下面是MAX1241和51单片机连接的电路图： 
本程序的完整工程文件下载: http://www.ruidan.com/f/1241.rar 以下是源码: #include <reg51.h> #defineuchar unsigned char #define uint unsigned int #define High 1 #define Low0 int t; sbit cs=P2^7; sbit sclk=P2^6; sbit dout=P2^5; unsigned char b[5]; uchar code tv[]={0x08,0x10,0x20,0x40,0X80};//位选 uchar code dc[]={0xC0, //"0" 0xF9, //"1" 0xA4, //"2" 0xB0, //"3" 0x99, //"4" 0x92, //"5" 0x82, //"6" 0xF8, //"7" 0x80, //"8" 0x90, //"9" }; uint dushuju() //定义为可以返回的参数 { uint voltage_temp=0; uchar ucloop=12; cs=High; sclk=Low; cs=Low; while(dout==0);//EOC信号为高表示转换结束 sclk=High; sclk=Low; while(ucloop--) { sclk=High;//上升沿数据稳定并读出 voltage_temp<<=1; if(dout==1) voltage_temp+=1; sclk=Low; } cs=High; return voltage_temp; //返回数据 } void shuxiang(void ) { char i, j; t=dushuju(); //调用数据 b[0]=(t/10000)%10; //取得整数值到数组 b[1]=(t/1000)%10; b[2]=(t/100)%10; b[3]=(t/10)%10; b[4]=(t/1)%10; b[5]=0; for(i=0;i<5;i++) { P3=tv[i]; j=b[i]; P1=dc[j]; Delay(); } } void delay(void) { uint i; for(i=0;i<100;i++); } main() { loop: dushuju(); shuxiang(); goto loop; }