[问答]

如何为RTC设置一个时间戳？

250 RTC

问答对人有帮助，内容完整，我也想知道答案 0 我正在为我的 RTC 设置一个时间戳，当我立即读回它时，我注意到小时设置总是关闭 1 小时。我没有在 RTC 上启用夏令时模式，我不明白为什么小时设置关闭。我认为问题与夏令时有关，并尝试了 RTC 的 Add1H 和 Sub1H 设置，但这些设置对问题没有任何影响。这是我的测试日志： Write time - 1662156522 (Timestamp is 02-09-2022 / 22:08:42) After converting from timestamp 22:08:42 (Timestamp converted just before setting RTC) 02-09-2022 / 21:08:56 (Read Time ()) 我的实时时钟初始化（） static void MX_RTC_Init(void) { /* USER CODE BEGIN RTC_Init 0 / / USER CODE END RTC_Init 0 / RTC_TimeTypeDef sTime = {0}; RTC_DateTypeDef sDate = {0}; / USER CODE BEGIN RTC_Init 1 / / USER CODE END RTC_Init 1 / /* Initialize RTC Only / hrtc.Instance = RTC; hrtc.Init.HourFormat = RTC_HOURFORMAT_24; hrtc.Init.AsynchPrediv = 127; hrtc.Init.SynchPrediv = 255; 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(); } / USER CODE BEGIN Check_RTC_BKUP / if (HAL_RTCEx_BKUPRead(&hrtc, RTC_BKP_DR0) != CALENDAR_INITIALIZED) { / Write magic value RTC Backup data Register0 / HAL_RTCEx_BKUPWrite(&hrtc, RTC_BKP_DR0, CALENDAR_INITIALIZED); / USER CODE END Check_RTC_BKUP / /* Initialize RTC and set the Time and Date / sTime.Hours = 0x0; sTime.Minutes = 0x0; sTime.Seconds = 0x0; sTime.DayLightSaving = RTC_DAYLIGHTSAVING_NONE; sTime.StoreOperation = RTC_STOREOPERATION_RESET; if (HAL_RTC_SetTime(&hrtc, &sTime, RTC_FORMAT_BCD) != HAL_OK) { Error_Handler(); } sDate.WeekDay = RTC_WEEKDAY_MONDAY; sDate.Month = RTC_MONTH_JANUARY; sDate.Date = 0x1; sDate.Year = 0x0; if (HAL_RTC_SetDate(&hrtc, &sDate, RTC_FORMAT_BCD) != HAL_OK) { Error_Handler(); } /* Enable the WakeUp / __HAL_RTC_WAKEUPTIMER_CLEAR_FLAG(&hrtc, RTC_FLAG_WUTF); if (HAL_RTCEx_SetWakeUpTimer_IT(&hrtc, 300, RTC_WAKEUPCLOCK_CK_SPRE_16BITS) != HAL_OK) { Error_Handler(); } / USER CODE BEGIN RTC_Init 2 / } //Disable the Wakeup Timer on boot if (HAL_RTCEx_DeactivateWakeUpTimer(&hrtc)) { Error_Handler(); } / USER CODE END RTC_Init 2 / } 我的设定时间 () void RtcUTimeUpdateSntp(time_t timestamp) { RTC_DateTypeDef sdatestructure; RTC_TimeTypeDef stimestructure; struct tm ts; char temp[2] = {0, 0}; / convert SNTP time (seconds since 01-01-1900 to 01-01-1970) EPOCH_TIME_DIFF is equivalent to 70 years in sec calculated with www.epochconverter.com/date-difference This constant is used to delete difference between : Epoch converter (referenced to 1970) and SNTP (referenced to 1900) / / convert time in yy/mm/dd hh:mm:sec / ts = localtime(×tamp); ts.tm_isdst=1; //indicate DST is in effect printf("After converting from timestamp %02d:%02d:%02drn",ts.tm_hour,ts.tm_min, ts.tm_sec); /* convert date composants to hex format / sprintf(temp, "%ld", (unsigned long)(ts.tm_year - 100)); sdatestructure.Year = strtol(temp, NULL, 16); sprintf(temp, "%ld", (unsigned long) (ts.tm_mon + 1)); sdatestructure.Month = strtol(temp, NULL, 16); sprintf(temp, "%d", ts.tm_mday); sdatestructure.Date = strtol(temp, NULL, 16); / dummy weekday / sdatestructure.WeekDay =0x00; if (HAL_RTC_SetDate(&hrtc, &sdatestructure, RTC_FORMAT_BCD) != HAL_OK) { Error_Handler(); } / convert time composants to hex format / sprintf(temp,"%d", ts.tm_hour); stimestructure.Hours = strtol(temp, NULL, 16); sprintf(temp,"%d", ts.tm_min); stimestructure.Minutes = strtol(temp, NULL, 16); sprintf(temp, "%d", ts.tm_sec); stimestructure.Seconds = strtol(temp, NULL, 16); stimestructure.DayLightSaving=1; if (HAL_RTC_SetTime(&hrtc, &stimestructure, RTC_FORMAT_BCD) != HAL_OK) { Error_Handler(); } } 我的阅读时间 () uint64_t RtcUGetTimeUnix(void) { RTC_TimeTypeDef RTC_Time; RTC_DateTypeDef RTC_Date; HAL_RTC_GetTime(&hrtc,&RTC_Time,RTC_FORMAT_BCD); HAL_RTC_GetDate(&hrtc,&RTC_Date,RTC_FORMAT_BCD); printf("%02x-%02x-20%02x / %02x:%02x:%02xrn", RTC_Date.Date, RTC_Date.Month, RTC_Date.Year,RTC_Time.Hours,RTC_Time.Minutes,RTC_Time.Seconds); HAL_RTC_GetTime(&hrtc,&RTC_Time,RTC_FORMAT_BIN); HAL_RTC_GetDate(&hrtc,&RTC_Date,RTC_FORMAT_BIN); uint8_t hh = RTC_Time.Hours; uint8_t mm = RTC_Time.Minutes; uint8_t ss = RTC_Time.Seconds; uint8_t d = RTC_Date.Date; uint8_t m = RTC_Date.Month; uint16_t y = RTC_Date.Year; uint16_t yr = (uint16_t)(y+2000-1900); struct tm tim = {0}; tim.tm_year = yr; tim.tm_mon = m - 1; tim.tm_mday = d; tim.tm_hour = hh; tim.tm_min = mm; tim.tm_sec = ss; time_t currentTime = {0}; currentTime = mktime(&tim); / tim = gmtime(currentTime); currentTime = mktime() / / Return number of seconds since Unix Epoch (1/1/1970 00:00:00). */ return (uint64_t)currentTime; } 0
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答案对人有帮助，有参考价值 0 在 RtcUTimeUpdateSntp 中，填写所有的 sdatestructure 和 stimestructure 字段，或者像在 MX_RTC_Init 中那样定义时将这些结构初始化为零。

2022-12-7 09:40:16 评论举报陈思远