UM1535 datasheet(14/39 Pages) STMICROELECTRONICS

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Working with pre-flashed software

UM1535

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Doc ID 023036 Rev 2

> version u-boot

> version U-Boot 2010.03-lsp-3.2.5 (Feb 22 2012 - 11:31:43)-SPEAr

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

u-boot> imls

Legacy Image at E6000000:

Image Name:

Xloader 2010.06-lsp-3.2.5 for sp

Image Type:

ARM Linux Firmware (uncompressed)

Data Size:

27384 Bytes = 26.7 KiB

Load Address: b3801504

Entry Point:

b3801504

Verifying Checksum ... OK

Legacy Image at E6010000:

Image Name:

U-Boot 2010.03-lsp-3.2.5 for spe

Image Type:

ARM Linux Firmware (uncompressed)

Data Size:

196264 Bytes = 191.7 KiB

Load Address: 00700000

Entry Point:

00000000

Verifying Checksum ... OK

Legacy Image at E6050000:

Image Name:

Linux-2.6.37-lsp-3.2.5-spear13xx

Image Type:

ARM Linux Kernel Image (uncompressed)

Data Size:

2579968 Bytes = 2.5 MiB

Load Address: 00008000

Entry Point:

00008000

Verifying Checksum ... OK

2.7.2

Environment variables

A specific subgroup of U-Boot commands very often invoked by end users is related to the

management of environment variables. Such variables are string-type fields that may be

read and written, as well as stored on Flash to guarantee their persistence across system

reboots. Some of these variables have a predefined purpose, but users may also add their

own custom variables. It is important to know that a current environment maintained in DDR

RAM memory can be sometimes different from the persistent environment stored on Flash.

To create a new variable or change the value of an existing one, run the setenv command:

> setenv MYVAR=MYVALUE

To edit existing variables, use the edit command:

> edit MYVAR

> edit: MYVALUE

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