stc89c52rc单片机矩阵键盘线反转法

ID:812531 · 发表于 2021-1-12 11:08

本帖最后由朝朝1 于 2021-1-14 17:56 编辑

#include<reg52.h>
#define DataPort P0
sbit LATCH1=P2^6;
sbit LATCH2=P2^7;
sbit BEEP=P2^3;
sbit key=P3^4;
unsigned char num1;
unsigned char code dofly_DuanMa[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,
0x77,0x7c,0x39,0x5e,0x79,0x71};
unsigned char code dofly_WeiMa[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};
unsigned char TempData[8];
void DelayUs2x(unsigned char t);
void DelayMs(unsigned char t);
void Display(unsigned char FirstBit,unsigned char Num);
unsigned char KeyScan(void);
unsigned char KeyPro(void);
void Init_Timer0(void);
void beep();
void main (void)
{
unsigned char num;
Init_Timer0();
while (1)
{
KeyPro();
num=KeyPro();
if(num!=0xff)
{
TempData[1]=dofly_DuanMa[num1];
}
}
}
void DelayUs2x(unsigned char t)
{
while(--t);
}
void DelayMs(unsigned char t)
{
while(t--)
{
//????1mS
DelayUs2x(245);
DelayUs2x(245);
}
}
void Display(unsigned char FirstBit,unsigned char Num)
{
static unsigned char i=0;
DataPort=0; //????,???????
LATCH1=1; //???
LATCH1=0;
DataPort=dofly_WeiMa[i+FirstBit]; //???
LATCH2=1; //???
LATCH2=0;
DataPort=TempData[i]; //?????,??
LATCH1=1; //???
LATCH1=0;
i++;
if(i==Num)
i=0;
}
void Init_Timer0(void)
{
TMOD |= 0x01; //????1,16????,??"|"?????????????????
//TH0=0x00; //????
//TL0=0x00;
EA=1; //?????
ET0=1; //???????
TR0=1; //???????
}
void Timer0_isr(void) interrupt 1
{
TH0=(65536-2000)/256; //???? 2ms
TL0=(65536-2000)%256;
Display(0,8); // ???????
}
unsigned char KeyScan(void) //??????,?????????
{
unsigned char temp,num;//???????
P3=0x0f; //??????0
temp=P3&0x0f; //?????
if(temp!=0x0f) //?????????
{
DelayMs(10); //??
if((P3&0x0f)!=0x0f)
{
temp=P3&0x0f; //?????
P3=temp|0xf0; //???????
num=P3&0xf0; //?????
while((P3&0xf0)!=0xf0);//???????
return(temp+num);//????????
}
} //????
}
/*
unsigned char KeyPro(void)
{
switch(KeyScan())
{
case 0x7e:return 0;break;//0 ??????????????
case 0x7d:return 1;break;//1
case 0x7b:return 2;break;//2
case 0x77:return 3;break;//3
case 0xbe:return 4;break;//4
case 0xbd:return 5;break;//5
case 0xbb:return 6;break;//6
case 0xb7:return 7;break;//7
case 0xde:return 8;break;//8
case 0xdd:return 9;break;//9
case 0xdb:return 10;break;//a
case 0xd7:return 11;break;//b
case 0xee:return 12;break;//c
case 0xed:return 13;break;//d
case 0xeb:return 14;break;//e
case 0xe7:return 15;break;//f
default:return 0xff;break;
}
}
*/
void beep()
{
unsigned char y;
BEEP=0;
DelayMs(0.8);
BEEP=1; //?????
}
unsigned char KeyPro(void)
{
switch(KeyScan())
{
case 0x7e:num1=0;break;//0 ??????????????
case 0x7d:num1=1;break;//1
case 0x7b:num1=2;break;//2
case 0x77:num1=3;break;//3
case 0xbe:num1=4;break;//4
case 0xbd:num1=5;break;//5
case 0xbb:num1=6;break;//6
case 0xb7:num1=7;break;//7
case 0xde:num1=8;break;//8
case 0xdd:num1=9;break;//9
case 0xdb:num1=10;break;//a
case 0xd7:num1=11;break;//b
case 0xee:num1=12;break;//c
case 0xed:num1=13;break;//d
case 0xeb:num1=14;break;//e
case 0xe7:num1=15;break;//f
default:return 0xff;break;
}
}

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stc89c52rc单片机矩阵键盘 线反转法

stc89c52rc单片机矩阵键盘线反转法