单线搜索算法,适合51系列单片机,硬件访问层使用IO模拟,在其他平台应用,需要更改硬件层,已在89s52上测试通过-single search algorithm suitable for 51 series microprocessor, hardware access layer using IO simulation, In other platform, the need to change the hardware level, in 89 s52 through testing