为什么数码管显示小时的有一位不亮

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wl20030908| 初级技术员

楼主 | 2023-10-14 10:48 | 只看该作者 |只看大图回帖奖励

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单片机, stc, 蓝桥杯

本帖最后由 wl20030908 于 2023-10-14 11:12 编辑

#include "stc15.h"
#include "intrins.h"
#include "ds1302.h"

unsigned char code write[7]={0x80,0x82,0x84,0x86,0x88,0x8A,0x8C} ;
unsigned char code read[7]={0x81,0x83,0x85,0x87,0x89,0x8B,0x8D};
unsigned char nowtime[7]={0x00,0x07,0x17,0x12,0x10,0x04,0x23};
unsigned char time[8];
unsigned char code SMG_NoDot[18] =
{0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,
   0x80,0x90,0x88,0x80,0xc6,0xc0,0x86,0x8e,
   0xbf,0x7f};

               void selevcehc573(unsigned char channel)
               {
               switch(channel)
               {
                     case 4:
                              P2=(P2&0x1f)|0x80;
                     break;
                        case 5:
                              P2=(P2&0x1f)|0xa0;
                     break;
                              case 6:
                              P2=(P2&0x1f)|0xc0;
                     break;
                              case 7:
                              P2=(P2&0x1f)|0xe0;
                     break;
               }
               }

void Timer0_Init(void)             //1毫秒@12.000MHz
{
      AUXR &= 0x7F;                      //定时器时钟12T模式
      TMOD &= 0xF0;                      //设置定时器模式
      TL0 = 0x18;                               //设置定时初始值
      TH0 = 0xFC;                               //设置定时初始值
      TF0 = 0;                               //清除TF0标志
      TR0 = 1;                               //定时器0开始计时
      ET0 = 1;       //使能定时器0中断
  EA=1;
}

void writeds1302()
{
unsigned char i;
            Write_Ds1302_Byte(0x8e,0x00);
      for(i=0;i<8;i++)
      {
      Write_Ds1302_Byte(write,nowtime);
      }
      Write_Ds1302_Byte(0x8e,0x80);
}

void readds1302()
{
unsigned char i;
      for(i=0;i<8;i++)
         {
            nowtime=Read_Ds1302_Byte( read)/16*10+ Read_Ds1302_Byte(read)%16;
               }
}

void smg()
{
      static char i;
selevcehc573(6);
      P0=0x01<<i;
selevcehc573(7);
      P0=SMG_NoDot[ time];
      i=(i+1)%8;
}

void smg1()
{
      time[0]=nowtime[2]/10;
      time[1]=nowtime[2]%10;
      time[2]=16;
      time[3]=nowtime[1]/10;
      time[4]=nowtime[1]%10;
      time[5]=16;
      time[6]=nowtime[0]/10;
      time[7]=nowtime[0]%10;
}

void main()
{
      Timer0_Init();
      writeds1302();

while(1)
{
readds1302();
}
}

void Timer0_Isr(void) interrupt 1
{
      static int g;
      g++;
      smg();
      smg1();
}

QQ图片20231014110819.jpg (295.51 KB )

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为什么数码管显示小时的有一位不亮

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