Make sure you've disable low votage programming (#FUSES NOLVP)
p.
--
Phillip M. Vogel, President   | "It's not what you've been taught,
Bartal Design Group, Inc.     |  it's what you've learned." (me)
318 Marlboro Road             | +1-201-567-1343 FAX:+1-201-568-2891
Englewood, NJ 07631  USA      | phillip@bartal.com

Johan Fredriksson wrote:
>
> I've tried this on 12C509A and 16F877 with the same result. I'm just looping
> forever reading two pins and sending a text on RS-232. I'm using CCS
> compiler for coding.
>
>    while (-1){
>       if (INPUT(PIN_B3)){
>          printf("B3 High\n\r");
>       } else {
>          printf("B3 Low\n\r");}
>       delay_ms(250);
>
>       if (INPUT(PIN_B4)){
>          printf("B4 High\n\r");
>       } else {
>          printf("B4 Low\n\r");}
>       delay_ms(250);
>    }
>
> Pin B3 gets a logic 1 (4.95V) or 0 (0.01V) and pin B4 is always high. The
> input to B3 comes from a Hall-effect switch. When it detects a magnet it
> gows low and when magnet is removed it goes, of course, high again (pull-up
> to +5V and the Hall acts like a transistor driving to ground). The logic
> output is OK all the time.
>
> When removing the magnet so it goes high again the PIC is dead. But not
> compleatly dead! If I add the magnet again so it goes low the PIC continues
> from where it was again.
>
> Anyone having some hints or ideas? I'm very confused now :-)
>
> /Johan
>
> --
> http://www.piclist.com hint: PICList Posts must start with ONE topic:
> [PIC]: PIC only [EE]: engineering [OT]: off topic [AD]: advertisements

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]: PIC only [EE]: engineering [OT]: off topic [AD]: advertisements