please dont rip this site

PIC Microcontoller Radix Math Method

ASCII hexadecimal to Binary

by: Peter F.

After looking at the conversion routines above, I figured I'd add my own. Note this routine does no error checking on the ascii input characters. Peter F. tsetsetse at

;convert 2 hex ascii characters to an 8-bit value 
;ascii stored in hichar/lochar, result returned in w 
;hichar/lochar are unchanged 
	swapf hichar,w	;swap hi nibble into result
	btfsc hichar,6	;check if in range 'A'-'F' 
	addlw 0x8F 	;add correction swapf ('1'-'A'+1) 
	addwf lochar,w 	;add lo nibble 
	btfsc lochar,6 	;check if in range 'A'-'F' 
	addlw 0xF9 	;add correction '9'-'A'+1
	addlw 0xCD 	;adjust final result -0x33 


file: /Techref/microchip/math/radix/a2b-2h8b-pf.htm, 1KB, , updated: 2009/4/20 11:11, local time: 2024/7/13 18:42,

 ©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=""> PIC Microcontoller Radix Math Method - ASCII hexadecimal to Binary</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?


Welcome to!


Welcome to!