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Both sides previous revision Previous revision Next revision | Previous revision Next revision Both sides next revision | ||
en:c1_enhancement_gpio40 [2016/03/08 16:38] charles.park |
en:c1_enhancement_gpio40 [2016/03/08 16:49] odroid [Enhancement of 40pin GPIO] |
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Create a GPIO file access.\\ | Create a GPIO file access.\\ | ||
- | You can access GPIOs using sysfs interface. | + | You can access GPIOs using sysfs interface. This example uses pin number 18 which is connected to the GPIO233(GPIOX.BIT5). |
echo 233 > /sys/class/gpio/export | echo 233 > /sys/class/gpio/export | ||
Configure the pin direction (in/out) | Configure the pin direction (in/out) | ||
- | echo in > /sys/class/gpio/gpio29/direction : gpio direction input | + | echo in > /sys/class/gpio/gpio233/direction : gpio direction input |
- | echo out > /sys/class/gpio/gpio29/direction : gpio direction output | + | echo out > /sys/class/gpio/gpio233/direction : gpio direction output |
Read a value (if gpio direction is input) | Read a value (if gpio direction is input) | ||
cat /sys/class/gpio/gpio233/value | cat /sys/class/gpio/gpio233/value |