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en:c1_enhancement_gpio40 [2016/03/08 16:37] charles.park |
en:c1_enhancement_gpio40 [2016/03/29 10:23] odroid |
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The **ODROID-C2** provides 40Pin GPIOs. | The **ODROID-C2** provides 40Pin GPIOs. | ||
- | **Easy to use GPIOs** | + | **Easy to use GPIOs** \\ |
- | First, you refer to below link. | + | First, you refer to below link. \\ |
- | You check Export number that you want to use GPIO. | + | You check Export number that you want to use GPIO. \\ |
[[en:c2_hardware&#expansion_connectors | Pin description]] | [[en:c2_hardware&#expansion_connectors | Pin description]] | ||
Line 11: | Line 11: | ||
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 for input |
- | echo in > /sys/class/gpio/gpio29/direction : gpio direction input | + | echo in > /sys/class/gpio/gpio233/direction |
- | echo out > /sys/class/gpio/gpio29/direction : gpio direction output | + | Configure the pin direction for output |
+ | echo out > /sys/class/gpio/gpio233/direction | ||
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 |