Stop the pic working

How to stop the pic working when 1 input goes high? And how to make it resume when the same imput goes low? Please help me...

Hi sgufa,

Quote:

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Originally Posted by sgufa

How to stop the pic working when 1 input goes high? And how to make it resume when the same imput goes low? Please help me...

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You could try the sleep command. Don’t forget the watchdog timer, make sure it is turned on.

Wake up little PIC!
http://www.picbasic.co.uk/forum/showthread.php?t=6377

Permanent sleep
http://www.picbasic.co.uk/forum/showthread.php?t=3128

Try searching the forum for sleep.

Hope that helps,
-Adam-

You've not specified the reasons why the PIC should be stopped (or indeed your definition of 'Stop', or how quickly it should happen, or the state of the PIC when it is stopped), so to experiment, why not simply start with...

Code:

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        LED var PortB.1
        StopPin var PortB.0

        TRISB=%00000001

Loop:        Toggle LED
        Pause 500
        While StopPin=1:Wend
        Goto Loop

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many thanks melanie but i've just did the same. In that way the pic is always ON. I'd want to put the pic in low power mode when the input goes high and then, when the input returns low, wake up the pic in order to resume his work

@ SLEEP

will do the job.

Now depending the PIC you're using, you need to be check which i/o can wake the PIC.

i'm using 16f628a

can you make me an example for the sleep?

Quote:

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Originally Posted by sgufa

i'm using 16f628a

can you make me an example for the sleep?

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main:
@ SLEEP
end

And judging from your other few posts...are you using PicBasicPro or Proton Basic?

I imagined that

but i mean an example with the routine for sleep and awake on input HI/lo

P.S. I use proton+ picbasic v3

Then you are in the wrong forum.
http://www.picbasic.org/forum/
is then a better forum for you.

assuming that Basic is always Basic if anyone is so gentle in showing me how to make my goal, i think I'm able to "port" the code from picbasicpro to proton...

I think Melanie's example in post #3 should do the trick.

Is there something different that you need?

Added: Oops, looking for low power mode. Re-thinking.
<br>

Hi sgufa,

to search the PICBASIC forum, try pasting this whole line into Google:

Code:

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nap OR sleep 16f628a OR PIC16f628a site:http://www.picbasic.co.uk/forum/

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or
to search the Proton forum, try pasting this whole line into Google:

Code:

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low power 16f628a OR PIC16f628a site:http://www.picbasic.org/forum/

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see also
Darrel Taylor’s great post:
A better Search tool for the Forum
http://www.picbasic.co.uk/forum/show...11&postcount=1

-Adam-

Ok, this would be for PicBasic Pro. Tested on an 877, but it should still work with a 628.
How you do it in Proton, I haven't got a clue.

Code:

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@ DEVICE WDT_OFF  ; Disable Watch-Dog timer

DEFINE OSC 4

LED    VAR PORTB.1
StopPin VAR PORTB.0
INTEDG  VAR OPTION_REG.6  ; 0 = falling edge, 1 = rising
INTE    VAR INTCON.4      ; External interrupt Enable bit
INTF    VAR INTCON.1      ; External interrupt Flag
Delay  VAR WORD

INPUT  StopPin            ; Is already default, but just to make sure
INTEDG = 0                ; Interrupt on falling edge
INTE = 1                  ; Enable External Interrupts

Main:
    Toggle LED
    For Delay = 1 to 500
        PAUSE 1
        IF StopPin = 1 THEN
          LOW  LED            ; Turn OFF anything that will draw current
          INTF = 0            ; Clear the Interrupt Flag
          @ SLEEP            ; enter Low Power mode
          GOTO MAIN
        endif
    NEXT Delay
Goto Main

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HTH,

many thanks for the suggestions. I'll give it a try...