344 lines
8.5 KiB
C
344 lines
8.5 KiB
C
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/*
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* File : rtc.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2009, RT-Thread Development Team
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rt-thread.org/license/LICENSE
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*
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* Change Logs:
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* Date Author Notes
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* 2009-01-05 Bernard the first version
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* 2011-11-26 aozima implementation time.
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*/
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#include <rtthread.h>
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#include <stm32f2xx.h>
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#include <time.h>
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__IO uint32_t AsynchPrediv = 0, SynchPrediv = 0;
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RTC_TimeTypeDef RTC_TimeStructure;
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RTC_InitTypeDef RTC_InitStructure;
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RTC_AlarmTypeDef RTC_AlarmStructure;
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RTC_DateTypeDef RTC_DateStructure;
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#define MINUTE 60
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#define HOUR (60*MINUTE)
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#define DAY (24*HOUR)
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#define YEAR (365*DAY)
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static int month[12] =
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{
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0,
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DAY*(31),
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DAY*(31+29),
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DAY*(31+29+31),
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DAY*(31+29+31+30),
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DAY*(31+29+31+30+31),
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DAY*(31+29+31+30+31+30),
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DAY*(31+29+31+30+31+30+31),
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DAY*(31+29+31+30+31+30+31+31),
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DAY*(31+29+31+30+31+30+31+31+30),
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DAY*(31+29+31+30+31+30+31+31+30+31),
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DAY*(31+29+31+30+31+30+31+31+30+31+30)
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};
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static struct rt_device rtc;
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static time_t rt_mktime(struct tm *tm)
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{
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long res;
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int year;
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year = tm->tm_year - 70;
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res = YEAR * year + DAY * ((year + 1) / 4);
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res += month[tm->tm_mon];
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if (tm->tm_mon > 1 && ((year + 2) % 4))
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res -= DAY;
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res += DAY * (tm->tm_mday - 1);
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res += HOUR * tm->tm_hour;
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res += MINUTE * tm->tm_min;
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res += tm->tm_sec;
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return res;
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}
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static rt_err_t rt_rtc_open(rt_device_t dev, rt_uint16_t oflag)
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{
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if (dev->rx_indicate != RT_NULL)
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{
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/* Open Interrupt */
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}
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return RT_EOK;
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}
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static rt_size_t rt_rtc_read(rt_device_t dev, rt_off_t pos, void* buffer, rt_size_t size)
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{
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return 0;
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}
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static rt_err_t rt_rtc_control(rt_device_t dev, rt_uint8_t cmd, void *args)
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{
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time_t *time;
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struct tm ti,*to;
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RT_ASSERT(dev != RT_NULL);
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switch (cmd)
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{
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case RT_DEVICE_CTRL_RTC_GET_TIME:
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time = (time_t *)args;
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/* read device */
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//RTC_GetTimeStamp(RTC_Format_BIN, &RTC_TimeStructure, &RTC_DateStructure);
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RTC_GetTime(RTC_Format_BIN, &RTC_TimeStructure);
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RTC_GetDate(RTC_Format_BIN, &RTC_DateStructure);
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ti.tm_sec = RTC_TimeStructure.RTC_Seconds;
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ti.tm_min = RTC_TimeStructure.RTC_Minutes;
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ti.tm_hour = RTC_TimeStructure.RTC_Hours;
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//ti.tm_wday = (RTC_DateStructure.RTC_WeekDay==7)?0:RTC_DateStructure.RTC_WeekDay;
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ti.tm_mon = RTC_DateStructure.RTC_Month -1;
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ti.tm_mday = RTC_DateStructure.RTC_Date;
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ti.tm_year = RTC_DateStructure.RTC_Year + 70;
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*time = rt_mktime(&ti);
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//*time = RTC_GetCounter();
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break;
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case RT_DEVICE_CTRL_RTC_SET_TIME:
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{
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time = (time_t *)args;
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/* Enable the PWR clock */
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
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/* Allow access to RTC */
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PWR_BackupAccessCmd(ENABLE);
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/* Wait until last write operation on RTC registers has finished */
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//RTC_WaitForLastTask();
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/* Change the current time */
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//RTC_SetCounter(*time);
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to = localtime(time);
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RTC_TimeStructure.RTC_Seconds = to->tm_sec;
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RTC_TimeStructure.RTC_Minutes = to->tm_min;
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RTC_TimeStructure.RTC_Hours = to->tm_hour;
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//RTC_DateStructure.RTC_WeekDay =(ti->tm_wday==0)?7:ti->tm_wday;
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RTC_DateStructure.RTC_Month = to->tm_mon + 1;
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RTC_DateStructure.RTC_Date = to->tm_mday;
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RTC_DateStructure.RTC_Year = to->tm_year - 70;
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RTC_SetTime(RTC_Format_BIN, &RTC_TimeStructure);
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RTC_SetDate(RTC_Format_BIN, &RTC_DateStructure);
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/* Wait until last write operation on RTC registers has finished */
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//RTC_WaitForLastTask();
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RTC_WriteBackupRegister(RTC_BKP_DR1, 0xA5A5);
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//BKP_WriteBackupRegister(BKP_DR1, 0xA5A5);
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}
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break;
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}
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return RT_EOK;
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}
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/*******************************************************************************
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* Function Name : RTC_Configuration
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* Description : Configures the RTC.
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* Input : None
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* Output : None
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* Return : 0 reday,-1 error.
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*******************************************************************************/
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int RTC_Config(void)
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{
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u32 count=0x200000;
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/* Enable the PWR clock */
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
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/* Allow access to RTC */
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PWR_BackupAccessCmd(ENABLE);
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RCC_LSEConfig(RCC_LSE_ON);
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/* Wait till LSE is ready */
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while ( (RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET) && (--count) );
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if ( count == 0 )
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{
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return -1;
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}
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/* Select the RTC Clock Source */
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RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE);
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SynchPrediv = 0xFF;
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AsynchPrediv = 0x7F;
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/* Enable the RTC Clock */
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RCC_RTCCLKCmd(ENABLE);
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/* Wait for RTC APB registers synchronisation */
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RTC_WaitForSynchro();
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/* Enable The TimeStamp */
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//RTC_TimeStampCmd(RTC_TimeStampEdge_Falling, ENABLE);
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return 0;
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}
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int RTC_Configuration(void)
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{
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if(RTC_Config() < 0 )
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return -1;
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/* Set the Time */
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RTC_TimeStructure.RTC_Hours = 0;
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RTC_TimeStructure.RTC_Minutes = 0;
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RTC_TimeStructure.RTC_Seconds = 0;
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/* Set the Date */
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RTC_DateStructure.RTC_Month = 1;
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RTC_DateStructure.RTC_Date = 1;
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RTC_DateStructure.RTC_Year = 0;
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RTC_DateStructure.RTC_WeekDay = 4;
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/* Calendar Configuration */
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RTC_InitStructure.RTC_AsynchPrediv = AsynchPrediv;
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RTC_InitStructure.RTC_SynchPrediv = SynchPrediv;
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RTC_InitStructure.RTC_HourFormat = RTC_HourFormat_24;
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RTC_Init(&RTC_InitStructure);
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/* Set Current Time and Date */
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RTC_SetTime(RTC_Format_BCD, &RTC_TimeStructure);
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RTC_SetDate(RTC_Format_BCD, &RTC_DateStructure);
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if (RTC_Init(&RTC_InitStructure) == ERROR)
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return -1;
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return 0;
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}
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void rt_hw_rtc_init(void)
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{
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rtc.type = RT_Device_Class_RTC;
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if (RTC_ReadBackupRegister(RTC_BKP_DR1) != 0xA5A5)
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{
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rt_kprintf("rtc is not configured\n");
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rt_kprintf("please configure with set_date and set_time\n");
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if ( RTC_Configuration() != 0)
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{
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rt_kprintf("rtc configure fail...\r\n");
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return ;
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}
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}
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else
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{
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/* Wait for RTC registers synchronization */
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RTC_WaitForSynchro();
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}
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/* register rtc device */
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rtc.init = RT_NULL;
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rtc.open = rt_rtc_open;
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rtc.close = RT_NULL;
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rtc.read = rt_rtc_read;
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rtc.write = RT_NULL;
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rtc.control = rt_rtc_control;
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/* no private */
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rtc.user_data = RT_NULL;
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rt_device_register(&rtc, "rtc", RT_DEVICE_FLAG_RDWR);
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return;
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}
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#include <time.h>
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#if defined (__IAR_SYSTEMS_ICC__) && (__VER__) >= 6020000 /* for IAR 6.2 later Compiler */
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#pragma module_name = "?time"
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time_t (__time32)(time_t *t) /* Only supports 32-bit timestamp */
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#else
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time_t time(time_t* t)
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#endif
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{
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rt_device_t device;
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time_t time=0;
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device = rt_device_find("rtc");
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if (device != RT_NULL)
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{
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rt_device_control(device, RT_DEVICE_CTRL_RTC_GET_TIME, &time);
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if (t != RT_NULL) *t = time;
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}
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return time;
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}
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#ifdef RT_USING_FINSH
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#include <finsh.h>
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void set_date(rt_uint32_t year, rt_uint32_t month, rt_uint32_t day)
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{
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time_t now;
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struct tm* ti;
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rt_device_t device;
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ti = RT_NULL;
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/* get current time */
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time(&now);
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ti = localtime(&now);
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if (ti != RT_NULL)
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{
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ti->tm_year = year - 1900;
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ti->tm_mon = month - 1; /* ti->tm_mon = month; */
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ti->tm_mday = day;
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}
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now = mktime(ti);
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device = rt_device_find("rtc");
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if (device != RT_NULL)
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{
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rt_rtc_control(device, RT_DEVICE_CTRL_RTC_SET_TIME, &now);
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}
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}
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FINSH_FUNCTION_EXPORT(set_date, set date. e.g: set_date(2010,2,28))
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void set_time(rt_uint32_t hour, rt_uint32_t minute, rt_uint32_t second)
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{
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time_t now;
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struct tm* ti;
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rt_device_t device;
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ti = RT_NULL;
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/* get current time */
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time(&now);
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ti = localtime(&now);
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if (ti != RT_NULL)
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{
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ti->tm_hour = hour;
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ti->tm_min = minute;
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ti->tm_sec = second;
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}
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now = mktime(ti);
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device = rt_device_find("rtc");
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if (device != RT_NULL)
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{
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rt_rtc_control(device, RT_DEVICE_CTRL_RTC_SET_TIME, &now);
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}
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}
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FINSH_FUNCTION_EXPORT(set_time, set time. e.g: set_time(23,59,59))
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void list_date()
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{
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time_t now;
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time(&now);
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rt_kprintf("%s\n", ctime(&now));
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}
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FINSH_FUNCTION_EXPORT(list_date, show date and time.)
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#endif
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