[FE training-materials-updates] Kernel labs: stop using the external MMC

Michael Opdenacker michael.opdenacker at free-electrons.com
Fri Nov 29 05:33:07 CET 2013

Repository : git://git.free-electrons.com/training-materials.git

On branch  : master
Link       : http://git.free-electrons.com/training-materials/commit/?id=e62a497f042ee8ff3ceb7e2268da769846370177


commit e62a497f042ee8ff3ceb7e2268da769846370177
Author: Michael Opdenacker <michael.opdenacker at free-electrons.com>
Date:   Fri Nov 29 05:27:13 2013 +0100

    Kernel labs: stop using the external MMC
    - This assumes that the boards have a working eMMC
      (a procedure to ensure this will be documented)
    Signed-off-by: Michael Opdenacker <michael.opdenacker at free-electrons.com>


 labs/kernel-board-setup/kernel-board-setup.tex     |   81 ++------------------
 .../kernel-compiling-and-nfs-booting.tex           |    5 +-
 2 files changed, 8 insertions(+), 78 deletions(-)

diff --git a/labs/kernel-board-setup/kernel-board-setup.tex b/labs/kernel-board-setup/kernel-board-setup.tex
index 0fd3a2e..028091b 100644
--- a/labs/kernel-board-setup/kernel-board-setup.tex
+++ b/labs/kernel-board-setup/kernel-board-setup.tex
@@ -42,7 +42,6 @@ of the 48 pins headers. Using your special USB to Serial adaptor provided
 by your instructor, connect the ground wire (blue) to the pin closest
 to the power supply connector (let's call it pin 1), and the \code{TX} (red)
 and \code{RX} (green) wires to the pins 4 (\code{RX}) and 5 (\code{TX}).
 for details about the USB to Serial adaptor that we are using.} 
@@ -89,80 +88,12 @@ It is now time to power up your board by plugging in the mini-USB
 cable supplied by your instructor (with your PC or a USB power supply at the
 other end of the cable).
-See what messages you get on the serial line.
-\section{Prepare a bootable micro-SD card}
-Using a micro-SD card is a convenient way to control the way
-the board boots, whatever the initial contents of the on-board MMC
-A micro-SD card also makes it easy to modify its contents by connecting
-it to your workstation.
-In order to boot from a micro-SD card, the CPU romcode needs the card
-to be partitioned and formatted in a particular way.
-Connect the micro-SD card provided by your instructor to your
-\item Either using a direct SD slot if available.
-      In this case, the card should be seen as \code{/dev/mmcblk0} by
-      your computer (check the \code{dmesg} command).
-\item Either using a card reader provided by your instructor too.
-      In this case, the card should be seen as \code{/dev/sdb}, or
-      \code{/dev/sdc}, etc.
-Now, run the \code{mount} command to check for mounted SD card
-partitions. Umount them with command such as \code{sudo umount
-/dev/mmcblk0p1} or \code{sudo umount /dev/sdb1}, depending on how
-the system sees the media card device.
-Now type the below command to partition the micro-SD card
-(we assume that the card is seen as \code{/dev/mmcblk0}):
-sudo sfdisk --in-order --Linux --unit M /dev/mmcblk0 << EOF
-Now, let's format the first partition in FAT format:
-sudo mkfs.vfat -F 16 /dev/mmcblk0p1 -n boot
-Remove the card and insert it again. It should automatically be mounted
-on \code{/media/boot} \footnote{Or on \code{/media/<user>/boot} if you
-are using Ubuntu 12.10 or later.}.
-Now, copy the first stage bootloader (\code{MLO}: {\em Mmc LOad}) and the main
-bootloader (\code{u-boot.cmd}) to your micro-SD card:
-cd $HOME/felabs/linux/bootloader
-cp beaglebone-black/MLO /media/boot/
-cp beaglebone-black/u-boot.img /media/boot
-sudo umount /media/boot
-\section{Boot the board}
-Force the board to boot on the external card. To do this, you will
-have to remove the power supply, press and hold the \code{boot switch}
-button, insert the power supply, and then release this button.
-Note that from now on, the board will always boot on the external 
-MMC, until you remove the power. You only have do this manipulation
-when you power on the board for the first time.
+See what messages you get on the serial line. You should see Linux boot
+on the serial line.
-You should then see U-boot 2013.10-rc3 start.
+\section{Bootloader interaction}
-Press a key in the \code{picocom} terminal to stop the U-boot
+Reset your board. Press a key in the \code{picocom} terminal to stop the U-boot
 countdown. You should then see the U-Boot prompt:
@@ -226,12 +157,12 @@ setenv ipaddr
 setenv serverip
-Save these settings to the MMC card:
+Save these settings to the eMMC storage on the board:
 \footnote{The U-boot environment settings are stored in some free space
 between the master boot record (512 bytes, containing the partition
 tables and other stuff), and the beginning of the first partition (often
 at \code{32256}). This is why you won't find any related file in the
-first partition.}
+first partition of the eMMC storage.}
diff --git a/labs/kernel-compiling-and-nfs-booting/kernel-compiling-and-nfs-booting.tex b/labs/kernel-compiling-and-nfs-booting/kernel-compiling-and-nfs-booting.tex
index 5fd8afd..df79484 100644
--- a/labs/kernel-compiling-and-nfs-booting/kernel-compiling-and-nfs-booting.tex
+++ b/labs/kernel-compiling-and-nfs-booting/kernel-compiling-and-nfs-booting.tex
@@ -210,9 +210,8 @@ saveenv
 Don't hesitate to change it according to your exact needs.
 We could also copy the \code{uImage} file to the eMMC flash and avoid
-downloading it over and over again. However, handling flash is outside
-of the scope of this course. See our
+downloading it over and over again. However, detailed bootloader
+usae is outside of the scope of this course. See our
 Linux system development course} and its on-line materials for

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