此源代码程序为三色LED灯板PWM 控制程序，实现多路LED灯恒流控制。

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

用C语言来实现LED的渐明渐暗效果，从而实现了PWM-PWM

In this archive is included an example code in proton basic compiler how to implement PWM using interrupt.It is used for regulating light intensity of led diode depending on light ambient.When the light is low led diode is full powered and light inte