【飞腾派4G版免费试用】2飞腾派 openkylin 进行IO控制-灯闪

接上文[【飞腾派4G版免费试用】2飞腾派 openkylin 固件烧录(https://bbs.elecfans.com/jishu_2404663_1_1.html)
进行IO控制其实不需要上显示和openkylin这么大的系统，
实时性也不十分好。
转接网线，在com打nmcli

可以根据此ip
接ssh

导出GPIO3_1(GPIO3_1 的编号为 448+1=449)引脚进行IO控制

openkylin@openkylin:~$ cd /sys
openkylin@openkylin:/sys$ ls
block  bus  class  dev  devices  firmware  fs  kernel  kylin_authentication  kylin_kmod  module  power
openkylin@openkylin:/sys$ cd class
openkylin@openkylin:/sys/class$ dir
ata_device   devfreq         gpio           iommu     nvme            pps           sas_device      scsi_host   udc
ata_link     devfreq-event   graphics       lcd       nvme-fabrics    ptp           sas_end_device  sound       uio
ata_port     dma             hwmon          leds      nvme-subsystem  pwm           sas_expander    spi_master  usb_role
backlight    drm             i2c-adapter    mdio_bus  pci_bus         rapidio_port  sas_host        tcmdev      vc
bdi          drm_dp_aux_dev  i2c-dev        mem       pci_epc         regulator     sas_phy         tee         virtio-ports
block        extcon          ieee80211      misc      phy             remoteproc    sas_port        thermal     vtconsole
bluetooth    fc              infiniband     mmc_host  pktcdvd         rfkill        scsi_device     tpm         wakeup
bsg          fcloop          infiniband_cm  mtd       powercap        rpmsg         scsi_disk       tpmrm       watchdog
devcoredump  firmware        input          net       power_supply    rtc           scsi_generic    tty
openkylin@openkylin:/sys/class$ cd gpio
openkylin@openkylin:/sys/class/gpio$ didr
-bash: didr：未找到命令
openkylin@openkylin:/sys/class/gpio$ ls
export  gpiochip416  gpiochip432  gpiochip448  gpiochip464  gpiochip480  gpiochip496  unexport
Last login: Fri Aug 25 14:38:38 2023 from 192.168.2.201
openkylin@openkylin:~$ sudo su
[sudo] openkylin 的密码：
对不起，请重试。
[sudo] openkylin 的密码：
root@openkylin:/home/openkylin# ls
led.sh

led.sh

#!/bin/sh

LED_GPIO=/sys/class/gpio/gpio449

if test -d $LED_GPIO; then

    echo "GPIO449 already exported"

else

    echo 449 > /sys/class/gpio/export

fi

echo out > $LED_GPIO/direction

while true; do

    echo 0 > $LED_GPIO/value

    sleep 0.5

    echo 1 > $LED_GPIO/value

    sleep 0.5
done

root@openkylin:/home/openkylin# bash ./led.sh

灯正常闪
文件加X执行
root@openkylin:/home/openkylin# ./led.sh
GPIO449 already exported

达到预期。