Hi Mark,

the very simplest way would be in-line code (below). It's not too
inefficient

The 500ms delay routine depends on the speed you're running at.
You might use one of the timers to do it or a counting loop.

The WDT could be used, as its timing is based on the internal 31kHz
RC oscillator.

WDT is affected by Vdd and temperature but it will do if you just
want approximate. You might not actually be able to get the WDT
period required by simply setting the pre-scaler. It's got a nominal
16ms value (after reset, unchanged by the user) so counting 31
WDT periods would get you in the ballpark

Often in my s/w I need various approximate delays. I'll write one
that takes perhaps 100us, 1ms or 10ms and call it as many times
as necessary to get the total delay needed

eg

msdelay  movlw  0xf6             ;call 100us 10 times
         movwf  cnt1
x10      call   delay100
         incfsz cnt1
         bra    x10
         return

;100us delay (approx)

delay100 movlw  0x7d             ;at 16MHz
         movwf  cnt2
         incfsz cnt2
         bra    $-2
         return

Joe

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

loop

bsf D5
call 500delay ;0.5s with LED on
bcf D5
call 500delay ;0.5s with LED off

bsf D3
call 500delay
bcf D3
call 500delay

..... and so on

bsf D7
call 500delay
bcf D7
call 500delay

goto loop ;repeat

500delay

Routine which delays for 500ms

return


-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2016.0.7539 / Virus Database: 4556/12065 - Release Date: 04/19/16

--=20
http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.