stm32 RTC如何获取ms计时

    RTC_TimeTypeDef stimestructure;
    RTC_DateTypeDef sdatestructure; 

    while (1)
    {
        /* USER CODE END WHILE */
        HAL_RTC_GetTime(&hrtc, &stimestructure, RTC_FORMAT_BIN);
        HAL_RTC_GetDate(&hrtc, &sdatestructure, RTC_FORMAT_BIN);
        
        // 亚秒值
        printf("%.3f,%d \r\n",(255.0-stimestructure.SubSeconds)/256, HAL_GetTick());
        
//        printf("%02d/%02d/%02d ",2000 + sdatestructure.Year, sdatestructure.Month, sdatestructure.Date);
//        printf("%02d:%02d:%.3f \r\n",stimestructure.Hours, stimestructure.Minutes,stimestructure.Seconds+(255.0-stimestructure.SubSeconds)/256);
        HAL_Delay(10);
        /* USER CODE BEGIN 3 */

    }