Sascha Hauer wrote:
This adds applets for manipulating gpios under Linux via sysfs. It uses
the /sys/class/gpio API to set direction and value of gpios and to read
back the actual value. The applets work like the corresponding C functions
in the kernel:
gpio_set_value <gpio> <value>
gpio_get_value <gpio>
gpio_direction_output <gpio> <value>
gpio_direction_input <gpio>
<gpio> is the Linux gpio number and <value> is 0 for low and 1 for high.
gpio_get_value will report the value to stdout.
If not already exported the applets export the gpio via
/sys/class/gpio/export. After usage the gpio is unexported again,
but only if it wasn't exported before calling the applet.
What is the advantage of these applets compared to a direct echo to
/sys/class/gpio/... ?
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