From: Bo Shen <voice.shen@atmel.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] u-boot USB question
Date: Fri, 17 May 2013 09:22:26 +0800 [thread overview]
Message-ID: <51958652.7030501@atmel.com> (raw)
In-Reply-To: <E632120D9F6D2B4C992D00A695B685CD0C493CE93F@P3PW5EX1MB09.EX1.SECURESERVER.NET>
Hi Lance,
On 5/17/2013 06:32, Lance Beck wrote:
> We are using u-boot on an AT91SAM9G20 platform with NAND Flash and running Linux. Is there a means to update the kernel and root fs image by reading them from a USB memory device and writing the new images to flash? I have built the fw_printenv tool thinking I might be able to use this to somehow trigger that action.
Yes. Please take the following example (using the mainline
u-boot-2013.04) for updating related image from USB disk.
1. connect usb to board and power up
U-boot> usb start
(Re)start USB...
USB: scanning bus for devices... 2 USB Device(s) found
scanning bus for storage devices... 1 Storage Device(s) found
U-boot> fatls usb 0
...
2396352 uImage
...
U-boot> fatload usb 0 0x20000000 uImage
U-boot> nand erase 0x200000 0x600000
U-boot> nand write 0x20000000 0x200000 <uImage_size>
If all steps are successfully, then you have updated linux kernel uImage.
BTW, the fw_printenv is used with Linux file system to access u-boot
environment.
> Not sure where to go from here...
>
> Thanks,
>
> Lance
Best Regards,
Bo Shen
next prev parent reply other threads:[~2013-05-17 1:22 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-16 22:32 [U-Boot] u-boot USB question Lance Beck
2013-05-17 1:22 ` Bo Shen [this message]
2013-05-17 2:20 ` Lance Beck
2013-05-17 3:04 ` Bo Shen
2013-05-17 3:39 ` Michael Trimarchi
2013-05-17 5:54 ` Andreas Bießmann
2013-05-17 5:45 ` Andreas Bießmann
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