51单片机简单实现PWM控制步进单机和GT-38无线通讯

       关于PWM控制原理这里不做赘述，在小项目中有时会离不开通信，便宜使用的GT-38短距离无线通讯模块深受大家喜爱，下面来介绍有关GT-38模块应用

需要准备的：

1两个GT-38模块，一个TTL接口（485，232通讯），一台主机用来接收发送数据

GT38模样

代码我已经写好

/*CSDN博主：吃小朋友的大坏蛋*/
#include <reg52.h>			
#include <stdio.h>
#define uchar unsigned char
#define uint unsigned int
#define lint long int
sfr WDT_CONTR=0xe1;                       
lint PWM_COUNT1;    
lint PWM_COUNT2;    
lint HUXI_COUNT1;    
lint HUXI_COUNT2;   
lint PWM_VLAUE1;   
lint PWM_VLAUE2;    
lint COUNTB;              
bit direc_flag1;             
bit direc_flag2;
sbit open=P1^0;				
sbit stop=P1^1;				
sbit speed=P1^2;		
sbit slow=P1^3;	
sbit d1=P1^0;				
sbit d2=P1^1;				
uint flag,A;			   
float sudu,pysd;             
/********************************************************************/
void timer0()                
{
    TMOD=0x02; 
    TH0=0x38;   
    TL0=0X38;										
    TR0=1;                  
    ET0=1;                  
	WDT_CONTR=0x35;			
}
void timer1()			   
{	
	TMOD=0x20;          
    TH1=0xfd;                
    TL1=0Xfd;			
    TR1=1;                  
	SM0=0;				
	SM1=1;
	REN=1;             
}
void delay(uchar z)					
{
	uchar x,y;
	for(x=z;x>0;x--)
	for(y=110;y>0;y--);
}
void Delay2500ms()		
{
	unsigned char i, j, k;


	i = 114;
	j = 255;
	k = 107;
	do
	{
		do
		{
			while (--k);
		} while (--j);
	} while (--i);
}
/*********************************************************************/
void init()        
{
	EA=0;
	ES=1;				
	HUXI_COUNT1 = 0;
	HUXI_COUNT2 = 0;
    PWM_COUNT1 = 0;
	PWM_COUNT2 = 0;
	
    PWM_VLAUE1 = 1000;			 
	PWM_VLAUE2 = 1000;
    direc_flag1 = 0;
	direc_flag2 = 0;
	WDT_CONTR=0x35;			
}
/**********************************************************************/
/*                  
key2=P3^4;				
key3=P3^5;				
key4=P3^6;				
key5=P3^7;				
*/
void control()
{
if(open==0)
{
	delay(5);
	if(open==0)
	{		 
	EA=1;        
	}
	while(!open);			
	delay(1);			  
	while(!open);
}

if(stop==0)
{
	delay(5);
	if(stop==0)
	{ WDT_CONTR=0x35;			
	 EA=0;       
	 d1=0;
	 d2=0;
	}
	while(!stop);			 
	delay(1);			  
	while(!stop);
}

if(speed==0)				
{
	delay(5);
	if(speed==0)
	{if(PWM_VLAUE1>0)					
	PWM_VLAUE1=PWM_VLAUE1-50;
	else
	PWM_VLAUE1=0;

	if(PWM_VLAUE2>0)
	PWM_VLAUE2=PWM_VLAUE2-100;
	else
	PWM_VLAUE2=0;
	}
	while(!speed);		
	delay(1);			  
	while(!speed);
}

if(slow==0)							
{
	delay(5);
	if(slow==0)
	{if(PWM_VLAUE1<1000)				
	PWM_VLAUE1=PWM_VLAUE1+50;
	else
	PWM_VLAUE1=1000;

	if(PWM_VLAUE2<1000)
	PWM_VLAUE2=PWM_VLAUE2+100;
	else
	PWM_VLAUE2=1000;
	}
	while(!slow);			
	delay(1);			  
	while(!slow);
}
}
/***************sudu,pysu*****************/
void counter()               
{	int r=2;													
	float sudu,f1,f2,*c,*m,pysd;        
	f1=1-PWM_VLAUE1/1000;
	f2=1-PWM_VLAUE2/1000;
	sudu=f1*60/r;
	pysd=f2*60/r;
	c=&sudu;   
	m=&pysd;
}
/***************???????*******************/
void gt38()
{	float *c,*m;
 if(flag==1)
	{	ES=0;
		flag=0;
		SBUF=*c;
		while(!TI);
		TI=0;
		ES=1;
		SBUF='a';
		while(!TI);
		TI=0;
		ES=1;
		SBUF='n';
		while(!TI);
		TI=0;
		ES=1;
		while(!TI);
		TI=0;
		ES=1;
		SBUF='d';
		while(!TI);
		TI=0;
		ES=1;
		SBUF=*m;
		while(!TI);
		TI=0;
		ES=1;
		WDT_CONTR=0x35;			
	}
}
/*********************************************/
/***************************************************/
void main()
{	
	init();
	timer0();
	timer1();
	while(1)
{
control();
counter();
gt38();		   
 WDT_CONTR=0x35;			
}
}
/***********************************************************************/
void time0()interrupt 1			 
{	
	PWM_COUNT1++;
    HUXI_COUNT1++;
    if(PWM_COUNT1 == PWM_VLAUE1)      
  		d1=1;							
    if(PWM_COUNT1 == 1000)             
    {
        d1=0;                    
        PWM_COUNT1 = 0;            
    }
			if((HUXI_COUNT1==5000) && (direc_flag1 == 0))	
		    {                               
		        HUXI_COUNT1=0;
		        PWM_VLAUE1=PWM_VLAUE1-100;
				while(PWM_VLAUE1==500)														//**********************************************//
		   {direc_flag1=1;}            
		    }

	PWM_COUNT2++;
    HUXI_COUNT2++;
    if(PWM_COUNT2 == PWM_VLAUE2)     
  		d1=1;						
    if(PWM_COUNT2 == 1000)             
    {
        d1=0;                    
        PWM_COUNT2 = 0;          
    }
	if((HUXI_COUNT2==5000) && (direc_flag2 == 0))	  
		    {                               
		        HUXI_COUNT2=0;
		        PWM_VLAUE2=PWM_VLAUE2-200;
				while(PWM_VLAUE1==400)														  //********************************************//
		   {direc_flag2=1;}            
		    }
}
/*********************************************/
void es() interrupt 4				
{	
	RI=0;
	scanf("%s=SBUF","Hi Tom date");
	flag=1;												       
}