gnupic: picprg
Subject:
Re: picprg
From:
"Mark J. Dulcey" ####@####.####
Date:
20 Mar 2002 16:50:50 -0000
Message-Id: <3C98BC3E.8070608@buttery.org>
####@####.#### wrote:
> There are now two versions which were born from
> original picprg from Brian Lane. Byron made one and
> the other is which I modified.
> I only want to join the two versions into one. AFAIK
> the only main difference is the number of processors
> supported by each one.
> That's shouldn't be a difficult task. I have read
> that BAJ's picprg support 16F84, 16F87x, and 16F62x.
> Anyone missing?
> My version support 16F84, 16F876 (I have not tested
> with others, but I think it should work with 16F87x,
> because the programming algorithm is the same). So I
> should add support for 16F62x and we will have the
> same funcionality which both versions.
> I think I can do it in little time. But I wonder what
> do you think about this. I don't want to be the only
> one using this version.
Yes, the programming algorithm for all the members of the 16F87x family
is identical. To work for all of them, you just have to be able to set
the processor options appropriately; that shouldn't take much work. The
16F7x series is also the same, since they're basically dumbed-down
versions of the 16F87x series with no EEPROM, and 8-bit ADCs instead of
10-bit.
The 16F62x devices are a bit different, because you have to deal with
the oscillator calibration. But it's so cool to be able to get 16 I/O
pins from an 18-pin chip! Besides, they're cheaper than the 16F84A, and
do everything that the older part does and more. For example, the least
expensive version of the 16F84A is currently 3.63 on the
Pioneer-Standard site. The least expensive version of the 16F628 is
2.17, and it has twice as much flash memory. The 16F627, with 1K flash
like the 16F84A, is a mere 1.91. I noticed that the featured-products
screen for the flash parts on the Microchip site doesn't even mention
the 16F84A; I suspect that it's not long for the world.
The next frontier: programming the brand-new 18F parts! Yes, they're
real now; I just received some 18F252 and 18F452 chips from
Pioneer-Standard today. The programming algorithm for the 18F series is
quite different, so it will take some work. Maybe it's time for me to do
some coding...
