io口模拟PWM设计呼吸灯

#include <SN8F5703.h>
#define uint unsigned int
void DELAY(uint t);
sbit KEY=P2^0;
sbit LED=P1^1;

void DELAY(uint t)
   {
	   while(--t);
	 }
	  
	 void main ()
{
  uint CYCLE=1000;
	uint PWM_LOW = 0;
	P0M=0xff;
	P1M=0xff;
	P0=0x00;
	while(1)
	{
  	LED=0;
		DELAY(1000);
		
		for(PWM_LOW =1; PWM_LOW < CYCLE; PWM_LOW++)//CYCLE-1000  -PWM_LOW 2-3-4-998//
		{
		  LED=0;
			DELAY(PWM_LOW);  //off++//
			
			LED=1;
			DELAY(CYCLE-PWM_LOW);  //LED_ON--//
			
			
		}
		  
			for(PWM_LOW=CYCLE-1; PWM_LOW>0;PWM_LOW--)
			{
			   LED=1;
			   DELAY(CYCLE-PWM_LOW);      //LED_On++//
				
			   LED=0;
			   DELAY(PWM_LOW);     //LED_Off--//
				
			}
		}
		
	}	

版权声明：本文为CSDN博主「lj2407727730」的原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/lj2407727730/article/details/122640880

#include <SN8F5703.h>
#define uint unsigned int
void DELAY(uint t);
sbit KEY=P2^0;
sbit LED=P1^1;

void DELAY(uint t)
   {
	   while(--t);
	 }
	  
	 void main ()
{
  uint CYCLE=1000;
	uint PWM_LOW = 0;
	P0M=0xff;
	P1M=0xff;
	P0=0x00;
	while(1)
	{
  	LED=0;
		DELAY(1000);
		
		for(PWM_LOW =1; PWM_LOW < CYCLE; PWM_LOW++)//CYCLE-1000  -PWM_LOW 2-3-4-998//
		{
		  LED=0;
			DELAY(PWM_LOW);  //off++//
			
			LED=1;
			DELAY(CYCLE-PWM_LOW);  //LED_ON--//
			
			
		}
		  
			for(PWM_LOW=CYCLE-1; PWM_LOW>0;PWM_LOW--)
			{
			   LED=1;
			   DELAY(CYCLE-PWM_LOW);      //LED_On++//
				
			   LED=0;
			   DELAY(PWM_LOW);     //LED_Off--//
				
			}
		}
		
	}	

版权声明：本文为CSDN博主「lj2407727730」的原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/lj2407727730/article/details/122640880