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en:xu3_hardware_irq [2015/08/09 16:53] charles.park |
en:xu3_hardware_irq [2016/01/30 11:35] odroid [Usage] |
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| echo 26 > /sys/class/gpio/export | echo 26 > /sys/class/gpio/export | ||
| </code> | </code> | ||
| + | |||
| + | === Limitation of GPIO interrupt === | ||
| + | There are only 6 interrupts for the GPIOs. | ||
| + | If you use the falling and rising triggers together, you can use only 3 GPIOs for the interrupt. | ||
| + | If you use only the falling or rising, 6 GPIOs can be assigned for the interrupt. | ||
| === User Space Example code === | === User Space Example code === | ||
