OpenWRT 学习笔记（第21篇）基于GPIO Hotplug 和 DTS 的按键实验

https://openwrt.org/docs/guide-user/hardware/hardware.button?s[]=button

https://openwrt.org/docs/techref/hardware/port.gpio

https://openwrt.org/docs/guide-user/hardware/pwm

https://openwrt.org/docs/guide-user/hardware/mmc_over_gpio

http://www.forgotfun.org/2016/09/ MediaTech(MTK) MT7628 MT7688 Linux 下使用mmap实现用户态 GPIO 驱动 .html

GPIO作为General Purpose Input Output的简称，指的是通用输入输出接口，该接口具备对信号进行输入与输出的功能。然而，在实际应用中，并