gnupic: Re: CUMP and programmers for Linux
Subject:
RE: CUMP and programmers for Linux
From:
"James Newtons' MassMind" ####@####.####
Date:
7 Jan 2002 19:51:58 -0000
Message-Id: <005801c197b4$6dc4b540$0600a8c0@efplus.com>
the CUMP project has this figured out.
http://www.piclist.com/techref/piclist/cump
One of the main points of the CUMP project was that each daughter board
would target one "type" of chip. The DBs are doing the same thing that the
"personality modules" in the Needhams EMP-20 do. Routing signals.. but they
are also potentially generating signals, doing IO expansion, AND most
importantly, storing a "token" program that tells the main board how to
program the device and use the extra hardware on the DB.
This approach is a little more expensive per each type of device supported,
but much less expensive for the main unit and MUCH more flexible.
---
James Newton, webmaster piclist.com (former Admin #3)
####@####.####
1-619-652-0593 VM 1-208-279-8767 FAX
PIC/PICList FAQ: http://www.piclist.com or .org
-----Original Message-----
From: Rogier Wolff ####@####.####
Sent: Tuesday, January 01, 2002 14:03
To: James Newton's Massmind
Cc: ####@####.#### ####@####.####
Subject: Re: CUMP and programmers for Linux
Importance: Low
James Newton's Massmind wrote:
> P.D. If anyone knows of a device requiring more than a supply
> voltage and a programming voltage to program it, please, let me
> know.
The problem that I see with such a "universal programmer" is that you
need good "powerful" drivers for signals like the "5V" and "GND" for
the "device under consideration". Those are "expensive".
For special signals, you need to be able to quickly change them. To do
some programming.
Any reasonable microprocessor can do the "change some signal quickly",
but the ways of changing them would depend on the device to be
programmed. And that would require you to program the controller anew
with the algorithms for the current device. Having a universal device
is so nice if you don't have to reprogram it. It's tricky to make it
general enough that you can just send it something like "this is a
PIC, it's PCLK signal is pin 14, and it's PDATA is pin 15, and here is
the program data......"
Roger.
--
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