Changes between Version 12 and Version 13 of serial


Ignore:
Timestamp:
12/13/2018 04:16:25 PM (10 months ago)
Author:
Tim Harvey
Comment:

point to silenceconsole page to avoid duplicate info about serial console

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  • serial

    v12 v13  
    105105
    106106[=#console]
    107 == Linux serial Console ==
     107== serial Console ==
    108108There are times when one may not care about serial Linux console because the serial port is desired for other uses.
    109109
    110 By default the Gateworks bootloader's configure one of the board's UARTs for serial console. This can be disabled by changing the bootargs in the bootloader:
    111  * Example: Laguna uboot
    112 {{{
    113 setenv bootargs console= root=/dev/mtdblock3 rootfstype=squashfs,jffs2 noinitrd
    114 saveenv
    115 }}}
    116  * Example: Ventana uboot:
    117 {{{
    118 setenv console null
    119 saveenv
    120 }}}
    121 
    122 If using Yocto or a more traditional Linux based OS, you may need to take additional steps to disable the OS enabling the serial port for a Login terminal by removing the line with that serial port from {{{ /etc/inittab }}}.
    123 
    124 The bootloader will still output data upon power up - see below.
    125 
    126 
    127 [=#bootloader]
    128 == Bootloader Serial Console ==
    129 If you wish to disable the bootloader's use of the serial port, you will need to recompile the bootloader.
    130 
    131 Notes:
    132  * For Lagunu u-boot-2008.10 modify CONFIG_CONS_INDEX in include/configs/cavium_cns3000*.h setting it to a non-existent port.
    133  * Define CONFIG_SILENT_CONSOLE to enable support for silent mode (must custom compile bootloader as discussed on the wiki [wiki:laguna/bootloader here])
    134  * Set the u-boot envvar silent to disable some u-boot output
    135  * One should probably tweak the bootdelay to 1 second (or turn it off)
    136  * One can still interrupt u-boot by pressing the specified key (you won't see output, but your input will be processed)
    137 
     110See [wiki:silenceconsole silenceconsole] for details on silencing or changing the serial console for boot firmware, Linux kernel, and OS.
    138111
    139112