Clrf Pcl

[TronicBrain]

Recently I was making a program of advanced security access door using a 3X4 keypad
and PIC 16F630 which had efforts system and alarm system and timer for invalid presses
and tamper.
and it was complicated somehow

An idea came to mind when I needed to make reset to the whole program when the program in five level subroutine
It was
CLRF PCL

But several problems had occurred after doing that
I really don’t remember the reason but I were in doubt that this method is right to make a software reset.

Any one tried to do that before?

 

[akg]

when u r doing like that , the status,w , stack , all r keeping there previous values , which will cause problems. why don't u connect an o/p pin back to mclr ? also visit https://www.electro-tech-online.com/threads/rebooting-a-pic-the-crude-nasty-way.20179/

 

[Papabravo]

The port pin to MCLR may work but it will probably go high impeadance as soon as MCLR* is recognized.

To do a clean hardware reset

1. Disable Interrupts
2. Allow the watchdog timer to expire and force a reset by executing the following assembly language code

        bcf   INTCON,GIE
loop:
        goto  loop

or the equivalent c code

    GIE = 0 ;  /* disable interrupts */
    while(1) ; /* execute the null statement until the "dog" expires */