Rtc146818 Class Reference

Device model for the MC146818 realtime clock. More...

Inheritance diagram for Rtc146818:

Public Member Functions
void	reset (MessageTime &time)
bool	receive (MessageIOIn &msg)
bool	receive (MessageIOOut &msg)
bool	receive (MessageIrqNotify &msg)
bool	receive (MessageTimeout &msg)
	Rtc146818 (DBus< MessageTimer > &bus_timer, DBus< MessageIrqLines > &bus_irqlines, Clock *clock, unsigned timer, unsigned short iobase, unsigned irq)
Public Member Functions inherited from StaticReceiver< Rtc146818 >
	StaticReceiver ()
Public Member Functions inherited from Device
void	debug_dump ()
	Device (const char *debug_name)

Private Types
enum	{ FREQ = 32768, tBUC = 8, tUC = 65 }
	Timing: More...

Private Member Functions
unsigned char	convert_bcd (unsigned char value)
unsigned char	ram (unsigned char index)
	Read values from RAM and convert time information from BCD and 12h format.
int	get_divider ()
timevalue	get_counter ()
unsigned	get_periodic_tics ()
void	set_irqflags (unsigned char value)
	Set the IRQ flags and raise an IRQ if needed.
timevalue	get_ram_time ()
	Return the time from the RAM locations.
void	update_ram (timevalue seconds)
	Update the time with the given seconds.
timevalue	next_alarm (timevalue seconds)
	Returns the time of the next alarm in seconds.
unsigned	update_cycle (timevalue now)
	Performs an update cycle and updates the time in the RAM.
void	update_timer (timevalue last_seconds, timevalue now)
	Reprogram the next timer.

Private Attributes
DBus< MessageTimer > &	_bus_timer
DBus< MessageIrqLines > &	_bus_irqlines
Clock *	_clock
unsigned	_timer
unsigned short	_iobase
unsigned	_irq
unsigned char	_index
unsigned char	_ram [128]
timevalue	_offset
timevalue	_last

Friends
class	RtcTest

Additional Inherited Members
Static Public Member Functions inherited from StaticReceiver< Rtc146818 >
static bool	receive_static (Device *o, M &msg)

Detailed Description

Device model for the MC146818 realtime clock.

State: testing Features: 128byte RAM, gettime, updatetime, UIE, alarm, periodic-irqs, divider Missing: daylight-saving Unused: sqw-output Documentation: rtc82885.pdf, MC146818AS.pdf, Intel ICH{3-7} documentation

Member Enumeration Documentation

anonymous enum

private

Timing:

1. seconds are updated at us == 0
2. UIP is set from [FREQ-tBUC-tUC, FREQ-1]
3. the update happens from [FREQ-tUC, FREQ-1]
4. the periodic IRQ happens at (period/2, 3*period/2,) ...

Enumerator:

FREQ
tBUC
tUC

Constructor & Destructor Documentation

Rtc146818::Rtc146818 ( DBus< MessageTimer > &  bus_timer, DBus< MessageIrqLines > &  bus_irqlines, Clock *  clock, unsigned  timer, unsigned short  iobase, unsigned  irq  )

inline

Member Function Documentation

unsigned char Rtc146818::convert_bcd ( unsigned char  value )

inlineprivate

timevalue Rtc146818::get_counter ( )

inlineprivate

int Rtc146818::get_divider ( )

inlineprivate

unsigned Rtc146818::get_periodic_tics ( )

inlineprivate

timevalue Rtc146818::get_ram_time ( )

inlineprivate

Return the time from the RAM locations.

timevalue Rtc146818::next_alarm ( timevalue  seconds )

inlineprivate

Returns the time of the next alarm in seconds.

unsigned char Rtc146818::ram ( unsigned char  index )

inlineprivate

Read values from RAM and convert time information from BCD and 12h format.

bool Rtc146818::receive ( MessageIOIn &  msg )

inline

bool Rtc146818::receive ( MessageIOOut &  msg )

inline

bool Rtc146818::receive ( MessageIrqNotify &  msg )

inline

bool Rtc146818::receive ( MessageTimeout &  msg )

inline

void Rtc146818::reset ( MessageTime &  time )

inline

void Rtc146818::set_irqflags ( unsigned char  value )

inlineprivate

Set the IRQ flags and raise an IRQ if needed.

unsigned Rtc146818::update_cycle ( timevalue  now )

inlineprivate

Performs an update cycle and updates the time in the RAM.

void Rtc146818::update_ram ( timevalue  seconds )

inlineprivate

Update the time with the given seconds.

void Rtc146818::update_timer ( timevalue  last_seconds, timevalue  now  )

inlineprivate

Reprogram the next timer.

Friends And Related Function Documentation

friend class RtcTest

friend

Member Data Documentation

DBus<MessageIrqLines>& Rtc146818::_bus_irqlines

private

DBus<MessageTimer>& Rtc146818::_bus_timer

private

Clock* Rtc146818::_clock

private

unsigned char Rtc146818::_index

private

unsigned short Rtc146818::_iobase

private

unsigned Rtc146818::_irq

private

timevalue Rtc146818::_last

private

timevalue Rtc146818::_offset

private

unsigned char Rtc146818::_ram[128]

private

unsigned Rtc146818::_timer

private

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

• vancouver/model/rtc146818.cc