cCANSerial_ESD Class Reference

Low-level communication class to access a CAN port from company ESD (http://www.esd.eu/) More...

#include <canserial-esd.h>

Inheritance diagram for cCANSerial_ESD:

List of all members.

Public Member Functions
	cCANSerial_ESD (int _net, unsigned long _baudrate, double _timeout, int _id_read, int _id_write) throw (cCANSerial_ESDException*)
	cCANSerial_ESD (tDeviceHandle _ntcan_handle, double _timeout, int _id_read, int _id_write) throw (cCANSerial_ESDException*)
void	Close (void) throw (cCANSerial_ESDException*)
	Close the previously opened CAN ESD interface port.
virtual char const *	GetErrorMessage (tErrorCode dw)
virtual tErrorCode	GetErrorNumber ()
tDeviceHandle	GetHandle ()
	return the internally used NTCAN_HANDLE cast to a tDeviceHandle
bool	IsOpen (void) throw ()
	Return true if interface to CAN ESD is open.
void	Open (void) throw (cCANSerial_ESDException*)
ssize_t	Read (void *data, ssize_t size, long timeout_us, bool return_on_less_data) throw (cCANSerial_ESDException*)
void	SetTimeout (double _timeout) throw (cSerialBaseException*)
	set the timeout for next readline() calls (negative value means: no timeout, wait for ever)
int	write (char const *ptr, int len=0) throw (cCANSerial_ESDException*)
	Write data to a previously opened port.
	~cCANSerial_ESD ()
	destructor: clean up
Protected Member Functions
unsigned int	BaudrateToBaudrateCode (unsigned long baudrate) throw (cCANSerial_ESDException*)
	Translate a baudrate given as unsigned long into a baudrate code for struct termios.
Protected Attributes
unsigned long	baudrate
	the baudrate to use in bit/s
int	id_read
	the CAN ID used for reading
int	id_write
	the CAN ID used for writing
int	net
	the ESD CAN net to use
int	status
Private Member Functions
	cCANSerial_ESD (cCANSerial_ESD const &other)
	private copy constructor without implementation, since copying of cCANSerial_ESD objects makes no sense
cCANSerial_ESD &	operator= (cCANSerial_ESD const &rhs)
	private copy assignment operator without implementation, since copying of cCANSerial_ESD objects makes no sense
Private Attributes
cCANSerial_ESD_Internal *	pimpl
	ptr to private, implementation specific members (using the 'Pimpl' (pointer to implementatino) design pattern)

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Detailed Description

Low-level communication class to access a CAN port from company ESD (http://www.esd.eu/)

Since SDHLibrary-C++ release 0.0.2.0 implementation specific parts of the access to ESD CAN devices have been removed from the header file here in order to get rid of dependencies from the weird ntcan.h. Specifically the ntcan_handle of type NTCAN_HANDLE member was removed. You can still provide an existing handle for reuse on construction, but you must cast your NTCAN_HANDLE to a tDeviceHandle. You can get the internally used NTCAN_HANDLE cast to a tDeviceHandle with GetHandle().

Definition at line 114 of file canserial-esd.h.

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Constructor & Destructor Documentation

cCANSerial_ESD::cCANSerial_ESD

(

cCANSerial_ESD const &

other

)

[private]

private copy constructor without implementation, since copying of cCANSerial_ESD objects makes no sense

cCANSerial_ESD::cCANSerial_ESD	(	int	_net,
		unsigned long	_baudrate,
		double	_timeout,
		int	_id_read,
		int	_id_write
	)		throw (cCANSerial_ESDException*)

Constructor: constructs an object to communicate with an SDH via CAN bus using an ESD CAN card.

Parameters:

_net	- the ESD CAN net to use
_baudrate	- the baudrate in bit/s. Only some bitrates are valid: (1000000,800000,500000,250000,125000,100000,50000,20000,10000)
_timeout	- the timeout in seconds (0 for no timeout = wait for ever)
_id_read	- the CAN ID to use for reading (The SDH sends data on this ID)
_id_write	- the CAN ID to use for writing (The SDH receives data on this ID)

cCANSerial_ESD::cCANSerial_ESD	(	tDeviceHandle	_ntcan_handle,
		double	_timeout,
		int	_id_read,
		int	_id_write
	)		throw (cCANSerial_ESDException*)

Constructor: constructs an object to communicate with an SDH via CAN bus using an ESD CAN card by reusing an already existing handle.

Parameters:

_ntcan_handle	- the ESD CAN handle to reuse (please cast your NTCAN_HANDLE to tDeviceHandle! It is save to do that!)
_timeout	- the timeout in seconds (0 for no timeout = wait for ever)
_id_read	- the CAN ID to use for reading (The SDH sends data on this ID)
_id_write	- the CAN ID to use for writing (The SDH receives data on this ID)

cCANSerial_ESD::~cCANSerial_ESD

(

)

destructor: clean up

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Member Function Documentation

unsigned int cCANSerial_ESD::BaudrateToBaudrateCode

(

unsigned long

baudrate

)

throw (cCANSerial_ESDException*) [protected]

Translate a baudrate given as unsigned long into a baudrate code for struct termios.

void cCANSerial_ESD::Close

(

void

)

throw (cCANSerial_ESDException*) [virtual]

Close the previously opened CAN ESD interface port.

Implements cSerialBase.

virtual char const* cCANSerial_ESD::GetErrorMessage

(

tErrorCode

dw

)

[virtual]

Overloaded helper function that returns an ESD error message for ESD error code dw.

Remarks:

The string returned will be overwritten by the next call to the function

Reimplemented from cSerialBase.

virtual tErrorCode cCANSerial_ESD::GetErrorNumber

(

)

[virtual]

Overloaded helper function that returns the last ESD error number.

Reimplemented from cSerialBase.

tDeviceHandle cCANSerial_ESD::GetHandle

(

)

return the internally used NTCAN_HANDLE cast to a tDeviceHandle

bool cCANSerial_ESD::IsOpen

(

void

)

throw () [virtual]

Return true if interface to CAN ESD is open.

Implements cSerialBase.

void cCANSerial_ESD::Open

(

void

)

throw (cCANSerial_ESDException*) [virtual]

Open the device as configured by the parameters given to the constructor

Implements cSerialBase.

cCANSerial_ESD& cCANSerial_ESD::operator=

(

cCANSerial_ESD const &

rhs

)

[private]

private copy assignment operator without implementation, since copying of cCANSerial_ESD objects makes no sense

ssize_t cCANSerial_ESD::Read	(	void *	data,
		ssize_t	size,
		long	timeout_us,
		bool	return_on_less_data
	)		throw (cCANSerial_ESDException*) [virtual]

Read data from device. This function waits until max_time_us us passed or the expected number of bytes are received via serial line. if (return_on_less_data is true (default value), the number of bytes that have been received are returned and the data is stored in data If the return_on_less_data is false, data is only read from serial line, if at least size bytes are available.

Implements cSerialBase.

void cCANSerial_ESD::SetTimeout

(

double

_timeout

)

throw (cSerialBaseException*) [virtual]

set the timeout for next readline() calls (negative value means: no timeout, wait for ever)

Reimplemented from cSerialBase.

int cCANSerial_ESD::write	(	char const *	ptr,
		int	len = 0
	)		throw (cCANSerial_ESDException*) [virtual]

Write data to a previously opened port.

Write len bytes from *ptr to the CAN device

Parameters:

ptr	- pointer the byte array to send in memory
len	- number of bytes to send

Returns:

the number of bytes actually written

Implements cSerialBase.

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Member Data Documentation

unsigned long cCANSerial_ESD::baudrate [protected]

the baudrate to use in bit/s

Definition at line 123 of file canserial-esd.h.

int cCANSerial_ESD::id_read [protected]

the CAN ID used for reading

Definition at line 126 of file canserial-esd.h.

int cCANSerial_ESD::id_write [protected]

the CAN ID used for writing

Definition at line 129 of file canserial-esd.h.

int cCANSerial_ESD::net [protected]

the ESD CAN net to use

Definition at line 120 of file canserial-esd.h.

cCANSerial_ESD_Internal* cCANSerial_ESD::pimpl [private]

ptr to private, implementation specific members (using the 'Pimpl' (pointer to implementatino) design pattern)

Definition at line 141 of file canserial-esd.h.

int cCANSerial_ESD::status [protected]

Definition at line 137 of file canserial-esd.h.

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

• canserial-esd.h