facing problem in serial port programming

[Shashiraj Shettyan M]

Hello everyone,

    I am trying to make "voice based home appliance control using microcontroller". I am using geetech voice recognition module and connected it to microcontroller through serial port (P3.0 & P3.1). I have loaded 5 voices into the voice recognition module. I have written the code also. But I am not able to get the output. I connected LED's at the output pins. I think there is something wrong in code. Please, can anyone rectify?

My code is,

#include <p89v51rx2.h>

#include<string.h>

sbit fan=P1^0;

sbit wrg=P1^1;

void delay(unsigned int it)

{

unsigned int i,j;

for(i=0;i<=it;i++);

for(j=0;j<1275;j++);

}

void init_serial()

{

SCON=0x50;

delay(2000);

TMOD=0x20;

delay(2000);

TH1=0xFD;

delay(2000);

TR1=1;

delay(1000);

}

unsigned char rec()

{

unsigned char a;

while(RI==0);

a=SBUF;

    delay(1000);

RI=0;

delay(1000);

return a;

}

void main()

{

  unsigned char cmd;

  fan=0;

  wrg=0;

  while(1)

  {

    init_serial();

    delay(20000);

    cmd=rec();

delay(20000);

switch(cmd)

{

 case 0x11: fan=1;                //command 1

            break;

 case 0x12: wrg=1; //command 2

            break;

 case 0x13: fan=1;                //command 3

            break;

 case 0x14: wrg=1; //command 4

            break;

 case 0x15: fan=1; //command 4

            break;

}

  }

}

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