What is UART interface?

[chsy0823]

What is UART interface and when I need that?
I didn't bought an USB-SERIAL-CABLE-F because I didn't know where to use.

I want to connect the board with other modules like DMB, GPS and want to communicate with them.
But I don't know anything about linux kernel , but know a little about C .C++ ,JAVA.
I just connected the A13 with my computer by USB mini cable and tried to $ adb shell
but It doesn't worked.

If you know any specific instructions or examples, plz let me know..
Thank you.

[JohnS]

See my other reply.  You have a lot of learning to do.  google and books...

Or a (university) course.

John

[Tele]

What is UART interface and when I need that?

In the context of Olinuxiino board, UART is a 4 pin serial connector (labelled UART1), at one of the corners of board. Not a "standard" RS232, but a very similar with 3.3V signal levels. You can connect your PC to it, with a special USB to TTL232 adapter. That is the USB-SERIAL-CABLE-F. You have to check documentation about the correct pin assignments, and connection.

After you connected it, you have to start a terminal application on your PC, like PUTTY or similar, and you can see the kernel booting messages, and then you can log on linux in terminal mode.
You have to take a linux curse, read a linux book (Linux Bible.pdf for example) or something, if you wanna understand and program your Olinuxino.

[vinifr]

If your board is A13-Olinuxino-WIFI UART1 is this: http://dl.dropbox.com/u/22273442/A13/UEXT_UART1.jpg (UEXT connector), schematic: http://dl.dropbox.com/u/22273442/A13/uart1.png

In the micro UART1 also is in UEXT.

For general stuff sunxi look: http://linux-sunxi.org/Main_Page