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+\subsection{Machines}
+\begin{frame}[fragile]
+\frametitle{machine configs aka BSP}
+to get a list of currently available machine configs:
+\begin{lstlisting}
+$ cd ~/poky
+$ ls meta*/conf/machine/*.conf
+\end{lstlisting}
+If no machine fits your needs, search at 'http://layers.openembedded.org' or
+define your own!
+\end{frame}
+
+\begin{frame}[fragile]
+\frametitle{Create a vexpress machine config}
+\begin{lstlisting}
+$ cd ~/poky/meta-schulung
+$ mkdir conf/machine
+$ pluma conf/machine/vexpress.conf
+\end{lstlisting}
+\begin{verbatim}
+DEFAULTTUNE ?= "armv7athf-neon"
+require conf/machine/include/tune-cortexa8.inc
+SERIAL_CONSOLE = "115200 ttyAMA0"
+\end{verbatim}
+\end{frame}
+
+
+\begin{frame}[fragile]
+\frametitle{Use the vexpress BSP in the build}
+\begin{lstlisting}
+$ cd ~/poky/build-schulung
+$ pluma conf/local.conf
+\end{lstlisting}
+\begin{verbatim}
+#STATE_DIR ?= "/home/prebuilt/vexpress/sstate-cache"
+#BB_NO_NETWORK = "1"
+MACHINE ??= "vexpress"
+DL_DIR ?= "/home/downloads"
+DISTRO ?= "schulung"
+PACKAGE_CLASSES ?= "package_ipk"
+EXTRA_IMAGE_FEATURES ?= "debug-tweaks"
+USER_CLASSES ?= "buildstats image-mklibs image-prelink"
+PATCHRESOLVE = "noop"
+CONF_VERSION = "1"
+\end{verbatim}
+\begin{lstlisting}
+$ bitbake core-image-minimal
+\end{lstlisting}
+\end{frame}