16个led的51单片机跑马灯

ID:239476 · 发表于 2017-10-14 20:40

代码
#include <reg51.h>
void time(unsigned int ucMs);//函数声明
void main(void)
{
unsigned char  ucTimes;
#define DELAY_TIME 450
  while(1)
{
P1=0xff;
P0=0xff;
for(ucTimes=0;ucTimes<8;ucTimes++){
P0 = P0 - (0x01<<ucTimes);time(DELAY_TIME);}
for(ucTimes=0;ucTimes<8;ucTimes++){
P1 = P1 - (0x01<<ucTimes);time(DELAY_TIME);}
P1=0xff;
P0=0xff;
for(ucTimes=0;ucTimes<8;ucTimes++){
P1 = P1 - (0x80>>ucTimes);time(DELAY_TIME);}
for(ucTimes=0;ucTimes<8;ucTimes++){
P0 = P0 - (0x80>>ucTimes);time(DELAY_TIME);}
}}
void time(unsigned int ucMs)
{
#define DELAYTIMES 239
unsigned char ucCounter;
while(ucMs!=0) {
  for(ucCounter=0; ucCounter<DELAYTIMES; ucCounter++) { }
  ucMs--;
  }
}

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