RTC时间更新 NTP协议

首先，需要对RTC进行初始化，初始化的详解介绍见链接：RTC

static void MX_RTC_Init(void) { RTC_TimeTypeDef sTime; RTC_DateTypeDef sDate; RTC_AlarmTypeDef sAlarm; /**Initialize RTC Only */ hrtc.Instance = RTC; hrtc.Init.HourFormat = RTC_HOURFORMAT_24; hrtc.Init.AsynchPrediv = 39; hrtc.Init.SynchPrediv = 799; //本芯片采用内部32K时钟源，32k/(39+1)(799+1)=1HZ hrtc.Init.OutPut = RTC_OUTPUT_DISABLE; hrtc.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH; hrtc.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN; if (HAL_RTC_Init(&hrtc) != HAL_OK) { _Error_Handler(__FILE__, __LINE__); }/**Initialize RTC and set the Time and Date */ if(HAL_RTCEx_BKUPRead(&hrtc, RTC_BKP_DR0) != 0x32F6) { sTime.Hours = 0x01; sTime.Minutes = 0x01; sTime.Seconds = 0x01; sTime.DayLightSaving = RTC_DAYLIGHTSAVING_NONE; sTime.StoreOperation = RTC_STOREOPERATION_RESET; if (HAL_RTC_SetTime(&hrtc, &sTime, RTC_FORMAT_BCD) != HAL_OK) { _Error_Handler(__FILE__, __LINE__); }sDate.WeekDay = RTC_WEEKDAY_FRIDAY; sDate.Month = RTC_MONTH_JANUARY; sDate.Date = 0x01; sDate.Year = 0x18; if (HAL_RTC_SetDate(&hrtc, &sDate, RTC_FORMAT_BCD) != HAL_OK) { _Error_Handler(__FILE__, __LINE__); }HAL_RTCEx_BKUPWrite(&hrtc,RTC_BKP_DR0,0x32F6); } }

【RTC时间更新】下面是在获取了网络时间后，对RTC进行更新的代码。

//RTC更新 void RTC_Update(void) { RTC_DateTypeDef sdatestructure; RTC_TimeTypeDef stimestructure; /*##-1- Configure the Date #################################################*/ sdatestructure.Year =Net_time->tm_year+1900-2000; sdatestructure.Month =Net_time->tm_mon+1; sdatestructure.Date = Net_time->tm_mday; sdatestructure.WeekDay = Net_time->tm_wday; if (HAL_RTC_SetDate(&hrtc, &sdatestructure, RTC_FORMAT_BIN) != HAL_OK) { _Error_Handler(__FILE__, __LINE__); }/*##-2- Configure the Time #################################################*/ stimestructure.Hours =Net_time->tm_hour; stimestructure.Minutes =Net_time->tm_min; stimestructure.Seconds = Net_time->tm_sec; stimestructure.TimeFormat = RTC_HOURFORMAT12_AM; stimestructure.DayLightSaving = RTC_DAYLIGHTSAVING_NONE ; stimestructure.StoreOperation = RTC_STOREOPERATION_RESET; if (HAL_RTC_SetTime(&hrtc, &stimestructure, RTC_FORMAT_BIN) != HAL_OK) { _Error_Handler(__FILE__, __LINE__); } HAL_RTCEx_BKUPWrite(&hrtc,RTC_BKP_DR0,0x32F6); }

接着是获取RTC时间并打印出来代码。

void RTC_Show(void) { RTC_DateTypeDef sdate_get; RTC_TimeTypeDef stime_get; /* Get the RTC current Date */ HAL_RTC_GetDate(&hrtc, &sdate_get, RTC_FORMAT_BIN); /* Get the RTC current Time */ HAL_RTC_GetTime(&hrtc, &stime_get, RTC_FORMAT_BIN); printf("%d-%02d-%02d%02d:%02d:%02d\r\n",2000 + sdate_get.Year, sdate_get.Month, sdate_get.Date,\ stime_get.Hours,stime_get.Minutes,stime_get.Seconds); }

主程序中调用NTP函数获取时间、然后更新RTC，接着打印出更新之后的RTC时间即可。下图是从NTP获取时间后间隔5秒打印出RTC时间的效果。