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[mini2440]rtc clean up
git-svn-id: https://rt-thread.googlecode.com/svn/trunk@518 bbd45198-f89e-11dd-88c7-29a3b14d5316
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qiuyiuestc
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3693e2cd90
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@ -9,32 +9,38 @@
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*
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* Change Logs:
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* Date Author Notes
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* 2009-04-26 yi.qiu first version
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* 2010-03-18 Gary Lee add functions such as GregorianDay
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* and rt_rtc_time_to_tm
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* 2009-04-26 yi.qiu first version
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* 2010-03-18 Gary Lee add functions such as GregorianDay
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* and rt_rtc_time_to_tm
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* 2009-03-20 yi.qiu clean up
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*/
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#include <rtthread.h>
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#include <time.h>
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#include <s3c24x0.h>
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#include "rtc.h"
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#define RTC_DEBUG
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#define RTC_ENABLE (RTCCON |= 0x01); /*RTC read and write enable */
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#define RTC_DISABLE (RTCCON &= ~0x01); /* RTC read and write disable */
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#define BCD2BIN(n) (((((n) >> 4) & 0x0F) * 10) + ((n) & 0x0F))
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#define BIN2BCD(n) ((((n) / 10) << 4) | ((n) % 10))
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/**
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* This function get rtc time
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*/
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void rt_hw_rtc_get(struct rtc_time *ti)
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void rt_hw_rtc_get(struct tm *ti)
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{
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rt_uint8_t sec, min, hour, mday, wday, mon, year;
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/* enable access to RTC registers */
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RTC_ENABLE();
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RTC_ENABLE
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/* read RTC registers */
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do
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{
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sec = BCDSEC;
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min = BCDMIN;
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sec = BCDSEC;
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min = BCDMIN;
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hour = BCDHOUR;
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mday = BCDDATE;
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wday = BCDDAY;
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@ -43,7 +49,7 @@ void rt_hw_rtc_get(struct rtc_time *ti)
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} while (sec != BCDSEC);
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/* disable access to RTC registers */
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RTC_DISABLE();
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RTC_DISABLE
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ti->tm_sec = BCD2BIN(sec & 0x7F);
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ti->tm_min = BCD2BIN(min & 0x7F);
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@ -59,20 +65,20 @@ void rt_hw_rtc_get(struct rtc_time *ti)
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/**
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* This function set rtc time
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*/
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void rt_hw_rtc_set(struct rtc_time *ti)
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void rt_hw_rtc_set(struct tm *ti)
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{
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rt_uint8_t sec, min, hour, mday, wday, mon, year;
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year = BIN2BCD(ti->tm_year);
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year = BIN2BCD(ti->tm_year);
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mon = BIN2BCD(ti->tm_mon);
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wday = BIN2BCD(ti->tm_wday);
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mday = BIN2BCD(ti->tm_mday);
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hour = BIN2BCD(ti->tm_hour);
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min = BIN2BCD(ti->tm_min);
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sec = BIN2BCD(ti->tm_sec);
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min = BIN2BCD(ti->tm_min);
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sec = BIN2BCD(ti->tm_sec);
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/* enable access to RTC registers */
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RTC_ENABLE();
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RTC_ENABLE
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/* write RTC registers */
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BCDSEC = sec;
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@ -80,11 +86,11 @@ void rt_hw_rtc_set(struct rtc_time *ti)
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BCDHOUR = hour;
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BCDDATE = mday;
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BCDDAY = wday;
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BCDMON = mon;
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BCDMON = mon;
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BCDYEAR = year;
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/* disable access to RTC registers */
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RTC_DISABLE();
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RTC_DISABLE
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}
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/**
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@ -96,95 +102,16 @@ void rt_hw_rtc_reset (void)
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RTCCON &= ~(0x08|0x01);
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}
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/*
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* This only works for the Gregorian calendar - i.e. after 1752 (in the UK)
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*/
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void GregorianDay(struct rtc_time * tm)
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{
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int leapsToDate;
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int lastYear;
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int day;
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int MonthOffset[] = { 0,31,59,90,120,151,181,212,243,273,304,334 };
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lastYear=tm->tm_year-1;
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/*
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* Number of leap corrections to apply up to end of last year
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*/
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leapsToDate = lastYear/4 - lastYear/100 + lastYear/400;
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/*
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* This year is a leap year if it is divisible by 4 except when it is
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* divisible by 100 unless it is divisible by 400
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*
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* e.g. 1904 was a leap year, 1900 was not, 1996 is, and 2000 will be
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*/
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if((tm->tm_year%4==0) &&
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((tm->tm_year%100!=0) || (tm->tm_year%400==0)) &&
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(tm->tm_mon>2)) {
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/*
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* We are past Feb. 29 in a leap year
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*/
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day=1;
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} else {
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day=0;
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}
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day += lastYear*365 + leapsToDate + MonthOffset[tm->tm_mon-1] + tm->tm_mday;
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tm->tm_wday=day%7;
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}
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void rt_rtc_time_to_tm(rt_uint32_t tim, struct rtc_time *tm)
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{
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register int i;
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register long hms, day;
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day = tim / SECDAY;
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hms = tim % SECDAY;
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/* Hours, minutes, seconds are easy */
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tm->tm_hour = hms / 3600;
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tm->tm_min = (hms % 3600) / 60;
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tm->tm_sec = (hms % 3600) % 60;
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/* Number of years in days */
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for (i = STARTOFTIME; day >= days_in_year(i); i++) {
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day -= days_in_year(i);
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}
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tm->tm_year = i;
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/* Number of months in days left */
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if (LEAP_YEAR(tm->tm_year)) {
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days_in_month(FEBRUARY) = 29;
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}
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for (i = 1; day >= days_in_month(i); i++) {
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day -= days_in_month(i);
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}
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days_in_month(FEBRUARY) = 28;
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tm->tm_mon = i;
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/* Days are what is left over (+1) from all that. */
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tm->tm_mday = day + 1;
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/*
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* Determine the day of week
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*/
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GregorianDay(tm);
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}
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static struct rt_device rtc;
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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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RTC_ENABLE();
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RTC_ENABLE
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return RT_EOK;
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}
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static rt_err_t rt_rtc_close(rt_device_t dev)
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{
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RTC_DISABLE();
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RTC_DISABLE
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return RT_EOK;
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}
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@ -195,10 +122,10 @@ static rt_size_t rt_rtc_read(rt_device_t dev, rt_off_t pos, void* buffer, rt_siz
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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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struct rtc_time* time;
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struct tm* time;
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RT_ASSERT(dev != RT_NULL);
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time = (struct rtc_time*)args;
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time = (struct tm*)args;
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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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@ -258,7 +185,7 @@ time_t time(time_t* t)
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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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struct rtc_time ti;
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struct tm ti;
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rt_device_t device;
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device = rt_device_find("rtc");
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@ -275,7 +202,7 @@ FINSH_FUNCTION_EXPORT(set_date, set date(year, month, day))
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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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struct rtc_time ti;
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struct tm ti;
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rt_device_t device;
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device = rt_device_find("rtc");
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@ -283,7 +210,7 @@ void set_time(rt_uint32_t hour, rt_uint32_t minute, rt_uint32_t second)
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{
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rt_rtc_control(device, RT_DEVICE_CTRL_RTC_GET_TIME, &ti);
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ti.tm_hour = hour;
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ti.tm_min = minute;
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ti.tm_min = minute;
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ti.tm_sec = second;
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rt_rtc_control(device, RT_DEVICE_CTRL_RTC_SET_TIME, &ti);
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}
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@ -299,4 +226,3 @@ void list_date(void)
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}
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FINSH_FUNCTION_EXPORT(list_date, list date)
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#endif
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@ -1,51 +1,21 @@
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#ifndef __RT_HW_SERIAL_H__
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#define __RT_HW_SERIAL_H__
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/*
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* File : rtc.h
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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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* 2010-03-20 yi.qiu the first version
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*/
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#include <rthw.h>
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#include <rtthread.h>
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#ifndef __RTC_H__
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#define __RTC_H__
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#include "s3c24x0.h"
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#define RTC_DEBUG
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#define RTC_ENABLE() (RTCCON |= 0x01) //RTC read and write enable
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#define RTC_DISABLE() (RTCCON &= ~0x01) //RTC read and write disable
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#define BCD2BIN(n) (((((n) >> 4) & 0x0F) * 10) + ((n) & 0x0F))
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#define BIN2BCD(n) ((((n) / 10) << 4) | ((n) % 10))
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#define LEAPS_THRU_END_OF(y) ((y)/4 - (y)/100 + (y)/400)
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#define LEAP_YEAR(year) ((!(year % 4) && (year % 100)) || !(year % 400))
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#define FEBRUARY 2
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#define STARTOFTIME 1970
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#define SECDAY 86400L
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#define SECYR (SECDAY * 365)
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#define days_in_year(a) (LEAP_YEAR(a) ? 366 : 365)
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#define days_in_month(a) (month_days[(a) - 1])
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static unsigned char month_days[] =
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{
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31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
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};
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struct rtc_time
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{
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int tm_sec;
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int tm_min;
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int tm_hour;
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int tm_mday;
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int tm_mon;
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int tm_year;
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int tm_wday;
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int tm_yday;
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int tm_isdst;
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};
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void rt_hw_rtc_get (struct rtc_time *tmp);
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void rt_hw_rtc_set (struct rtc_time *tmp);
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void rt_hw_rtc_reset (void);
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void GregorianDay (struct rtc_time *);
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void rt_rtc_time_to_tm(rt_uint32_t tim, struct rtc_time *tm);
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void rt_hw_rtc_init(void);
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#endif
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