动态的实现在液晶屏上打点绘制波形，可以通过设置函数来实现正弦波，余弦，圆等，规则函数图形。系统支持，51，52 C语言开发环境。-Achieve dynamic LCD screen RBI draw waveforms can be achieved by setting the function sine, cosine, round, etc., rules function graphics. System support, 51,52 C language development en