Kommentare zu: W2000A communication protocol / windows- and LabVIEW library

Von: Jochen

Jochen — Sun, 04 Oct 2009 16:36:31 +0000

Hi,
that’s a good question. It’s been a while since I worked on this piece of code. If I remember correctly the first two bytes are specific to the HID-protocol (not the W2000A-protocol). Thus only counting the bytes relevant to the Welec protocol I also have 66 bytes.

Jochen

Von: PaceyIV

PaceyIV — Thu, 01 Oct 2009 22:40:53 +0000

Hi,
I’m trying to do a library for GNU\Linux using libusb. Now, I’m studing your code, and I’ve got a questions.

W2000A_REPORTSIZE is the packet size? Why 66? I’ve retrieved 64 with the libusb from the USB device, same as reported here https://sourceforge.net/apps/trac/welecw2000a/wiki/USB-Protocol
I’ve made some tests with the command to run/stop the oscilloscope. If I send a buffer of 66 byte doesn’t work, but if I use 64 byte it’s ok.

Von: Jochen

Jochen — Mon, 23 Mar 2009 16:26:57 +0000

Hi,
I’ve used Visual C++ 2008 Express Edition. That’s the latest one available for free from MS (http://www.microsoft.com/Express/).

Jochen

Von: bruno allain

bruno allain — Mon, 23 Mar 2009 11:20:52 +0000

The demo file w2000a_test.vi works well. I modified it to get two channels and files. I tried to import in Dev C++ the source code but it failed! I tried also to open it with Visual C++ 2005 Express Edition but it failed.
Which program I can used?

Bruno

Von: Jochen

Jochen — Sun, 22 Mar 2009 13:37:51 +0000

Hi,
the Demo-VI included in the LV-Library should demonstrate how to download the current measurement. As the Welec PC-Application it stops the scope and captures the curve currently displayed. Did you test this sample-VI? Do you get any error code?

Jochen

Von: bruno allain

bruno allain — Sat, 21 Mar 2009 14:26:01 +0000

Hi,

The DLL works with the W2014A. I cannot import data stored in the MEMORY of the DSO have yoy an idea how to do this?

Thanks

Von: bruno allain

bruno allain — Fri, 20 Mar 2009 15:06:37 +0000

Hi,

Many thanks for your answer.

Do you think that this DLL works with the DSO W2014A?

Bruno

Von: Jochen

Jochen — Tue, 17 Mar 2009 10:31:27 +0000

Hi,
the msvcrt90.dll should be placed in the Windows SYSTEM32 folder. Where to put the w2000a.dll depends on your application. In Labview it should be in the same directory as the VI.

Jochen

Von: bruno allain

bruno allain — Mon, 16 Mar 2009 22:18:58 +0000

Hi,

How to install the folder w2000a.dll??

Thanks

Bruno

Von: bruno allain

bruno allain — Mon, 16 Mar 2009 22:12:56 +0000

Dear Sir,

I would like know in whci folder I must install w2000a.dll and msvcr90.dll

Bruno