uc/osii的c8051f移植的关键代码，我自己加入了串口与与一个定时器的移植汇编代码，对其他中断应用会有帮助 已通过测试。 -the key code of the uc/osii, c8051f transplantation, I joined the serial port and a timer transplant assembly code would be helpful to other interrupt application has been tested.