利用8051片内定时器TO来测量外部脉冲宽度的例子-use within 8,051 TO timer to measure pulse width of the external example

对一方波的每一次电平跳变进行捕获，并用捕获值计算方波的脉冲宽度，占空比，周期或其他。-right side of every wave-hopping-- for capture, and capture value with the square wave pulse width and duty cycle. cycle or other.