//-----------------------------------------------------------------
        //  名稱: 數(shù)碼管顯示撥碼開關(guān)編碼
        //-----------------------------------------------------------------
        //  說明: 系統(tǒng)顯示撥碼開關(guān)所設(shè)置的編碼000～255。
        //-----------------------------------------------------------------
        #include <reg51.h>
        #include <intrins.h>
        #define uchar unsigned char
        #define uint  unsigned int
        //各數(shù)字的數(shù)碼管段碼
        uchar code DSY_CODE[] = {0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F};
        //顯示緩沖
        uchar DSY_Buffer[3] = {0,0,0};
        //-----------------------------------------------------------------
        // 延時
        //-----------------------------------------------------------------
        void DelayMS(uint x)
        {
          uchar i;
          while(x--) for(i = 0; i < 120; i++);
        }
        //-----------------------------------------------------------------
        // 主程序
        //-----------------------------------------------------------------
        void main()
        {
          uchar i,m,Num;
          P0 = 0xFF;
          P2 = 0xFF;
          while(1)
          {
            m = 0xFE;
            //讀取撥碼開關(guān)的值
            Num = P1;
            DSY_Buffer[0] = Num /100;
            DSY_Buffer[1] = Num /10 % 10;
            DSY_Buffer[2] = Num % 10;
            //刷新顯示在數(shù)碼管上
            for(i = 0; i < 3; i++)
            {
                m = _crol_(m,1);
                P2 = m;
                P0 = DSY_CODE[ DSY_Buffer[i] ];
                DelayMS(10);
            }
          }
        }