原创 闪烁灯的源程序

C51源代码：

/*闪烁灯程序*/

#include<reg51.h>

void delay()

{

    unsigned char i,j,k;

    for(i=0;i<=20;i++)

        for(j=0;j<=100;j++)

            for(k=0;k<=248;k++);

}

int main()

{

    unsigned char led;

    led="0xff";

    do

    {

        P0=led;

        delay();

        P0=~led;

        delay();

    }

    while(1);

}

汇编源代码：

;闪烁灯程序

              ORG 0000H

              AJMP START

              ORG 30H

START: MOV A,#0FFH

              MOV P0,A

             ACALL DELAY

             CPL A

             MOV P0,A

             ACALL DELAY

             AJMP START

DELAY:MOV R7,#20

DEL1:   MOV R6,#100

DEL2:    MOV R5,#248

              DJNZ R5,$

             DJNZ R6,DEL2

             DJNZ R7,DEL1

             RET

             END