gpio 点灯

im8mp evk 拓展引脚EXP_P1_7点灯： 

root@imx8mpevk:~# ls /sys/bus/gpio/devices/
gpiochip0  gpiochip1  gpiochip2  gpiochip3  gpiochip4  gpiochip5
root@imx8mpevk:~# gpioinfo -c 5
gpiochip5 - 16 lines:
        line   0:       "EXT_PWREN1"            input
        line   1:       "EXT_PWREN2"            output
        line   2:       "CAN1/I2C5_SEL"         input
        line   3:       "PDM/CAN2_SEL"          input
        line   4:       "FAN_EN"                input
        line   5:       "PWR_MEAS_IO1"          input
        line   6:       "PWR_MEAS_IO2"          input
        line   7:       "EXP_P0_7"              input
        line   8:       "EXP_P1_0"              input
        line   9:       "EXP_P1_1"              input
        line  10:       "EXP_P1_2"              input
        line  11:       "EXP_P1_3"              input
        line  12:       "EXP_P1_4"              input
        line  13:       "EXP_P1_5"              input
        line  14:       "EXP_P1_6"              input
        line  15:       "EXP_P1_7"              input
root@imx8mpevk:~# gpioset -c 5 15=1  //亮
gpioset -c 5 15=0^C
root@imx8mpevk:~# gpioset -c 5 15=0  //灭
^[[A^C
root@imx8mpevk:~# gpioset -c 5 15=1
^C
root@imx8mpevk:~#
root@imx8mpevk:~#