NAME
ost::Serial -
The Serial class is used as the base for all serial I/O services under
APE.
SYNOPSIS
#include <serial.h>
Inherited by ost::SerialPort, and ost::TTYStream.
Public Types
enum Error { errSuccess = 0, errOpenNoTty, errOpenFailed,
errSpeedInvalid, errFlowInvalid, errParityInvalid,
errCharsizeInvalid, errStopbitsInvalid, errOptionInvalid,
errResourceFailure, errOutput, errInput, errTimeout, errExtended }
enum Flow { flowNone, flowSoft, flowHard, flowBoth }
enum Parity { parityNone, parityOdd, parityEven }
enum Pending { pendingInput, pendingOutput, pendingError }
typedef enum Error Error
typedef enum Flow Flow
typedef enum Parity Parity
typedef enum Pending Pending
Public Member Functions
virtual ~Serial ()
The serial base class may be thrown as a result on an error, and
the catcher may then choose to destory the object.
Serial & operator= (const Serial &from)
Serial ports may also be duplecated by the assignment operator.
Error setSpeed (unsigned long speed)
Set serial port speed for both input and output.
Error setCharBits (int bits)
Set character size.
Error setParity (Parity parity)
Set parity mode.
Error setStopBits (int bits)
Set number of stop bits.
Error setFlowControl (Flow flow)
Set flow control.
void toggleDTR (timeout_t millisec)
Set the DTR mode off momentarily.
void sendBreak (void)
Send the break signal.
Error getErrorNumber (void)
Often used by a catch to fetch the last error of a thrown serial.
char * getErrorString (void)
Often used by a catch to fetch the user set error string of a
thrown serial.
int getBufferSize (void)
Get the buffer size for buffered operations.
virtual bool isPending (Pending pend, timeout_t timeout=TIMEOUT_INF)
Get the status of pending operations.
Protected Member Functions
void open (const char *fname)
Opens the serial device.
void close (void)
Closes the serial device.
virtual int aRead (char *Data, const int Length)
Reads from serial device.
virtual int aWrite (const char *Data, const int Length)
Writes to serial device.
Error error (Error error, char *errstr=NULL)
This service is used to throw all serial errors which usually occur
during the serial constructor.
void error (char *err)
This service is used to thow application defined serial errors
where the application specific error code is a string.
void setError (bool enable)
This method is used to turn the error handler on or off for
throwing execptions by manipulating the thrown flag.
int setPacketInput (int size, unsigned char btimer=0)
Set packet read mode and size of packet read buffer.
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.
void restore (void)
Restore serial device to the original settings at time of open.
void flushInput (void)
Used to flush the input waiting queue.
void flushOutput (void)
Used to flush any pending output data.
void waitOutput (void)
Used to wait until all output has been sent.
void endSerial (void)
Used as the default destructor for ending serial I/O services.
void initConfig (void)
Used to initialize a newly opened serial file handle.
Serial ()
This allows later ttystream class to open and close a serial
device.
Serial (const char *name)
A serial object may be constructed from a named file on the file
system.
Protected Attributes
HANDLE dev
int bufsize
Detailed Description
The Serial class is used as the base for all serial I/O services under
APE.
A serial is a system serial port that is used either for line or packet
based data input. Serial ports may also be ’streamable’ in a derived
form.
Common C++ serial I/O classes are used to manage serial devices and
implement serial device protocols. From the point of view of Common
C++, serial devices are supported by the underlying Posix specified
’termios’ call interface.
The serial I/O base class is used to hold a descriptor to a serial
device and to provide an exception handling interface for all serial
I/O classes. The base class is also used to specify serial I/O
properties such as communication speed, flow control, data size, and
parity. The ’Serial’ base class is not itself directly used in
application development, however.
Common C++ Serial I/O is itself divided into two conceptual modes;
frame oriented and line oriented I/O. Both frame and line oriented I/O
makes use of the ability of the underlying tty driver to buffer data
and return ’ready’ status from when select either a specified number of
bytes or newline record has been reached by manipulating termios c_cc
fields appropriately. This provides some advantage in that a given
thread servicing a serial port can block and wait rather than have to
continually poll or read each and every byte as soon as it appears at
the serial port.
Author:
David Sugar <dyfet@ostel.com> base class for all serial I/O
services.
Member Typedef Documentation
typedef enum Error ost::Serial::Error
typedef enum Flow ost::Serial::Flow
typedef enum Parity ost::Serial::Parity
typedef enum Pending ost::Serial::Pending
Member Enumeration Documentation
enum ost::Serial::Error
Enumerator:
errSuccess
errOpenNoTty
errOpenFailed
errSpeedInvalid
errFlowInvalid
errParityInvalid
errCharsizeInvalid
errStopbitsInvalid
errOptionInvalid
errResourceFailure
errOutput
errInput
errTimeout
errExtended
enum ost::Serial::Flow
Enumerator:
flowNone
flowSoft
flowHard
flowBoth
enum ost::Serial::Parity
Enumerator:
parityNone
parityOdd
parityEven
enum ost::Serial::Pending
Enumerator:
pendingInput
pendingOutput
pendingError
Constructor & Destructor Documentation
ost::Serial::Serial () [inline, protected]
This allows later ttystream class to open and close a serial device.
ost::Serial::Serial (const char * name) [protected]
A serial object may be constructed from a named file on the file
system. This named device must be ’isatty()’.
Parameters:
name of file.
virtual ost::Serial::~Serial () [virtual]
The serial base class may be ’thrown’ as a result on an error, and the
’catcher’ may then choose to destory the object. By assuring the socket
base class is a virtual destructor, we can assure the full object is
properly terminated.
Member Function Documentation
virtual int ost::Serial::aRead (char * Data, const int Length) [protected,
virtual]
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 ost::Serial::aWrite (const char * Data, const int Length)
[protected, virtual]
Writes to serial device. Parameters:
Data Point to character buffer containing data to write. Buffers
MUST
Length Number of bytes to write.
void ost::Serial::close (void) [protected]
Closes the serial device.
Reimplemented in ost::ttystream.
void ost::Serial::endSerial (void) [protected]
Used as the default destructor for ending serial I/O services. It will
restore the port to it’s original state.
void ost::Serial::error (char * err) [inline, protected]
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.
References error().
Referenced by error().
Error ost::Serial::error (Error error, char * errstr = NULL) [protected]
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 ost::Serial::flushInput (void) [protected]
Used to flush the input waiting queue.
void ost::Serial::flushOutput (void) [protected]
Used to flush any pending output data.
int ost::Serial::getBufferSize (void) [inline]
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.
Error ost::Serial::getErrorNumber (void) [inline]
Often used by a ’catch’ to fetch the last error of a thrown serial.
Returns:
error numbr of last Error.
char* ost::Serial::getErrorString (void) [inline]
Often used by a ’catch’ to fetch the user set error string of a thrown
serial. Returns:
string for error message.
void ost::Serial::initConfig (void) [protected]
Used to initialize a newly opened serial file handle. You should set
serial properties and DTR manually before first use.
virtual bool ost::Serial::isPending (Pending pend, timeout_t timeout =
TIMEOUT_INF) [virtual]
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 ost::TTYStream.
void ost::Serial::open (const char * fname) [protected]
Opens the serial device. Parameters:
fname Pathname of device to open
Reimplemented in ost::ttystream.
Serial& ost::Serial::operator= (const Serial & from)
Serial ports may also be duplecated by the assignment operator.
void ost::Serial::restore (void) [protected]
Restore serial device to the original settings at time of open.
void ost::Serial::sendBreak (void)
Send the ’break’ signal.
Error ost::Serial::setCharBits (int bits)
Set character size. Returns:
0 on success.
Parameters:
bits character size to use (usually 7 or 8).
void ost::Serial::setError (bool enable) [inline, protected]
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.
Error ost::Serial::setFlowControl (Flow flow)
Set flow control. Returns:
0 on success.
Parameters:
flow control mode.
int ost::Serial::setLineInput (char newline = 13, char nl1 = 0) [protected]
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 ost::Serial::setPacketInput (int size, unsigned char btimer = 0)
[protected]
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 ost::Serial::setParity (Parity parity)
Set parity mode. Returns:
0 on success.
Parameters:
parity mode.
Error ost::Serial::setSpeed (unsigned long speed)
Set serial port speed for both input and output. Returns:
0 on success.
Parameters:
speed to select. 0 signifies modem ’hang up’.
Error ost::Serial::setStopBits (int bits)
Set number of stop bits. Returns:
0 on success.
Parameters:
bits stop bits.
void ost::Serial::toggleDTR (timeout_t millisec)
Set the DTR mode off momentarily. Parameters:
millisec number of milliseconds.
void ost::Serial::waitOutput (void) [protected]
Used to wait until all output has been sent.
Member Data Documentation
int ost::Serial::bufsize [protected]
HANDLE ost::Serial::dev [protected]
bool ost::Serial::linebuf
bool ost::Serial::thrown
Author
Generated automatically by Doxygen for GNU CommonC++ from the source
code.