On 23/09/10 16:00, Olin Lathrop wrote:
> That's a good start.  Now look at PGC and PGD.  Maybe you get lucky and s=
ee
> one of them stuck high or low.

Both look good to me. Time to break out the big guns...

I just resoldered the ICSP connector, and filled the ICSP vias with=20
solder. Basically, I've got six SMD pads on the bottom side of the board=20
directly under the PIC. GND goes straight to the BL ground plane, while=20
VCC, MCLR, PGC and PGD all have vias to take them to the top layer. Two=20
drill holes and a generous keepout make it damn close to impossible to=20
put a test probe in wrong (and also make it possible to add a clip to=20
hold the connector in place).

I'm not sure if the PTH vias were a little weak, or if I had a dry joint=20
on the ICSP connector, but the latter is more probable IMO: the solder=20
joints look MUCH better now I've reterminated the cable, retinned the=20
pads and used a generous coating of gel flux to solder the two together.

Evidently I need to make myself a "Mike Harrison style" ICSP plug...


Now I'm getting this in MPLAB:

Found PICkit 2 - Operating System Version 2.32.0
  PICkit 2 Settings: Using target power always.
  Target power detected ( 3.36V)
  PIC18F85J50 found (Rev 0x3)
  PICkit 2 Ready


The ICD2 is happy, too:

Connecting to MPLAB ICD 2
....Connected
  Setting Vdd source to target
Target Device PIC18F85J50 found, revision =3D Rev 0x3
  ...Reading ICD Product ID
  Running ICD Self Test
  ...Passed
  MPLAB ICD 2 ready for next operation

Now to write a USB bootloader! Or "borrow" Microchip's, one or the=20
other... :)

--=20
Phil.
piclist@philpem.me.uk
http://www.philpem.me.uk/
--=20
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