在端口PD输出PWM脉冲,可用示波器测量,或者外加一LED灯，可以看到LED脉宽的变化-PD PWM pulse output port can be used oscilloscope or plus an LED light, you can see the LED pulse width changes

C8051F320在学习板上的pwm波输出的程序源码-C8051F320 learning board pwm wave output program source code

先产生一个周期和PWM波相同的周期信号，然后给定一个值，如果这个周期信号大于给定值则输出低电平，否则输出高电平所以，通过控制给定值的大小就可以控制Pwm的占空比了-First generating a cycle and the same cycle of the PWM wave signal, and then given a value, the output is low if this periodic signal is greater than a given value, oth