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revathi

xadc_zynq

Question

Hi everyone,

Am doing research in Signal processing. My aim is to obtain the samples from xadc and it should be applied to my signal processing algorithm. Am working in Zynq 702 board. Still n ow i have applied the external analog signal to the dedicated pin Vp an Vn and by using AMS gui i have debugged the xadc converted value.

  Now without using any GUI , i would like to debug only the Vp and Vn converted value by using ILA, i have attached the block diagram of my design and the specifications.kindly refer it.

My Problem is i have selected channel sequencer and i need to visualize only the xadc data of Vp and Vn input signal. But in Do[15:0] am geeting all the datas like temperature, alarm etc.  KIndly reply me it will be helpful for my research progress.

XADC block dgm.docx

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Hi @jpeyron ,

    In my research work, my target is , the sampling frequency of digitizer should be 260 MHz. Now am using the xadc of Zynq 702. Do you have any idea of ADC  that connects to zynq 702 board, that should have Maximum sampling frequency of 260MHz

 

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I'd recommend you spend a working week "researching" the electrical-engineering aspects.

The ADC may look just as an afterthought to DSP but it will require significant engineering resources (plan for several / many man-months). Long is the list of bright-eyed students / researchers / engineers / managers who have learned the hard way that there is a bit more to the problem than finding two boards with the same connector...

Hint, check how much latency you can tolerate and research "digitizer" cards for PC (or PXI platform). If you don't need a closed-loop real-time system, don't design for a closed-loop realtime system.

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@xc6lx45,

2 hours ago, xc6lx45 said:

I'd recommend you spend a working week "researching" the electrical-engineering aspects.

The ADC may look just as an afterthought to DSP but it will require significant engineering resources (plan for several / many man-months). Long is the list of bright-eyed students / researchers / engineers / managers who have learned the hard way that there is a bit more to the problem than finding two boards with the same connector...

+1

I've been on more projects than I care to count where the digitizer was poorly engineered, and noise from the system (perhaps on the power line) came through and corrupted the measurements.  Since I was the software guy, I'd always try to "fix" this sort of thing in software with the sad reality that nothing I did ever really "fixed" the problem.

Dan

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Hi,

 I would like to know more in detail about the 

 i) How to synchronize the input signal with the ILA capturing data (i.e., each time am capturing different signal in ILA, i would like to capture the same signal all the time by triggering or in some other way) I referred the ILA debugging manual, but still am not clear about the synchronization

ii) The second thing is , is there any  possibility  to increase the ILA window depth to capture the signal for long time. As the maximum depth of the ILA is 131072 samples.

 

Kindly let me know your suggestion for the above.

 

 

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