51单片机电梯控制器源文件+仿真文件八层电梯控制 八层电梯控制八层电梯控制 sbit beep = P2^6; sbit xia = P2^0; sbit zhong = P2^1; sbit shang = P2^2; uchar value2; sbit led1 = P1^7; //8个发光二极管定义 sbit led2 = P1^6; sbit led3 = P1^5; sbit led4 = P1^4; sbit led5 = P1^3; sbit led6 = P1^2; sbit led7 = P1^1; sbit led8 = P1^0; uchar dt_1