[提问帖]用51单片机像蓝牙模块发AT指令蓝牙模块没反应

insect50 · 发表于 2013-6-19 19:40:07

用51单片机像蓝牙模块发AT指令蓝牙模块没反应
本来会返回“OK”的
用电脑发可以收到返回

付程序：

#include <reg52.h>

#define uchar unsigned char

#define uint unsigned int

uchar a[4]={0,0,0,0},i;

void delay(uint a)

{

uint b,c;

for(b=a;b>0;b--)

for(c=110;c>0;c--);

}

void main()

{

TMOD=0x20;

TH1=0xfd;

TH2=0xfd;

TR1=1;

REN=1;

SM0=0;

SM1=1;

EA=1;

delay(100);

ES=1;

i=0;

SBUF='A';

while(!TI);

TI=0;

SBUF='T';

while(!TI);

TI=0;

SBUF='\r';

while(!TI);

TI=0;

SBUF='\n';

while(!TI);

TI=0;

delay(3000);

if(a[0]=='O'&&a[1]=='K')

{

P1=0;

i=0;

}

while(1);

}

void ab() interrupt 4

{

if(RI)

{

a=SBUF;

i++;

RI=0;

}

}

————————————————————————————————————————
附上调试好的代码

#include <reg52.h>

#define uchar unsigned char

#define uint unsigned int

#define TZ P1=0;

sbit p1_0=P1^0;

sbit p1_1=P1^1;

sbit p1_2=P1^2;

sbit p1_3=P1^3;

bit time=0;

char direc=-1;

void ting()

{

p1_0=1;

p1_1=1;

p1_2=1;

p1_3=1;

}

void qian()

{

p1_0=1;

p1_1=0;

p1_2=1;

p1_3=0;

}

void hou()

{

p1_0=0;

p1_1=1;

p1_2=0;

p1_3=1;

}

void zuo()

{

p1_0=1;

p1_1=0;

p1_2=0;

p1_3=1;

}

void you()

{

p1_0=0;

p1_1=1;

p1_2=1;

p1_3=0;

}

void zuo1()

{

p1_0=1;

p1_1=0;

p1_2=1;

p1_3=1;;

}

void you1()

{

p1_0=1;

p1_1=1;

p1_2=1;

p1_3=0;

}

void zuo2()

{

p1_0=0;

p1_1=1;

p1_2=1;

p1_3=1;

}

void you2()

{

p1_0=1;

p1_1=1;

p1_2=0;

p1_3=1;

}

void delay(uint a)

{

uint b,c;

for(b=a;b>0;b--)

for(c=110;c>0;c--);

}

void main()

{

TMOD=0x20;

TH1=0xfd;

TL1=0xfd;

TR1=1; // T1

REN=1;

SM0=0;

SM1=1; //串口

EA=1; //中断

ES=1;

delay(1000);

while(1)

{

if(time)

{

ting();

delay(500);

direc=-1;

time=0;

}

else

switch (direc)

{

case -1: ting(); break;

case 0: you2(); break;

case 1: you1(); break;

case 2: zuo2(); break;

case 3: zuo1(); break;

case 4:

case 9: qian(); break;

case 5:

case 10: hou(); break;

case 6:

case 11: zuo(); break;

case 7:

case 12: you(); break;

}

}

}

void ab() interrupt 4

{

char sbuf;

sbuf=SBUF;

if(direc>7)

{

if(direc==8)

switch (sbuf)

{

case 'f': direc+=1;break;

case 'b': direc+=2; break;

case 'l': direc+=3; break;

case 'r': direc+=4; break;

}

else if(sbuf=='0')

direc-=5;

}

else

{

switch (sbuf)

{

case '0': break;

case '1': direc=8; break;

case 'f': direc=1; break;

case 'b': direc=0; break;

case 'l': direc+=2; break;

case 'r': direc+=0; break;

case 's': direc=-1; break;

default :time=1;

}

}

RI=0;

}