4乘4的矩阵按键.doc

/程序编写人：小艾QQ:873808971/程序编写时间：2012-4-23/程序实现的功能：矩阵的显示/#includereg52.h#define uchar unsigned char#define uint unsigned intvoid time(void);extern void display(unsigned char a,unsigned char b);extern void chuli(); /主程序/void main()time(); /定时器初始化子程序while(1)chuli();/处理子程序display(2,2);/显示子程序/定时器初始化/void time(void)TMOD |=0X01;EA=1 ;ET0=1 ;TR0=1 ;/定时器处理/void timep0(void) interrupt 1 using 1TH0=(65536-20000)/256;TL0=(65536-20000)%256;#includereg52.h#define uchar unsigned char#define uint unsigned int#define key P3extern void delay(unsigned int x);/按键处理子程序/unsigned char keyscan(void)char j,z;key=0x0f; /屏蔽高四位j=key&0x0f;/与if(j!=0x0f)/判断是否有按键按下delay(400);/延时子程序if(key&0x0f)!=0x0f)/判断按键是否真正按下j=key&0x0f;/把低四位的值给jkey=0xf0 ;/屏蔽低四位z=key&0xf0; /把高四位值给zif(key&0xf0)!=0xf0)/等待按键抬起switch(j|z)/散转查表case 0x7e:return 0;break;case 0x7d:return 1;break;case 0x7b:return 2;break;case 0x77:return 3;break;case 0xbe:return 4;break;case 0xbd:return 5;break;case 0xbb:return 6;break;case 0xb7:return 7;break;case 0xde:return 8;break;case 0xdd:return 9;break;case 0xdb:return 10;break;case 0xd7:return 11;break;case 0xee:return 12;break;case 0xed:return 13;break;case 0xeb:return 14;break;case 0xe7:return 15;break;default:return 0xff;break;return 0xff;#includereg52.h#define uchar unsigned char#define uint unsigned int#define output P0unsigned char code we8=0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f;unsigned char code du10=0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f;sbit du_la=P21;sbit we_la=P20;unsigned char du_l8; /寄存器extern void delay(unsigned int x);/显示子程序/void display(unsigned int a,unsigned b)uint i;/定义局部变量for(i=0;ib;i+)output=wei+a;/位送数据we_la=1; /开位选we_la=0; /锁位选output=du_li;/段选送数据du_la=1;/开段选du_la=0;/锁段选delay(200); /延时子程序output=0xff; /清零we_la=1; /开段选we_la=0; /锁段选output=0; /清零du_la=1; /开段选du_la=0; /锁段选#includereg52.h#define uchar unsigned char#define uint unsigned intextern unsigned char code du;extern unsigned char du_l8; /寄存器extern unsigned char keyscan(void);uchar mun;/处理子程序/void chuli()mun=keyscan();/调用按键扫描子程序if(mun!=0xff)/判断是否不等于，是执行括号du_l0=dumun/10;/十位的寄存器du_l1=dumun%10;/个位的寄存器#