Design of flit fifo of RaveNoC Router using Block RAM for area optimization in FPGA platform

[madhumita-mukherjee]

Hi Anderson,

I was exploring the RaveNoC Router for the implementation in FPGA domain, as I thought that RaveNoC router is more suited for ASIC design purpose. I have attempted to optimize LUT counts through design of Block RAM for fifo. This design will help for Xilinx FPGA implementation. I have made both the design configurable using generate statement. I am giving the link for the code and the snapshot of synthesis for both the design. Further, I am attaching the simulation waveform for block RAM fifo. Here the Block RAM has 2 clock cycle read latency. Could you please review the code and the results and let me know your feedback.

Thanks, Madhumita Mukherjee.

code link: https://github.com/madhumita-mukherjee/RaveNoC-router.git

[aignacio]

Hey @madhumita-mukherjee, thanks for your contribution, I have been quite busy lately but for sure I'll take a look and if that works in the regression I can consider adding as a parameter for sure. Have you tried running the regression set of tests considering such design?

[madhumita-mukherjee]

Hi Anderson,

Thanks for your response. As you have indicated, I have to run regression test. So is it required to run the full set of regression tests, or can I run only "test_ravenoc_basic" and "test_all_buffers" considering that my changes are related to the design of flit fifo.

Regards Madhumita.

[aignacio]

Hey @madhumita-mukherjee for every change, independently of number/type of changes the full regression needs to pass in order to embedded this change.

[madhumita-mukherjee]

Hi Anderson, Thanks for the response. I will set the proper environment using cocotb and Verilator to perform the full regression test. As I have done simulation using Vivado only.

Regards Madhumita

[aignacio]

@madhumita-mukherjee please also consider adding this option as a define here that we can either enable or disable too.

[madhumita-mukherjee]

Hi Anderson,

I have tried to set environment using Verilator and Cocotb for the performing the regression test "test_all_buffers". I have successfully run some programs in Verilator. But in case of Cocotb, i am not comfortable with this tool. I have installed it and tried small test code to run, but i can't able to do it. If possible please help me to run a sample code in cocotb using Verilator as the simulator.

Regards, Madhumita

[aignacio]

Hey @madhumita-mukherjee , please try to start with this https://github.com/aignacio/ravenoc#-quickstart-regression, it'll run all the regression tests, you need to consider that the tests were written in python using cocotb framework and they cover most of use cases and different corners, unfortunately I don't plan to have the test methodology due to the overhead added to this task. Cocotb will call verilator in the bkg to run the tests described in the folder tb

[madhumita-mukherjee]

Hi Anderson,

Thanks for the help. I will do accordingly and step by step as you have described.

Regards, Madhumita

[madhumitamukherjee]

Hi Anderson,

I have tried to start with the quickstart-regression. It is showing the comment as : "Unable to find image locally". Please help to solve this issue...

Regards, Madhumita

[aignacio]

Please run the command as mentioned in the getting started, this docker image needs to be pulled from the internet once it's available on docker repository with the name aignacio/ravenoc.

[madhumitamukherjee]

Hi Anderson,

I have run the command and now I am getting the image. Next, tox config file not found.

Regards, Madhumita

[aignacio]

It seems that you're not running inside the repository folder. First enter in the folder then run this command.

On Thu, Dec 15, 2022, 06:51 madhumitamukherjee @.***> wrote:

Hi Anderson,

I have run the command and now I am getting the image. Next, tox config file not found.

Regards, Madhumita

[image: docker_pic1] https://user-images.githubusercontent.com/78219119/207791303-0865bb68-5acb-4e2d-bd53-000c5725770a.png

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[madhumitamukherjee]

Hi Anderson,

My test setup are ready now. I have done the quick- regression test. The error that I am getting is Assertion Error.

Regards, Madhumita

[aignacio]

Hey @madhumitamukherjee, you need to take a look at the logs/.fst and debug. =)