Connection through Serial gives error but with Ethernet it works fine AD9082

[VighneshBhatVibhatsu]

I'm trying to connect with AD9082 board when using ethernet connection everything works fine. But when trying to connect through USB tho it works fine on the IIO-oscilloscope tool. using the library throughs error telling that self._rxadc and self._ctrl is both NULL hence no channels found. The fpga im connecting to is the VCU118 board.

[VighneshBhatVibhatsu]

When trying to connect to the serial port (when no device is connected through it) on IIO-OSCILLOSCOPE it works perfectly but when trying --> " adi.ad9081(uri="serial:"+port+",115200,8n1n") " it gives error telling me that NONE type dosent have the attribute Channel. when checking it further found that the variable in the logic which is self._rxadc present in the AD9081.py file is showing as NONE. why is this occuring

[tfcollins]

Our VC118 based reference designs do not support libiio over serial out of the box. Have you modified the userspace? If not, can you provide screenshots of IIO-Scope's connection Window actually connected over serial?

[VighneshBhatVibhatsu]

Our VC118 based reference designs do not support libiio over serial out of the box. Have you modified the userspace? If not, can you provide screenshots of IIO-Scope's connection Window actually connected over serial?

The connection was successful only in the iio-oscilloscope app. Not the pyadi library. So using the pyadi for vcu118 isn't possible?? Is there a workaround for this?

[tfcollins]

libiio works the same way in both software packages. Please provide a screenshot of IIO-Scope's connection window with use of the serial context connected as requested. It will provide more details on the connection itself.

[VighneshBhatVibhatsu]

sure, I have attached an image of it connecting and displaying the connection info

[VighneshBhatVibhatsu]

and attached below is a seperate connection using the library with

[tfcollins]

Ok I see the problem now. You are using No-OS.

No-OS provides zero control over AD9081/AD9082 itself. It simply provides you access to the DMAs in the FPGA. You can see based on the devices listed. Pyadi-iio exposes controls of the IIO driver for AD9081/AD9082. Since the drivers, or even limited variants sometimes available in No-OS, are not available when pyadi-iio goes to enumerate them it fails. If you want to talk to the device with IIO you need to use the libiio API directly or create a simple class based off the rx_tx classes within pyadi-iio.

Using just the DMAs alone like in No-OS is not supported in the current pyadi-iio codebase.

If you want to control AD9081/AD9082 remotely, you will need to switch to the Linux driver.

-Travis

[VighneshBhatVibhatsu]

If you want to talk to the device with IIO you need to use the libiio API directly or create a simple class based off the rx_tx classes within pyadi-iio.

Ok thank you for this information could you give the link or explain on how to use the libiio directly if possible.

With regards, Vighnesh

[tfcollins]

Here is the doc for the python bindings https://analogdevicesinc.github.io/libiio/v0.25/python/index.html

Please post on ez.analog.com if you need further support as this is not a pyadi-iio issue

[VighneshBhatVibhatsu]

thank you for your support ill do as suggested by you.

with regards, vighnesh