Description
|
It is often necessary for an application to send commands to a controller via UPDD. Typically a hex value will be involved. This routine converts a hex string in ASCII format to its hexadecimal equivalent. |
|
Parameters |
Hex string and length. The resultant value is stored in the supplied buffer. |
|
Returns |
0 = fail, 1 = OK. |
|
Notes |
This routine only exists in TBapi.DLL (i.e. not UPDD itself) and is supplied for convenience only. |
Visual C++ Declaration/example
BOOL
TBApiConvertHexString(char *s, int iLength);
char buf[10];
strcpy(buf, “1AF8”);
If (!TBApiConvertHexString(
buf, strlen(buf)) )
AfxMessageBox(
“Bad Hex data”);
else
TBApiSendData(m_iDeviceId, buf, strlen(buf) / 2, 50 );
Visual Basic Declaration/example
Public Declare Function
TBApiConvertHexString Lib "TBapi" Alias
“_DLL_TBApiConvertHexString@8" (ByVal ptrData As String, ByVal aLength As
Long) As Boolean
Dim result As Boolean
Dim aString As String
aString = “1AF8”
Result =
TBApiConvertHexString(aString, Len(aString))
If result = false then
MsgBox “Bad hex
data”
else
TBApiSendData(DeviceId, aString, Len(aString) \ 2, 50 ) ‘ note: integer division
End If