please dont rip this site

SX Microcontroller Bit Math Method

Copy unaligned bits from one register to another:

With possibility of "jitter" on destination pin

	setb	RA.4
	sb	C
	clrb	RA.4

ie: Assume the bit is one, then change to 0 if it is not.

Saves 1 instruction over the more standard:

With possibility of error due to change in value on source pin

	snb	C	; load the data
	setb	RA.4
	sb	C
	clrb	RA.4

This macro...

COPY_BIT MACRO   varA_bit,varB_bit
        NOEXPAND
        snb	varA_bit
        setb	varB_bit
        sb	varA_bit
        clrb	varB_bit
        ENDM

...will produce the same output if called like this:

COPY_BIT 3.0,5.4

but can be used on any current bank registers.

Note that according to SASM 1.4 manual macro arguments can not be reserved symbols, e.g. RA, RB, etc.


file: /Techref/scenix/lib/math/bit/cuabrr_sx.htm, 1KB, , updated: 2004/6/10 14:40, local time: 2024/3/29 06:13,
TOP NEW HELP FIND: 
3.219.233.54:LOG IN

 ©2024 These pages are served without commercial sponsorship. (No popup ads, etc...).Bandwidth abuse increases hosting cost forcing sponsorship or shutdown. This server aggressively defends against automated copying for any reason including offline viewing, duplication, etc... Please respect this requirement and DO NOT RIP THIS SITE. Questions?
Please DO link to this page! Digg it! / MAKE!

<A HREF="http://www.piclist.com/techref/scenix/lib/math/bit/cuabrr_sx.htm"> SX Microcontroller Bit Math Method Copy unaligned bits from one register to another:</A>

After you find an appropriate page, you are invited to your to this massmind site! (posts will be visible only to you before review) Just type a nice message (short messages are blocked as spam) in the box and press the Post button. (HTML welcomed, but not the <A tag: Instead, use the link box to link to another page. A tutorial is available Members can login to post directly, become page editors, and be credited for their posts.


Link? Put it here: 
if you want a response, please enter your email address: 
Attn spammers: All posts are reviewed before being made visible to anyone other than the poster.
Did you find what you needed?

  PICList 2024 contributors:
o List host: MIT, Site host massmind.org, Top posters @none found
- Page Editors: James Newton, David Cary, and YOU!
* Roman Black of Black Robotics donates from sales of Linistep stepper controller kits.
* Ashley Roll of Digital Nemesis donates from sales of RCL-1 RS232 to TTL converters.
* Monthly Subscribers: Gregg Rew. on-going support is MOST appreciated!
* Contributors: Richard Seriani, Sr.
 

Welcome to www.piclist.com!

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  .