单片机密码锁电路设计工作原理 第5页
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C语言源程序
＃i nclude
unsigned char code ps[]={1,2,3,4,5};
unsigned char code dispcode[]={0x3f,0x06,0x5b,0x4f,0x66,
                               0x6d,0x7d,0x07,0x7f,0x6f,0x00,0x40};
unsigned char pslen=9;
unsigned char templen;
unsigned char digit;
unsigned char funcount;
unsigned char digitcount;
unsigned char psbuf[9];
bit cmpflag;
bit hibitflag;
bit errorflag;
bit rightflag;
unsigned int second3;
unsigned int aa;
unsigned int bb;
bit alarmflag;
bit exchangeflag;
unsigned int cc;
unsigned int dd;
bit okflag;
unsigned char oka;
unsigned char okb;
void main(void)
{
  unsigned char i,j;
  P2=dispcode[digitcount];
  TMOD=0x01;
  TH0=(65536-500)/256;
  TL0=(65536-500)%6;
  TR0=1;
  ET0=1;
  EA=1;
while(1) 
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                  if(hibitflag==0)
                    {
                      funcount++;
                      if(funcount==pslen+2)
                        {
                          funcount=0;
                          cmpflag=1;
                         }
                       P1=dispcode[funcount];
                    }
                    else
                      {
                         second3=0;
                      }
                  while(P3_6==0);
                }
            }
          if(P3_7==0) //digit key
            {
              for(i=10;i>0;i--)
              for(j=248;j>0;j--);
              if(P3_7==0)
                {
                  if(hibitflag==0)
                    {
                      digitcount++;                     
                      if(digitcount==10)
                        {
                          digitcount=0;
                        }
                      P2=dispcode[digitcount];
                      if(funcount==1)
                        {
                          pslen=digitcount;
                          templen=pslen;
                        }
                        else if(funcount>1)
                          {
                            psbuf[funcount-2]=digitcount;
                          }
                    }
                    else                       {

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