clocks*/
        RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                                                                |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
        RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
        RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
        RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
        RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;
       
        if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK)
        {
                _Error_Handler(__FILE__, __LINE__);
        }
       
        /**Activate the Over-Drive mode
        */
        if (HAL_PWREx_EnableOverDrive() != HAL_OK)
        {
                _Error_Handler(__FILE__, __LINE__);
        }
       
        /**Configure the Systick interrupt time*/
        HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);
       
        /**Configure the Systick*/
        HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);
       
        /* SysTick_IRQn interrupt configuration */
        HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);       
}