BeagleBoard/DSP Howto

This article explains how to use the DSP with TI's deliverables.

Kernel driver

In order to use the DSP you would need TI's bridgedriver module on the kernel. For that you would need Hiroshi's patches on top of linux-omap:

git clone http://www.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6.git
cd linux-omap-2.6
wget http://4869037.web.fc2.com/tidspbridge-20080920.tgz
tar xvzf tidspbridge-20080920.tgz
git am *.patch
make omap3_beagle_defconfig

Then make menuconfig and add the following options in the menuconfig:

 CONFIG_FB_OMAP_CONSISTENT_DMA_SIZE=14
 CONFIG_MPU_BRIDGE=m

On the board use this to load the module:

modprobe bridgedriver base_img=baseimage.dof

note: baseimage.dof will be mentioned in later steps.

TI binaries

In order to get the DSP binaries for multimedia processing you need to download TI's OpenMAX IL package. Once you have extracted the tarball you'll have to run the installer TI-OMX-Sample-Firmware-0.3-Linux-x86-Install and accept the license agreement.

You would end up with a bunch of binaries in lib/dsp, copy them to your root filesystem at the same location (/lib/dsp).

OpenMAX IL

The easiest way to use the DSP capabilities is through the OpenMAX IL API, but in order to compile TI's implementation a special DSP library is required.

libdspbridge

git clone git://github.com/felipec/libdspbridge.git
cd libdspbridge
make DESTDIR=rootfs install

libomxil-ti

git clone git://github.com/felipec/libomxil-ti.git
cd libomxil-ti
make BRIDGE_CFLAGS=-I../libdspbridge/inc BRIDGE_LIBS=-L../libdspbridge/lib DESTDIR=rootfs install

gst-openmax

You would need to compile gst-openmax inside scratchbox:

git clone git://github.com/felipec/gst-openmax.git
cd gst-openmax
./configure --prefix=/usr
make DESTDIR=rootfs install