//程序：ex30.c
//功能：在8×8LED點陣上從下向上滾動顯示出手機號碼 "13592346786"
#include <REGX51.H> //包含頭文件REGX51.H，定義了51單片機的所有SFR
//函數名：delayms
//函數功能：實現軟件延時
//形式參數：無符號整型變量i，控制時間為i*1ms
//返回值：無
void delayms(unsigned int i)
{unsigned char k;
while(i--)
for(k=0;k<120;k++); //120次空操作
}
void main()
{
unsigned char code led[]={0xff,0xe7,0xc7,0xe7,0xe7,0xe7,0xe7,0xe7, //1
0xff,0x87,0xf3,0xf3,0xc7,0xf3,0xf3,0x87, //3
0xff,0x87,0xbf,0x87,0xf3,0xf3,0xf3,0x87, //5
0xff,0xc7,0x93,0x93,0x93,0xc3,0xf3,0xc7, //9
0xff,0x87,0xf3,0xf3,0xc7,0x9f,0x9f,0x83, //2
0xff,0x87,0xf3,0xf3,0xc7,0xf3,0xf3,0x87, //3
0xff,0xf3,0xe3,0xd3,0xb3,0x83,0xf3,0xf3, //4
0xff,0xc7,0x9f,0x87,0x93,0x93,0x93,0xc7, //6
0xff,0x03,0xf3,0xe7,0xe7,0xcf,0xcf,0xcf, //7
0xff,0xc7,0x93,0x93,0xc7,0x93,0x93,0xc7, //8
0xff,0xc7,0x9f,0x87,0x93,0x93,0x93,0xc7}; //6
unsigned char w;
unsigned int i,j,k,m;
while(1)
{
for(k=0;k<88;k++) //顯示滾動行數控制變量
{
for(m=0;m<100;m++) //每個字符掃描顯示100次，控制每個字符顯示時間
{
w=0x01;
j=k;
for(i=0;i<8;i++)
{
P1=w; //行數據送P1口
P0=led[j]; //列數據送P0口
delayms(1);
P0=0xff; //關顯示
w<<=1; //行變量左移指向下一行
j++; //指向數組中下一個顯示碼
if(j>87)j=j-88; //如果列數據顯示完回到初始
}
}
}
}
}
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