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en:general_information:tutorial:gpio [2021/04/19 07:07] – [Set GPIO as Input] removed unnecessary quotes lenzen:general_information:tutorial:gpio [2025/01/28 11:17] (current) – external edit 127.0.0.1
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 ====== Using GPIO from sysfs ====== ====== Using GPIO from sysfs ======
  
-===== Where to find GPIO's in sysfs =====+=== Where to find GPIO's in sysfs ===
  
 GPIO's are listed under **/sys/class/gpio** GPIO's are listed under **/sys/class/gpio**
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 <code> <code>
-root@MBaXXX:~ echo <gpionr> >/sys/class/gpio/export                  // export GPIO pin+root@MBaXXX:~ echo <gpionr> > /sys/class/gpio/export                 // export GPIO pin
 root@MBaXXX:~ echo out > /sys/class/gpio/gpio<gpionr>/direction      // set GPIO direction root@MBaXXX:~ echo out > /sys/class/gpio/gpio<gpionr>/direction      // set GPIO direction
 root@MBaXXX:~ echo 1 > /sys/class/gpio/gpio<gpionr>/value            // toggle GPIO to high  root@MBaXXX:~ echo 1 > /sys/class/gpio/gpio<gpionr>/value            // toggle GPIO to high 
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 ++++ example | ++++ example |
 <code> <code>
-root@MBaXXX:~ echo 34 >/sys/class/gpio/export +root@MBaXXX:~ echo 34 > /sys/class/gpio/export 
-root@MBaXXX:~ echo out >/sys/class/gpio/gpio34/direction+root@MBaXXX:~ echo out > /sys/class/gpio/gpio34/direction
 root@MBaXXX:~ echo 1 > /sys/class/gpio/gpio34/value root@MBaXXX:~ echo 1 > /sys/class/gpio/gpio34/value
 root@MBaXXX:~ echo 0 > /sys/class/gpio/gpio34/value root@MBaXXX:~ echo 0 > /sys/class/gpio/gpio34/value
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 <code> <code>
-root@MBaXXX:~ echo <gpionr> >/sys/class/gpio/export                  // export GPIO pin +root@MBaXXX:~ echo <gpionr> > /sys/class/gpio/export                 // export GPIO pin 
 root@MBaXXX:~ echo in > /sys/class/gpio/gpio<gpionr>/direction       // set GPIO direction root@MBaXXX:~ echo in > /sys/class/gpio/gpio<gpionr>/direction       // set GPIO direction
 root@MBaXXX:~ cat /sys/class/gpio/gpio<gpionr>/value                 // read GPIO value root@MBaXXX:~ cat /sys/class/gpio/gpio<gpionr>/value                 // read GPIO value