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How to use GPIOs

391 bytes added, 15:13, 9 January 2012

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= Install binaries via IGEP<br> =

~~Install binaries via~~ Log with root userto install binaries.

=== Install module ===

Check that user-gpio-drv.ko is currently loaded with the following command:

<pre>lsmod</pre>

The result will be similar than this:

<pre>

root@localhost:~/svn.hylands.org/linux/gpio/module# lsmod

Module Size Used by

user_gpio_drv 1639 0

omap_wdt 3411 0

spidev 4198 0

iommu 8558 0

rtc_twl 4411 0

rtc_core 11187 1 rtc_twl

twl4030_keypad 2970 0

</pre>

The module is loaded until system halt.

<pre> ldd gpio

</pre>

See if libgpio.so is found it. If you execute program in bash without linking library dependencies, bash give you a error message.

= Testing driver =

4,199

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