The nop's are there to allow the BCF to take effect before the BSF;- if you
do successive bit operations on a port pin *WITHOUT* at least 1 nop period
between them the results will be *INTERESTING*

3 nop's though are overkill, so I suppose they are there for a specific
delay interval in this code, but note that 1 nop is included after the BSF
too, for port pin settling.

There are better ways of obtaining delays and toggling port pins - in
particular you call specific delay routines and you toggle a bit in an
ordinary, RAM register (PIC file) then copy the *WHOLE* register to the
port.  This allows greater I/O control, code portability and code
readability as you re-use your trusted code in different PICs.

Bye.

-----Original Message-----
From: rad0 [mailto:rden25@MINDSPRING.COM]
Sent: Tuesday, 28 August 2001 16:20
To: PICLIST@MITVMA.MIT.EDU
Subject: [pic]: what does this mean


 BCF    PORTC, 4
 NOP
 NOP
 NOP
 BSF    PORTC, 4
 NOP


THIS is clearing port c then setting port c pin 4, correct?

and are the nop 's in there to give an amount of time to this pulse?

if so, how long is a nop, ???



thanks....

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