Boot from SD/MMC - Revision history

Support: /* Creating a Bootable Filesystem on microSD card using a Windows PC */

Support — Thu, 09 Feb 2012 21:15:32 GMT

Creating a Bootable Filesystem on microSD card using a Windows PC

← Older revision		Revision as of 21:15, 9 February 2012
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	1) Download the [http://www.micromint.com/updates/electrum/win32diskimager-binary.zip win32diskimager-binary.zip] file.		1) Download the [http://www.micromint.com/updates/electrum/win32diskimager-binary.zip win32diskimager-binary.zip] file.

-	2) Download the [http://www.micromint.com/updates/electrum/~~win32diskimager-binary~~.zip latest Linux and file system image file].	+	2) Download the [http://www.micromint.com/updates/electrum/SD_Card_Linux_Kernel_File_System_Image.zip latest Linux and file system image file].

	3) Unzip the files into a single directory.		3) Unzip the files into a single directory.

Support: /* Creating a Bootable Filesystem on microSD card using a Windows PC */

Support — Thu, 09 Feb 2012 21:10:33 GMT

Creating a Bootable Filesystem on microSD card using a Windows PC

← Older revision		Revision as of 21:10, 9 February 2012
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	5) Open the Win32DiskImager application.		5) Open the Win32DiskImager application.

-	6) ~~When asked click~~ run.	+	6) If Windows asks allow the Win32DiskImager application to run.

-	7) Browse for the desired image file in the directory where	+	7) Browse for the desired image file in the directory where it was unzipped.
		+
		+	8) Make sure the correct drive is selected.
		+
		+	9) Click on the "Write" button.

	==Booting from the microSD Card==		==Booting from the microSD Card==

Support at 21:03, 9 February 2012

Support — Thu, 09 Feb 2012 21:03:37 GMT

← Older revision		Revision as of 21:03, 9 February 2012
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	Your microSD card now has a bootable system. The next step is to change the bootloader configuration to boot from it instead of NAND.		Your microSD card now has a bootable system. The next step is to change the bootloader configuration to boot from it instead of NAND.
		+
		+	==Creating a Bootable Filesystem on microSD card using a Windows PC==
		+	1) Download the [http://www.micromint.com/updates/electrum/win32diskimager-binary.zip win32diskimager-binary.zip] file.
		+
		+	2) Download the [http://www.micromint.com/updates/electrum/win32diskimager-binary.zip latest Linux and file system image file].
		+
		+	3) Unzip the files into a single directory.
		+
		+	4) Insert the microSD card into a USB to SD card adapter. Note: win32diskimager does not function well with card readers built into PCs.
		+
		+	5) Open the Win32DiskImager application.
		+
		+	6) When asked click run.
		+
		+	7) Browse for the desired image file in the directory where

	==Booting from the microSD Card==		==Booting from the microSD Card==

Support: /* Creating a Bootable Filesystem on microSD card */

Support — Thu, 09 Feb 2012 20:25:21 GMT

Creating a Bootable Filesystem on microSD card

← Older revision		Revision as of 20:25, 9 February 2012
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	Note: The EXT2 filesystem does not implement journaling. Proper shutdown procedures should be followed.		Note: The EXT2 filesystem does not implement journaling. Proper shutdown procedures should be followed.

-	==Creating a Bootable Filesystem on microSD card==	+	==Creating a Bootable Filesystem on microSD card using a Linux PC==
	1) Partition the microSD card and create a filesystem on the first partition. Generally this is done on a Linux PC. Insert the microSD card and enter the following commands:		1) Partition the microSD card and create a filesystem on the first partition. Generally this is done on a Linux PC. Insert the microSD card and enter the following commands:

Support at 20:39, 7 February 2012

Support — Tue, 07 Feb 2012 20:39:55 GMT

← Older revision		Revision as of 20:39, 7 February 2012
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	__TOC__		__TOC__
	=Boot from SD/MMC=		=Boot from SD/MMC=
-	This procedure explains how to boot a kernel image and root filesystem from a microSD card. Booting from a microSD card gives applications a wide range of options including portability, multiple distributions, larger storage space, etc. The microSD card has lower disk I/O performance than NAND, but ~~for most applications~~ the difference is not significant ~~since~~ most ~~critical~~ operations ~~occur~~ in RAM. A NAND is not required when booting from a microSD card if the kernel is included with the root filesystem.	+	This procedure explains how to boot a kernel image and root filesystem from a microSD card. Booting from a microSD card gives applications a wide range of options including portability, multiple distributions, larger storage space, etc. The microSD card has lower disk I/O performance than NAND, but the difference is not significant for embedded applications that perform most operations in RAM. A NAND is not required when booting from a microSD card if the kernel is included with the root filesystem.

	Note: The EXT2 filesystem does not implement journaling. Proper shutdown procedures should be followed.		Note: The EXT2 filesystem does not implement journaling. Proper shutdown procedures should be followed.

Support: /* Booting from the microSD Card */

Support — Tue, 07 Feb 2012 17:35:28 GMT

Booting from the microSD Card

← Older revision		Revision as of 17:35, 7 February 2012
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	When the U-Boot messages appear on the console, stop the automatic boot by pressing SPACE twice.		When the U-Boot messages appear on the console, stop the automatic boot by pressing SPACE twice.

-	2) ~~Check~~ the card is accessible using the rescan command.	+	2) Insert the microSD card and confirm it is accessible using the rescan command.

	Electrum> mmc rescan 0		Electrum> mmc rescan 0

Support: /* Booting from the microSD Card */

Support — Tue, 07 Feb 2012 17:34:42 GMT

Booting from the microSD Card

← Older revision		Revision as of 17:34, 7 February 2012
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	# shutdown -r now		# shutdown -r now
-	When the U-Boot messages appear, stop the automatic boot by pressing SPACE ~~a few times~~.	+	When the U-Boot messages appear on the console, stop the automatic boot by pressing SPACE twice.

	2) Check the card is accessible using the rescan command.		2) Check the card is accessible using the rescan command.

Support: /* Boot from SD/MMC */

Support — Tue, 07 Feb 2012 17:33:56 GMT

Boot from SD/MMC

← Older revision		Revision as of 17:33, 7 February 2012
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	__TOC__		__TOC__
	=Boot from SD/MMC=		=Boot from SD/MMC=
-	This procedure explains how to boot a kernel image and root filesystem from a microSD card. Booting from a microSD card gives applications a wide range of options including portability, multiple distributions, larger storage space, etc. The microSD card has lower disk I/O performance than NAND, but for most applications the difference is not be significant since most critical operations occur in RAM. A NAND is not required when booting from a microSD card if the kernel is included with the root filesystem.	+	This procedure explains how to boot a kernel image and root filesystem from a microSD card. Booting from a microSD card gives applications a wide range of options including portability, multiple distributions, larger storage space, etc. The microSD card has lower disk I/O performance than NAND, but for most applications the difference is not significant since most critical operations occur in RAM. A NAND is not required when booting from a microSD card if the kernel is included with the root filesystem.

	Note: The EXT2 filesystem does not implement journaling. Proper shutdown procedures should be followed.		Note: The EXT2 filesystem does not implement journaling. Proper shutdown procedures should be followed.

Support: /* Booting from the microSD Card */

Support — Tue, 07 Feb 2012 17:33:26 GMT

Booting from the microSD Card

← Older revision		Revision as of 17:33, 7 February 2012
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	When the U-Boot messages appear, stop the automatic boot by pressing SPACE a few times.		When the U-Boot messages appear, stop the automatic boot by pressing SPACE a few times.

-	2) Check the card using the rescan command.	+	2) Check the card is accessible using the rescan command.

	Electrum> mmc rescan 0		Electrum> mmc rescan 0

Support: /* Creating a Bootable Filesystem on microSD card */

Support — Tue, 07 Feb 2012 17:32:27 GMT

Creating a Bootable Filesystem on microSD card

← Older revision		Revision as of 17:32, 7 February 2012
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	$ mount /dev/mmcblk0p1 /mnt/sdcard		$ mount /dev/mmcblk0p1 /mnt/sdcard

-	2) Copy the desired root filesystem to the microSD card. The filesystem should contain a kernel (e.g. uImage-2.6.33.20-1-at91) in the top directory and the corresponding modules directory in /lib/modules. The command below assumes the root filesystem in the /home/electrum/rootfs/ directory of your Linux PC. This may take ~~a few~~ minutes depending on the filesystem contents and the speed (class) of your card.	+	2) Copy the desired root filesystem to the microSD card. The filesystem should contain a kernel (e.g. uImage-2.6.33.20-1-at91) in the top directory and the corresponding modules directory in /lib/modules. The command below assumes the root filesystem is in the /home/electrum/rootfs/ directory of your Linux PC. On most Linux distributions you need to be running as root to copy device (/dev) nodes. This copy may take several minutes depending on the filesystem contents and the speed (class) of your card.

	# cp -pr /home/electrum/rootfs/* /mnt/sdcard		# cp -pr /home/electrum/rootfs/* /mnt/sdcard

-	3) The microSD card should now ~~mirror~~ your ~~internal nand flash, which you can confirm~~ with df ~~-h, etc~~.	+	3) The microSD card should now contain your root filesystem. Confirm the disk usage with the df command prior to unmounting.

	$ df		$ df
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	...		...
	/dev/mmcblk0p1 7707056 516216 6799340 8% /mnt/sdcard		/dev/mmcblk0p1 7707056 516216 6799340 8% /mnt/sdcard
		+	$ umount /mnt/sdcard

	Your microSD card now has a bootable system. The next step is to change the bootloader configuration to boot from it instead of NAND.		Your microSD card now has a bootable system. The next step is to change the bootloader configuration to boot from it instead of NAND.