// 範例8-2C:單色8×8點矩陣字幕機顯示多個字
//檔名ch8_2.C 

#include <reg51.h>

void delay1ms(int count);
unsigned char code font1[]={0x22,0x24,0x28,0xF0,0x28,0x24,0x22,0x21,
                            0x3C,0x24,0x24,0xFF,0x24,0x24,0x3C,0x00,
                            0x18,0x18,0x18,0xFF,0xFF,0x18,0x18,0x18,
						    0x81,0x8F,0x81,0xFF,0x91,0x91,0x91,0x81};
unsigned char code ctrl[]={0x7f,0xbf,0xdf,0xef,0xf7,0xfb,0xfd,0xfe}; // addr
main()
{
	unsigned char i,j;
	unsigned char code *ptr =font1;

	while(1) {
	    for(j=0;j<40;j++){
  	        ptr=font1+8*(j/10);   // 掃描10次之後換字
            for(i=0;i<8;i++) {
	          P1=0xff ;          // 關閉掃描線
	          P0=~(*ptr++) ;      // 取出字型資料,並自動指向下一個
	          P1=ctrl[i];   
	          delay1ms(100) ;    //  時間延遲
        }// for i
     } // for j
   }// while
} 

void delay1ms(int count)  
{
	int i,j;

	for(i=0;i<count;i++)     //透過引數count控制外迴圈數
       		for(j=0;j<122;j++);
}