RTC Class Reference

Real Time Clock. More...

#include <machine/rtc.h>

Inheritance diagram for RTC:

Static Public Member Functions
static DateTime	getDateTime ()
	Get current date and time. More...

Protected Types
enum	Interrupt {   NONE = 0,   UPDATE = 1 << 4,   ALARM = 1 << 5,   PERIODIC = 1 << 6 }
	Possible Interrupt sources. More...
enum	PeriodicFrequency {   FREQ_NONE = 0,   FREQ_8192HZ = 3,   FREQ_4096HZ = 4,   FREQ_2048HZ = 5,   FREQ_1024HZ = 6,   FREQ_512HZ = 7,   FREQ_256HZ = 8,   FREQ_128HZ = 9,   FREQ_64HZ = 10,   FREQ_32HZ = 11,   FREQ_16HZ = 12,   FREQ_8HZ = 13,   FREQ_4HZ = 14,   FREQ_2HZ = 15 }
	Frequencies for periodic interval. More...

Static Protected Member Functions
static void	setPeriodic (enum PeriodicFrequency freq)
	Set a periodic interrupt interval. More...
static void	setAlarm (uint8_t hour, uint8_t minute, uint8_t second)
	Set an alarm. More...
static void	receiveInterrupt (Interrupt i, bool enable)
	Enable or disable an interrupt source. More...
static Interrupt	getSource ()
	Get the source of the last interrupt. More...

Detailed Description

Real Time Clock.

Member Enumeration Documentation

Interrupt

enum RTC::Interrupt

protected

Possible Interrupt sources.

Enumerator
UPDATE	Time Update Ended Interrupt.
ALARM	Alarm Interrupt.
PERIODIC	Periodic Timer Interrupt.

PeriodicFrequency

enum RTC::PeriodicFrequency

protected

Frequencies for periodic interval.

Enumerator
FREQ_8192HZ	122.070 µs
FREQ_4096HZ	244.141 µs
FREQ_2048HZ	488.281 µs
FREQ_1024HZ	976.562 µs
FREQ_512HZ	1.953125 ms
FREQ_256HZ	3.90625 ms
FREQ_128HZ	7.8125 ms
FREQ_64HZ	15.625 ms
FREQ_32HZ	31.25 ms
FREQ_16HZ	62.5 ms
FREQ_8HZ	125 ms
FREQ_4HZ	250 ms
FREQ_2HZ	500 ms

Member Function Documentation

setPeriodic()

void RTC::setPeriodic ( enum PeriodicFrequency  freq )

staticprotected

Set a periodic interrupt interval.

Note

You can safely ignore this method

Parameters

freq

Frequency

setAlarm()

void RTC::setAlarm ( uint8_t  hour, uint8_t  minute, uint8_t  second  )

staticprotected

Set an alarm.

Note

You can safely ignore this method

Parameters

hour	Hour
minute	Minute
second	Second

receiveInterrupt()

void RTC::receiveInterrupt ( Interrupt  i, bool  enable  )

staticprotected

Enable or disable an interrupt source.

Parameters

i	Interrupt source
enable	true to enable source, false to disable it.

getSource()

RTC::Interrupt RTC::getSource ( )

staticprotected

Get the source of the last interrupt.

Returns

Interrupt source

getDateTime()

DateTime RTC::getDateTime ( )

static

Get current date and time.

Note

You have to detect clock updates while fetching the time, or you might have an error.

Returns

current date and time

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The documentation for this class was generated from the following files:

• machine/rtc.h
• machine/rtc.cc