说明：  5045的底层操作程序,使用时根据实际接线情况对程序中管脚定义部分做适当修改 //定义管脚 sbit SCK=P3^4 //时钟 sbit SI=P3^5 //CPU--->5045 sbit SO=P3^5 //5045-->CPU sbit CS=P3^6 //片选
(5045 underlying operating procedure, when used in accordance with the actual situation on the process of wiring pin to do some appropriate changes to the definition// define pin sbit SCK = P3 ^ 4// clock sbit SI = P3 ^ 5// CPU-)