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Re: Cirque Keyboard

From: Doug Sutherland <>
Date: Fri, 01 Mar 2002 23:55:10 -0600

Chuck,

> How did you make the cable, reliably?

I didn't make it reliable yet. I soldered right onto
the contacts, just for testing and development. Will
probably break the plastic case off the adapter and
solder onto the PCB inside.

> Below is a snippet from my logfile.
> 53.187: UART: Transmitted data:
> 53.187:  D5

Thanks. Pose is not very intuitive. It doesn't write
the log file till you exit the emulator session. I'm
seeing three "08" and then five "D5" being sent. I
am also seeing a bunch of port params. I see some
different baud rates, but the section where data is
sent appears to be 2400 baud.

1.844:  dcb.DCBlength   = 28
1.844:  dcb.BaudRate   = 2400
1.844:  dcb.fBinary    = 1
1.844:  dcb.fParity    = 1
1.844:  dcb.fOutxCtsFlow  = 0
1.844:  dcb.fOutxDsrFlow  = 0
1.844:  dcb.fDtrControl   = 0

These got me wondering ...

1.844:  dcb.fRtsControl   = 2
1.844:  dcb.XonLim    = 65535
1.844:  dcb.XoffLim    = 65535
1.844:  dcb.ByteSize   = 8
1.844:  dcb.Parity    = 0
1.844:  dcb.StopBits   = 0
1.844:  dcb.XonChar    = 17
1.844:  dcb.XoffChar   = 19

Because I saw more than just RX and TX in the log,
I wired up the handshake lines (DTR, RTS, and CTS).
The emulator still didn't handshake with the
keyboard. So I switched the wires around on the
adapter pins, in case I had them backwards, still
no luck. I ran my Java program at diferent baud
rates, etc, still no luck. This is getting a bit
frustrating, but that's nothing new when dealing
with pinouts and such.

I'm starting to wonder if the coin bell batteries
are dead. My voltmeter batteries are dead so I
can't test them right now. Tomorrow. This might
not be as easy as I thought. If the driver uses
the handshake lines it may be more tricky. Wish
I had a real palm to try it with. The emulator
seems pretty flaky.

  -- Doug

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