Your opinions please on possible 89LPC901FN programmer product

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We have developed a prototype board and software for the PC to
program and test code for the Philips 89LPC901FN (8 pin DIP).

Currently it only works with the 901 DIP because we think that
will be the easiest chip to prototype circuits with for possible
novices. The 901 does not have a hardware UART but can be bit
banged.

It uses a second 901 to talk to the program via serial port,
(bit banged and not a true RS-232 interface) and this 901 sends
the programming pulses, and read and write bit manipulation
sequences to do the programming of the target chip. The program
on the PC does most of the work.

The target chip currently has a pushbutton switch and LED to
test simple code, and the second (programming) chip can control
power to the target chip to let you quickly program it, then
reset it and power cycle it to run the code just programmed.
It is built and assumes using the internal clock only.

If we make a product out of it we plan to include a bunch of
pads on the board where you can build your own circuits for
testing more code.

My guess is that it would sell for about $50-60 for board, cable,
PS, and software. Doing this with the two Keil boards seems to
be about $100, but they do more chips and are more complicated.

Do you think there is any interest in this as a product?
Flame away! :)

--
Gary Peek                mailto: snipped-for-privacy@mycompanyname.com
Industrologic, Inc.      http://www.industrologic.com
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Re: Your opinions please on possible 89LPC901FN programmer product
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Yes but... the Keil comes with the 4K limited compiler suite. Monitors
etc lots of app notes and support. It also has full circuit diagrams.

The problem is that the Keil kit is done as a loss leader....It is
practically impossible to compete with it commercially. This is good in
that a pro kit is available at a budget price but it also kills the
competition which is a pity.

The other problem is getting the chips. There is a problem that many
silicon distributors have high MOQ's and single parts from Maplin etc
are not cheap. The cost of a board and parts could cost more than kits
like the Keil where parts are bought in bulk.

Silicon companies are doing this not only with dev kits but tools as
well. This is having a similar effect on the low end tools vendors. It
is getting to the stage where you can only do this sort of thing if you
are already a big player of a specialised niche market.


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\/\/\/\/\ Chris Hills  Staffs  England    /\/\/\/\/\
/\/\/ snipped-for-privacy@phaedsys.org       www.phaedsys.org \/\/
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Re: Possible 89LPC901FN programmer product
Original post from Gary Peek:
We have developed a prototype board and software for the PC to
program and test code for the Philips 89LPC901FN (8 pin DIP).

Chris Hills wrote:
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Schematic and sample code included of course. We are assuming
assembly language since the 901 only has 1K of user program
memory, and a free assembler is available, ASEM51 by Heinz
(see our web site for a link).

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Good point and I understand this, that is why we have also
considered including _extra chips_ or even _another PCB and
chip_ so that the user could program their chip on the
programming/prototyping board, test it in the prototyping
section of this board, and then build it on the extra board.

Again, comments welcome about this approach.

Why would we do this? Well, we think the Philips 901 is a
pretty neat chip, having the 8051 core, more or less.

All of this assumes very simple projects on a budget or
learning about micros. Otherwise, there are things much
better than an 8 pin micro in a DIP package.

--
Gary Peek                mailto: snipped-for-privacy@mycompanyname.com
Industrologic, Inc.      http://www.industrologic.com
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Re: Possible 89LPC901FN programmer product
Hello Gary,

there is a programming adapter from Philips that plugs into the Keil
MCB900 board. They whole system, board + adapter is less than $100
($98). There is however a need for small quantities LPC901s that are
hard to get by through distributors.

May be if enough people request this from Digikey, they would start to
stock these nice little devices.

My opinion, your time and money would not be well spent doing a
dedicated programmer for the LPC901 but a great application example
would be to sell the 901 as a real-time clock replacement. Clocking
the RTC-block with 32 kHz external and using the 1k to provide
time-of-day functionaility. Communication to a host devices could be
done through bit-banging, switching the internal frequency to 7.373
MHz while the RTC continues to run from 32 kHz.

What would you think about that?

Cheers, Schwob

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Re: Possible 89LPC901FN programmer product
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Ho... it is a 932 (and soon apparently a 935) with 8-K of space and a 4K
C compiler.


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Good idea except, as i discovered today for 39 USD you can get a 90*
progammer board that is and add on to the Keil MCB900.....

It is on the Philips web site.



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\/\/\/\/\ Chris Hills  Staffs  England    /\/\/\/\/\
/\/\/ snipped-for-privacy@phaedsys.org       www.phaedsys.org \/\/
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Re: Possible 89LPC901FN programmer product
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Oops, can't say that I know what they are, although I heard
Philips was coming out with some others. (I was hoping for
one with an A/D, not just analog comparator.)

So far we have only done 901FN.

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Yep, if you already had a Keil board that would be the thing
to do.

All of these tools I see seem to try to be everything to
everyone instead of just being plain simple when simple
will do (assuming you select one chip to work with.)

Of course Philips has made so many variations...

--
Gary Peek                mailto: snipped-for-privacy@mycompanyname.com
Industrologic, Inc.      http://www.industrologic.com
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Re: Your opinions please on possible 89LPC901FN programmer product
Perhaps you should do a P89LPC932 board as the biggest family member in the
LPC900 series , of which the LPC901 is a sub-set of features...  Keil have
this for $59 USD with limited complier etc.

Can you compete with that!

JG

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