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NanoPC-T4 入門操作-2操作GPIO輸入輸出

GPIO輸出
[email protected]:/sys/class/gpio# echo 32 > export  匯出GPIO1_A0
[email protected]:/sys/class/gpio# ls
export   gpio32     gpiochip128  gpiochip64  unexport
gpio156  gpiochip0  gpiochip32   gpiochip96
[email protected]:/sys/class/gpio# cd gpio32
[email protected]:/sys/class/gpio/gpio32# ls
active_low  device  direction  edge  power  subsystem  uevent  value
[email protected]
:/sys/class/gpio/gpio32# cat direction 檢視GPIO方向 in [email protected]:/sys/class/gpio/gpio32# echo out > direction 設定GPIO為輸出 [email protected]:/sys/class/gpio/gpio32# echo 1 > value GPIO輸出高電平 [email protected]:/sys/class/gpio/gpio32# echo 0 > value GPIO輸出低電平 GPIO輸入
[email protected]
:/sys/class/gpio# echo 33 > export 匯出GPIO1_A1 [email protected]:/sys/class/gpio# cd gpio33 [email protected]:/sys/class/gpio/gpio33# ls active_low device direction edge power subsystem uevent value [email protected]:/sys/class/gpio/gpio33# cat direction in [email protected]
:/sys/class/gpio/gpio33# cat value 鬆開按鈕獲取的電平 1 [email protected]:/sys/class/gpio/gpio33# cat value 按下按鈕獲取的電平 0

亮燈效果