-----Original Message-----
From: David Shoemaker [mailto:davids@oz.net]
Sent: 03 June 2003 09:20
To: techtoolslist@flippers.com
Subject: 9100 keyboard wedge (udpate 2)

Well today was an educational and busy day with the atmel website.

 

It was also close but not quite a living hell with WinDraft.

 

I have posted a bmp with my current schematic plans based on the AT90S2323 part.  The only draw back to this part is that it does not have a built in UART. So one will have to be written in software, anyone with a good AVR background want to tackle that?  I am sure I can do it, but it might take me a while.

 

If I can't come up with a software UART solution I can change over to the 2313 part which has a built in UART.  Of course the part is also 20 pin instead of the tiny 8 pin 2323 with lots of left over pins wasted.

 

 

I will be basing the software off of one of the atmel application notes: AVR313. That note is for the 8515 part (a 40 pin part) but I think I can adapt it well enough (once again assuming a software UART can be written).

 

Looking for feedback.

 

The bmp (and my schematic file and a start of an atmel part library) are at: http://www.thewellworld.net/fluke/wedge

 

If anyone has more experienced with WinDraft and wants to clean up the schematic I wouldn't mind a bit :)  Or if you know how to edit a part in a library after you have closed the dang library file.

 

David