8X8LED点阵显示数字 /* 名称:8X8LED点阵显示数字 说明:8X8LED点阵屏循环显示数字0~9,刷新过程由定时器中断完成。*/#include<reg51.h>#include<intrins.h>#define uchar unsigned char#define uint unsigned intuchar code Table_of_Digits[]={ 0x00,0x3e,0x41,0x41,0x41,0x3e,0x00,0x00, //0 0x00,0x00,0x00,0x21,0x7f,0x01,0x00,0x00, //1 0x00,0x27,0x45,0x45,0x45,0x39,0x00,0x00, //2 0x00,0x22,0x49,0x49,0x49,0x36,0x00,0x00, //3 0x00,0x0c,0x14,0x24,0x7f,0x04,0x00,0x00, //4 0x00,0x72,0x51,0x51,0x51,0x4e,0x00,0x00, //5 0x00,0x3e,0x49,0x49,0x49,0x26,0x00,0x00, //6 0x00,0x40,0x40,0x40,0x4f,0x70,0x00,0x00, //7 0x00,0x36,0x49,0x49,0x49,0x36,0x00,0x00, //8 0x00,0x32,0x49,0x49,0x49,0x3e,0x00,0x00 //9};uchar i=0,t=0,Num_Index;//主程序void main(){ P3=0x80; Num_Index=0; //从0开始显示 TMOD=0x00; //T0方式0 TH0=(8192-2000)/32; //2ms定时 TL0=(8192-2000)%32; IE=0x82; TR0=1; //启动T0 while(1);}//T0中断函数void LED_Screen_Display() interrupt 1{ TH0=(8192-2000)/32; //恢复初值 TL0=(8192-2000)%32; P0=0xff; //输出位码和段码 P0=~Table_of_Digits[Num_Index*8+i]; P3=_crol_(P3,1); if(++i==8) i=0; //每屏一个数字由8个字节构成 if(++t==250) //每个数字刷新显示一段时间 { t=0; if(++Num_Index==10) Num_Index=0; //显示下一个数字 }}
非常感谢你能给我解答,
P0=0xff; //输出位码和段码 P0=~Table_of_Digits[Num_Index*8+i];这两句起啥作用?
非常感谢你能给我解答,
P0=0xff; //输出位码和段码
P0=~Table_of_Digits[Num_Index*8+i];这两句怎么分析?
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