Hi,
I am unable to program a 18F2431 PIC's using Picstart+, which has the latest firmware.

Reading online I see that others, using different PIC programmers are also having problems.

Has anyone a found a fix or a work around for this problem.?

Eric

 

You are right. There are a lot of issues reported with that chip. Have you tried some of the solutions, such a being sure AVss and AVdd are connected? (http://www.microchip.com/forums/m201072.aspx , post#2) What errors are you seeing?

John

 

hi John,
I am getting the identical problem to that shown on the link you posted.
I have read thru some of the solutions but I am a bit reluctant at this time to change the AV wiring in the Picstart+ prommer.

I was hoping for a firmware solution if possible.
Eric

 

I wouldn't change the PICstart either, but I would make an interposer board that plugs into the PICstart with a socket for the PIC makes the 1:1 connections and that also makes the extra AV connections.

If you're lucky you may be able to just insert two jumpers to make these connections without making the board (which has the huge benefit of testing the concept without making that interposer board).

 

Hi John,
I bit the bullet and modified the Picstart+ as the link suggested, BUT as a precaution I put the jumper links on a 28 pin turned header socket and plugged that into the prommer ZIF socket, with the 18F2431 in the header socket, I got a successful PIC program.

Thanks for your help.
Eric

 

hi Ernie,
Just read your post, as you see I like you took the same approach as you suggested, I used a 28 pin header with the mod links.
Eric

 

Hi John,
I bit the bullet and modified the Picstart+ as the link suggested, BUT as a precaution I put the jumper links on a 28 pin turned header socket and plugged that into the prommer ZIF socket, with the 18F2431 in the header socket, I got a successful PIC program.

Thanks for your help.
Eric

I did the same thing, and got s successful PIC progam 18F2431 with Pickit2

C.