UM0844 datasheet(14/43 Pages) STMICROELECTRONICS

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The pre-flashed software

UM0844

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Doc ID 16544 Rev 3

Now you can physically unplug the pendrive

2.5

Using a MMC/SD Card

Some evaluation boards (currently EVALSPEAR300 and EVALSPEAR320PLC) provide a

MMC/SD card reader slot.

An example of operation sequence for a MMC/SD card is the following:

Plug the card into the board slot and wait for the Linux kernel to autodetect it (you can

see active kernel messages on the terminal)

Mount the card's filesystem:

# mount /dev/mmcblk0p1 /mnt

Now the card's filesystem can be accessed under the /mnt directory.

Transfer files as usual (for example, cp command)

When finished, unmount the card:

# umount /mnt

Now you can physically remove the card.

2.6

Entering the U-Boot resident monitor

The U-Boot resident monitor offers an interactive command-line interface that can be used

through the serial console. U-Boot is executed before starting the Linux OS. In order to

interrupt the normal boot process and enter U-Boot operation mode, press a key from the

virtual terminal on the Windows or Linux PC during the initial period (after hardware reset)

when the following message is displayed:

Hit SPACE to stop autoboot: _

To obtain a full list of U-Boot commands available on SPEAr board, enter the "help"

command or simply type the "?" character. When "help" is followed by a command name, a

description of that specific command is displayed.

The following subsections describe basic usage scenarios. Please note that command

results are only shown as examples and can look slightly different depending on the

evaluation board and software version you use.

Detailed documentation about the described commands, as well as additional ones, may be

found on the main U-Boot Web site: http://www.denx.de/wiki/U-Boot

2.6.1

Information commands

To report the U-Boot version currently available on the evaluation board Flash memory,

execute the "version" command:

> version

U-Boot 1.3.1 (Oct

1 2009 - 14:52:19)-SPEAr300-LSP2.1

To list all Flash memory partitions, use the "imls" command:

> imls

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NOR Flash Images

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