The serial port is an internal class which is attached to and then serviced by a specified SerialService thread. More...

#include <serial.h>

Inheritance diagram for SerialPort:

[legend]

Collaboration diagram for SerialPort:

[legend]

Public Types
enum	Error { errSuccess = 0, errOpenNoTty, errOpenFailed, errSpeedInvalid, errFlowInvalid, errParityInvalid, errCharsizeInvalid, errStopbitsInvalid, errOptionInvalid, errResourceFailure, errOutput, errInput, errTimeout, errExtended }

typedef enum Error	Error

enum	Flow { flowNone, flowSoft, flowHard, flowBoth }

typedef enum Flow	Flow

enum	Parity { parityNone, parityOdd, parityEven }

typedef enum Parity	Parity

enum	Pending { pendingInput, pendingOutput, pendingError }

typedef enum Pending	Pending

Public Member Functions
void	setTimer (timeout_t timeout=0)
	Derived setTimer to notify the service thread pool of changes in expected timeout. More...

void	incTimer (timeout_t timeout)
	Derived incTimer to notify the service thread pool of a change in expected timeout. More...

Error	setSpeed (unsigned long speed)
	Set serial port speed for both input and output. More...

Error	setCharBits (int bits)
	Set character size. More...

Error	setParity (Parity parity)
	Set parity mode. More...

Error	setStopBits (int bits)
	Set number of stop bits. More...

Error	setFlowControl (Flow flow)
	Set flow control. More...

void	toggleDTR (timeout_t millisec)
	Set the DTR mode off momentarily. More...

void	sendBreak (void)
	Send the "break" signal. More...

Error	getErrorNumber (void)
	Often used by a "catch" to fetch the last error of a thrown serial. More...

char *	getErrorString (void)
	Often used by a "catch" to fetch the user set error string of a thrown serial. More...

int	getBufferSize (void)
	Get the "buffer" size for buffered operations. More...

virtual bool	isPending (Pending pend, timeout_t timeout=TIMEOUT_INF)
	Get the status of pending operations. More...

void	decTimer (timeout_t timeout)
	Adjust a timeout based on the current time reference value either from object creation or the last setTimer(). More...

void	sleepTimer (void)
	Sleep until the current timer expires. More...

void	endTimer (void)
	This is used to "disable" the service thread from expiring the timer object. More...

timeout_t	getTimer (void) const
	This is used by service threads to determine how much time remains before the timer expires based on a timeout specified in setTimer() or incTimer(). More...

timeout_t	getElapsed (void) const
	This is used to determine how much time has elapsed since a timer port setTimer benchmark time was initially set. More...

Protected Member Functions
	SerialPort (SerialService svc, const char name)
	Construct a tty serial port for a named serial device. More...

virtual	~SerialPort ()
	Disconnect the Serial Port from the service pool thread and shutdown the port. More...

void	setDetectPending (bool)
	Used to indicate if the service thread should monitor pending data for us. More...

bool	getDetectPending (void) const
	Get the current state of the DetectPending flag. More...

void	setDetectOutput (bool)
	Used to indicate if output ready monitoring should be performed by the service thread. More...

bool	getDetectOutput (void) const
	Get the current state of the DetectOutput flag. More...

virtual void	expired (void)
	Called by the service thread when the objects timer has expired. More...

virtual void	pending (void)
	Called by the service thread when input data is pending for this tty port. More...

virtual void	disconnect (void)
	Called by the service thread when an exception has occured such as a hangup. More...

int	output (void *buf, int len)
	Transmit "send" data to the serial port. More...

virtual void	output (void)
	Perform when output is available for sending data. More...

int	input (void *buf, int len)
	Receive "input" for pending data from the serial port. More...

void	open (const char *fname)
	Opens the serial device. More...

void	close (void)
	Closes the serial device. More...

virtual int	aRead (char *Data, const int Length)
	Reads from serial device. More...

virtual int	aWrite (const char *Data, const int Length)
	Writes to serial device. More...

Error	error (Error error, char *errstr=NULL)
	This service is used to throw all serial errors which usually occur during the serial constructor. More...

void	error (char *err)
	This service is used to thow application defined serial errors where the application specific error code is a string. More...

void	setError (bool enable)
	This method is used to turn the error handler on or off for "throwing" execptions by manipulating the thrown flag. More...

int	setPacketInput (int size, unsigned char btimer=0)
	Set packet read mode and "size" of packet read buffer. More...

int	setLineInput (char newline=13, char nl1=0)
	Set "line buffering" read mode and specifies the newline character to be used in seperating line records. More...

void	restore (void)
	Restore serial device to the original settings at time of open. More...

void	flushInput (void)
	Used to flush the input waiting queue. More...

void	flushOutput (void)
	Used to flush any pending output data. More...

void	waitOutput (void)
	Used to wait until all output has been sent. More...

void	endSerial (void)
	Used as the default destructor for ending serial I/O services. More...

void	initConfig (void)
	Used to initialize a newly opened serial file handle. More...

Protected Attributes
HANDLE	dev

int	bufsize

Private Attributes
SerialPort *	next

SerialPort *	prev

SerialService *	service

bool	detect_pending

bool	detect_output

bool	detect_disconnect

Friends
class	SerialService

Detailed Description

The serial port is an internal class which is attached to and then serviced by a specified SerialService thread.

Derived versions of this class offer specific functionality such as serial integration protocols.

The TTYPort and TTYService classes are used to form thread-pool serviced serial I/O protocol sets. These can be used when one has a large number of serial devices to manage, and a single (or limited number of) thread(s) can then be used to service the tty port objects present. Each tty port supports a timer control and several virtual methods that the service thread can call when events occur. This model provides for "callback" event management, whereby the service thread performs a "callback" into the port object when events occur. Specific events supported include the expiration of a TTYPort timer, pending input data waiting to be read, and "sighup" connection breaks.

Author: David Sugar dyfet.nosp@m.@ost.nosp@m.el.co.nosp@m.m base class for thread pool serviced serial I/O.

Definition at line 631 of file serial.h.

Member Typedef Documentation

typedef enum Error Serial::Error

inherited

Definition at line 117 of file serial.h.

typedef enum Flow Serial::Flow

inherited

Definition at line 125 of file serial.h.

typedef enum Parity Serial::Parity

inherited

Definition at line 132 of file serial.h.

typedef enum Pending Serial::Pending

inherited

Definition at line 139 of file serial.h.

Member Enumeration Documentation

enum Serial::Error

inherited

Enumerator
errSuccess
errOpenNoTty
errOpenFailed
errSpeedInvalid
errFlowInvalid
errParityInvalid
errCharsizeInvalid
errStopbitsInvalid
errOptionInvalid
errResourceFailure
errOutput
errInput
errTimeout
errExtended

Definition at line 101 of file serial.h.

enum Serial::Flow

inherited

Enumerator
flowNone
flowSoft
flowHard
flowBoth

Definition at line 119 of file serial.h.

enum Serial::Parity

inherited

Enumerator
parityNone
parityOdd
parityEven

Definition at line 127 of file serial.h.

enum Serial::Pending

inherited

Enumerator
pendingInput
pendingOutput
pendingError

Definition at line 134 of file serial.h.

Constructor & Destructor Documentation

SerialPort::SerialPort	(	SerialService *	svc,
		const char *	name
	)

protected

Construct a tty serial port for a named serial device.

Parameters

svc	pool thread object.
name	of tty port.

virtual SerialPort::~SerialPort ( )

protectedvirtual

Disconnect the Serial Port from the service pool thread and shutdown the port.

Member Function Documentation

virtual int Serial::aRead	(	char *	Data,
		const int	Length
	)

protectedvirtualinherited

Reads from serial device.

Parameters

Data	Point to character buffer to receive data. Buffers MUST be at least Length + 1 bytes in size.
Length	Number of bytes to read.

virtual int Serial::aWrite	(	const char *	Data,
		const int	Length
	)

protectedvirtualinherited

Writes to serial device.

Parameters

Data	Point to character buffer containing data to write. Buffers MUST
Length	Number of bytes to write.

void Serial::close ( void )

protectedinherited

Closes the serial device.

void TimerPort::decTimer ( timeout_t timeout )

inherited

Adjust a timeout based on the current time reference value either from object creation or the last setTimer().

This reference can be used to time synchronize realtime data over specified intervals and force expiration when a new frame should be released in a synchronized manner.

Parameters

timeout delay in milliseconds from reference.

virtual void SerialPort::disconnect ( void )

protectedvirtual

Called by the service thread when an exception has occured such as a hangup.

void Serial::endSerial ( void )

protectedinherited

Used as the default destructor for ending serial I/O services.

It will restore the port to it's original state.

void TimerPort::endTimer ( void )

inherited

This is used to "disable" the service thread from expiring the timer object.

It does not effect the reference time from either creation or a setTimer().

Error Serial::error	(	Error	error,
		char *	errstr = `NULL`
	)

protectedinherited

This service is used to throw all serial errors which usually occur during the serial constructor.

Parameters

error	defined serial error id.
errstr	string or message to optionally pass.

void Serial::error ( char * err )

inlineprotectedinherited

This service is used to thow application defined serial errors where the application specific error code is a string.

Parameters

err	string or message to pass.

Definition at line 209 of file serial.h.

virtual void SerialPort::expired ( void )

protectedvirtual

Called by the service thread when the objects timer has expired.

void Serial::flushInput ( void )

protectedinherited

Used to flush the input waiting queue.

void Serial::flushOutput ( void )

protectedinherited

Used to flush any pending output data.

int Serial::getBufferSize ( void )

inlineinherited

Get the "buffer" size for buffered operations.

This can be used when setting packet or line read modes to determine how many bytes to wait for in a given read call.

Returns: number of bytes used for buffering.

Definition at line 387 of file serial.h.

bool SerialPort::getDetectOutput ( void ) const

inlineprotected

Get the current state of the DetectOutput flag.

Definition at line 681 of file serial.h.

bool SerialPort::getDetectPending ( void ) const

inlineprotected

Get the current state of the DetectPending flag.

Definition at line 669 of file serial.h.

timeout_t TimerPort::getElapsed ( void ) const

inherited

This is used to determine how much time has elapsed since a timer port setTimer benchmark time was initially set.

This allows one to use setTimer() to set the timer to the current time and then measure elapsed time from that point forward.

return time elapsed in milliseconds, or TIMEOUT_INF if inactive.

Error Serial::getErrorNumber ( void )

inlineinherited

Often used by a "catch" to fetch the last error of a thrown serial.

Returns: error numbr of last Error.

Definition at line 368 of file serial.h.

char* Serial::getErrorString ( void )

inlineinherited

Often used by a "catch" to fetch the user set error string of a thrown serial.

Returns: string for error message.

Definition at line 377 of file serial.h.

timeout_t TimerPort::getTimer ( void ) const

inherited

This is used by service threads to determine how much time remains before the timer expires based on a timeout specified in setTimer() or incTimer().

It can also be called after setting a timeout with incTimer() to see if the current timeout has already expired and hence that the application is already delayed and should skip frame(s).

return time remaining in milliseconds, or TIMEOUT_INF if inactive.

void SerialPort::incTimer ( timeout_t timeout )

Derived incTimer to notify the service thread pool of a change in expected timeout.

This allows SerialService to reschedule all timers.

void Serial::initConfig ( void )

protectedinherited

Used to initialize a newly opened serial file handle.

You should set serial properties and DTR manually before first use.

int SerialPort::input	(	void *	buf,
		int	len
	)

inlineprotected

Receive "input" for pending data from the serial port.

This is not a public member since it's meant to support internal protocols rather than direct external access to the device.

Returns: number of bytes received.

Parameters

buf	address of buffer to input.
len	of input buffer used.

Definition at line 729 of file serial.h.

virtual bool Serial::isPending	(	Pending	pend,
		timeout_t	timeout = `TIMEOUT_INF`
	)

virtualinherited

Get the status of pending operations.

This can be used to examine if input or output is waiting, or if an error has occured on the serial device.

Returns: true if ready, false if timeout.

Parameters

pend	ready check to perform.
timeout	in milliseconds.

Reimplemented in TTYStream.

void Serial::open ( const char * fname )

protectedinherited

Opens the serial device.

Parameters

fname Pathname of device to open

int SerialPort::output	(	void *	buf,
		int	len
	)

inlineprotected

Transmit "send" data to the serial port.

This is not public since it's meant to support internal protocols rather than direct public access to the device.

Returns: number of bytes send.

Parameters

buf	address of buffer to send.
len	of bytes to send.

Definition at line 712 of file serial.h.

virtual void SerialPort::output ( void )

protectedvirtual

Perform when output is available for sending data.

virtual void SerialPort::pending ( void )

protectedvirtual

Called by the service thread when input data is pending for this tty port.

Effected by setPacketInput and by setLineInput.

void Serial::restore ( void )

protectedinherited

Restore serial device to the original settings at time of open.

void Serial::sendBreak ( void )

inherited

Send the "break" signal.

Error Serial::setCharBits ( int bits )

inherited

Set character size.

Returns: 0 on success.

Parameters

bits	character size to use (usually 7 or 8).

void SerialPort::setDetectOutput ( bool )

protected

Used to indicate if output ready monitoring should be performed by the service thread.

void SerialPort::setDetectPending ( bool )

protected

Used to indicate if the service thread should monitor pending data for us.

void Serial::setError ( bool enable )

inlineprotectedinherited

This method is used to turn the error handler on or off for "throwing" execptions by manipulating the thrown flag.

Parameters

enable true to enable handler.

Definition at line 219 of file serial.h.

Error Serial::setFlowControl ( Flow flow )

inherited

Set flow control.

Returns: 0 on success.

Parameters

flow	control mode.

int Serial::setLineInput	(	char	newline = `13`,
		char	nl1 = `0`
	)

protectedinherited

Set "line buffering" read mode and specifies the newline character to be used in seperating line records.

isPending can then be used to wait for an entire line of input.

Parameters

newline	newline character.
nl1	EOL2 control character.

Returns: size of conical input buffer.

int Serial::setPacketInput	(	int	size,
		unsigned char	btimer = `0`
	)

protectedinherited

Set packet read mode and "size" of packet read buffer.

This sets VMIN to x. VTIM is normally set to "0" so that "isPending()" can wait for an entire packet rather than just the first byte.

Returns: actual buffer size set.

Parameters

size	of packet read request.
btimer	optional inter-byte data packet timeout.

Error Serial::setParity ( Parity parity )

inherited

Set parity mode.

Returns: 0 on success.

Parameters

parity mode.

Error Serial::setSpeed ( unsigned long speed )

inherited

Set serial port speed for both input and output.

Returns: 0 on success.

Parameters

speed to select. 0 signifies modem "hang up".

Error Serial::setStopBits ( int bits )

inherited

Set number of stop bits.

Returns: 0 on success.

Parameters

bits	stop bits.

void SerialPort::setTimer ( timeout_t timeout = 0 )

Derived setTimer to notify the service thread pool of changes in expected timeout.

This allows SerialService to reschedule all timers.

Parameters

timeout in milliseconds.

void TimerPort::sleepTimer ( void )

inherited

Sleep until the current timer expires.

This is useful in time syncing realtime periodic tasks.

void Serial::toggleDTR ( timeout_t millisec )

inherited

Set the DTR mode off momentarily.

Parameters

millisec number of milliseconds.

void Serial::waitOutput ( void )

protectedinherited

Used to wait until all output has been sent.

Friends And Related Function Documentation

friend class SerialService

friend

Definition at line 643 of file serial.h.

Field Documentation

int Serial::bufsize

protectedinherited

Definition at line 162 of file serial.h.

bool SerialPort::detect_disconnect

private

Definition at line 641 of file serial.h.

bool SerialPort::detect_output

private

Definition at line 640 of file serial.h.

bool SerialPort::detect_pending

private

Definition at line 639 of file serial.h.

HANDLE Serial::dev

protectedinherited

Definition at line 160 of file serial.h.

bool Serial::linebuf

inherited

Definition at line 147 of file serial.h.

SerialPort* SerialPort::next

private

Definition at line 634 of file serial.h.

SerialPort * SerialPort::prev

private

Definition at line 634 of file serial.h.

SerialService* SerialPort::service

private

Definition at line 635 of file serial.h.

bool Serial::thrown

inherited

Definition at line 146 of file serial.h.

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

serial.h

Public Types

Public Member Functions

Protected Member Functions

Protected Attributes

Private Attributes

Friends

Detailed Description

Member Typedef Documentation

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

Friends And Related Function Documentation

Field Documentation