Incrimenting a 16bit number with a PIC

[chevymn1964]

Hey Everyone, I have another head scratcher... What would be a good way to incriment and decriment a 16 bit number? Im using a PIC16F676 and programming in assembly... Thanks for any help!

 

[IanP]

"16 Bit Operations on PIC Chips"

http://www.mcmanis.com/chuck/Robotics/projects/pic-16bit.htm

Regards,
IanP

 

[chevymn1964]

Thanks for the reply IanP, I already found that link and I have no clue how macro's work and how to impliment them into my code...

 

[16F676]

DEC_16BIT_NUMBER

	decfsz REGISTER_L,f	
	return		
	decfsz REGISTER_H,f	
	return		
;###################################
INC_16BIT_NUMBER

                incf REGISTER_L,f
                movf REGISTER_L,W 	
	xorlw 0X00 				
	btfss STATUS,Z 			
	return
                incf REGISTER_H,f
	movf REGISTER_H,W 	
	xorlw 0X00 				
	btfss STATUS,Z 			
	return

I usualy use this way. and I didn't get where is your problem.

 

[tr_pic]

You can visit this website for PIC math methods. This one has a huge source code library.

[url]http://www.piclist.com/techref/microchip/routines.htm[/url]

Regards
tr_pic

 

[chevymn1964]

Hey Everyone, I've got it working with modifying the macro verson in IanP's link. Thanks for all the help!!!