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Feb 11, 2023

What is the best way to understand RTL code?

 RTL coding is used to model a Digital Circuits and synthesized it to hardware using various HDL's.Although efficient RTL coding comes through practice and understanding but there are some steps required to be followed:

Step 1:

Learn any one of the HDL among VHDL or Verilog and it's related concepts in depth and along with that make sure to have a good understanding on the Digital Circuits.

Try to execute small pieces of code,simulate the design and then observe the waveform to check it's related functionality.

Take care about the Synthesizable and non-synthesizable constructs and maintain a document for it and prefer to use synthesizable constructs.

Be strict towards the usage of coding guidelines and follow it accordingly and learn about various optimisation techniques.

Study various research papers and other Design papers related to HDL and learn about various Design techniques.Practice as much as possible and follow various technical blogs to learn more.

Step2:

After you completed with the step1 and ready to move towards the next level which involves more real time scenario,you can proceed with the following steps:

Start go through the specification of the Design block or any intended protocol for which you want to RTL code and understanding it's working in detail.

Try to extract out the various features of the block and maintain a document and then subdivide the block into various modules.

Start writing RTL code for each module by following the coding guidelines and then at last create a Top module to instantiate all the submodules by doing proper instantiation and port connections.

Moreover if you have any existed code available with you can go in depth into that code,ran a Testcases and can also learn from the already written code.

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