這是這幾天來(lái)做的基于51單片機(jī)PWM調(diào)速的藍(lán)牙小車代碼，希望能幫到需要的人

ID:336097 · 發(fā)表于 2018-5-22 22:13

#include <reg52.h>
#define uchar unsigned char
#define uint unsigned int
/////////////////////////////////////
uchar n='0',num0=0,num1=0;
char zuo_pwm=35,you_pwm=35 ;
sbit zuo1=P0^0;//in1
sbit zuo2=P0^1;//in2
sbit you1=P0^2;
sbit you2=P0^3;
sbit ENA=P0^4;
sbit ENB=P0^5;

//*-*-*-*
/* 函數(shù)功能:設(shè)置串口*/
void init()    //time0
{
TMOD=0x21;
SCON=0x50;

TMOD &= 0xF0; //設(shè)置定時(shí)器模式
TMOD |= 0x01; //設(shè)置定時(shí)器模式

TL0 = 0x91; //設(shè)置定時(shí)初值
TH0 = 0xFF; //設(shè)置定時(shí)初值

TH1=0xfd;
TL1=0xfd;
EA=1;    //打開(kāi)總中斷
ET0=1; //打開(kāi)定時(shí)器0中斷允許
TR1=1;    //定時(shí)器1開(kāi)始計(jì)時(shí)
TR0=1;    //定時(shí)器0開(kāi)始計(jì)時(shí)
ES=1;    //打開(kāi)接收中斷
}

//*-*+*-+-+-
//**********************
void qian ()
{
zuo_pwm=17;
you_pwm=17;
zuo1=1;
zuo2=0;
you1=1;
you2=0;
}
void jiansu ()    //智能燈熄滅
{
zuo_pwm=8;
you_pwm=8;
zuo1=1;
zuo2=0;
you1=1;
you2=0;
// zuo1=0;
// zuo2=0;
// you1=0;
// you2=0;
//zuo_pwm=0;
//you_pwm=0;
}
void jiasu ()
{
zuo_pwm=35;
you_pwm=35;
zuo1=1;
zuo2=0;
you1=1;
you2=0;
}
void hou () //智能燈1/3亮度
{

zuo_pwm=17;
you_pwm=17;
zuo1=0;
zuo2=1;
you1=0;
you2=1;
}
void turnleft ()          //智能燈2/3亮度
{
zuo_pwm = 13;
you_pwm = 16;
zuo1=1;
zuo2=0;
you1=1;
you2=0;
}
void turnright ()
{
zuo_pwm = 16;
you_pwm = 13;
zuo1=1;
zuo2=0;
you1=1;
you2=0;
}
void stop ()
{
zuo1=0;
zuo2=0;
you1=0;
you2=0;
}
void zhuandong ()
{
zuo_pwm=35;
you_pwm=35;
zuo1=1;
zuo2=0;
you1=0;
you2=1;
}
void zhuandong_jian ()
{
zuo_pwm=12;
you_pwm=12;
zuo1=1;
zuo2=0;
you1=0;
you2=1;
}
void main ()
{
init ();                                     //初始化

while (1)
{


{
   switch (n)                      //藍(lán)牙控制
{
case '2':qian (); break;
case '3':jiansu (); break;
case '4':jiasu (); break;
case '5':hou ();    break;
case '6':turnleft (); break;
case '7':turnright (); break;
case '8':zhuandong ();  break;
case '9':zhuandong_jian (); break;
case '0':stop (); break;
default:break;
}
}
}
}
//*-*-*-*
/* 函數(shù)功能:設(shè)置串口*/
void UART_SER()interrupt 4
{
if (RI)
{
RI=0;
n=SBUF;
TI=1;
SBUF=n;
}
if (TI)
TI=0;
}

//定時(shí)器0中斷函數(shù)
void Timer1Interrupt(void) interrupt 1
{

TL0 = 0x91; //設(shè)置定時(shí)初值
TH0 = 0xFF; //設(shè)置定時(shí)初值
//PWM調(diào)占空比
num0++;
num0++;
      num1++;
      if(num0<=zuo_pwm)
      {ENA=1;}
      else
         ENA=0;
            if(num0==40)
            {
            ENA=~ENA;
            num0=0;
            }
            if(num1<=you_pwm)
            {
            ENB=1;
            }
            else
            ENB=0;
               if(num1==40)
            {ENB=~ENB;num1=0;}
}