43.基于AT89C51单片机的按键控制8×8LED点阵屏显示图形设计.zip

#include <reg52.h> #include <intrins.h> #define uchar unsigned char #define uint unsigned int uchar code M[3][8]= { {0x00,0x7e,0x7e,0x7e,0x7e,0x7e,0x7e,0x00}, {0x00,0x38,0x44,0x54,0x44,0x38,0x00,0x00}, {0x00,0x20,0x30,0x38,0x3c,0x3e,0x00,0x00} }; uchar i,j; void main() { P0 = 0xff; P1 = 0xff; TMOD = 0x01; TH0 = (65535-2000)/256; TL0 = (65535-2000)%256; IT0 = 1; IE = 0x83; i = 0xff; while(1); } void Key_Down() interrupt 0 { P0 = 0xff; P1 = 0x80; j = 0; i = (i+1)%3; TR0 = 1; } void Show_Dot_Matrix() interrupt 1 { TH0 = (65535-2000)/256; TL0 = (65535-2000)%256; P1 = _crol_(P1,1); P0 = ~M[i][j]; j=(j+1)%8; }