Translations:Управление низковольтной нагрузкой/13/en: различия между версиями
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Версия 17:43, 16 мая 2019
- Find the GPIO number corresponding to the desired terminal in the tableWB2.8/WB3.5/WB4/WB5. For terminal strip number 2 in version 2.8, it is GPIO 32.
- Export GPIO to sysfs
root@wirenboard:~# echo 32 > /sys/class/gpio/export
- Set the GPIO to output mode to control the transistor. This is required because GPIO can be in input mode and have a high impedance, leaving the transistor in an undefined state.
root@wirenboard:~# echo out > /sys/class/gpio/gpio32/direction
- Open the transistor, giving a logical high level to the gate:
root@wirenboard:~# echo 1 > /sys/class/gpio/gpio32/value
- Close the transistor, giving a logical zero to the gate:
root@wirenboard:~# echo 0 > /sys/class/gpio/gpio32/value