Can Matlab be used to read TDM (technical data management) files?

[iBiR]

I run your example code , but have problems

some code like this:

tdmfile = 't.tdms';
pfile = libpointer('int32Ptr', 0);
if calllib('nilibddc','DDC_OpenFileEx', tdmfile, 'TDMS', 1, pfile) ~= 0
    disp ('TDM-file could not be loaded!');
end

plen = libpointer('uint32Ptr', 0);
calllib('nilibddc', 'DDC_GetFileStringPropertyLength', pfile.Value, 'name', plen);    

when matlab run to last line ,returns

-6206 which means

DDC_InvalidFileHandle

.

can you  help me ?thanks!

帖子被iBiR在05-05-2008 07:18 AM时编辑过了

[StefanR]

Can you please tell which version of Matlab you are using.

[littlebird]

I have tested it under both matlab 2007a ang matlab 2008a.they all have same problem

[littlebird]

tdmfile = 't.tdms';
pfile = libpointer('int32Ptr', 0);
if calllib('nilibddc','DDC_OpenFileEx', tdmfile, 'TDMS', 1, pfile) ~= 0

when matlab run to this line ,returns

0 which means

success

    disp ('TDM-file could not be loaded!');
end

plen = libpointer('uint32Ptr', 0);
calllib('nilibddc', 'DDC_GetFileStringPropertyLength', pfile.Value, 'name', plen);    

but when matlab run to last line ,returns

-6206 which means

DDC_InvalidFileHandle

how can I fix the problem?thanks   

using matlab R2007a

[SVJ]

Hi,

I am trying to extract furtther information from a tdm file like the data type of a channel and the actual data itself. However, I get an error stating a pointer mismatch. I am using the statements:

ptype=libpointer('voidPtr',uint8(0));
calllib('nilibddc','DDC_GetDataType',pchans.Value(1),ptype);

to get info about the first of 7 channels. The function DDC_GetDataType returns an numerated data type (DDCDataType). Could someone please advise? Can anyone maybe direct me to an example for this?

Regards,
SVJ

P.S: Extensive Googling has also failed to solve the problem.

[StefanR]

Hi,

it might be that the ptype should be declared as:

ptype = libpointer('int32Ptr', 0);

[SVJ]

Hello Stefan

Many Thanks. I have tried that too. Unfortunately that does not work. Also, I did not mention it previously but I am using R14 SP3.

Regards,

[CMal]

For anyone who is interested, this discussion has been continued here.

Chris M