bci2000.org BBS

Hello All,

I am trying to set up BCI2000 and BioSemi Actiview Two hardware. I new to this system.
Unfortunately I am unable to visualise even raw signal.
Following are the things I confirmed.
Biosemi drivers are appropriately installed and hardware works with actiview 2 software on the same machine.

Then I un-installed Labview runtime engine 8.2.
I also ensured that Labview_DLL.dll is in /prog folder.
powered up Biosemi hardware.
Then launched following modules using BCI200 Launcher.
-Biosemi2.exe (Signal Source)
-DummySignalProcessing.exe (Signal Processing)
-Feedbackdemo.exe (Application)

Then Operator module was launched. Then I pressed setconfig to work with default parameters. When I pressed "start".
I see message below config button "waiting...". And I couldn't see raw signal too.

Is there something wrong in the procedure, I am following ??

Can anybody please help me ?

Thanks in advance,
regards,
Sudhir

Hi,

I added some error reporting to the Biosemi source module. That might help you in determining what's going on.

Get the latest source code from SVN, and recompile the Biosemi module.

Regards,
Juergen

Hello Juergen,

Thank you very much for your prompt reply.

As per your suggestion I compiled latest BioSemi module and did same procedure.
Upon launching, it gave me following error.

"2011-10-21T12:03:28 - Biosemi2ADC::Preflight: Could not connect to device."

However, as I can to connect to the hardware via Actiview software on same machine. I checked "Labview_DLL.dll" in both folders Actiview and BCI2000/prog/ . This file is of different size (42KB and 48KB) respectively.

When I used "Labview_DLL.dll (42KB)" provided by actiview in biosemi2.exe module. Module is able to connect to the hardware and now generating next error.

2011-10-21T12:10:00 - Biosemi2ADC::Preflight: No cord or power.

(Even though battery is charged around 60-70% )

My operating system is Windows 7(32 bit.)

Could you please guide me for further debugging of error/ problem ?
Can I conclude that for my system (win 7) "Labview_DLL.dll (42KB)" is right choice ?

Thanks in advance,
kind regards,
Sudhir

Hello Sudhir,

the "No cord or power" error message is shown when a connection is established but the response from the amplifier does not match what is expected by the module.

Could it be that you own a new revision of the Biosemi amplifier? The BCI2000 Biosemi2 source module supports the Biosemi Mark 2. If yours is a newer revision, we might see how to adapt the source module to that.

Regards,
Juergen

Hello Juergen,

Thanks again for prompt reply.
BioSemi Amplifier we are using in our lab is "MK2".

Would you please tell me, if you have any suggestions that I shall try out ?

Kind regards,
Sudhir

Hi,

The issue with the different drivers/DLLs is a nuisance. I am glad that you found the right DLL.

No cord or power is usually shown when the device is either not turned on or not connected. I would unplug the USB, then plug it back in and turn it on (you should hear Windows' sound recognizing the device, and the MK2 in the Device Manager). Then, it really should work.

We've just been using the MK2 with BCI2000, and aside from the driver nonsense, there was no issue.

Gerv

Hallo all,
Thanks for all your support.
Apparently my problem got solved.
---
I replaced "LabView_DLL.dll " in BCI2000/prog folder by one found in latest drivers available on biosemi website(http://www.biosemi.com/download/USB%20d ... 032bit.zip). Now this dll file is of size (47KB).
This is really strange.
Is there any way or procedure to decide which "LabView_DLL.dll" to use ?
---
Now I can see Source signal window.
thanks again.
regards,
Sudhir

Is there any way or procedure to decide which "LabView_DLL.dll" to use ?

I would try, in order:
1) the LabView_DLL that comes with BCI2000
2) the LabView_DLL that came with the amplifier
3) the latest LabView_DLL from the BioSemi website

Regards,
Juergen