只显示有效位的数码管

最新推荐文章于 2025-08-04 12:02:03 发布

乞求智慧的愚人

最新推荐文章于 2025-08-04 12:02:03 发布

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文章标签： c++ 开发语言

本文链接：https://blog.youkuaiyun.com/qq_53328464/article/details/127031178

该博客主要讲述了在C++环境下，利用中断实现数码管显示秒数，但遇到一个问题：秒数小于10时，个位数出现抖动，而大于10时正常。博主分享了代码并寻求解决方案。

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#include<reg52.h>

sbit HCA = P2^2;
sbit HCB = P2^3;
sbit HCC = P2^4;

unsigned char code LEDCHAR[] = {
       0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F
};
unsigned char LEDBUFF[] = {
       0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
};
unsigned char i = 0;
unsigned int x = 0;
unsigned char sign = 0;
unsigned char y = 7;
void main()
{
       unsigned long sec = 0;
       EA = 1;
       TMOD = 0x01;
       TH0 = 0xFC;
       TL0 = 0x67;
       ET0 = 1;
       TR0 = 1;

       while(1)
       {
               if(sign == 1)
               {
                       sign = 0;
                       sec++;

                       LEDBUFF[0] = LEDCHAR[sec%10];
                       LEDBUFF[1] = LEDCHAR[sec/10%10];
                       LEDBUFF[2] = LEDCHAR[sec/100%10];
                       LEDBUFF[3] = LEDCHAR[sec/1000%10];
                       LEDBUFF[4] = LEDCHAR[sec/10000%10];
                       LEDBUFF[5] = LEDCHAR[sec/100000%10];
                       LEDBUFF[6] = LEDCHAR[sec/1000000%10];
                       LEDBUFF[7] = LEDCHAR[sec/10000000%10];
                   while(LEDBUFF[y] == 0x3F)
                   {
                           LEDBUFF[y] = 0x00;
                           y--;
                   }
                   y = 7;
               }
       }
}

void InterruptTimer0()interrupt 1
{
       TH0 = 0xFC;
       TL0 = 0x67;
       x++;
       if(x == 1000)
       {
               x = 0;
               sign = 1;
       }
       P0 = 0x00;
       switch(i)
       {
               case 0:HCC = 0;HCB = 0;HCA = 0;i++;P0 = LEDBUFF[0];break;
               case 1:HCC = 0;HCB = 0;HCA = 1;i++;P0 = LEDBUFF[1];break;
               case 2:HCC = 0;HCB = 1;HCA = 0;i++;P0 = LEDBUFF[2];break;
               case 3:HCC = 0;HCB = 1;HCA = 1;i++;P0 = LEDBUFF[3];break;
               case 4:HCC = 1;HCB = 0;HCA = 0;i++;P0 = LEDBUFF[4];break;
               case 5:HCC = 1;HCB = 0;HCA = 1;i++;P0 = LEDBUFF[5];break;
               case 6:HCC = 1;HCB = 1;HCA = 0;i++;P0 = LEDBUFF[6];break;
               case 7:HCC = 1;HCB = 1;HCA = 1;i = 0;P0 = LEDBUFF[7];break;
               default:break;
       }

}
求助！！！虽然使用了中断，但当秒数小于十时，只有十位依然会抖动；当秒数大于十时，就又恢复正常无抖动发生，不知道为什么。