在ok6410开发板移植了uc/osII操作系统，并用PWM定时器实现了蜂鸣器播放乐谱及led显示的功能，所有代码均已调试成功。-In ok6410 development board transplant uc/osII operating system, and with the PWM timer function to achieve the buzzer to play the score and led display, all of the code have been succe