ex5_4.c

单片机应用技术（C语言版）程序源代码.rar

//程序：ex5_4.c
//功能：采用二维数组实现的在8×8LED点阵上循环显示数字0~9程序
#include  "REG51.H"
void delay1ms();     //延时约1ms函数声明
void main()          //主函数
{
   unsigned char code led[]={{0x18,0x24,0x24,0x24,0x24,0x24,0x24,0x18}, 	//0
                             {0x00,0x18,0x1c,0x18,0x18,0x18,0x18,0x18},		//1
                             {0x00,0x1e,0x30,0x30,0x1c,0x06,0x06,0x3e},		//2
                             {0x00,0x1e,0x30,0x30,0x1c,0x30,0x30,0x1e},		//3
                             {0x00,0x30,0x38,0x34,0x32,0x3e,0x30,0x30},		//4
                             {0x00,0x1e,0x02,0x1e,0x30,0x30,0x30,0x1e},		//5
                             {0x00,0x1c,0x06,0x1e,0x36,0x36,0x36,0x1c},		//6
                             {0x00,0x3f,0x30,0x18,0x18,0x0c,0x0c,0x0c},		//7
                             {0x00,0x1c,0x36,0x36,0x1c,0x36,0x36,0x1c},		//8
                             {0x00,0x1c,0x36,0x36,0x36,0x3c,0x30,0x1c}};	//9
                                                                                //定义二维数组，参见3.5.2节
   unsigned char w; 
   unsigned int i,j,k,m; 
   while(1) {
      for(k=0;k<10;k++)        //第一维下标取值范围0～9
      {
         for(m=0;m<400;m++)
         {
            w=0x01; 
            for(j=0;j<8;j++)   //第二维下标取值范围0～7
            {
               P1=w;		 
               P0=led[k][j];   //将指定数组元素赋值给P0口
               delay1ms(); 
               w<<=1;
            }
         }        
      }  
            }
}
//函数名：delay1ms
//函数功能：采用软件实现延时约1ms
//形式参数：无 
//返回值：无
void delay()
{  
   unsigned char  i;
   for(i=0;i<0x10;i++);
}