=====How to contrl GPIO=====
We make the app which can Increase the voltage.
===Push the gpio-ctrl to CB===
We use the gpio control code and library file to compilation the Executable file named gpio-ctrl. At frist you should download the gpio-ctrl:

http://ubuntuone.com/1bh2zKV0BTTIR8P4uxUISq   \\
After downloading, connect CB by USB and open Terminal, open the Directory which you download:
<code>$ adb shell
$ mount -o remount,rw /system
$ exit
$ adb push gpio-ctrl /system/bin
</code>
===Install CB-GPIO===
Download CB-GPIO-beta1.apk form here:\\
http://ubuntuone.com/2nmYhi0KhYkHbVqFjPjQ5e \\
Open Terminal,connect CB:

  adb install CB-GPIO-beta1.apk

===Use CB-GPIO===
Boot the CB, click on CB-GPIO, then you can see PD0~PD27.\\
Click on the button to toggle the corresponding pin from low to high state.