流水燈實現

實現1:位移+取反實現

點選檢視程式碼

#include <stc89c5xrc.h>
#define u16 unsigned int
#define u8 unsigned char
void delay(u16 c)
{
	u16 a,b;
	for(a=c;a>0;a--)
		for(b=115;b>0;b--);
}
void main()
{
	u8 i=0;
	while(1)
	{
		 for(i=0;i<8;i++)
		 {
			P1=~(0X01<<i);
			delay(100);
		 }
	}
}

實現2：呼叫庫函式_crol_和_cror_

點選檢視程式碼

#include <stc89c5xrc.h>
#include <intrins.h>
#define u16 unsigned int
#define u8 unsigned char
void delay(u16 c)
{
	u16 a,b;
	for(a=c;a>0;a--)
		for(b=115;b>0;b--);
}
void main()
{
	u8 i=0;
	P1=0XFE;
	while(1)
	{
		 for(i=0;i<7;i++)
		 {
			P1=_crol_(P1,1);//left move one bit
			delay(300);
		 }
		 
		 for(i=0;i<7;i++)
		 {
			P1=_cror_(P1,1);//right move one bit
			delay(300);
		 }
	}
}

實現3：透過陣列實現

點選檢視程式碼

#include <stc89c5xrc.h>
#include <intrins.h>
#define u16 unsigned int
#define u8 unsigned char
u8 code led[8]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};
void delay(u16 c)
{
	u16 a,b;
	for(a=c;a>0;a--)
		for(b=115;b>0;b--);
}
void main()
{
	u8 i=0;
	P1=0XFE;
	while(1)
	{
		 for(i=0;i<8;i++)
		 {
			 P1=led[i];
			 delay(300);
		 }
		 
	}
}