Contents

• • Child Pages
• 如何使用GPIO
• cat /sys/kernel/debug/gpio

Child Pages

如何使用GPIO

# 启用GPIO#11
echo "11" > /sys/class/gpio/export
# 设置GPIO为输出
echo "out" > /sys/class/gpio/gpio11/direction
# 输出高电平
echo "1" > /sys/class/gpio/gpio11/value
# 输出低电平
echo "0" > /sys/class/gpio/gpio11/value

cat /sys/kernel/debug/gpio

root@NHX6018-0-NPN-256M32-D4-64:~# cat /sys/kernel/debug/gpio
GPIOs 0-79, platform/1000000.pinctrl, 1000000.pinctrl:
 gpio0   : in  0 2mA pull down
 gpio1   : in  1 8mA pull down
 gpio2   : in  0 2mA pull down
 gpio3   : in  1 8mA pull down
 gpio4   : in  1 8mA pull down
 gpio5   : in  1 8mA pull down
 gpio6   : in  1 8mA pull down
 gpio7   : in  1 8mA pull down
 gpio8   : in  1 8mA pull down
 gpio9   : in  0 8mA pull up
 gpio10  : in  1 8mA pull down
 gpio11  : in  1 8mA pull down
 gpio12  : in  1 8mA pull down
 gpio13  : in  1 8mA pull down
 gpio14  : in  1 8mA pull down
 gpio15  : in  1 8mA pull down
 gpio16  : in  0 2mA pull down
 gpio17  : in  1 8mA pull down
 gpio18  : in  0 2mA pull down
 gpio19  : in  0 8mA pull up
 gpio20  : in  0 2mA pull down
 gpio21  : in  0 2mA pull down
 gpio22  : in  0 2mA pull down
 gpio23  : in  0 2mA pull down
 gpio24  : in  0 2mA pull down
 gpio25  : in  0 2mA pull down
 gpio26  : in  0 2mA pull down
 gpio27  : in  0 2mA pull down
 gpio28  : in  0 2mA pull down
 gpio29  : in  0 2mA pull down
 gpio30  : in  0 2mA pull down
 gpio31  : in  0 2mA pull down
 gpio32  : in  0 2mA pull down
 gpio33  : in  0 2mA pull down
 gpio34  : in  0 2mA pull down
 gpio35  : out 0 8mA pull down
 gpio36  : in  0 2mA pull down
 gpio37  : out 0 8mA pull down
 gpio38  : in  3 8mA pull down
 gpio39  : in  3 8mA pull down
 gpio40  : in  2 8mA pull down
 gpio41  : in  2 8mA pull down
 gpio42  : in  2 8mA pull down
 gpio43  : in  2 8mA pull down
 gpio44  : out 1 8mA pull down
 gpio45  : out 1 8mA pull down
 gpio46  : in  1 2mA pull down
 gpio47  : in  1 2mA pull down
 gpio48  : in  1 8mA pull down
 gpio49  : in  1 8mA pull down
 gpio50  : out 0 2mA pull down
 gpio51  : in  0 2mA pull down
 gpio52  : in  0 2mA pull down
 gpio53  : in  0 2mA pull down
 gpio54  : in  0 2mA pull down
 gpio55  : in  1 8mA pull down
 gpio56  : in  1 8mA pull down
 gpio57  : in  1 8mA pull down
 gpio58  : in  1 8mA pull down
 gpio59  : in  0 2mA pull down
 gpio60  : in  0 2mA pull down
 gpio61  : in  0 2mA pull down
 gpio62  : in  1 8mA pull up
 gpio63  : in  0 2mA pull down
 gpio64  : in  1 8mA pull up
 gpio65  : in  1 8mA pull up
 gpio66  : in  0 2mA pull down
 gpio67  : in  0 2mA pull down
 gpio68  : in  0 2mA pull down
 gpio69  : in  1 8mA no pull
 gpio70  : in  1 8mA no pull
 gpio71  : in  1 8mA no pull
 gpio72  : in  1 8mA no pull
 gpio73  : in  0 2mA pull down
 gpio74  : in  0 2mA pull down
 gpio75  : out 0 2mA pull up
 gpio76  : in  0 2mA pull down
 gpio77  : in  0 2mA pull down
 gpio78  : in  0 2mA pull down
 gpio79  : in  0 2mA pull down
root@NHX6018-0-NPN-256M32-D4-64:~#