Pak VIa and keyboard help
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Posts: 46,084
Gang,
I'm using a Pak VIa to take input from a keyboard and send it to
my BS2. Here's my problem: The circuit works just fine with a
standard-size PS/2 keyboard, but it doesn't work with the compact
keyboard that I plan to use in the final configuration. The compact
keyboard works fine when hooked up to my computer, but when I hook it
up to my circuit, the Caps Lock, Num Lock, and Scr Lock LEDs light up
constantly and the keyboard locks up.
AWC recommended putting 10K pull-up resistors on the clock and/or
data lines from the keyboard, but was stumped by the LEDs being stuck
on. He also thought it may be a current-draw problem, but I am
running the keyboard off the regulator that is onboard the BoE that
the BS2 is on, so I don't think that's it. I plan on trying the
resistors, but would like to know if anyone has run into this sort of
problem and what their solution was.
Thanks,
Doug Dixon
Orlando, FL
I'm using a Pak VIa to take input from a keyboard and send it to
my BS2. Here's my problem: The circuit works just fine with a
standard-size PS/2 keyboard, but it doesn't work with the compact
keyboard that I plan to use in the final configuration. The compact
keyboard works fine when hooked up to my computer, but when I hook it
up to my circuit, the Caps Lock, Num Lock, and Scr Lock LEDs light up
constantly and the keyboard locks up.
AWC recommended putting 10K pull-up resistors on the clock and/or
data lines from the keyboard, but was stumped by the LEDs being stuck
on. He also thought it may be a current-draw problem, but I am
running the keyboard off the regulator that is onboard the BoE that
the BS2 is on, so I don't think that's it. I plan on trying the
resistors, but would like to know if anyone has run into this sort of
problem and what their solution was.
Thanks,
Doug Dixon
Orlando, FL
Comments
with using a single keyboard to control both a UNIX workstation,
and a PC workstation via an A-B switch. It might be interesting
to note to the group that a UNIX-SUN keyboard uses a standard
8N1 1200 baud to transmit and receive at +5 and 0V levels. What
this means is that the keyboard will directly interface with a
STAMP with minimal overhead.
-Beau Schwabe
>Gang,
>
> I'm using a Pak VIa to take input from a keyboard and send it to
>my BS2. Here's my problem: The circuit works just fine with a
>standard-size PS/2 keyboard, but it doesn't work with the compact
>keyboard that I plan to use in the final configuration. The compact
>keyboard works fine when hooked up to my computer, but when I hook it
>up to my circuit, the Caps Lock, Num Lock, and Scr Lock LEDs light up
>constantly and the keyboard locks up.
>
> AWC recommended putting 10K pull-up resistors on the clock and/or
>data lines from the keyboard, but was stumped by the LEDs being stuck
>on. He also thought it may be a current-draw problem, but I am
>running the keyboard off the regulator that is onboard the BoE that
>the BS2 is on, so I don't think that's it. I plan on trying the
>resistors, but would like to know if anyone has run into this sort of
>problem and what their solution was.
>
>Thanks,
>Doug Dixon
>Orlando, FL
>
>
>
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