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Subject: Re: writing waveform out
From: "J. Frederick Bartlett ([email protected])" <[email protected]>
To: Luedeke Andreas <[email protected]>, tech-talk <[email protected]>
Cc: [email protected]
Date: Tue, 13 Jul 1999 13:46:11 CDT
> Hi all,
> I need a waveform output record with variable array length.
> A pretty common requirement I think, so I hope someone has already done
> it.
> I'm writing device/driver support for the SLS power supply controller.
> The controller can download arbitrary reference current waveforms
> which will be started at an external trigger.
> As I understand, the 'aao' record does not support modification of the
> NELM field, to tell device support how long the current array is.
> I could send the data-length through the first value of the array or
> through an extra longout record to the device support, but maybe someone
> 
> can tell me a more common way.
> Thanks in advance
> Andreas
> 
> --
> mailto:[email protected]
> 
> 

Andreas,

  Another possibility, if you are writing to a device which is
attached to the VME bus, is the generic VME record that Mark Rivers at
U. Chicago has provided. Fields in the record select the direction
(read or write), the addressing mode (A16, A24, A32), the data mode
(D8, D16, D32), and the size of the transfer. Look at the description
at the URL:

		http://cars1.uchicago.edu:80/software/recVME.html

						Fritz Bartlett


References:
writing waveform out Luedeke Andreas

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