TIMER0控制四只LED滚动闪烁51单片机PROTEUS仿真-29.rar

#include <reg52.h> #define uchar unsigned char #define uint unsigned int sbit B1 = P0^0; sbit G1 = P0^1; sbit R1 = P0^2; sbit Y1 = P0^3; uint i,j,k; void main() { i=j=k=0; P0 = 0xff; TMOD = 0x02; TH0 = 256-200; TL0 = 256-200; IE = 0x82; TR0 = 1; while(1); } void LED_Flash_and_Scroll() interrupt 1 { if(++k<35) return; k = 0; switch(i) { case 0:B1=!B1;break; case 1:G1=!G1;break; case 2:R1=!R1;break; case 3:Y1=!Y1;break; default: i=0; } if(++j<300) return; j = 0; P0 = 0xff; i++; }