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Link GPIO_136 and GPIO_137 with a wire, these pins are located in J990 connector with numbers 7 and 9. Now type next code:
<pre>root@localhost:~/svn.hylands.org/linux/gpio-driver/app# ./gpio input 136root@localhost:~/svn.hylands.org/linux/gpio-driver/app# ./gpio output 137 0root@localhost:~/svn.hylands.org/linux/gpio-driver/app# ./gpio get 136
0
root@localhost:~/svn.hylands.org/linux/gpio-driver/app# ./gpio output 137 1root@localhost:~/svn.hylands.org/linux/gpio-driver/app# ./gpio get 136
1
root@localhost:~/svn.hylands.org/linux/gpio-driver/app#
</pre>
The code above shows that driver works properly, GPIO_136 is configured like input and GPIO_137 is configured like output with value 0, when read GPIO_136 the result is 0. To make sure that works well, configure GPIO_137 with value 1, now GPIO_136 reads 1. <br> This driver have more options like IRQ, but is not explained here.
<br> Other examples:[[What can I do with IGEP0020#How_to_handle_the_gpio-LED.27s]][[Category:Communications|Communications]]
