Running VTC self test freezes on ZYBO

[toni_birka]

Hello,

My application freezes after I run the self-test for a video timing controller. What is the cause of the problem? 

The used Block design is shown below and project files are available on the following link: https://www.dropbox.com/s/tjd21flsmxn650i/ZYNN_project.rar?dl=0

Best regards,

Toni

[florentw]

Hi @toni_birka ,

Do you have the HDMI connected? I believe you need to have an active HDMI clock else the VTC will return a slave error on the AXI4-Lite interface:

So any access to the IP will report an error. This is probably what you are experiencing

[florentw]

Hi @toni_birka ,

Do you have any update on this? Did my reply helped you?

If your question is answered or your issue is solved, please kindly mark the response which helped as solution (click on "Accept as solution" button below the reply)

If this is not solved/answered, please reply in the topic giving more information on your current status.

Thanks and Regards,

[toni_birka]

Hello,

sorry for the late response. I’m pretty sure that it has active clock, because i have connected GoPro camera on HDMI input.

Best regards,

Toni

[florentw]

Hi @toni_birka ,

You migth want to make sure the clock is here. I would recommend to do some logic to toggle a LED to make sure you have the clock.

[toni_birka]

Hi @florentw,
Can you tell me where should I connect an LED? I mean on which pin is that clock available?

Best regards,
Toni

[florentw]

Hi @toni_birka ,

Check the xdc file or user guide for the zybo to find a led you can use. And the clock is the one connected to the clk input of the vtc

[toni_birka]

Hi @florentw,

I connected the LED to the Pixel clock which is input to the vtc, and edited the .xdc file, but when I tested it LED didn't work. I use GoPro camera as the HDMI source, and it's working when I connect it to the TV via HDMI. What should I do to fix it?

Best regards,
Toni

[florentw]

Hi @toni_birka ,

Well you need to have the gopro working...

What could happen is that the Gopro does not support DVI over HDMI. This might be why you are not getting the clock.

So either change your source or use a HDMI RX solution (true HDMI not DVI over HDMI).

[toni_birka]

Hi @florentw,
well, I was using GoPro as a source when I was testing the hdmi_in example and it contains the DVI2RGB IP and it worked. As well, I'm using the same block design as Adam Taylor in his project(https://www.hackster.io/adam-taylor/creating-a-zynq-or-fpga-based-image-processing-platform-e79394), and he used an action camera similar to GoPro as a source.
Do you have any details/links/references for that solution, where I can find more information about implementation?

Best regards,
Toni

[toni_birka · Accepted solution]

Never mind, I've found what was the problem. I named external port HDP instead of HPD, but haven't noticed it before in critical warnings.

Best regards,
Toni