Olimex: Sample Project A10S Android GPIOs for A10S-OLinuXino-MICRO SBC

atomar — Fri, 08 Oct 2021 07:41:24 GMT

Current Revision posted to Documents by atomar on 10/8/2021 7:41:24 AM

A10S GPIO under Android (Click Here to Download)

*) GPIO using ADB

1. Boot android (from NAND or SDcard)

2. Connect USB-to-Serial cable on UART1

3. Open terminal at speed 115200

4. When loading is ready in the terminal type "sh" and enter

5. "ls /sys/class/gpio_sw" will give you a list of all accessable GPIOs.

The GPIOs name is according to the chip ports. For example PE3 is LED1.

6. To set PE3 as output:

#echo 1 > /sys/class/gpio_sw/PE3/mul_sel

or as input

#echo 0 > /sys/class/gpio_sw/PE3/mul_sel

7. To turn on LED:

#echo 1 > /sys/class/gpio_sw/PE3/data

and to turn off:

#echo 0 > /sys/class/gpio_sw/PE3/data

8. If GPIO is as input to read state:

#cat /sys/class/gpio_sw/PE3/data

*) GPIO using Android SDK

Basicly you should read and write to the filesys. Make sure that your app is running as root, or else nothing will happen. The demo program toggle LED1 on every button press. All read/write methods are realized in GPIO.java file.

Attachments:

community.element14.com/.../ToogleLED.zip

Tags: olinuxino, a10s, cortex_a8, a10s-olinuxino-micro, arm, olimex