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Unhooking the console from "dev/tty/S0"

Javier Hernandez
Intellectual 590 points

hey guys,

 

I have a project where I use the console port to communicate with other devices through RS232. Is there a way of unhooking the console after bootup within my program so I can use that port for my communication?

 

Regards,

Javier

  • 0
    TI__Expert 4685 points

    Do you need to use com port while booting up? If not, you can change the bootrags so that com port can be kept free. So, after booting up you don't have any qualms in using RS232 for using for communication.

  • 0 in reply to Nagabhushana
    Intellectual 590 points

    Good Idea, but it didn't work. It seems like everything got re-routed somewhere else, I changed the bootargs as follow:

    setenv bootargs 'mem=60M console=ttyUSB0,115200n8 rw noinitrd root=/dev/nfs nfsroot=10.10.4.48:/home/jhernandez/EUCDK/eucdk_ov_15/target/filesys,nolock'.

    I've check the loaded drivers and  this is what I got:

    # cat /proc/tty/drivers
    /dev/tty             /dev/tty        5       0 system:/dev/tty
    /dev/console         /dev/console    5       1 system:console
    /dev/ptmx            /dev/ptmx       5       2 system
    /dev/vc/0            /dev/vc/0       4       0 system:vtmaster
    serial               /dev/ttyS       4 64-65 serial
    pty_slave            /dev/pts      136 0-1048575 pty:slave
    pty_master           /dev/ptm      128 0-1048575 pty:master
    unknown              /dev/tty        4 1-63 console

    so I open the /dev/ttyS and I get an error, the only one I can open is /dev/tty which is the console. Any other ideas?