CMG-DCM
character,
\n
= newline,
\r
= carriage return,
\a
= bell, etc.) You can use
\r
to issue several commands to the digitizer in one session, since the carriage
return will cause the digitizer to act on the previous command.
Passing the
-r
option causes the digitizer to reboot automatically once the
command is completed. This is useful if you are using
gcli
to change the
configuration of the digitizer, since many options require a restart for any
changes to take effect.
If you need an interactive session with the digitizer, you can use the Linux
terminal program
minicom
, which has been configured specially to cooperate
with the DCM's various serial services. You can open a session with a digitizer
by issuing the command
minicom -n
port-number
If the port you specify is set to gcf_in, the DCM will automatically interrupt the
data flow from the digitizer to allow you to enter commands.
When you have finished your session, press
CTRL-a
then
q
.
minicom
will
ask you if you want to quit without resetting the connection. Choose
yes
to
return the digitizer to data mode.
6.4 Monitoring
Data flow
You can check that the DCM is receiving data either by monitoring the
Summary page of the on-board Web interface (see
Section 5.7, “Summary”
), or
from a command prompt using the command
gnblocks
:
Key 0x007000: Blocks 0 (Port 0, name Data out port,
device /dev/ttySA0, baud 115200)
Key 0x007001: Blocks 0 (Port 1, name Port B, device
/dev/ttySA1, baud 9600)
Key 0x007002: Blocks 149 (Port 2, name Port A, device
/dev/ttySA2, baud 38400)
This command shows, for each port:
•
the Key number (in hexadecimal) of the process on that port which deals
with incoming blocks,
•
the number of blocks received by that process,
•
the internal port number of the port,
•
the name you have assigned to it,
88
Issue A
