本代码为编码开关代码，编码开关也就是数字音响中的

360度旋转的数字音量以及显示器上用的（单键飞梭开

关）等类似鼠标滚轮的手动计数输入设备。

我使用的编码开关为5个引脚的，其中2个引脚为按下

转轮开关（也就相当于鼠标中键）。另外3个引脚用来

检测旋转方向以及旋转步数的检测端。引脚分别为a,b,c

b接地a，c分别接到P2.0和P2.1口并分别接两个10K上拉

电阻，并且a，c需要分别对地接一个104的电容，否则

因为编码开关的触点抖动会引起轻微误动作。本程序不

使用定时器，不占用中断，不使用延时代码，并对每个

细分步数进行判断，避免一切误动作，性能超级稳定。

我使用的编码器是APLS的EC11B可以参照附件的时序图

编码器控制流水灯最能说明问题，下面是以一段流水

灯来演示。-This code for code switch code, coding switch is the digital audio

360 degrees of rotation digital volume and displays use on the open list key shuttle (

Closed) and similar mouse wheel manual count input device.

I use a code switch for five of the pins, with two pins for press

The runner switch (also is equivalent to the middle mouse button). Three other pins are used to

The rotation direction detection and rotation of the number of detection. Pins are respectively for a, b, c

B, c received a ground respectively P2.0 and P2.1 mouth and take two 10 K respectively on pull

Resistance, and a, c need to pick up a respectively in 104, otherwise the capacitance

Because of the code switch contacts jitter can cause minor wrong action. This procedure does not

Use timer, do not take up interrupt, do not use delay, and each code

Segment for judgment, avoid steps all misoperation, super stable performance.

I use of APLS is encoder EC11B can refer to the attachment sequence chart

Encode