rtc.c File Reference

Real Time Clock (RTC) driver. More...

Macros
#define	__DEBUG_HEADER__   "[RTC ]"
	Change header.
#define	__DEBUG_LEVEL__   LOGLEVEL_NOTICE
	Set log level.
#define	CMOS_ADDR   0x70
	Addess where we need to write the Address.
#define	CMOS_DATA   0x71
	Addess where we need to write the Data.

Functions
static unsigned int	rtc_are_different (tm_t *t0, tm_t *t1)
	Checks if the two time values are different. More...
static unsigned int	is_updating_rtc (void)
	Check if rtc is updating time currently. More...
static unsigned char	read_register (unsigned char reg)
	Reads the given register. More...
static void	write_register (unsigned char reg, unsigned char value)
	Writes on the given register. More...
static unsigned char	bcd2bin (unsigned char bcd)
	Transforms a Binary-Coded Decimal (BCD) to decimal. More...
static void	rtc_read_datetime (void)
	Reads the current datetime value from a real-time clock.
static void	rtc_update_datetime (void)
	Updates the internal datetime value.
static void	rtc_handler_isr (pt_regs *f)
	Callback for RTC. More...
void	gettime (tm_t *time)
	Copies the global time inside the provided variable. More...
int	rtc_initialize (void)
	Initializes the Real Time Clock (RTC). More...
int	rtc_finalize (void)
	De-initializes the Real Time Clock (RTC). More...

Variables
tm_t	global_time
	Current global time.
tm_t	previous_global_time
	Previous global time.
int	is_bcd
	Data type is BCD.

Detailed Description

Real Time Clock (RTC) driver.

Copyright

(c) 2014-2024 This file is distributed under the MIT License. See LICENSE.md for details.