FMCOMMS4+ZED Devicetree issue

Backing up a bit, does the standard meta-adi build work without changes? If so what was your next step?

-Travis

Yes the standard meta-adi build worked. And the board boots.

Then I tried to just change the device tree (copy and paste) the fmcomms4 into the fmcomms2-3.dtsi

I had the KERNEL_DTB="...fmcomm2"

When that didn't work I then tried to add the files to

petalinux_proj/project-spec/meta-user/device-tree/device-tree.append

Hi,

What you are trying to accomplish is not possible in meta-adi 2019_R1. Note that the variables KERNEL_DTB_PATH and USE_KERNEL_SOURCES were added in a later point in time.

That said, you should still be able to add fmcomms4 in meta-adi 2019_R1 with some extra steps....

In your .bbappend file you should just need to have SRC_URI += "pl-delete-nodes-...". The dts file already exists in the kernel sources, so as long as you correctly set KERNEL_DTB, the build system should find it. In this branch you need to set it here and you need to also add it to the list of supported devicetrees here.

The error you are seeing tells me that your pl-delete-nodes is not really fine as it's not deleting the axi_sysid generated by petalinux.... Maybe take a second look here on how to generate that file.

That said, going to a newer meta-adi version might be a good idea.

- Nuno Sá

Thank you this was very helpful I now can build the petalinux files and the board boots.

When I run iio_info -s I see the first highlight (in image below).

However, when I run python3 and do import adi I get the following error (2nd highlight).

My SD card has 2 partitions. The BOOT and ROOTFS. The boot contains only the image.ub and BOOT.bin created from my petalinux build. 

Is this related to the device tree still or something else? Was I correct in using the FMCOMMS2 HDL project?

Seems to be an issue with py-adi. Libiio works.

Hi,

Sorry for the late reply...

This looks like a mismatch between the bindings and the libiio version installed. How are the bindings being installed? Note that support for that in meta-adi only came not that long ago. Here is the commit for it. And they also have to be included on the image...

Note that this is only supported in master... I honestly do not know if this works in 2019_R1.

- Nuno Sá

Please upgrade libiio and the bindings. Current pyadi-iio versions require libiio v0.23 which added label support.

-Travis