[Moved]: 8051 using read signal strength from UART using sim 300

#include<reg51.h>
#include<string.h>
sbit rs=P1^0;
sbit rw=P1^1;
sbit en=P1^2;


void gsm_init();
void lcd_comm(int comm);
void delay(int del);
void lcd_data(char *da);
void uart_init();
void uart_init();
void uart_tx(char *tr);
void uart_rx();

int count;
char rx_data[15];
char s[15];

void main()
	{
	while(1)
		{
			if(count==0)
			{
				gsm_init();
				uart_init();
				lcd_comm(0x85);
				lcd_data("	welcome	");
				lcd_comm(0xC5);
				lcd_data("	Test index	");
				uart_tx("	AT\r\n	");
				delay(1);
				uart_tx("	AT+CSQ\r\n	");
				delay(1);

				[COLOR="#FF0000"]uart_rx();[/COLOR]		 // uart received

				delay(20);
				count=1;
				break;
			}
		}
	}


void gsm_init()
	{
		lcd_comm(0x38);
		lcd_comm(0x0c);
	}

void lcd_comm(int comm)
	{
		rs=0;
		rw=0;
		P2=comm;
		en=1;
		delay(1);
		en=0;
	}

void lcd_data(char *da)
	{
		rs=1;
		rw=0;
		while(*da)
		{
			P2=*da;
			en=1;
			delay(1);
			en=0;
			da++;
		}
	}

void delay(int del)   
	{
     int i,j;
     for(i=0;i<del;i++)
     	for(j=0;j<1275;j++);
	}

void uart_init()
	{
	    TMOD=0x20;
	    TH1=0XFD;
	    SCON=0x50;
	    TR1=1;  
	    TL1=1;
	}

void uart_tx(char *tr)
	{
		while(*tr)
		{
			SBUF=*tr;
		    while(TI==0); 
		    TI=0;                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           TI=0;
			tr++;
		}
	}

[COLOR="#FF0000"]void uart_rx()
	{
		int i;
		for(i=0;i<15;i++)
		{
		while(RI==0);
		rx_data[i]=SBUF; 
		RI=0;
		} 
				lcd_comm(0x01);
				lcd_comm(0x85);
				lcd_data(s);
				lcd_data("Sucess");
				lcd_comm(0xC5);
				delay(20);		
	}[/COLOR]