A little more fun with UBB: ubbctl
werner at almesberger.net
Sun Jan 6 11:49:50 EST 2013
Sometimes it's useful to be able to have a quick means to check
the status of UBB signals and to reconfigure them.
Does all this. Just "ubbctl" displays the state of the signals
by decoding the register settings, e.g.,
nPWR=1 DAT2=F1 DAT3=F1 CMD=F1 CLK=Z1 DAT0=1 DAT1=0
For continuous display, use
# ubbctl -c
and exit with Ctrl-C.
Pins can also be configured with ubbctl. For example,
# ubbctl dat0=0 dat2=1 clk=z
would make DAT0 an output driven low, DAT2 an output driven
high, and CLK an input without pull-up.
The same pin can be reconfigured multiple times. E.g., to send
a positive pulse on DAT0, one could
# ubbctl dat0=1 dat0=0
Last but not least, ubbctl can control power to the 8:10
# ubbctl on
# ubbctl off
More information about the discussion