【文件属性】：
文件名称：arduino 改变端口频率
文件大小：6KB
文件格式：INO
更新时间：2016-09-18 09:15:47
arduino PWM
This Arduino application reads input over the built-in serial interface and sets
a modulated pulse output composed of a high speed pulse and a low speed pulse.
Set your monitor window to send a carriage return at the end of each message.
The serial interface accepts a command set as described below in the usage()
function