Re: 9100 keyboard wedge (udpate 2)

From: Rodger Boots <rlboots_at_cedar-rapids.net>
Date: Tue Jun 03 2003 - 14:38:58 EDT

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You may want to change your crystal frequency to some handy multiple of 1200
baud. &nbsp;There's a good reason all those old com port boards used a 1.8432
MHz crystal---it divided nicely to common baud rates.<br>
<br>
<br>
David Shoemaker wrote:<br>
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  <div><font face="Arial" size="2">Well today was an educational and busy
day with the atmel website.</font></div>
 
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  <div><font face="Arial" size="2">It was also close but not quite a living
hell with WinDraft.</font></div>
 
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  <div><font face="Arial" size="2">I have posted a bmp with my current schematic
plans based on the AT90S2323 part.&nbsp; 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?&nbsp; I am sure I can
do it, but it might take me a while.</font></div>
 
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  <div><font face="Arial" size="2">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.&nbsp;
Of course the part is also 20 pin instead of the tiny 8 pin 2323 with lots
of left over pins wasted.</font></div>
 
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  <div><font face="Arial" size="2">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).</font></div>
 
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  <div><font face="Arial" size="2">Looking for feedback.</font></div>
 
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  <div><font face="Arial" size="2">The bmp (and my schematic file and a start
of an atmel part library) are at: <a
 href="http://www.thewellworld.net/fluke/wedge">http://www.thewellworld.net/fluke/wedge</a></font></div>
 
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  <div><font face="Arial" size="2">If anyone has more experienced with WinDraft
and wants to clean up the schematic I wouldn't mind a bit :)&nbsp; Or if you
know how to edit a part in a library after you have closed the dang library
 file.</font></div>
 
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  <div><font face="Arial" size="2">David</font></div>
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Received on Tue Jun 03 14:50:10 2003

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