RTC

Real Time Clock. More...

Collaboration diagram for RTC:

Detailed Description

Real Time Clock.

The RTC driver provides functions to read the current time from the CMOS RTC.

See also

OSDev CMOS

Functions
static uint8_t	rtc_read (uint8_t reg)
static int	rtc_update_in_progress (void)
static uint8_t	rtc_bcd_to_bin (uint8_t bcd)
static time_t	rtc_read_epoch (void)
static uint64_t	rtc_init (const char *deviceName)

Variables
static uint8_t	centuryRegister = 0
static port_t	addressPort = 0
static port_t	dataPort = 0
static lock_t	lock = LOCK_CREATE()
static clock_source_t	source

Function Documentation

rtc_read()

static uint8_t rtc_read ( uint8_t  reg )

static

Definition at line 29 of file rtc.c.

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rtc_update_in_progress()

static int rtc_update_in_progress ( void  )

static

Definition at line 35 of file rtc.c.

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rtc_bcd_to_bin()

static uint8_t rtc_bcd_to_bin ( uint8_t  bcd )

static

Definition at line 40 of file rtc.c.

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rtc_read_epoch()

static time_t rtc_read_epoch ( void  )

static

Definition at line 45 of file rtc.c.

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rtc_init()

static uint64_t rtc_init ( const char *  deviceName )

static

Definition at line 91 of file rtc.c.

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Variable Documentation

centuryRegister

uint8_t centuryRegister = 0

static

Definition at line 23 of file rtc.c.

addressPort

port_t addressPort = 0

static

Definition at line 25 of file rtc.c.

dataPort

port_t dataPort = 0

static

Definition at line 26 of file rtc.c.

lock

lock_t lock = LOCK_CREATE()

static

Definition at line 27 of file rtc.c.

source

clock_source_t source

static

Initial value:

= {
    .name = "CMOS RTC",
    .precision = CLOCKS_PER_SEC,
    .read_ns = NULL,
    .read_epoch = rtc_read_epoch,
}

Definition at line 84 of file rtc.c.