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Управление низковольтной нагрузкой/en: различия между версиями
Управление низковольтной нагрузкой/en (просмотреть исходный код)
Версия 17:43, 16 мая 2019
, 4 года назадНовая страница: «# Find the GPIO number corresponding to the desired terminal in the tableWB2.8/WB3.5/Wiren Board 4: Сп…»
(Новая страница: «See GPIO.») |
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| Строка 33: | Строка 33: | ||
See [[GPIO/en|GPIO]]. | See [[GPIO/en|GPIO]]. | ||
# | # Find the GPIO number corresponding to the desired terminal in the table[[Список GPIO|WB2.8]]/[[WB SH 3.5: Список GPIO|WB3.5]]/[[Wiren Board 4: Список GPIO|WB4]]/[[Wiren Board 5:Список GPIO|WB5]]. For terminal strip number 2 in version 2.8, it is GPIO 32. | ||
# | # Export GPIO to sysfs | ||
#:<pre>root@wirenboard:~# echo 32 > /sys/class/gpio/export</pre> | #:<pre>root@wirenboard:~# echo 32 > /sys/class/gpio/export</pre> | ||
# | # 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. | ||
#:<pre>root@wirenboard:~# echo out > /sys/class/gpio/gpio32/direction</pre> | #:<pre>root@wirenboard:~# echo out > /sys/class/gpio/gpio32/direction</pre> | ||
# | # Open the transistor, giving a logical high level to the gate: | ||
#:<pre>root@wirenboard:~# echo 1 > /sys/class/gpio/gpio32/value</pre> | #:<pre>root@wirenboard:~# echo 1 > /sys/class/gpio/gpio32/value</pre> | ||
# | # Close the transistor, giving a logical zero to the gate: | ||
#:<pre>root@wirenboard:~# echo 0 > /sys/class/gpio/gpio32/value</pre> | #:<pre>root@wirenboard:~# echo 0 > /sys/class/gpio/gpio32/value</pre> | ||