Some special-channels of the config IOType pass IP address (and others) in a double. This function is used to convert a string in
normal decimal-dot or hex-dot notation into a double.
Declaration:
LJ_ERROR _stdcall StringToDoubleAddress ( const char *pString,
double *pNumber,
long HexDot)
Parameter Description:
Returns: LabJack errorcodes or 0 for no error.
Inputs:
pString
– A pointer to the string representation.
HexDot
– If not equal to zero, the passed string should be in hex-dot notation rather than decimal-dot.
Outputs:
pNumber
– A pointer to the double precision representation.
4.2.12 - StringToConstant()
Converts the given string to the appropriate constant number. Used internally by the S functions, but could be useful to the end user
when using the GetFirst/Next functions without the ability to include the header file. In this case a comparison could be done on the
return values such as:
if (IOType == StringToConstant("LJ_ioANALOG_INPUT"))
This function returns
LJ_INVALID_CONSTANT
if the string is not recognized.
Declaration:
long _stdcall StringToConstant ( const char *pString )
Parameter Description:
Returns: Constant number of the passed string.
Inputs:
pString
– A pointer to the string representation of the constant.
Outputs:
None
4.2.13 - ErrorToString()
Outputs a string describing the given error code or an empty string if not found.
Declaration:
void _stdcall ErrorToString ( LJ_ERROR ErrorCode,
char *pString)
Parameter Description:
Returns: LabJack errorcodes or 0 for no error.
Inputs:
ErrorCode
– LabJack errorcode.
pString
– Must pass a buffer for the string of at least 256 bytes.
Outputs:
*pString
– A pointer to the string representation of the errorcode.
4.2.14 - GetDriverVersion()
Returns the version number of this Windows LabJack driver.
Declaration:
double _stdcall GetDriverVersion();
Parameter Description:
Returns: Driver version.
Inputs:
None
Outputs:
None
4.2.15 - TCVoltsToTemp()
A utility function to convert thermocouple voltage readings to temperature.
Declaration:
LJ_ERROR _stdcall TCVoltsToTemp ( long TCType,
double TCVolts,
double CJTempK,
double *pTCTempK)
Parameter Description:
Returns: LabJack errorcodes or 0 for no error.
Inputs:
TCType
– A constant that specifies the thermocouple type, such as LJ_ttK.
TCVolts
– The thermocouple voltage.
CJTempK
– The temperature of the cold junction in degrees K.
Outputs:
pTCTempK
– Returns the calculated thermocouple temperature.
4.2.16 - ResetLabJack()
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