Reginald Neale wrote:
>
> >Hi,
> >
> >I have a PIC 16c55 that have been running a program for a year.
> >Yesteday I needed to make a minor change in the program.
> >After reprogramming with Picstart plus it dosn't work.
> >
> >Now I can't get _any_ '55 to work with _any_ program !
> >What can have happened ?
> >Can the picstart plus fail to program just the 16c55 ?
> >It still programs my 16c74 okey.
> >
> >/PJ
>
> If you are using MPLAB, it makes strange decisions about how to set the
> configuration bits. If you have programmed other devices in the meantime,
> those settings may be appropriate for the other devices but not for the
> '55.
> In particular, the default setting for WDT is "ON," and if you have not
> used any clrwdt statements in your program, it will hang up and nothing
> will appear to happen.
>
> Reg Neale

Thanks for anwering,
I _always_ check the configuration bits before programming.
But your description of the problem is 100% accurate !
> it will hang up and nothing will appear to happen.

Picstart plus firmware V1.01.00
MPLAB 3.22.02
Picstart plus dev. programmer V1.30.00