gnupic: Which programmer for 16F87X?
Subject:
Re: Which programmer for 16F87X?
From:
####@####.#### (Byron A Jeff)
Date:
12 Sep 2001 20:19:16 -0000
Message-Id: <200109122018.QAA12132@cleon.cc.gatech.edu>
>
> > >
> > > Hello,
> > >
> > > Can you tell me which programmer would be the best/simplest
> > > for programming 16F87X under linux?
> > >
> > > I made one (picprog2.3) with 74hct573, it seems working,
> > > but for two days I can't burn PIC (it reads 0x3fff)
> >
> > That's sounds like my Trivial programmer.
> >
> > Which picprg2.3 subversion do you have: 2.3a or 2.3b. Currently 2.3b is
> the
> > latest but we need to integrate some more changes.
> >
> > Can you verify that you get the correct voltages in an empty socket from
> the
> > picprg2.3 config screen?
> >
> > Let me know. I'd like to help you get the programmer working.
>
> Hi,
>
> I use picprg2.3b, and use 0x10 (16F87x) for programming.
> LPT is working on 3.3v, so I make the data from Rb7 to PC passing 573 for
> proper
> voltages.
> Also the signal on pin 24 (RB3/Vcc) has 300us falls down to 3-4V.
> Should it have some caps?
No. All of the control signals going to the PIC should pass through the 573
as shown in the schematic. If you bypass the 573 for RB3/Vcc then you'll
run into the 3.3V problem again.
BAJ
P.S. Question for Scott/Craig: Any objections to this thread on the mailing
list? Andy set up a Mailing list for picprg2.3 but it seems the questions
are coming here to gnupic.
> Tomorrow I will check it on 5V lpt.
>
> Other voltages seems OK.
>
> jerry
>
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