Analog Discovery 2 vs Raspberry Pi 3

[hamster]

Hi. I've replaced my Cubieboard with a Raspberry Pi 3, and it runs the ARM version of Waveforms really well. With an Electronics Explorer everything works sweet.

With the AD2, it complains about supply and/or AUX voltage, even with a 5V 3A power pack attached (The power supply panel indicates that the AUX supply is present so I know it is working well). The USB voltage usually shows as 4.92V at a few 10s of mAs

I've tried with 2.5A USB PSU => Pi3 => Powered Hub => AD2, as well as 2.5A USB PSU => Pi3 => AD2. I also get a "unsufficent power". I've tried a few different USB cables too.

The USB 2.0 spec, according to Wikipedia is 5V +/- 0.25V, so anything above 4.75V should be possible. Is there any hints?

If I wanted to make a USB dummy load and test the voltage drop, what specs should I be checking for?

 

[Andras]

Szia @attila,

Now that Raspberry Pi 4 Model B is out, do you see any chance that WaveForms will work with it?

[attila]

Szia @Andras

I don't know.
With RPI 1B+, 2B, 3B, 3B+ the problem could be related to the 4xUSB hub or its driver. According the reports it is working with model A which has a different USB circuit, as well with other ARM boards.
I hope we will be able to order a 4 B soon to test it.

[attila]

Hi @Grimmers

Thank you for the detailed information.
The failure on USB 2 port is similar to the ones received on previous RPi B models, "Communication error... ERC 0x02" which indicates reading/IN timeout, loss of data in device to host transfers. On previous version the data was more often corruptly received, resulting wrong device status reading, voltage, current...
Lets hope the USB 3 port will be reliable.

[rprr]

@Grimmers -- Many thanks for your detailed report, Since it's been more than a month, is the Pi 4 still working fine with the AD2 and is reliable.

[JColvin]

Hi @rprr,

It looks like attila accidentally tagged the wrong user, but you can see his report on using the RPi4 rev B above this post (link in case the post gets moved).

Thanks,
JColvin

[attila]

Hi @JColvin @rprr

It looks like all the USB 2/3 ports of RPi4B are working reliably with AD2.

I have updated the post:

 

Edited August 21, 2019 by attila

[FloMai]

hey guys has any body ever tried a Banana Pi M2 Berry + AD2?

BR Flo

 

[scootergarrett]

The AD2 working with the pi4 is THE BEST.  Because I complained about it not working a long time ago I should praise it working now.

[scootergarrett]

Now I'm having trouble install on the same Raspberry pi 4 with the updated OS "Debian GNU/Linux 12 (bookworm)"

Has anyone else had issues with the new OS or is it just me?

Thanks

[attila]

Hi @scootergarrett

If you have problem accessing the device after Linux update, reinstall digilent.adept.runtime to make sure the udev rules are properly set. This is needed for Analog Discovery 1,2,3 and Digital Discovery.