rtc.c File Reference

#include "chip.h"
#include <stdint.h>
#include <assert.h>

Functions
void	RTC_SetHourMode (Rtc *pRtc, uint32_t dwMode)
	Sets the RTC in either 12 or 24 hour mode. More...
uint32_t	RTC_GetHourMode (Rtc *pRtc)
	Gets the RTC mode. More...
void	RTC_EnableIt (Rtc *pRtc, uint32_t dwSources)
	Enables the selected interrupt sources of the RTC. More...
void	RTC_DisableIt (Rtc *pRtc, uint32_t dwSources)
	Disables the selected interrupt sources of the RTC. More...
int	RTC_SetTime (Rtc *pRtc, uint8_t ucHour, uint8_t ucMinute, uint8_t ucSecond)
	Sets the current time in the RTC. More...
void	RTC_GetTime (Rtc *pRtc, uint8_t *pucHour, uint8_t *pucMinute, uint8_t *pucSecond)
	Retrieves the current time as stored in the RTC in several variables. More...
int	RTC_SetTimeAlarm (Rtc *pRtc, uint8_t *pucHour, uint8_t *pucMinute, uint8_t *pucSecond)
	Sets a time alarm on the RTC. The match is performed only on the provided variables; Setting all pointers to 0 disables the time alarm. More...
void	RTC_GetDate (Rtc *pRtc, uint16_t *pwYear, uint8_t *pucMonth, uint8_t *pucDay, uint8_t *pucWeek)
	Retrieves the current year, month and day from the RTC. Month, day and week values are numbered starting at 1. More...
int	RTC_SetDate (Rtc *pRtc, uint16_t wYear, uint8_t ucMonth, uint8_t ucDay, uint8_t ucWeek)
	Sets the current year, month and day in the RTC. Month, day and week values must be numbered starting from 1. More...
int	RTC_SetDateAlarm (Rtc *pRtc, uint8_t *pucMonth, uint8_t *pucDay)
	Sets a date alarm in the RTC. The alarm will match only the provided values; Passing a null-pointer disables the corresponding field match. More...
void	RTC_ClearSCCR (Rtc *pRtc, uint32_t dwMask)
	Clear flag bits of status clear command register in the RTC. More...
uint32_t	RTC_GetSR (Rtc *pRtc, uint32_t dwMask)
	Get flag bits of status register in the RTC. More...

Detailed Description

Implementation of Real Time Clock (RTC) controller.

Function Documentation

RTC_ClearSCCR()

void RTC_ClearSCCR	(	Rtc *	pRtc,
		uint32_t	dwMask
	)

Clear flag bits of status clear command register in the RTC.

Parameters

mask	Bits mask of cleared events

RTC_DisableIt()

void RTC_DisableIt	(	Rtc *	pRtc,
		uint32_t	dwSources
	)

Disables the selected interrupt sources of the RTC.

Parameters

sources

Interrupt sources to disable.

RTC_EnableIt()

void RTC_EnableIt	(	Rtc *	pRtc,
		uint32_t	dwSources
	)

Enables the selected interrupt sources of the RTC.

Parameters

sources

Interrupt sources to enable.

RTC_GetDate()

void RTC_GetDate	(	Rtc *	pRtc,
		uint16_t *	pwYear,
		uint8_t *	pucMonth,
		uint8_t *	pucDay,
		uint8_t *	pucWeek
	)

Retrieves the current year, month and day from the RTC. Month, day and week values are numbered starting at 1.

Parameters

pYwear	Current year (optional).
pucMonth	Current month (optional).
pucDay	Current day (optional).
pucWeek	Current day in current week (optional).

RTC_GetHourMode()

uint32_t RTC_GetHourMode

(

Rtc *

pRtc

)

Gets the RTC mode.

Returns

Hour mode.

RTC_GetSR()

uint32_t RTC_GetSR	(	Rtc *	pRtc,
		uint32_t	dwMask
	)

Get flag bits of status register in the RTC.

Parameters

mask	Bits mask of Status Register

Returns

Status register & mask

RTC_GetTime()

void RTC_GetTime	(	Rtc *	pRtc,
		uint8_t *	pucHour,
		uint8_t *	pucMinute,
		uint8_t *	pucSecond
	)

Retrieves the current time as stored in the RTC in several variables.

Parameters

pucHour	If not null, current hour is stored in this variable.
pucMinute	If not null, current minute is stored in this variable.
pucSecond	If not null, current second is stored in this variable.

RTC_SetDate()

int RTC_SetDate	(	Rtc *	pRtc,
		uint16_t	wYear,
		uint8_t	ucMonth,
		uint8_t	ucDay,
		uint8_t	ucWeek
	)

Sets the current year, month and day in the RTC. Month, day and week values must be numbered starting from 1.

Note

In successive update operations, the user must wait at least one second after resetting the UPDTIM/UPDCAL bit in the RTC_CR before setting these bits again. Please look at the RTC section of the datasheet for detail.

Parameters

wYear	Current year.
ucMonth	Current month.
ucDay	Current day.
ucWeek	Day number in current week.

Returns

0 success, 1 fail to set

RTC_SetDateAlarm()

int RTC_SetDateAlarm	(	Rtc *	pRtc,
		uint8_t *	pucMonth,
		uint8_t *	pucDay
	)

Sets a date alarm in the RTC. The alarm will match only the provided values; Passing a null-pointer disables the corresponding field match.

Parameters

pucMonth	If not null, the RTC alarm will month-match this value.
pucDay	If not null, the RTC alarm will day-match this value.

Returns

0 success, 1 fail to set

RTC_SetHourMode()

void RTC_SetHourMode	(	Rtc *	pRtc,
		uint32_t	dwMode
	)

Sets the RTC in either 12 or 24 hour mode.

Parameters

mode	Hour mode.

RTC_SetTime()

int RTC_SetTime	(	Rtc *	pRtc,
		uint8_t	ucHour,
		uint8_t	ucMinute,
		uint8_t	ucSecond
	)

Sets the current time in the RTC.

Note

In successive update operations, the user must wait at least one second after resetting the UPDTIM/UPDCAL bit in the RTC_CR before setting these bits again. Please look at the RTC section of the datasheet for detail.

Parameters

ucHour	Current hour in 12 or 24 hour mode.
ucMinute	Current minute.
ucSecond	Current second.

Returns

0 success, 1 fail to set

RTC_SetTimeAlarm()

int RTC_SetTimeAlarm	(	Rtc *	pRtc,
		uint8_t *	pucHour,
		uint8_t *	pucMinute,
		uint8_t *	pucSecond
	)

Sets a time alarm on the RTC. The match is performed only on the provided variables; Setting all pointers to 0 disables the time alarm.

Note

In AM/PM mode, the hour value must have bit #7 set for PM, cleared for AM (as expected in the time registers).

Parameters

pucHour	If not null, the time alarm will hour-match this value.
pucMinute	If not null, the time alarm will minute-match this value.
pucSecond	If not null, the time alarm will second-match this value.

Returns

0 success, 1 fail to set