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'PicStart'
1995\12\14@061945 by Glyn Davies 'Gryn'

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With regards to programmers, it would be nice to be able to use
my current programmer, (a PicStart 16C of some form :)
under UNIX.  It seems a real shame to have to fight to get to a PC
with all the programming stuff around, when we've got literally loads
of Sun's around, which I can attempt to develop on with the GNUPIC tools :)

So to that end, can anyone out there provide a copy of the protocol used to
talk to the PicStart boxes, or is it shrouded in secrecy.

Cheers,

Glyn D

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Glyn D / http://www.cs.man.ac.uk/~daviess / Computer Science 3rd year

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                                                       -- fortune

                                    "What if everyone felt like that?"
                                                       -- Catch 22
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1995\12\17@125640 by Adrian Godwin

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In message <spam_OUT9512141120.aa09589TakeThisOuTspampunt-1.mail.demon.net>, Glyn Davies 'Gryn' writ
es:

>So to that end, can anyone out there provide a copy of the protocol used to
>talk to the PicStart boxes, or is it shrouded in secrecy.
>

This has come up several times on this list, but so far with no response
from Microchip. I don't know if anyone has asked them directly.

However, in use, the interface does seem to involve a large amount of
waving of the hardware handshake lines (more than would be reasonable
for normal hardware handshaking) so there's a suspicion that these
lines are used for something directly related to the higher level
protocol - packet framing, perhaps.

Generic Unix isn't particularly efficient at driving handshake lines in
sync with async data, as it requires direct control of the UART and
circumvention of the kernel's buffering. This would therefore require
custom drivers for each Unix version around, which rather destroys the
point of hardware-independent source code.

It's probably better to use a design like Robin Abbott's PIC programmer
(which I think can handle a wider selection of devices than either one
of the PICSTARTS alone) and has a documented interface that uses only
the serial lines.
Perhaps someone has already written Unix host program for it - I'm not sure.

-adrian

1995\12\17@131546 by Alex Rotenstein

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Can anyone tell me where Intel components (8253 programmable interval
timer) data sheets can be found?
Thanks

1995\12\18@212150 by John Welling

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Try http://www.hitex.com/chipdir/chipdir.html


'PICSTART'
1998\02\19@074256 by Mihai Sebastian MUNTEAN
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Hi ,
 I am interested by PICSTART (PLUS) .
 Please help me with information about it (diagram , prices)
 I'm sorry but I don't speak english very well.

Regards
ADY.

1998\02\19@115706 by PATEL D

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>Hi ,
>  I am interested by PICSTART (PLUS) .
 >Please help me with information about it (diagram , prices)
 >I'm sorry but I don't speak english very well.

Look at Microchip's web page on:-

http://www.microchip.com

I just bought the PICSTART for about 125-00 British Pounds.
The PICSTART is good for all PIC 16Cxxx devices.

Dav

1998\02\20@110203 by Robert McAtee

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The PICSTART PLUS will also handle 17Cxx according to my doc's. I paid a
little over $200 for mine. It included MPLAB software. It's just a plug and
go and works great in WIN95 also 3.1, (I think). The Zero Insertion Force,
(ZIF), socket will take 8, 18, 24, and 40 pin devices.  ==Mac==
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At 05:00 PM 2/19/98 GMT, you wrote:
{Quote hidden}

1998\02\20@110613 by Mark Birks

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Does anyone know if the PICSTART B software/ROM can be upgraded to
porgram the devices not included in B ??

> {Original Message removed}

1998\02\20@135202 by H.P.d.Vries

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Robert McAtee wrote:
>
> The PICSTART PLUS will also handle 17Cxx according to my doc's. I paid a
> little over $200 for mine. It included MPLAB software. It's just a plug and
> go and works great in WIN95 also 3.1, (I think). The Zero Insertion Force,
> (ZIF), socket will take 8, 18, 24, and 40 pin devices.  ==Mac==

Works (great? what program really works great under windows?) under
win311. Well, here it does ;)

{Quote hidden}

1998\02\21@124211 by Brian Schousek

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Note however that the PICSTART PLUS will *not* work with Windows NT. Plans
to include NT support from Microchip seem to be 'sometime in the medium
future,' in other words don't hold your breath. Anybody have software for
the PICSTART-16C that will program 16c84s? That can at least be run in DOS
and we have several lab machines capable of running DOS but that I wouldn't
put windows on for a bet.

Brian
{Original Message removed}


'Picstart'
2003\06\11@065904 by Ihsan Cicek
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Hi

Is it possible to use PICSTART Plus as an In circuit serial programmer? for example Can we use a properly wired IC socket to obtain and carry programming signals to target board? Does anybody have experience on this? thanx

ihsan

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2003\06\11@080754 by Bob Axtell

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part 1 1248 bytes content-type:text/plain; charset="us-ascii"; format=flowedYep, it works fine.

I use a quality machine-pin socket and solder the wires right into the
holes, then run the wires over to the socket, distance not over 6".

One problem is that the PICSTART can't deliver a lot of current, i.e. it
designed to supply current to one chip only. So if you don't have the PIC
isolated, you might have problems.

I have enclosed a PDF on how to isolate the PIC from the rest of the board,
so ANYTHING will program it. It uses a low-drop schottky diode as the
isolator, so there is NO impact on speed or operation. Be sure the have a
bypass cap, at least 0.1uF.

Good luck!

--Bob

At 01:54 PM 6/11/2003 +0300, you wrote:
{Quote hidden}

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part 2 12001 bytes content-type:application/pdf; name="TEST3.pdf" (decode)

part 3 2 bytes
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'Picstart'
2003\07\25@183411 by Larry G. Nelson Sr.
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You can but it is not recommended because it does not have the drivers as
strong as the ICSP for the Promate2. Keep the wires short and pay attention
to power up sequence and other things on the lines and it has worked for me
and several clients.

At 01:54 PM 6/11/03 +0300, you wrote:
{Quote hidden}

Larry G. Nelson Sr.
.....L.NelsonKILLspamspam@spam@ieee.org
http://www.mchipguru.com

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2003\07\25@184652 by Chris Fox

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I have tried to use the PICSTART PLUS in this way and had success on some
boards, but failure on a PIC 12C508 board. The board had a large capacitor
between VCC and GND, and the PICSTART program does not wait long enough after
applying power before it begins to talk to the device, so it would fail. I had
to buy a more powerful programmer to do the job. I wrote and asked if
MicroChip could alter the program so that it would wait for power supply
ramp-up, but they refused. In circuits where the PIC is powered by the circuit
already, my PICSTART PLUS with about 8" wires over to the target board has
worked very well with 16F873s and 16F876s - many hundreds of them in fact.

Chris


{Original Message removed}

2003\07\25@191423 by Bob Blick

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>>Is it possible to use PICSTART Plus as an In circuit serial programmer?
>> for example Can we use a properly wired IC socket to obtain and carry
>> programming signals to target board? Does anybody have experience on
>> this? thanx

Yes, use a separate source of +5 to the target board and it works just
fine and quite reliably.

It will almost never work if you let the Picstart supply the +5.

-Bob

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2003\07\25@234648 by Bob Axtell

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part 1 2853 bytes content-type:text/plain; charset="us-ascii"; format=flowedAll of my designs allow the PICSTart, PIC16PRO, PICPRO40, and almost all
the rest of them work for a programmer.

What I do is to diode-isolate the PIC and its MCLR pullup resistor VDD
line. This allows a programmer- ANY programmer- to powerup ONLY THE PIC. I
use a small (.1uF max) cap on the isolated VDD segment so it will work
properly in the product.

The diode is a small SOD123 (0603) schottky 30V type, so it loses literally
NO board space. The drop across the diode is approx 60mV, so never effects
anything in normal operation.

I am enclosing a PDF schematic of it.

At 05:45 PM 7/25/2003 -0500, you wrote:
{Quote hidden}

>{Original Message removed}
part 2 12001 bytes content-type:application/pdf; name="TEST3.pdf" (decode)

part 3 210 bytes content-type:text/plain; charset="us-ascii"; format=flowed
   --------------------------
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