denisetucker

I couldn't find the old code. That was prior to me learning to use SCC ;-)

Here's something equivalent to what you're looking for. It's in LV2009. Launch the test VI to get an idea of the functions.

WinError_class.zip (LV 2009)

Thanks, Francois. I am actually interested in the HID specifically, but I appreciate you attaching the code. Looks like no one really got it working anyway. Bummer!

QUOTE (mattdl68 @ Jan 3 2009, 11:42 PM)

I'm not either. I've not succeded in retreiving a handle the the proper DeviceInfo (and I won't have time to play with it since it's back to work tomorrow...) but here is a little tip: Use the GetLastError and FormatMessage functions from kernel32.dll. This way, you'll know what sort of problem you have.

It seems I've misled you with the datatypes I showed on my screenshot but I thought it was not important since those parameters are optional. The LPGUID typedef is a pointer to a GUID structure. Think of "struct" as a cluster in LabVIEW terminology. Hence, the datatype for GUID is something like this:

typedef struct _GUID {DWORD Data1; WORD Data2; WORD Data3; BYTE Data4[8]; } GUID; where for example this GUID: eeaf37d0-1963-47c4-aa48-72476db7cf49 would be represented by:DATA1 = EEAF37D0DATA2 = 1963DATA3 = 47C4DATA4 = {AA, 48, 72, 47, 6D, B7, CF, 49}

It is not trivial to get these to work in LabVIEW... The trick is to match the types and I personally find that frustrating sometimes!

In this case, I'm returned ERROR_INVALID_DATA. I'll leave it up to you to find a solution... But here's my Windows Error Extraction class if that can be of help. (Just input the error code from GetLastError() and Merge it to LV error cluster.

Download File:post-10515-1231128408.zip (LV 8.6)

Is this code available? The link does not work. Please?

Hi David,

Are you advocating scripting of 2 tick count vis into the error chain and then doing the subtraction to determine the measurement? Interesting idea, but then I guess I need to know a way to tack in those vi's into the error chain. And, often times, there may be some unbundling of an input cluster, in which case putting in the sequence structure ensures that you completely measure the timing of the vi.

I'm not sure I would want to do this with a LV2 global because, to have it be useful, it would need to be reentrant (otherwise you might use it in a vi running in parallel and foul up your measurements).

Thanks, Denise

I would like to automate something I end up doing fairly routinely...adding a flat sequence around some code and tick counts to determine how long a vi takes to run. After looking at Gavin's vi's (Thanks, Gavin!), I've determined how to add the sequence structure, but can anyone give me hints on tacking in the tick count and having it be _in_ the sequence frame?

Thanks, Denise

Ooops......

Works like a charm. Sweet. Many, many thanks.

Regards, Denise

Ok here is everything i have to work with the ROBO's , you will need to change some of the defaults since you have a different lead length. the first 3 things you need to do is INIT, POWER ON, HOME after that you can do whatever you need. these VI's still need some work , but, they got me through what i needed , i actually want to try to re-write them using LabVOOP. if you have any questions feel free to ask.

good luck

Dan

Here are the the protocol manuals that i have in case you or anyone else needs them ....

Hi Dan,

Popping up "ROBO init" brings up a Robo operation.ctl that is not found (in ROBO Cylinder (VISA) folder). Any chance you have that handy?

Thanks, Denise

What version of LV are you using ?? i will send you what i threw together to talk to these things....

Dan

Hi Dan,

LV 8.2. An example would be lovely.

Thanks much, Denise

THese cyclinder are really easy to deal with ONCE you figure a few things out , do you have the ROBO Cylinder Serial Communications Protocol document ?? if not i can scan it and send it to you....

Dan

Hi Dan,

Thanks for the amazingly prompt response.

Finally found the documment. (Their site is difficult to navigate.) I'm trying:

7) Position Inquiry

To poll the current position of a system addressed as #0 that has been homed to

the motor end and has a 12mm lead, send the following string:

Chr$(02) + 0R40000740008F + Chr$(03)

I'm sending this using the Basic Serial Write and Read at

38400,8,N,1, FlowControl=None, and a 1 sec delay before read. I've tried FlowControl=RTS/CTS. I've tried \n and \r\n.

Any suggestions?

Sounds like you might have found the command list for the robocylinder. Any chance you've still got your hands on it? I too am trying to develop a LV driver for it. Any hints?

Thanks, Denise