"ian field" schreef in bericht
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"Oppie" wrote in message
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"nospam" wrote in message
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"ian field" wrote:


"Oppie" wrote in message
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I have the Microchip ICD2 debugger which has both USB (preferred) and
RS-232 connectors. This works under MPLAB. I am pretty sure that the
connection preferences can be set in MPLAB under the programmer tab.
Cheers
Oppie

Thanks for confirming that RS232 is an option - do you have any info on
pin
implementation?

There is a Microchip appnote which describes a LPT programmer and
schematic,
does anyone know if it has a RS232 counterpart? - If anyone knows the
document number, I've probably already downlosded it.

The Microchip ICD2 is dirt cheap and you can buy Chinese clones of it on
ebay for about 1/3rd of dirt cheap.

Hard to see how DIYing anything is worth the trouble and an ICD2 will
give
you in circuit debug too.

There are a bunch of hits for 'ICD2 schematic' found with Google.
Here's one http://www.nebadje.org/doku.php?id=neblab:icd2clone

Hope this helps you.
Still, as 'nospam' points out, the ICD2 is pretty inexpensive and used
ones should be out there.

Oppie


Thanks for the link, that's going to be a "later" project as I'd need a
programmer to program the onboard intelligence of that design.

Are any of the Microchip products "dumb programmers" where the signals on
the RS232 correspond directly with target PIC pins after level shifting -
i.e.:

RTS = RB6
DTR=RB7
&
TXD=VPP ?



Not directly, but http://www.oshonsoft.com/picprogserial.html comes close.
You need a handfull of electronics but no intelligence in the circuit. The
parallel served me well for some time.

petrus bitbyter