[bootlin/training-materials updates] master: Bootloader lab: add details about NAND ECC (3eb87566)

[Michael Opdenacker]

Repository : https://github.com/bootlin/training-materials
On branch  : master
Link       : https://github.com/bootlin/training-materials/commit/3eb8756644a3999454325b1c125d867fc8a5b538

>---------------------------------------------------------------

commit 3eb8756644a3999454325b1c125d867fc8a5b538
Author: Michael Opdenacker <michael.opdenacker at bootlin.com>
Date:   Mon Oct 14 17:43:13 2019 +0200

    Bootloader lab: add details about NAND ECC
    
    Signed-off-by: Michael Opdenacker <michael.opdenacker at bootlin.com>


>---------------------------------------------------------------

3eb8756644a3999454325b1c125d867fc8a5b538
 labs/sysdev-u-boot/sysdev-u-boot.tex | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/labs/sysdev-u-boot/sysdev-u-boot.tex b/labs/sysdev-u-boot/sysdev-u-boot.tex
index 57b09cff..6aef65a5 100644
--- a/labs/sysdev-u-boot/sysdev-u-boot.tex
+++ b/labs/sysdev-u-boot/sysdev-u-boot.tex
@@ -185,7 +185,12 @@ You need to:
       and hit \code{Execute}
 \item Select \code{Erase All}, and execute the command
 \item Then, select and execute \code{Enable OS PMECC parameters}
-  in order to change the NAND ECC parameters to what RomBOOT expects.
+  in order to change the NAND ECC
+\footnote{{\em ECC} means {\em Error
+Correcting Code}. If we don't have the same ECC scheme as the one
+RomBOOT expects, RomBOOT will think that the NAND contents are
+corrupted.}
+parameters to what RomBOOT expects.
 \item Finally, send the image we just compiled using the command
   \code{Send Boot File}
 \end{itemize}