Drawing timing diagrams/waveforms in source file

[BlackHelicopter]

Example:

-- 
--          __     __     __     __     __     __     __     __     __     __     __    
-- CLK    _/  \___/  \___/  \___/  \___/  \___/  \___/  \___/  \___/  \___/  \___/  \__
--              _______________________________________________________________________
-- RST_N  _____/
--                      ______
-- LD_DATA_____________/      \________________________________________________________
-- 
--        _____________________________________________________________________________
-- DATA_IN___________AA___________________AA________________AA____________AA___________
--            
--                        ______________________________________________________
-- BUSY   _______________/                                                      \______
--        ______________________ ______ ______ ______ ______ ______ ______ ____________  
-- COUNT_i___________0__________X__1___X__2___X__3___X__4___X__5___X__6___X__7_____7___    
--            
--        ______________________ ______ ______ ______ ______ ______ ______ ______ _____  
-- COUNT  ___________0__________X__0___X__1___X__1___X__2___X__2___X__3___X__3___X_4___

How is this done?


This was taken from nand_gates post below:
https://www.edaboard.com/threads/127591/

 

[D.A.(Tony)Stewart]

using monospaced fonts like COURIER NEW

It was once used for more than timing diagrams.

.. _....__.. ___.._____ _____.... _........_...... ___...... _ _.......... _.. _............
../_\../ _\ / __\ \_.. \\_.. \.. /_\.._ __| |_..../ __\ ___ | | | ___..___| |_(_) ___.._ __..
.//_\\ \ \ / /.... / /\/ / /\/..//_\\| '__| __|../ /.. / _ \| | |/ _ \/ __| __| |/ _ \| '_ \
/.._..\_\ | /___/\/ /_/\/ /_.. /.._..\ |..| |_../ /___| (_) | | |..__/ (__| |_| | (_) | | | |
\_/ \_/\__|____/\____/\____/.. \_/ \_/_|.. \__| \____/ \___/|_|_|\___|\___|\__|_|\___/|_| |_|
..............................................................................................

but this site filters out 2 spaces into 1, so I used dots.

Also since Underscore and hyphens exist but no "overscore", lines are crafted using the underscore on the line above.
So in effect a raster scan offset by 1/2 row.

_-_-_-_ _ just uses underscore_ and hyphen - and is not as pretty.

__ __ __ __ __ __ __ __ __ __ __
inserted line
_/ \___/ \___/ \___/ \___/ \___/ \___/ \___/ \___/ \___/ \___/ \__



__ __ __ __ __ __ __ __ __ __ __
_/ \___/ \___/ \___/ \___/ \___/ \___/ \___/ \___/ \___/ \___/ \__

Notice it does work here since extra spaces are gulped

--          __     __     __     __     __     __     __     __     __     __     __     
--    CLK _/  \___/  \___/  \___/  \___/  \___/  \___/  \___/  \___/  \___/  \___/  \_
   _    __   ___  _____ _____     _        _       ___       _ _           _   _             
  /_\  / _\ / __\ \_   \\_   \   /_\  _ __| |_    / __\ ___ | | | ___  ___| |_(_) ___  _ __  
 //_\\ \ \ / /     / /\/ / /\/  //_\\| '__| __|  / /   / _ \| | |/ _ \/ __| __| |/ _ \| '_ \ 
/  _  \_\ | /___/\/ /_/\/ /_   /  _  \ |  | |_  / /___| (_) | | |  __/ (__| |_| | (_) | | | |
\_/ \_/\__|____/\____/\____/   \_/ \_/_|   \__| \____/ \___/|_|_|\___|\___|\__|_|\___/|_| |_|

But in CODE script it is allowed.

 

[BlackHelicopter]

Did you draw that by hand, also what editor do you use?

 

[ads-ee]

It's purely text based using the symbols "_" (underscore), "-" (hyphen), "/" (forward slash), "\" (backslash), "|" (pipe), etc.

I tend to use this quite a bit on this forum as it's easier than using Visio, but you have to set the font to a fixed width font such as "Courier New" otherwise the figures and timing diagrams are distorted by the proportional spaced fonts.

Copy the image in post #2 into a fixed width font (programmers) text editor and you'll see how it's done. You can use GVIM or any other text editor to produce stuff like that (plus a lot of time ;-))

 

[BlackHelicopter]

Thanks for the tips! I currently use Emacs, I thought there might be a shortcut or program to help draw the lines and pulses with the mouse.

 

[ads-ee]

Thanks for the tips! I currently use Emacs, I thought there might be a shortcut or program to help draw the lines and pulses with the mouse.

Both Emacs and vim are open source projects, so maybe you can add that feature into the code!