Trouble In Displaying Massege On Lcd

Asked by navin kumar Mail itsmenk9831@gmail.com Location
Hardware: AT89S52, GSM (SIM900) Software: C PROGRAM IN KIEL
I AM WORKING ON GSM BASED E-NOTICE BOARD USING AT89S52.
WHEN I SEND MESSAGE THEN LCD DOES NOT DISPLAY THE MESSAGE

CAN U PLEASE PROVIDES THE CODES FOR THIS
Images

Program

#include<reg51.h>
#include<string.h>
#include<absacc.h>
#include<stdlib.h>
#include<ctype.h>
#define buffer 110
					
sbit rs = P3^5;
sbit e = P3^4;

void display_msg();
void delay(unsigned int i);
void lcdstr(unsigned char *s);
void lcdcmd(unsigned char val);
void lcddata(unsigned char val);
void lcdinit();
void tx0(unsigned char);
void SMSString(unsigned char*text) ;
void init();
void clear(void);
void read_notification();
void clear_mybuff();
void delete_msg(void); 
void read_no(unsigned char msg_array[]);
void store_msg(unsigned char msg_array[]);
void password();
void read_nd_check_password(unsigned char msg_array[]);
unsigned char abc,apt=0,count=0;
unsigned char idata msg1[buffer];
unsigned char rec_no[10];
unsigned char time_date[10];
unsigned char code Response[] = "+CMTI";
// Moblie no.of Owner
unsigned char code Mob_no[]= ""; 
unsigned char code Pass_array[]="1234";
unsigned char MyBuff[20], k = 0;
bit flag1=0;
unsigned char store[10];
bit NewMessage = 0;
bit TI_flag = 0;
bit flag=0;
bit No_correct=0;

void lcdstr(unsigned char *s)
{
 unsigned int l,i;
 l = strlen(s);               // get the length of string
 for(i=1;i<=l;i++)
 {
  lcddata(*s);              // write every char one by one
  s++;  
 }
}
void lcdcmd(unsigned char val)
{      
     
        P1=val;
        rs=0;
        e=1;
        delay(1);
        e=0;
        return;
}

void delay(unsigned int i)
{
        unsigned int k, l;
        for(k=0;k<i;k++)
                for(l=0;l<1000;l++);
}
void lcddata(unsigned char val)
{
             
                P1=val;  
                rs=1;
                e=1;
                delay(1);
                e=0;
              return;
}
         

void lcdinit()
{
    lcdcmd(0x38); // 2 lines 5x7 matrix.
    delay(5);
    lcdcmd(0x0c); // Display ON Cursor Blinking.
    delay(5);
    lcdcmd(0x01); // Clear Display Screen.
    delay(5);
    lcdcmd(0x06); // Increment Cursor.
    delay(5);
   
}

void main ()
{

//if u do not want to check "OK" response after each AT command then
//enable interrupt IE=0X90 ; after last AT command of  
//SMSString( "AT+CMGR=1r"); // AT command to read sms
//so after that u recieve a no of bytes from modile if u disable it then u do not reieve
//it even data comes
//	unsigned char t;
  
	clear();
	lcdinit();
	lcdcmd(0x80);
	lcdstr("Welcome to GSM");
	lcdcmd(0xc0);
	lcdstr("based Noticeboard");

	delay(10);
	init();
IT0 = 1;   // Configure interrupt 0 for falling edge on /INT0 (P3.2)
SMSString("ATr"); // AT commands to initialize gsm modem
delay(50);

SMSString( "ATe0r"); // turn off echo
delay(50);

SMSString( "AT&Wr"); // save settings
delay(50);

SMSString( "AT+CMGF=1r"); // select text mode for sms
delay(50);
  
SMSString( "AT+CNMI=2,1,0,0,0r"); // notification of new sms
while(1)
{
 
IE=0x91;
k=0;
delay(10);
flag=0;
while(!NewMessage);
{
	IE=0X00;
	delay(10);
	NewMessage = 0;
	read_notification(); 
}
//New msg indication.
// +CMTI: "SM",3 
}

}
void read_notification()
{  
	lcdcmd(0x01); //Clear LCD display.
	clear();
	SMSString("AT+CMGR=");
    tx0(MyBuff[12]);
    SMSString("r"); 		
    IE=0x90;
    delay(200);
	read_no(msg1);
	IE=0x00;
	if(No_correct==1)
	{
	
		lcdcmd(0x80);
		lcdstr("Message Received");
		if(!isalpha(msg1[59]))	// checks for received msg is password or a actual msg(data).
		{
			read_nd_check_password(msg1);
		
		}
		else
			{
    			store_msg(msg1);
				password();
				flag1=1;
			}
	}
	else
	{
		lcdcmd(0x01);
		lcdcmd(0x80);
		lcdstr("Msg frm Unknown");
		delay(1);
	}
	clear();

if(MyBuff[12]>='9')	//After 9 msgs recieved it clears the Msg index from SIM
{
	delete_msg();
}

clear_mybuff();

return;
}

void read_nd_check_password(unsigned char msg_array[])
{
if(Pass_array[0]==msg_array[59]&&
	Pass_array[1]== msg_array[60]&&
	Pass_array[2]==msg_array[61]&&
	Pass_array[3]== msg_array[62])
	{
		display_msg();
	}
	else
	{	
	SMSString("AT+CMGS="");
	SMSString(Mob_no);
	SMSString(""r");
	delay(1);
	SMSString("Password Incorrect!!");
	tx0(0x1A); // Ctrl+z
	delay(10);	
	}
return;
}
void password()
{
	SMSString("AT+CMGS="");
	SMSString(Mob_no);
	SMSString(""r");
	delay(1);
	SMSString("Send Your 4 Digit Password");
	tx0(0x1A); // Ctrl+z
	delay(10);	
return;
	}

void store_msg(unsigned char msg_array[])
{
unsigned char i,j;
i=59;
j=0;
	while(msg_array[i]!='r')
	{
	 	store[j]= msg_array[i];
		i++;
		j++;
	}
return;
}

void display_msg()
{
	lcdcmd(0x01);
	lcdcmd(0x80);
	lcdstr("Received Msg");
	delay(1);
	lcdcmd(0xc0);
	lcdstr(store);
return;
}
void delete_msg(void)
{
	SMSString("AT+CMGD=9r");
	delay(1);
	SMSString("AT+CMGD=8r");
	delay(1);
	SMSString("AT+CMGD=7r");
	delay(1);
	SMSString("AT+CMGD=6r");
	delay(1);
	SMSString("AT+CMGD=5r");
	delay(1);
	SMSString("AT+CMGD=4r");
	delay(1);
	SMSString("AT+CMGD=3r");
	delay(1);
	SMSString("AT+CMGD=2r");
	delay(1);
	SMSString("AT+CMGD=1r");
	delay(1);
	return;
}

void init()
{
P0=0x00;
	abc=0;
	TL1=0XFD; //9600 @ 11.0592
	TH1=0xFD;
	TMOD=0x20;
	SCON=0x50;
	TR1=1;
}
void SMSString(unsigned char* text) //function to send SMS using GSM modem
{
	while (*text)
	{
		tx0(*text++);
	}
} 
void tx0(unsigned char x) //send data to serial port 0
{
	EA=0;
	SBUF=x;
	while(TI==0);
	TI=0;
	EA=1;
}
void serial () interrupt 4 {
unsigned char ch;
	if(RI){
      ch = SBUF; //character is read
      RI = 0; //clear flag
      if((ch == Response[k]) || (k > 4))
	  {
           if(ch != 0x0D) // 0x0D means data received..
		   { 
           	  MyBuff[k++] = ch;
           }
		   else
		   {
           		MyBuff[k] = '';
            	NewMessage = 1;
                k = 0; 
            }
       }	   
	   	else 
	   	{
			msg1[abc]=ch;//received msg is stored.
			abc++;
       		k = 0;
       	}
       } 
}

void clear_mybuff()
{
	unsigned int a;
	for(a=0;a<25;a++)
		MyBuff[a]=0x00;
}
void clear(void)
{
	unsigned int a;
	for(a=0;a<buffer;a++)
		msg1[a]=0x00;
		abc=0;
}

void read_no(unsigned char msg_array[])	  // reads the no from received msg and compares it with stored msg, If found wrong then send a msg to owner.
{
unsigned char i;
	if(Mob_no[0]==msg_array[23]&&
	Mob_no[1]== msg_array[24]&&
	Mob_no[2]==msg_array[25]&&
	Mob_no[3]== msg_array[26]&&
	Mob_no[4]==msg_array[27]&&
	Mob_no[5]== msg_array[28]&&
	Mob_no[6]==msg_array[29]&&
	Mob_no[7]== msg_array[30]&&
	Mob_no[8]==msg_array[31]&&
	Mob_no[9]== msg_array[32])
	{
		No_correct=1;
	}
	else	// Sends a msg to stored no if some unauthoriesd tries to send a msg.
	{
	 		No_correct=0;
			SMSString("AT+CMGS="");
			SMSString(Mob_no);
			SMSString(""r");
			delay(1);
			SMSString("Msg from Unknown number:( ");
			for(i=23;i<=32;i++)
			{
			tx0(msg_array[i]);
			delay(0);
			}
			SMSString(") is received.");
				tx0(0x1A); // Ctrl+z
			delay(100);	
	}
return;
}