[U-Boot-Users] How console redirection is done

[yasosyaso]

Actually here I want to do console redirection through USB port.

To do that first I want to know how serial console redirection is done in
the UBOOT code.
i.e., how in uboot the "serial console redirection" is implemented.

For console redirection there should be some code, somewhere in the UBoot.
I want to know how and where(in file,in which function) the console
redirection is implemented.
[I have found how the configuration is done for console redirection]

Thanks
yaso

yasosyaso wrote:
> 
> 
> 
> Joey Oravec wrote:
>> 
>> "Ori Idan" <ori at helicontech.co.il> wrote in message 
>> news:65487840707122317ve675e94x222e48968a8a730b at mail.gmail.com...
>>>I am sorry, I can not understand the question.
>>> U-boot always outputs to serial port.
>>> If you would like to change to another serial port look at the
>>> configuration file corresponding to your board under include/configs.
>> 
>> That's not exactly true. After the initial console (bootup) you can use
>> more 
>> than serial.
>> 
>> There are a few functions like drv_lcd_init in lcd.c that create a
>> device_t 
>> structure -- in my version they're all called within devices_init in 
>> common/devices.c during boot. This defines a putc, puts, getc, and tstc
>> to 
>> handle I/O character by character. Once you call device_register() it
>> will 
>> available to the system. Using the environment variables stdin, stdout,
>> and 
>> stderr you can choose which device is active, and console.c calls the 
>> appropriate function pointer. Set the variable and you can be printing on 
>> the LCD instead.
>> 
>> Of course all this can be changed with a million CONFIG_ parameters, and
>> it 
>> is a little strange if you have several consoles available and no
>> default.
>> 
>> -joey 
>> 
>> 
>> 
>> 
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> 
> 

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