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function for thermometric code from digital bus

NewScreenName

Hi all,


I have found this code to convert a bus into its decimal representation, which is quite useful: RE: Convert Digital Bus to an Integer value - Calculator Viva 
However it misses the option to take the bus as a thermometric code,   if you had the bandwidth, would it be possible to update the script accordingly?

What could also be useful would be (with lower priority than the previous thermometric feature) to have a function which re-converts this digital decimal output into an analog voltage (maybe with a scaling factor). This would allow some useful data processing (e.g. and ADC input voltage minus its digital output code).

In case you had the bandwidth to update it it would be greatly appreciated.

BR

Parents

  • You can easily convert a number to the nearest thermo value, with e.g.
    floor(log( <number> )/log(2))+1

    This just looks at the highest bit and would thus also work for one-hot encoding. Other encodings of the bus value, e.g. gray code, could be handled similarly.
    If you, however, want error handling, e.g. doing some majority decision, or just check if all bits of the thermo sequence are set with e.g. !(<number> & (<number> + 1)), it will get a bit more complicated. But for this the question is not specific enough.


    For the second, to convert a digital waveform to an analog, you can use the Measurements > Digital To Analog in the ViVA menu, the corresponding skill function is awvDigital2Analog.

    Regards,

  • in reply to NewScreenName

    By the way, I didn't see the original post (there's a bug in the forums at the moment where some notifications are not being sent), but I think it's not trivial to adapt the code you reference to handle thermometer encoded data (particularly with the points that  makes about error handling).

    Andrew

  • in reply to Andrew Beckett


    It might be an option to apply a separate bus conversion module e.g. in veriloga, which takes a thermo-coded bus as input and outputs the value as binary-coded bus. This can than be displayed with the existing functionality.
    There is an example for the opposite conversion on edaboard (look for verilog-a-model-for-binary-to-thermometer-decoder, the external link is classified as spam), which might be a good starting point.

    Regards,

Reply
  • in reply to Andrew Beckett


    It might be an option to apply a separate bus conversion module e.g. in veriloga, which takes a thermo-coded bus as input and outputs the value as binary-coded bus. This can than be displayed with the existing functionality.
    There is an example for the opposite conversion on edaboard (look for verilog-a-model-for-binary-to-thermometer-decoder, the external link is classified as spam), which might be a good starting point.

    Regards,

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