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Discussion of precise time and frequency measurement

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USB protocol for digital logic events, measurement

GM
George McCollister
Wed, Apr 5, 2017 11:47 PM

Can anyone recommend a self describing, device/vendor independent USB
protocol standard for transferring digital logic events timestamped
relative to 1pps as well as voltage and current measurements and
digital output controls (latched or pulse)? So far SCPI over USBTMC
seems to be the closest thing I can find though it certainly isn't a
perfect fit. I'm trying not to invent something new (though it's
tempting). I'd like to hook it into the Linux IIO subsystem though
digital logic events aren't supported.

Thanks,
George

Can anyone recommend a self describing, device/vendor independent USB protocol standard for transferring digital logic events timestamped relative to 1pps as well as voltage and current measurements and digital output controls (latched or pulse)? So far SCPI over USBTMC seems to be the closest thing I can find though it certainly isn't a perfect fit. I'm trying not to invent something new (though it's tempting). I'd like to hook it into the Linux IIO subsystem though digital logic events aren't supported. Thanks, George
HB
Hugh Blemings
Thu, Apr 6, 2017 12:47 AM

Hi George,

On 6/4/17 09:47, George McCollister wrote:

Can anyone recommend a self describing, device/vendor independent USB
protocol standard for transferring digital logic events timestamped
relative to 1pps as well as voltage and current measurements and
digital output controls (latched or pulse)? So far SCPI over USBTMC
seems to be the closest thing I can find though it certainly isn't a
perfect fit. I'm trying not to invent something new (though it's
tempting). I'd like to hook it into the Linux IIO subsystem though
digital logic events aren't supported.

Apologies if you're already familiar with it - but perhaps something in
the sigrok project ?  https://sigrok.org/

Cheers,
Hugh

Hi George, On 6/4/17 09:47, George McCollister wrote: > Can anyone recommend a self describing, device/vendor independent USB > protocol standard for transferring digital logic events timestamped > relative to 1pps as well as voltage and current measurements and > digital output controls (latched or pulse)? So far SCPI over USBTMC > seems to be the closest thing I can find though it certainly isn't a > perfect fit. I'm trying not to invent something new (though it's > tempting). I'd like to hook it into the Linux IIO subsystem though > digital logic events aren't supported. Apologies if you're already familiar with it - but perhaps something in the sigrok project ? https://sigrok.org/ Cheers, Hugh