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lfc::posixPAL::serial Namespace Reference

posix serial communications PAL. More...

Compounds
struct	lfc::posixPAL::serial::PortSettings
	contain port settings to save/restore. More...
Typedefs
typedef int	Handle
	serial port handle type. More...
Enumerations
enum	ErrorCodes { errOk, errGeneric, errNotSupported }
Functions
int	init ()
	init PAL. More...
int	cleanup ()
	cleanup PAL. More...
int	open (Handle &handle, const char *name)
	open serial port. More...
int	close (Handle handle)
	close a serial port. More...
int	write (Handle handle, const void *buff, long count, long &writtenCount)
	write data to a serial device. More...
int	read (Handle handle, void *buff, long count, long &readCount)
	read data from a serial device. More...
int	flush (Handle handle)
	flush output buffer. More...
int	setup (Handle handle, const char *portSettings)
	set port settings (baud rate, parity, ...). More...
int	availableCount (Handle handle, long &count)
	get the number of bytes available in the input buffer. More...
int	setHardwareFlowControl (Handle handle, bool bEnable)
	enable/disable hardware flow control. More...
int	setSoftwareFlowControl (Handle handle, bool bEnable, char Xon, char Xoff)
	enable/disable software flow control. More...
int	setReadTimeouts (Handle handle, long timeout)
	set read timeouts. More...
int	setBlockingRead (Handle handle, bool bBlocking)
	enable/disable blocking read. More...
int	purgeBuffer (Handle handle, int flags)
	purge i/o buffers. More...
int	sendBreak (Handle handle)
	send a break (for 500ms). More...
int	getModemStatus (Handle handle, int &status)
	get modem status bits (DSR, DTR, RTS, CTS, DCD, RNG). More...
int	setDTR (Handle handle, bool bEnable)
	enable/disable DTR. More...
int	setRTS (Handle handle, bool bEnable)
	enable/disable RTS. More...
int	saveSettings (Handle handle, PortSettings &settings)
	save current port settings. More...
int	restoreSettings (Handle handle, const PortSettings &settings)
	restore current port settings. More...
const char *	message (int index)
	return the message coresponding to a return code. More...
Variables
const int	MAX_ERROR_CODE = 2
const char *	messagesTable [MAX_ERROR_CODE+1]
const Handle	NULL_HANDLE = -1
	a handle value designating an invalid handle. More...
const int	purgeInput = 0x0001
	purge buffer flags. More...
const int	purgeOutput = 0x0002
	purge buffer flags. More...
const int	mstatusDSR = 0x0001
	modem status flags. More...
const int	mstatusDTR = 0x0002
	modem status flags. More...
const int	mstatusRTS = 0x0004
	modem status flags. More...
const int	mstatusCTS = 0x0008
	modem status flags. More...
const int	mstatusDCD = 0x0010
	modem status flags. More...
const int	mstatusRNG = 0x0020
	modem status flags. More...

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Detailed Description

posix serial communications PAL.

Todo:

more datalied error codes

need testing

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Typedef Documentation

typedef int lfc::posixPAL::serial::Handle

serial port handle type.

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Enumeration Type Documentation

enum lfc::posixPAL::serial::ErrorCodes

Enumeration values: errOk  errGeneric  errNotSupported

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Function Documentation

int init (    )  [inline]

init PAL. Returns: error code (0 means no error)

int cleanup (    )  [inline]

cleanup PAL. Returns: error code (0 means no error)

int open (  Handle &    handle, const char *    name )  [inline]

open serial port. Parameters: handle  will contain the handle if the operation succed, no modification otherwhise name  comm device name (ex. "com1" under win32, "/dev/ttyS0" under Linux) Returns: error code (0 means no error)

int close (  Handle    handle )  [inline]

close a serial port. Parameters: handle  a valid serial port handle Returns: error code (0 means no error)

int write (  Handle    handle, const void *    buff, long    count, long &    writtenCount )  [inline]

write data to a serial device. Parameters: handle  a valid handle buff  pointer to the data to be written count  number of bytes to write written  return the actual number of bytes written Returns: error code (0 means no error)

int read (  Handle    handle, void *    buff, long    count, long &    readCount )  [inline]

read data from a serial device. Parameters: handle  a valid handle buff  pointer to the buffer that will receive the data count  number of bytes to read written  return the actual number of bytes read Returns: error code (0 means no error)

int flush (  Handle    handle )  [inline]

flush output buffer. Parameters: handle  a valid handle Returns: error code (0 means no error)

int setup (  Handle    handle, const char *    portSettings )  [inline]

set port settings (baud rate, parity, ...). Parameters: handle  a valid handle portSettings  describe port settings in the following format: <baud>, <S> where baud is serial transmition speed B is byte size (5..8) P is parity (n-none, o-odd, e-even, s-space) S is stop bits (1 or 2) Note: settings string is not case sensitive and it can't containt whitespaces Returns: error code (0 means no error)

int availableCount (  Handle    handle, long &    count )  [inline]

get the number of bytes available in the input buffer. Parameters: handle  a valid handle count  return the count of available bytes in the input buffer Returns: error code (0 means no error)

int setHardwareFlowControl (  Handle    handle, bool    bEnable )  [inline]

enable/disable hardware flow control. Parameters: handle  a valid handle bEnable  if true enable hardware flow control, else disable Returns: error code (0 means no error)

int setSoftwareFlowControl (  Handle    handle, bool    bEnable, char    Xon, char    Xoff )  [inline]

enable/disable software flow control. Parameters: handle  a valid handle bEnable  if true enable software flow control, else disable Xon  XON character Xoff  XOFF character Returns: error code (0 means no error)

int setReadTimeouts (  Handle    handle, long    timeout )  [inline]

set read timeouts. Parameters: handle  a valid handle timeout  time (in ms) to wait until a char is received Returns: error code (0 means no error)

int setBlockingRead (  Handle    handle, bool    bBlocking )  [inline]

enable/disable blocking read. Parameters: handle  a valid handle bBlocking  if true read blocks until all requested data is read, else read will return immediately with available bytes (possibly none) Returns: error code (0 means no error) Note: this function might affect read timeouts

int purgeBuffer (  Handle    handle, int    flags )  [inline]

purge i/o buffers. Parameters: handle  a valid handle flags  a combination of the following: purgeInput - clear input buffer purgeOutput - clear output buffer Returns: error code (0 means no error)

int sendBreak (  Handle    handle )  [inline]

send a break (for 500ms). Parameters: handle  a valid handle Returns: error code (0 means no error)

int getModemStatus (  Handle    handle, int &    status )  [inline]

get modem status bits (DSR, DTR, RTS, CTS, DCD, RNG). Parameters: handle  a valid handle status  will receive modem status flags mstatusCTS - clear to send mstatusDSR - data set ready mstatusRNG - ring mstatusDCD - data carrier detect Returns: error code (0 means no error) Warning: doesn't get RTS, DTR

int setDTR (  Handle    handle, bool    bEnable )  [inline]

enable/disable DTR. Parameters: handle  a valid handle bEnable  enable or disable DTR Returns: error code (0 means no error) Note: hardware flow control must be disabled to use this

int setRTS (  Handle    handle, bool    bEnable )  [inline]

enable/disable RTS. Parameters: handle  a valid handle bEnable  enable or disable RTS Returns: error code (0 means no error) Note: hardware flow control must be disabled to use this

int saveSettings (  Handle    handle, PortSettings &    settings )  [inline]

save current port settings. Parameters: handle  a valid handle settings  will store current port settings Returns: error code (0 means no error)

int restoreSettings (  Handle    handle, const PortSettings &    settings )  [inline]

restore current port settings. Parameters: handle  a valid handle settings  contain previously saved settings Returns: error code (0 means no error)

const char* message (  int    index )  [inline]

return the message coresponding to a return code. Parameters: index  message index (return code from other pal functions)

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Variable Documentation

const int lfc::posixPAL::serial::MAX_ERROR_CODE = 2

const char * lfc::posixPAL::serial::messagesTable

Initial value: { "posixPAL::serial -- No error (ok)", "posixPAL::serial -- Generic error", "posixPAL::serial -- Not supported", }

const Handle lfc::posixPAL::serial::NULL_HANDLE = -1

a handle value designating an invalid handle.

const int lfc::posixPAL::serial::purgeInput = 0x0001

purge buffer flags.

const int lfc::posixPAL::serial::purgeOutput = 0x0002

purge buffer flags.

const int lfc::posixPAL::serial::mstatusDSR = 0x0001

modem status flags.

const int lfc::posixPAL::serial::mstatusDTR = 0x0002

modem status flags.

const int lfc::posixPAL::serial::mstatusRTS = 0x0004

modem status flags.

const int lfc::posixPAL::serial::mstatusCTS = 0x0008

modem status flags.

const int lfc::posixPAL::serial::mstatusDCD = 0x0010

modem status flags.

const int lfc::posixPAL::serial::mstatusRNG = 0x0020

modem status flags.

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