allegra42 / android-srf02

Connecting a proximity sensor to Android

Adding the SRF02 proximity sensor to Android

In this project, I add a proximity sensor to Android 4.4.4 running on a Pandaboard ES. To do so I had to write a kernel module and write parts of a HAL library. This project was developed during an internship at inovex GmbH. It should be considered work in progress with several ugly details that I know have to be fixed. And they will be in the future -- probably. Only those files I really had to change have been uploaded here.

The project is based on Linaro Android 14.10. U-boot has been replaced by a newer version to get it running on both Pandaboard ES Rev. B2 and B3. The sensor I used was a SRF02 connected via the I2C interface.

What I've done, I described at

• Part 1 : https://blog.inovex.de/android-sensor-integration-part-1-sensor-stack-and-kernel-module/
• Part 2 : https://blog.inovex.de/android-sensor-integration-part-2-sensor-readings/
• Part 3 : https://blog.inovex.de/android-sensor-integration-part-3-hal/
• Part 4 : https://blog.inovex.de/android-sensor-integration-part-4-the-android-sensor-framework/

Download the Linaro 14.10 Android sources

export MANIFEST_REPO=git://android.git.linaro.org/platform/manifest.git
export MANIFEST_BRANCH=linaro-android-14.10-release
export MANIFEST_FILENAME=panda-linaro.xml

repo init -u ${MANIFEST_REPO} -b ${MANIFEST_BRANCH} -m ${MANIFEST_FILENAME} --repo-url=git://android.git.linaro.org/tools/repo -g common,pandaboard

// Change broken linaro manifest
rm .repo/manifest.xml
cp fixed_manifest.xml .repo/manifest.xml

repo sync

Build

source build/envsetup.sh
lunch pandaboard-eng
export WITH_HOST_DALVIK=false
make -j4 boottarball systemtarball userdatatarball