8位串行數碼管模塊__設計原理圖及測試程序

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/***采用2片595驅動，動態掃描原理顯示,需要單片機3路IO口（DIO接 P33 SCK接P32 RCK接P34），上電顯示時鐘****/
#include
unsigned int tcount;
unsigned char m;
static unsigned char second,minute,hour;

unsigned char code fseg[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};
unsigned char code segbit[]={0x80,0x40,0x20,0x10,0x08,0x04,0x02,0x01};
unsigned char disbuf[8]={0,0,0,0,0,0,0,0};

//數據傳輸//
void sdata(void)
{unsigned char b,c,num;

if(b==0)
{
b++;
num=segbit[m];
for(c=0;c<8;c++)
{P3_2=0;
P3_3=num&0x80;
num<<=1;
P3_2=1;
}

}

if(b==1)

{
b--;
if(m==2||m==5)
{num=0xbf;}
else
{num=fseg[disbuf[m]];}

for(c=0;c<8;c++)
{ P3_2=0;
P3_3=num&0x80;
num<<=1;
P3_2=1;
}

}
m++;
if(m==8)
{m=0;
}
}
//數據傳輸//

//延時0.1ms個單位//

void delay (unsigned char h)
{ while(h--);
}
//延時0.1ms個單位//

//數據輸出//
void out(void)
{P3_4=0;
delay(50);
P3_4=1;
}
//數據輸出//