udoo 绿灯闪烁 代码

[unissoft-bj]

！！！进入编辑模式复制执行命令

cat >> /root/blink.sh << EOF

!/bin/bash

workingLED=55 echo out > /sys/class/gpio/gpio\${workingLED}/direction

while true do echo 1 > /sys/class/gpio/gpio\${workingLED}/value usg=\$(top -bn 1 | awk '{print \$9}' | tail -n +8 | awk '{s+=\$1} END {print s}') tmp=\$((\$usg / 20)) iusg=\$(( \$tmp + 1 )) intvl=\$(echo \$iusg | awk '{printf "%.3f \n", 1/\$usg}') echo 0 > /sys/class/gpio/gpio\${workingLED}/value sleep \$(echo \$intvl | awk '{printf "%.3f \n", \$intvl/1}') done EOF

echo "@reboot sudo bash /root/blink.sh" >> /var/spool/cron/crontabs/root

reboot