RTC

RTC communication interface. More...

Collaboration diagram for RTC:

Modules
	External RTC
	RTC on CARME mainboard.

Files
file	rtc.h
	RTC interface. Communication interface to use the RTC from the CARME-M4.
file	rtc.c
	Communication interface to use the RTC on the controller.

Data Structures
struct	_CARME_RTC_TIME_t
	Structure to store a full date and time. More...

Macros
#define	CARME_ERROR_RTC   CARME_ERROR_RTC_BASE + 0
#define	CARME_RTC_USE_WAKEUP_ISR   0
#define	CARME_RTC_STATE_REG   RTC_BKP_DR0
#define	CARME_RTC_STATE_INIT_OK   0x35AC
#define	CARME_RTC_STATE_TIME_OK   0xA3C5

Typedefs
typedef struct _CARME_RTC_TIME_t	CARME_RTC_TIME_t
	Structure to store a full date and time.

Functions
void	CARME_RTC_Init (void)
	Initialize and start the internal RTC of the STM32F4xx. The date and time is set from the external RTC on the mainboard. More...
ERROR_CODES	CARME_RTC_SetTime (CARME_RTC_TIME_t *time)
	Set the internal rtc date and time. More...
void	CARME_RTC_GetTime (CARME_RTC_TIME_t *time)
	Get the date and time from the internal rtc. More...
uint32_t	get_fattime (void)
	Get the time from the RTC. This function is used from the FatFs and the function prototype is given by the FatFs module. More...

Detailed Description

RTC communication interface.

Macro Definition Documentation

#define CARME_ERROR_RTC   CARME_ERROR_RTC_BASE + 0

Common RTC error

Definition at line 83 of file rtc.h.

#define CARME_RTC_STATE_INIT_OK   0x35AC

RTC initialized

Definition at line 86 of file rtc.c.

#define CARME_RTC_STATE_REG   RTC_BKP_DR0

Status register

Definition at line 85 of file rtc.c.

#define CARME_RTC_STATE_TIME_OK   0xA3C5

RTC set

Definition at line 87 of file rtc.c.

#define CARME_RTC_USE_WAKEUP_ISR   0

Disable wakeup interrupt

Definition at line 86 of file rtc.h.

Function Documentation

void CARME_RTC_GetTime

(

CARME_RTC_TIME_t *

time

)

Get the date and time from the internal rtc.

Parameters

[out]

time

Buffer structure to save the date and time.

Returns

None

Definition at line 204 of file rtc.c.

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void CARME_RTC_Init

(

void

)

Initialize and start the internal RTC of the STM32F4xx.
The date and time is set from the external RTC on the mainboard.

Returns

None

Examples:

sdcard.c.

Definition at line 105 of file rtc.c.

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ERROR_CODES CARME_RTC_SetTime

(

CARME_RTC_TIME_t *

time

)

Set the internal rtc date and time.

Parameters

[in]

time

Date and time to write to the internal rtc.

Returns

ERROR_CODES

• CARME_NO_ERROR
• CARME_ERROR_RTC

Definition at line 167 of file rtc.c.

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uint32_t get_fattime

(

void

)

Get the time from the RTC.
This function is used from the FatFs and the function prototype is given by the FatFs module.

Returns

Bit 25 to 31: Year from 1980 (0..127)
Bit 21 to 24: Month (1..12)
Bit 16 to 20: Day in month (1..31)
Bit 11 to 15: Hour (0..23)
Bit 5 to 10: Minute (0..59)
Bit 1 to 4: Second / 2 (0..29)

Definition at line 326 of file rtc.c.

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