We are glad to announce that we released A20-OLinuXino-TOOLS app for Android.
A20-TOOLS allow you to test UART, I2C, GPIOs under Android.
When launched it will initialize all these three interfaces and you will see them in three tabs:
after the initialization if you click on I2C tab you will see all available I2C interfaces:
you have to select interface you want to work with then you have three commands: SCAN, READ and WRITE.
Scan will scan for all attached I2C devices on the interface:
on the picture above you can see UEXT module with digital compass is attached to UEXT connector 2 and responds on address 0x1E
you can read the status register 0x0A on this device with Read command:
On GPIO tab you have all GPIOs as seen on connectors you can select GPIO1, GPIO2, GPIO3, GPIO4
for instance if you want to make the LED on board ON you have to make GPIO-3:7 as output and drive it high:
In UART tab first you have to get premissions:
then you can read and write to the UART like you do in any terminal program:
The A20-OLinuXino-TOOLS sources and .apk is on GitHub and are released under GPL licensee.