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FPGAs 101 by Gina Smith

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1.7. File Structure

The VHDL file structure consists of three sections: the library declaration, entity section, and architecture section with an optional header section.

1.7.1. Optional Header Section

As stated before, the header section is completely optional but highly suggested. However, I found the revision history to be beneficial, especially when modifying someone else's code. When I fix code problems, the revision history enables me to see if the current problem existed before any previous code changes. I have mixed feeling about keeping the prereleased code revision history in the released code. It is a good idea to have the revision history while developing, just in case someone else inherits the code. However, for the released ...

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