单片机矩阵1到16平方数码管显示.doc

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1、#include//51头文件#defineuintunsignedint//宏定义把unsignedint换成uint#defineucharunsignedchar//同上面ucharcodesmg[]={0x40,0x79,0x24,//数码管断码0~90x30,0x19,0x12,0x02,0x78,0x00,0x10};ucharbutt,num,gewei,shiwei,baiwei;//无符号字符定义变量uintzshu;//无符号字符整型变量定义voiddelay(uintz)//延时函数{uinti,j;//局

2、部变量定义I,jfor(i=z;i>0;i--)//for循环先循环外循环再循环内循环for(j=110;j>0;j--);}anjian()//16矩阵按键函数{P1=0xfe;//先把P1口给febutt=P1;//P1口的fe给变量按键buttbutt=butt&0xf0;//让butt和0xf0与一下，给下面好做判断if(butt!=0xf0)//如果与完之后的butt不等于0xf0，那么就有按键被按下{delay(3);//延时下防抖确认是不是抖动错误按下的butt=P1;//再把P1口断码给按键变量因为按键变量刚才和0xf0.变量变化

3、了所以要重新赋值butt=butt&0xf0;//再与一次是给下面做判断的if(butt!=0xf0)//如果是真的butt！=0xf的话就是有按键按下去。{butt=P1;//再把P1断码给buttswitch(butt)//判断变量butt如果是什么就执行后面的语句，break是跳出循环的。下面的第二排按键同理就不做介绍了。{case0xee:num=1;break;case0xde:num=2;break;case0xbe:num=3;break;case0x7e:num=4;}butt=P1;butt=butt&0xf0;while(!b

4、utt){butt=P1;butt=butt&0xf0;while(butt!=0xf0){delay(2);butt=P1;butt=butt&0xf0;}}}}P1=0xfd;butt=P1;butt=butt&0xf0;while(butt!=0xf0){delay(2);butt=P1;butt=butt&0xf0;while(butt!=0xf0){butt=P1;switch(butt){case0xed:num=5;break;case0xdd:num=6;break;case0xbd:num=7;break;case0x7d:nu

5、m=8;break;}butt=P1;butt=butt&0xf0;while(butt!=0xf0){delay(2);butt=P1;butt=butt&0xf0;while(butt!=0xf0){butt=P1;butt=butt&0xf0;}}}}P1=0xfb;butt=P1;butt=butt&0xf0;while(butt!=0xf0){delay(2);butt=P1;butt=butt&0xf0;while(butt!=0xf0){butt=P1;switch(butt){case0xeb:num=9;break;case0x

6、db:num=10;break;case0xbb:num=11;break;case0x7b:num=12;}butt=P1;butt=butt&0xf0;while(butt!=0xf0){delay(2);butt=P1;butt=butt&0xf0;while(butt!=0xf0){butt=P1;butt=butt&0xf0;}}}}P1=0xf7;butt=P1;butt=butt&0xf0;while(butt!=0xf0){delay(2);butt=P1;butt=butt&0xf0;while(butt!=0xf0){butt

7、=P1;switch(butt){case0xe7:num=13;break;case0xd7:num=14;break;case0xb7:num=15;break;case0x77:num=16;}butt=P1;butt=butt&0xf0;while(butt!=0xf0){delay(2);butt=P1;butt=butt&0xf0;while(butt!=0xf0){butt=P1;butt=butt&0xf0;}}}}returnnum;//返回来一个num值，1~16}pingfang(uchara)//调用num的值{zshu=

8、a*a;//调用到num的值再相乘就得到平方baiwei=zshu/100;//数位分解给数码管百位shiwei=zshu%100/10