Eclypse z7 fpga peak finding

[M. Hamza Öncüer]

Hi, is it possible to return only the maximum value from an ADC frame? I want to identify the maximum value within the FPGA and then send it to the PC. Can this be done using the WaveForms SDK?"

[attila]

Hi @Hamza Oncuer

See the "sample mode" option or called FDwfAnalogInChannelFilterSet for custom app/script.

[M. Hamza Öncüer]

Thank you very much. Is it possible to take x value of the maximum as well ? 

[attila]

Hi @Hamza Oncuer

You can use a script like this:

if(Index > Maximum) return;
var data = Scope.Channel1.data;
var c = data.length;
var dmax = [];
for(var i = 0; i < c; i+=2){
    dmax.push(max(data[i], data[i+1]));
}
FileWrite("~/Desktop/scope/acq"+Index+".txt", dmax);
Index++;

 

[M. Hamza Öncüer]

Thank you but if I understood correctly the example you give takes the whole frame from the board then find the maximum I need to find the maximum within the Z7 then send it to pc, is it possible ?

[attila]

Hi @Hamza Oncuer

It is possible with custom project, using EclypseZ7 as development board, but not with WaveForms.

I don't think it should bother you that only half of the samples are actually used. WF provides min/max pairs but you can capture up to 256Mi samples or 'unlimited' at lower rate (<20Msps) using streaming/recording. The WF app limits the captures to 200M samples / channel.

[M. Hamza Öncüer]

Thank you very much but I am using Qt/Python and I haven't achieved these high speeds. I believe the problem caused by the python. Can I modify the waveforms api's fpga codes so I can add a peak finding option to waveform api's data acquisition function ? 

Edited November 20, 2023 by Hamza Oncuer
Grammer correction

[attila]

Hi @Hamza Oncuer

No.

[M. Hamza Öncüer]

Than you very much, do you planning to add a built in peak finder functionality to waveforms api ?  

[attila]

I think the current min/max (peak) sampling is sufficient.

[M. Hamza Öncüer]

Hi, I want to use acqmodeScanScreen mode but I did not understand how it works exactly, if I set the buffer to lets say 500 may I do data acquisition continuously without losing data at lets say 10MHZ sampling rate and does reducing buffer size means I can use higher sampling rates for streaming ?

[M. Hamza Öncüer]

I mean can it do continuous lossless data acquisitions if I select scan screen and 10MHz sampling rate and 128Mi buffer size at z7 ? 

[attila]