Hello all, been trying to get the dsPIC30F2010s I received a few weeks
ago programmed. The Warp13a programmer has "beta" support for them so I
thought I'd give it a whirl (really don't want to buy another
programmer, I basically just bought this one...).

Anyways, I have the updated firmware loaded and the new executible,
however no go. Every time I try to do anything I get the following:

C1 Comms Error occurred @ GetByteBin
Failed to receive byte from programmer!
Please Reset Programmer immediately

I tried programming other chips and they all work fine (an 877a, a 876,
a 18F458) so it looks like the programmer isn't doing something right.

First off, how to I place the dsPIC? I click on place and it shows the
standard picture, was that not updated or something?

The beta page on the warp13a site does have a quote from Olin:

_____________________________________________________________________

Olin Lathrop
Super Member

Posts: 747
Joined: Feb. 26, 2004
From: Littleton Massachusetts
Status: offline
 RE: Programming dsPIC30F2010 with M... (in reply to Z28)


Z28, you misunderstand the purpose of the capacitors and resistor.

The problem is that when the target chip drives the PGD line, those fast
edges can couple back onto the PGC line. The target chip therefore sees
extra clocks that the programmer did not produce, and gets out of sync.
The effect is aggrevated by the PGC and PGD lines being next to each
other in the cable ICD2 cable. The whole effect happens within the
propagation time of the signals from the target system to the programmer
and back. There is therefore absolutely nothing that can be done at the
programmer end of the cable to solve this problem. The solution must be
on the target end. This also means it is independent of programmer. I
have done considerable testing on this, and was the person to orginally
report it to Microchip. I have also occasionally mentioned it here.

The solution is to put 22-47pF on the PGD and PGC lines to ground a
short distance from the target chip. In addition, put a 100ohm resistor
in the PGD line between the target chip and the cap. I've been doing
this on all new designs for a few months now, and haven't had a single
problem with the ICD2 and various other programmers.

The resistor and cap on the PGD line low pass filter the PGD signal when
it is driven by the target chip. This reduces the high frequencies that
can couple onto the PGC line. The cap on the PGC line gives it a lower
impedence at high frequencies, thereby making it less suceptible to
coupled noise.

________________________________________________________________________

I've implemented this fix to no avail. Has anyone managed to get the
Warp13a going with the dsPIC or is it just a lost cause? Thanks for any
help. TTYL

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