RTC.c

#include "dr7f701401.dvf.h"
#include "RTC.h"
#include <string.h>


volatile RTC_Information_st_t g_stRTCInformation;
#define RTC_TIME_OUT_COUNT 500U
/* BCD Convert   decimalism*/
/*The valid range of parameters is not judged*/
static uint8_t RTC_BCD_To_Dec(uint8_t u8RTCBCD)
{
	uint8_t u8RTCData = ((u8RTCBCD >> 4U) * 10U) + (u8RTCBCD & 0X0FU);
	return u8RTCData;
}
/* decimalism Convert  BCD */
static uint8_t RTC_Dec_To_BCD(uint8_t u8RTCDec)
{
	uint8_t u8RTCData = (((u8RTCDec / 10U) % 10U) << 4U) + (u8RTCDec % 10U);
	return u8RTCData;
}
static void RTC_Stop(void)
{
	uint16_t u16RTCCount = 0U;
	/*Stop sub-counter */
	RTCA0CE = 0U;
	/*Wait  sub-counter  stop*/
	while ((RTCA0CEST != 0) && (u16RTCCount < RTC_TIME_OUT_COUNT))
	{
		u16RTCCount++;
	}
}

void RTC_Pre_Init(void)
{
	uint16_t u16RTCCount = 0U;
	RTC_Stop(); /* Stop RTCA*/

#if (RTC_MODE_SELECT == RTC_MODE_MAIN)
	RTCA0SLSB = 1U;			   /*Frequency selection mode*/
	RTCA0SCMP = 4000277U - 1U; /*4M*/
	/*4000000:1小时快0.5s*/
	/*4000543:1小时慢0.333秒*/
	//543*0.5/0.8333= 325   4000325:17小时慢2s  1小时慢0.1176秒
	//4000276 是按1小时慢0.0001算的 但是给4000277
#else
	RTCA0SLSB = 0U; /*32.768 kHz mode*/
	RTCA0SUBU = 0U; /*Reserved Later modified,Error Correction*/
#endif

	RTCA0AMPM = 1U; /*fix 24Hour Format*/

	/*Write start values*/
	RTCA0YEAR = RTC_Dec_To_BCD(RTC_DEFAULT_YEAR);
	RTCA0MONTH = RTC_Dec_To_BCD(RTC_DEFAULT_MONTH);
	RTCA0DAY = RTC_Dec_To_BCD(RTC_DEFAULT_DATE);
	RTCA0HOUR = RTC_Dec_To_BCD(RTC_DEFAULT_HOUR);
	RTCA0MIN = RTC_Dec_To_BCD(RTC_DEFAULT_MINUTE);
	RTCA0SEC = RTC_Dec_To_BCD(RTC_DEFAULT_SECOND);

	/*Starts sub-counter*/
	RTCA0CE = 1U;
	u16RTCCount = 0U;
	/*Wait  sub-counter  enable*/
	while ((RTCA0CEST != 1U) && (u16RTCCount < RTC_TIME_OUT_COUNT))
	{
		u16RTCCount++;
	}
}

void RTC_Set_Time(RTC_Information_st_t *pstRTCTime)
{
	uint16_t u16RTCCount = 0U;
	while ((RTCA0WST != 0U) && (u16RTCCount < RTC_TIME_OUT_COUNT)) /*Check that all clock counters are running.*/
	{
		u16RTCCount++;
	}
	RTCA0WAIT = 1U; /*Stop all clock counters*/
	u16RTCCount = 0U;
	while ((RTCA0WST != 1U) && (u16RTCCount < RTC_TIME_OUT_COUNT)) /*Wait  all clock counters  stop*/
	{
		u16RTCCount++;
	}
	/*Write start values*/
	RTCA0YEAR = RTC_Dec_To_BCD(pstRTCTime->u8RTCYear);
	RTCA0MONTH = RTC_Dec_To_BCD(pstRTCTime->u8RTCMonth);
	RTCA0DAY = RTC_Dec_To_BCD(pstRTCTime->u8RTCDayOfMonth);
	RTCA0HOUR = RTC_Dec_To_BCD(pstRTCTime->u8RTCHour);
	RTCA0MIN = RTC_Dec_To_BCD(pstRTCTime->u8RTCMinute);
	RTCA0SEC = RTC_Dec_To_BCD(pstRTCTime->u8RTCSecond);

	/*Start all clock counters*/
	RTCA0WAIT = 0U;
	u16RTCCount = 0U;
	while ((RTCA0WST != 0U) && (u16RTCCount < RTC_TIME_OUT_COUNT)) /*Check that all clock counters are running.*/
	{
		u16RTCCount++;
	}
}

void RTC_Get_Time(void)
{
	uint16_t u16RTCCount = 0U;

	while ((RTCA0WST != 0U) && (u16RTCCount < RTC_TIME_OUT_COUNT)) /*Check that all clock counters are running.*/
	{
		u16RTCCount++;
	}
	RTCA0WAIT = 1U; /*Stop all clock counters*/
	u16RTCCount = 0U;
	while ((RTCA0WST != 1U) && (u16RTCCount < RTC_TIME_OUT_COUNT)) /*Wait  all clock counters  stop*/
	{
		u16RTCCount++;
	}
	/*Read  data*/
	g_stRTCInformation.u8RTCYear = RTC_BCD_To_Dec(RTCA0YEAR);
	g_stRTCInformation.u8RTCMonth = RTC_BCD_To_Dec(RTCA0MONTH);
	g_stRTCInformation.u8RTCDayOfMonth = RTC_BCD_To_Dec(RTCA0DAY);
	g_stRTCInformation.u8RTCHour = RTC_BCD_To_Dec(RTCA0HOUR);
	g_stRTCInformation.u8RTCMinute = RTC_BCD_To_Dec(RTCA0MIN);
	g_stRTCInformation.u8RTCSecond = RTC_BCD_To_Dec(RTCA0SEC);
	/*Start all clock counters*/
	RTCA0WAIT = 0U;
	u16RTCCount = 0U;
	while ((RTCA0WST != 0U) && (u16RTCCount < RTC_TIME_OUT_COUNT)) /*Check that all clock counters are running.*/
	{
		u16RTCCount++;
	}
}

#pragma ghs section bss=".NonInitArea"
RTC_Information_st_t RtcBackup;
uint32_t BackupNum;
#pragma ghs section bss=default
void RTC_Backup_Time(void)
{
    BackupNum++;
    RTC_Get_Time();
    memcpy((uint8_t*)&RtcBackup, (uint8_t*)&g_stRTCInformation, sizeof (RtcBackup));
}

void Rtc_Restore_Time(void)
{
    uint16_t u16RTCCount = 0U;
	RTC_Stop(); /* Stop RTCA*/

#if (RTC_MODE_SELECT == RTC_MODE_MAIN)
	RTCA0SLSB = 1U;			   /*Frequency selection mode*/
	RTCA0SCMP = 4000000U - 1U; /*4M*/
#else
	RTCA0SLSB = 0U; /*32.768 kHz mode*/
	RTCA0SUBU = 0U; /*Reserved Later modified,Error Correction*/
#endif

	RTCA0AMPM = 1U; /*fix 24Hour Format*/

	/*Write start values*/
	RTCA0YEAR = RTC_Dec_To_BCD(RtcBackup.u8RTCYear);
	RTCA0MONTH = RTC_Dec_To_BCD(RtcBackup.u8RTCMonth);
	RTCA0DAY = RTC_Dec_To_BCD(RtcBackup.u8RTCDayOfMonth);
	RTCA0HOUR = RTC_Dec_To_BCD(RtcBackup.u8RTCHour);
	RTCA0MIN = RTC_Dec_To_BCD(RtcBackup.u8RTCMinute);
	RTCA0SEC = RTC_Dec_To_BCD(RtcBackup.u8RTCSecond);

	/*Starts sub-counter*/
	RTCA0CE = 1U;
	u16RTCCount = 0U;
	/*Wait  sub-counter  enable*/
	while ((RTCA0CEST != 1U) && (u16RTCCount < RTC_TIME_OUT_COUNT))
	{
		u16RTCCount++;
	}
}