89C52蓝牙小车程序（PWM调速）

#include <reg51.h>
#define uint unsigned int
#define uchar unsigned char
sbit in1=P0^0;
sbit in2=P0^1;
sbit in3=P0^2;
sbit in4=P0^3;
sbit ina=P0^4;
sbit inb=P0^5;
uchar tmp,w=50,sudu;                      
void init()        //串口初始化
{                                                                       //关中断
    SCON =0x50;                        
    TMOD =0x20;
    PCON=0x00;
    TH1=0xfd;
    TL1=0xfd;
    TH0=0xff;
    TH0=0x17; 
    EA=1;
    ES=1;
    ET0=1; // T0中断允许
    TR0=1; // 启动T0定时器
    TR1=1; // 启动T1定时器                       
    P1=0x00;

}


void ctrl()                      //接收处理函数