初始化串行端口(如果在目标上有的话)。
串行设备初始化不成功。串行驱动程序将卸载。
No serial device was successfully initialized. The serial driver will unload.
软件设计分为：初始化、串行中断服务程序、串行口选择三个模块。
Software designed divide into three model: initialize, serial interruption service programming, serial port selected.
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