led demo:

please use the following command to compile the demo:
./../../../buildroot/output/host/usr/bin/aarch64-rockchip-linux-gnu-g++ main.cpp InfoLed.cpp -pthread -std=c++14 -o LedTest

please input LedTest + mode number to exec the demo
support mode(1~8):
all on,all off,scroll_wifi,scroll_bt,scroll_3,breath,blink,volume