RT5350 ttyS1被用作console,ttyS0原始是不能直接用作串口通信的，安装里面所描述的操作就可以将ttyS0当作串口通信使用-RT5350 ttyS1 be used as a console, ttyS0 original can not be directly used for serial communication, installed inside the operation can be described as a serial communication usin