点阵式LED“0－9”数字显示技术

#include <REGX51.H> unsigned char code tab[]={0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80}; unsigned char code digittab[10][8]={ {0x00,0x00,0x3e,0x41,0x41,0x41,0x3e,0x00}, //0 {0x00,0x00,0x00,0x00,0x21,0x7f,0x01,0x00}, //1 {0x00,0x00,0x27,0x45,0x45,0x45,0x39,0x00}, //2 {0x00,0x00,0x22,0x49,0x49,0x49,0x36,0x00}, //3 {0x00,0x00,0x0c,0x14,0x24,0x7f,0x04,0x00}, //4 {0x00,0x00,0x72,0x51,0x51,0x51,0x4e,0x00}, //5 {0x00,0x00,0x3e,0x49,0x49,0x49,0x26,0x00}, //6 {0x00,0x00,0x40,0x40,0x40,0x4f,0x70,0x00}, //7 {0x00,0x00,0x36,0x49,0x49,0x49,0x36,0x00}, //8 {0x00,0x00,0x32,0x49,0x49,0x49,0x3e,0x00} //9 }; unsigned int timecount; unsigned char cnta; //行号 unsigned char cntb; //列数 void main(void) //主程序 { TMOD=0x01; //定时器T0工作方式1 TH0=0xf4; //设定定时初值 TL0=0x48; TR0=1; //启动定时器 ET0=1; //开定时中断 EA=1; while(1) //循环等待中断 {; } } void t0(void) interrupt 1 using 0 //定时中断子程序 { TH0=0xf4; //重新设置定时初值 TL0=0x48; P3=tab[cnta]; P1=digittab[cntb][cnta]; cnta++; if(cnta==8) { cnta=0; } timecount++; if(timecount==333) { timecount=0; cntb++; if(cntb==10) { cntb=0; } } }