一段控制步进电机的转动的程序，包含源代码-Control of stepper motor rotation period of the procedure, including the source code

嵌入式实验，通过改写串口，可以控制实验平台上的电风扇进行转动。-Shandong University, embedded experiment source code, control the fans on the experimental platform rotation.

Qt实现显示svg图片，并可拖动鼠标旋转，新人做的效果不是很好。环境ubuntu16.04+Qt5.6.1，本人新测代码在WIN7+Qt环境下可用。-Qt display SVG pictures, and drag the mouse rotation, the new effect is not very good. Environment ubuntu16.04+Qt5.6.1, my new test code is available in the WIN7+Qt environmen