Openwrt下驱动开发小实例 文件放在Openwrt源码目录下的build_dir/target-mipsel_24kec+d uClibc-0.9.33.2/linux-自己平台信号/目录下，可参考https://wiki.microduino.cc/index.php/第十二课 MicroWRT_驱动开发 -Openwrt driven development under small example files on build_ Openwrt source directo