please dont rip this site

scenix lib io osi1 pwm pwms

;pwm.src
;
; Device data
;
		device	pins28,pages4,banks8
		device	turbo,optionx,oschs

		reset	start			;set reset jump address
;
;
; Variables
;
		org	$08

temp		ds	1			;temporary workspace

		org	$10

acc0		ds	1			;pwm accumulators
acc1		ds	1
acc2		ds	1
acc3		ds	1
acc4		ds	1
acc5		ds	1
acc6		ds	1
acc7		ds	1

duty0		ds	1			;pwm duty cycles
duty1		ds	1
duty2		ds	1
duty3		ds	1
duty4		ds	1
duty5		ds	1
duty6		ds	1
duty7		ds	1
;
;
; Interrupt routine
; update eight 8-bit pwm's on rb pins at 1MHz
; total service time is 32 clocks
; at 50MHz, 18 MIPS are left over for main app
;
		org	0
					;3	;interrupt entry
		add	acc0,duty0	;2	;update pwm0
		rl	temp		;1
		add	acc1,duty1	;2	;update pwm1
		rl	temp		;1
		add	acc2,duty2	;2	;update pwm2
		rl	temp		;1
		add	acc3,duty3	;2	;update pwm3
		rl	temp		;1
		add	acc4,duty4	;2	;update pwm4
		rl	temp		;1
		add	acc5,duty5	;2	;update pwm5
		rl	temp		;1
		add	acc6,duty6	;2	;update pwm6
		rl	temp		;1
		add	acc7,duty7	;2	;update pwm7
		mov	w,<<temp	;1
		mov	rb,w		;1!	;output pwm states
		mov	w,#-50		;1	;repeat every 1us
		retiw			;3 /32	;interrupt exit
;
;
; Main program
;
start		mov	!rb,#%00000000		;make rb outputs
		mov	!option,#%10011111	;enable rtcc interrupt

:loop		;(update duty0-duty7)
		jmp	:loop


file: /Techref/scenix/lib/io/osi1/pwm/pwms.src, 1KB, , updated: 2002/3/12 21:21, local time: 2014/11/27 20:18,
TOP NEW HELP FIND: 
54.91.45.143:LOG IN

 ©2014 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/io/osi1/pwm/pwms.src"> scenix lib io osi1 pwm pwms</A>

Did you find what you needed?

  PICList 2014 contributors:
o List host: MIT, Site host massmind.org, Top posters @20141127 RussellMc, Richard R. Pope, IVP, John Gardner, alan.b.pearce, David C Brown, James Cameron, Bob Blick, Isaac Marino Bavaresco, Josh Koffman,
* 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!

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  .