gnupic: Problems with '873 chip.
Subject:
Re: Problems with '873 chip.
From:
####@####.#### (Byron A Jeff)
Date:
9 Jun 2001 11:56:04 -0000
Message-Id: <200106091156.HAA03630@cleon.cc.gatech.edu>
>
>
> Hi,
>
> I have a project with a pic16F873 chip. I can't get the chip to do
> anything but sit there: We have a couple of leds, and turning the
> pins into outputs, and making the leds go on, doesn't work.
>
> and use "gpasm" to assemble it.
>
> Then I use picprg-2.2 to program it into the PIC.
This is probably the problem. Where did you get picprg-2.2? Brian's original
version doesn't work with the 87x series of chips because the erase sequence
he has programmed isn't the one that's specified in the programming manual.
>
>
> This toolset seems to work for the PIC16F84, but for the '873 it
> doesn't: The chip doesn't come into action.
>
> We've verified the clock, and we've explicitly given it an extra
> (manual) "MCLR". The 5V looks good.
>
> Does anybody have experience with the '873? Is there something stupid
> that I'm doing wrong? Other stuff to check?
Especially since the toolchain works for the F84, I'd suspect picprg2.2. I
have an updated version that takes care of the parport issue in the 2.2/2.4
kernel, and adds an alternate erasure/programming sequence for the 87x. It
works in limited testing with 16F877 parts. Let me know and I'll make it
available.
BAJ
