RGB2DVI, DVI2RGB support for Spartan 7


Recommended Posts

Hi,

Are the RGB2DVI and DVI2RGB IPs not supported in Spartan 7 for lack of supported IOs or lack of supported boards from digilent?

If it is due to lack of supported boards, can we use the IP targeting a spartan device by add spartan to list of supported devices in IP file?

Thanks ,

Ajay

Link to post
Share on other sites

Hi @ajaykumar,

It's for the lack of appropriate IO interfaces on Digilent's two Spartan 7 based boards (Arty S7 and Cmod S7).

If you have your own Spartan 7 board that has built in IO interfaces, then you should be able to edit the component.xml file to add the lines

<xilinx:family xilinx:lifeCycle="Pre-Production">spartan7</xilinx:family>
<xilinx:family xilinx:lifeCycle="Pre-Production">spartan7l</xilinx:family>

to the <xilinx:supportedFamilies> section which is around line 733.

I haven't gotten to try this yet (and don't have a board where I could actually try a design), but I believe it should work. The caveat with this approach is that you could run into some IP versioning issues, but those can be mitigated.

Let me know if you have any questions.

Thanks,
JColvin

Link to post
Share on other sites

Hi @JColvin

Thank you very much for the details. I have edited the lines and created a Vivado project with these IPs as input and output of the pipeline targeting a Spartan device (xc7s6cpga196-1). I have not faced any issues with respect to versioning. I have also synthesized it, without IO mapping and it went well. 

I will try that as well and get back to you with synth and implementation results. I too do not have a board as of now to test it on hardware. Looking for options. 

Meanwhile, can you clarify on this->  The Arty S7 and Cmod S7 use CSG324 and CSG225 packages respectively and both of them have a decent number of IOs 100 / 150. When you mentioned lack of appropriate IO interfaces, is it that all these IOs were used for other purpose as the intent of the board design is different or is it that the IOs in these parts are not compatible with digilent TMDS IO type?

Thanks and Regards,

Ajay

Link to post
Share on other sites

Hi @ajaykumar,

All of the pins were routed out for other purposes for the board design; you can see the pin assignments on the schematics for the Cmod S7 and the Cmod A7 (available on their Resource Centers, Cmod A7, Cmod S7) and that nearly all of the pins for each board have been assigned as per Xilinx's UG475. Digilent just didn't

In terms of if the IO pins on different Xilinx Artix and Spartan architectures and package layouts are compatible with the Xilinx TMDS typing, the best place to learn these answers would be Xilinx's DS180 and UG471. On a surface level though (I haven't done any detailed research), the pins on the Arty S7 and Cmod S7 are physically compatible. I know that the Cmod A7 does not have any video based connectors on it, but it can be used for video purposes like this talented forum user did:

Thanks,
JColvin

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now