Booting the SABRE-SD Board

[patcharasirigul]

Hello everyone,

     Now, I try to follow the Android_Quick_Start_Guide document. In topic 3.4 Booting, I don't understand about U-boot >. What is a U-boot > ? Where can I put the command such as

U-Boot > setenv bootcmd booti mmc2

U-Boot > setenv bootargs console=ttymxc3,115200 init=/init video=mxcfb0:dev=ldb,bpp=32

video=mxcfb1:off video=mxcfb2:off fbmem=10M vmalloc=400M androidboot.console=ttymxc3

androidboot.hardware=freescale

U-Boot > saveenv

Thank you.

[Yuri]

  "After downloading the images, you can boot the board by connecting

it to the power supply". U-boot is Android / Linux bootloader, so You should

see "U-boot>"  prompt on terminal, connected via debug  UART.

  On the SDP board debug UART is implemented via UART-USB converter,

so, please install FDTI driver for it and use Teraterm program.

Have a great day,
Yuri

-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------

[jaymind]

Hello Patchara,

May below link helpful to you...

Presentation < U-Bootdoc < DENX

U-boot is the primary boot loader, by the use of it we set/change/configuration of the board related things (i.e. display device, Ethernet things, console related, kernel image, RFS, memory related, boards I/O related etc.) as Saurabh said .. :smileyhappy:

Please go through the above link.

U can set any command by use of

'setenv command'

and save it by use

'saveenv'

command in u-boot called as its arguments/parameters.

may these information helps you.

Regards

Jaymin D

[saurabh206 · Accepted solution]

Hi,

u-boot is universal Bootloader code.

u-boot> is a u-boot prompt and used  to pass configuration specific parameter.

You can configure display device, memory. console port and so on.

Thanks

Saurabh