標(biāo)題: 矩陣按鍵控制共陰數(shù)碼管單片機(jī)程序 [打印本頁(yè)]
作者: 陶888    時(shí)間: 2023-5-26 11:34
標(biāo)題: 矩陣按鍵控制共陰數(shù)碼管單片機(jī)程序
#include<reg52.h>
#define SEG_DAT P2
#define SEG_BIT P0
           unsigned char code DispCode[]={
    0x3F,
    0x06,
    0x5B,
    0x4F,
    0x66,
    0x6D,
    0x7D,
    0x07,
    0x7F,
    0x6F,
    0x77,
    0x7C,
    0x39,
    0x5E,
    0x79,
    0x71
};
        unsigned char DisBuf[8]={1,2,3,4,5,8,7,8};
                 unsigned char bitn=0;
                bit bf_10ms=0;
                unsigned int ui_count_10ms=0;
                void T0_IRQ(void)interrupt 1
{
    TH0=(0-1000)/256;
        TL0=(0-1000)%256;
        {
    SEG_BIT=0xFF;
    SEG_DAT=DispCode[DisBuf[bitn]];
    SEG_BIT=~(1<<bitn);
        bitn=(bitn+1)%8;
}
ui_count_10ms++;
if(ui_count_10ms>=10)
{
ui_count_10ms=0;
bf_10ms=1;
}
}
void SystemInit(void)
{
  TMOD=0x11;
    TH0=(0-1000)/256;
        TL0=(0-1000)%256;
        TR0=1;
        ET0=1;
        EA=1;

}

void SetDisplay(unsigned long x)
{
    DisBuf[0]=x/1%10;
    DisBuf[1]=x/10%10;
    DisBuf[2]=x/100%10;
    DisBuf[3]=x/1000%10;
    DisBuf[4]=x/10000%10;
    DisBuf[5]=x/100000%10;
    DisBuf[6]=x/1000000%10;
    DisBuf[7]=x/10000000%10;
}


unsigned char KeyScan(void)
{
static char state=0;
unsigned char key=0xff,i;
switch(state)
{
case 0:P3=0xF0;
if((P3&0xF0)!=0xF0)
state =1;

break;
case 1:
P3=0xF0;
if((P3&0xF0)!=0xF0)
{
for (i=0;i<4;i++)
{
P3=(~(1<<i));
switch(P3&0xF0)
{
case 0xE0:key=i*4+0;break;
case 0xD0:key=i*4+1;break;
case 0xB0:key=i*4+2;break;
case 0x70:key=i*4+3;break;
}
}
state =2;
}
break;
case 2:
P3=0xF0;
if((P3&0xF0)!=0xF0)
state=2;
else state =0;
break;
default:break;
}
return key;
}




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