数码管-矩阵按键.zip

#include "reg52.h" typedef unsigned int u16; typedef unsigned char u8; #define GPIO_KEY P1 sbit LSA=P2^2; sbit LSB=P2^3; sbit LSC=P2^4; sbit k1=P3^1; sbit k2=P3^0; sbit k3=P3^2; u8 KeyValue; u8 a; char keynum; u8 DisplayData[8]; u8 code smgduan[17]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07, 0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71}; void delay(u16 i) { while(i--); } u8 KeyScan(u8 mode) { if(k1==0||k2==0) { delay(1000); if(k1==0)return 1; else if(k2==0)return 2; } return 0; } void DigDisplay() { u8 i; for(i=0;i<8;i++) { switch(i) { case(0): LSA=0;LSB=0;LSC=0; break; case(1): LSA=1;LSB=0;LSC=0; break; case(2): LSA=0;LSB=1;LSC=0; break; case(3): LSA=1;LSB=1;LSC=0; break; case(4): LSA=0;LSB=0;LSC=1; break; case(5): LSA=1;LSB=0;LSC=1; break; case(6): LSA=0;LSB=1;LSC=1; break; case(7): LSA=1;LSB=1;LSC=1; break; } P0=DisplayData[i]; delay(100); P0=0x00; } } void KeyDown(void) { char a=0; DigDisplay(); GPIO_KEY=0x0f; if(GPIO_KEY!=0x0f) { delay(1000); if(GPIO_KEY!=0x0f) { GPIO_KEY=0X0F; switch(GPIO_KEY) { case(0X07): KeyValue=0;break; case(0X0b): KeyValue=1;break; case(0X0d): KeyValue=2;break; case(0X0e): KeyValue=3;break; } GPIO_KEY=0XF0; switch(GPIO_KEY) { case(0X70): KeyValue=KeyValue;break; case(0Xb0): KeyValue=KeyValue+4;break; case(0Xd0): KeyValue=KeyValue+8;break; case(0Xe0): KeyValue=KeyValue+12;break; } while((a<50)&&(GPIO_KEY!=0xf0)) { delay(1000); a++; } } } DisplayData[0]=smgduan[KeyValue]; } void datapros() { u8 key=KeyScan(0); DigDisplay(); switch(key) { case 1: keynum++; delay(15000); if(keynum==100) { keynum=0; } break; case 2: keynum--; delay(15000); if(keynum<=0) { keynum=99; } break; } DisplayData[0]=smgduan[keynum%10]; DisplayData[1]=smgduan[keynum/10]; } void main() { while(1) { if(k3==0) { delay(1000); if(k3==0) { a++; } while(!k3); } if(a==0) { datapros(); } else if(a==1) { KeyDown(); } else if(a==2) { a=0; } } }