30个完整的程序代码。是学习STC89C52RC的必备程序代码，都调试可以用。而且在AT89S52上面也完全可以用，只要引脚没有错误。-30 the complete code. Is essential to learn STC89C52RC code are debugging can. But also in the AT89S52 also able to use the above as long as the pin no errors.