diff options
Diffstat (limited to 'flash-memory/flash-filesystems/pres_flashfilesystems_en.tex')
| -rw-r--r-- | flash-memory/flash-filesystems/pres_flashfilesystems_en.tex | 63 |
1 files changed, 30 insertions, 33 deletions
diff --git a/flash-memory/flash-filesystems/pres_flashfilesystems_en.tex b/flash-memory/flash-filesystems/pres_flashfilesystems_en.tex index 1f027ef..5edcf91 100644 --- a/flash-memory/flash-filesystems/pres_flashfilesystems_en.tex +++ b/flash-memory/flash-filesystems/pres_flashfilesystems_en.tex @@ -1,5 +1,3 @@ -\def\lximg{/usr/share/lx/icons/fueller.png} - \input{configpres} \subsection{Creating Flashfilesystems} @@ -7,18 +5,30 @@ \title{Creating Flashfilesystems} \maketitle -\def\lximg{none} - \begin{frame} \frametitle{Contents} \tableofcontents \end{frame} +\subsubsection{MTD} +\begin{frame}[fragile] +\frametitle{MTD Flash partitioning} +\begin{itemize} +\item Redboot partition parsing +\item Boardsupport +\item Kernelparameters: +\begin{verbatim} +mtdparts=edb7312-nor:256k(ARMboot)ro, +-(root);edb7312-nand:-(home) +\end{verbatim} +\end{itemize} +\end{frame} + \subsubsection{Emulation} \begin{frame}[fragile] \frametitle{Emulating flash devices} Exercise: -\begin{lstlisting} +\begin{verbatim} $ sudo modprobe nandsim $ cat /proc/mtd dev: size erasesize name @@ -30,23 +40,10 @@ $ dmesg [ 128.718425] OOB area size: 16 bytes [ 128.718426] sector size: 16 KiB [...] -\end{lstlisting} -\end{frame} - -\subsubsection{JFFS2} -\begin{frame}[fragile] -\frametitle{MTD Flash partitioning} -\begin{itemize} -\item Redboot partition parsing -\item Boardsupport -\item Kernelparameters: -\begin{verbatim} -mtdparts=edb7312-nor:256k(ARMboot)ro, --(root);edb7312-nand:-(home) \end{verbatim} -\end{itemize} \end{frame} +\subsubsection{JFFS2} \begin{frame} \frametitle{JFFS2} \begin{figure}[h] @@ -58,7 +55,7 @@ mtdparts=edb7312-nor:256k(ARMboot)ro, \begin{frame}[fragile] \frametitle{Using JFFS2} Exercise: -\begin{lstlisting} +\begin{verbatim} # Create JFFS2 image $ /usr/sbin/mkfs.jffs2 -e 131072 \ -d source_directory \ @@ -71,13 +68,13 @@ $ sudo nandwrite -p /dev/mtd0 jffs2.img $ sudo modprobe mtdblock # Mounting the image $ sudo mount -t jffs2 /dev/mtdblock0 /mnt -\end{lstlisting} +\end{verbatim} Clean-up: -\begin{lstlisting} +\begin{verbatim} # Unmount the image and erase flash partition $ sudo umount /mnt $ sudo flash_erase -j /dev/mtd0 0 0 -\end{lstlisting} +\end{verbatim} \end{frame} \begin{frame}[fragile] @@ -138,7 +135,7 @@ root=/dev/mtdblock0 rootfstype=jffs2 \begin{frame}[fragile] \frametitle{Using UBIFS} Exercise: -\begin{lstlisting} +\begin{verbatim} # 1) Loading module and attach UBI to MTD device $ sudo modprobe ubi $ sudo ubiattach ubiattach -m 0 @@ -157,27 +154,27 @@ UBI: data offset: 512 # 3) Creating an UBIFS image $ /usr/sbin/mkfs.ubifs -r test -m 512 -e 15872 \ -c 8450 -o ubifs.img -\end{lstlisting} +\end{verbatim} \end{frame} \begin{frame}[fragile] \frametitle{Using UBIFS} Exercise (cont.): -\begin{lstlisting} +\begin{verbatim} # 4) Creating a volume $ sudo ubimkvol /dev/ubi0 -N myvolume -s 64MiB # 5) Writing the image $ sudo ubiupdatevol /dev/ubi0_0 ubifs.img # 6) Mounting UBIFS $ sudo mount -t ubifs ubi0:myvolume /mnt/ -\end{lstlisting} +\end{verbatim} Clean-up: -\begin{lstlisting} +\begin{verbatim} # Unmounting image, detach UBI from MTD device, and erase flash partition $ sudo umount /mnt $ sudo ubidetach -m 0 $ sudo flash_erase -j /dev/mtd0 0 0 -\end{lstlisting} +\end{verbatim} \end{frame} \begin{frame}[fragile] @@ -198,7 +195,7 @@ vol_flags=autoresize \begin{frame}[fragile] \frametitle{UBI: Create flash images} Exercise: -\begin{lstlisting} +\begin{verbatim} # 1) Create the ubi image $ /usr/sbin/ubinize -o ubi.img -m 512 -s 256 -p 16384 ubinize.cfg # 2) Write the image @@ -207,14 +204,14 @@ $ sudo nandwrite /dev/mtd0 ubi.img $ sudo ubiattach -m 0 # 4) Mount UBIFS $ sudo mount -t ubifs ubi0:myvolume /mnt/ -\end{lstlisting} +\end{verbatim} Clean-up: -\begin{lstlisting} +\begin{verbatim} # Unmounting image, detach UBI from MTD device, and erase flash partition $ sudo umount /mnt $ sudo ubidetach -m 0 $ sudo flash_erase -j /dev/mtd0 0 0 -\end{lstlisting} +\end{verbatim} \end{frame} \begin{frame}[fragile] |