writing waveform out

[Luedeke Andreas <luedeke@psi.ch>]

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

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