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Things To Learn in "e"

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'e' What To Learn ?

E language is a vast language, so learning everything in short time is not possible. But to get started or to get to a position where one can write testbench and checker,

 one really needs to learn limited part of 'e' language. Lets assume that you need to develop a testbench as in below figure.

 

In e, we need to code the following components.

  • Base Object
  • Transaction Generator
  • Driver
  • Input/Output Monitors
  • Checker/Scoreboard

Base Object

As seen in earlier section, base object is used across the testbench for communication of data in a standard structure format. Following things are needs to be write a base object in e

  • data types
  • struct
  • sub-types
  • constrains
    • keep
    • gen before
    • soft and hard constrains
  • condition flow control
  • methods
  • printing routines

Transaction Generator

  • Transaction generator is the the one which generates the transactions. To do this job one needs to know the following gen and gen keeping
  • don't gen and physical fields
  • events
  • methods and tcm

Driver
To model driver, one needs to know the following

  • unit
  • packing
  • methods and tcm
  • Interfacing with simulatoz

Input/Output Monitors
Once one knows about base object, transaction generator and drive, then coding monitors are very simple.

  • unpacking

Checker/Scoreboard

To model the checker or scoreboard one needs to know following e languages construct
list and keyed list

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