簡易單片機秒表計時器不成功

ID:811100 · 發表于 2021-4-2 13:26

功能上電后顯示0000，然后每個1秒數碼管值加1，加到9999時從0000重新開始。
#include <REGX52.H>
#define uchar unsigned char
#define uint unsigned int
uchar code duanma[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};//段碼
uchar code weima[]={0xef,0xeb,0xe7,0xe3};//位碼
//0xff;0xfb;0xf7;0xf3;0xef;0xeb;0xe7;0xe3
uchar dispbuf[];
uint count;
void delayms(uint xms)//延時函數
{
      uchar i, j;
      while(xms--)
            {
            i = 2;j = 199;
            do{while (--j);}
            while (--i);
            }
}
void duan(void)
{
      dispbuf[3]=count/1000;
      dispbuf[2]=count/100%10;
      dispbuf[1]=count/10%10;
      dispbuf[0]=count%10;
      }
void wei(void)
{
      uchar x;
      for(x=0;x<4;x++)
      {
            P0=duanma[dispbuf[x]];
            P2=weima[x];
            delayms(1);
      }
}
void main()
{
      uint k;
      while(1)
      {
            if(++k==220)
            {
                     k=0;
                     if(++count==10000)count=0;
            }
            duan();
            wei();
      }
}
是哪里有問題啊？