使用PWM6输出PWM信号,由KEY1控制PWM占空比,每按一次,按键将会改变一次PWM的占空比.（采用UCOS操作系统编程。）-Use PWM6 output PWM signal, KEY1 controlled by the PWM duty cycle, every time, a button will change the PWM duty cycle. (Using UCOS operating system programming.)

中断方式 可调频率（35-1574Hz at11.0592MHz） 占空比 0-100 使用通信方式调整 频率 和占空比 EB d2 32 32 32 32 EB = 头字节 D2 = TH0 TL0 （max = 0xF7) 32 = 50 64=100 0= 0 -Interrupt adjustable frequency (35-1574Hz at11.0592MHz) 0-100 duty cycle using the communication freq