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All about PIC microcontrollers

Within these pages, you can find many useful pieces of code mostly in assembly for the Microchip PIC micro controller family. A lot of people have spend many hours trying to put the bits and bytes together. If the code is NOT written by a member of the PCB Heaven community, then a link will be added above the code with the original website that this code was found.
Because the code is copied to our servers, you should know that:

  • The responsible web master of the website that the code is taken, has been informed and he has agreed to copy the code
  • All emails from the above contact have been kept as records but due to personal privacy cannot be shown in public.
  • The author of the code is always clearly indicated above the code. In some cases the author is unknown. If you happen to be the author of the code or you know the person who wrote it, please inform us by email and it will be added ASAP.

We would personally like to send the credits to all the people that managed to write some very interesting code and publish it, and special thanx to the people that originally hosted those code snippets and gave us the permission to copy them.


View code
8 bit
Author: Nikolai Golovchenko
This code was originally located @ http://www.piclist.com


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;**********************************************************************
;by Nikolai Golovchenko
;8 bit SQARE ROOT
;ACCB0 input/output
;TEMPB0, TEMPB1 used for temporary storage
;66 cycles execution time
;20 words of program memory
;3 bytes of RAM
;**********************************************************************
Sqrt8
movlw 0x40
movwf TEMPB1
clrf TEMPB0
sqrt8a
movf TEMPB1, w
iorwf TEMPB0, w
subwf ACCB0, w
btfsc _C
movwf ACCB0
rrf TEMPB0, f
movf TEMPB1, w
btfsc TEMPB0, 7
iorwf TEMPB0, f
bcf TEMPB0, 7
rrf TEMPB1, f
rrf TEMPB1, f
btfss TEMPB1, 7
goto sqrt8a
movf TEMPB0, w
movwf ACCB0
return
;**********************************************************************

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