Re: [Discuss OpenCPI] Fwd: Fwd: AD9361 ADC/DAC Test Applications

From: Davis Hoover <dhoover_at_geontech.com>
Date: Fri, 03 Apr 20 14:44:50 -0400

The AD9361 BIST PRBS mode utilizes an on-AD9361 LFSR. The OpenCPI
applications for both the AD9361 BIST PRBS, which verifies the ADC
interface, and the AD9361 BIST loopback, which verifies the DAC and ADC
interface, each utilize the same bitwise LFSR verification on the .out
file(s).

---------- Forwarded message ---------
From: Brian Padalino <bpadalino_at_gmail.com>
Date: Fri, Apr 3, 2020 at 2:34 PM
Subject: Re: [Discuss OpenCPI] Fwd: Fwd: AD9361 ADC/DAC Test Applications
To: Davis Hoover <dhoover_at_geontech.com>
Cc: <discuss_at_lists.opencpi.org>


On Fri, Apr 3, 2020 at 2:17 PM Davis Hoover <dhoover_at_geontech.com> wrote:

> No worries. It may be helpful to run the target-*/calculate...
> executable on the .out files for both the ADC and DAC tests to observe
> whether the data looks like reasonable LFSR data. Check the arguments
> on that executable, there should be an option for printing out the
> 0s/1s which make LFSR behavior obvious. It's also useful to parse the
> output for, e.g. "1 of which had bit errors"
>

Just for clarification, do you mean PRBS or LFSR? It seems on the DAC side
there is a mode for sending LFSR data into the device, and reading it back
out versus the PRBS which is internally generated to the AD9361.

Which do you mean for this?

Thanks,
Brian


Received on Fri Apr 03 2020 - 18:44:50 CDT