8051 C Code for Serial Communication problem ?

[Qasim Khokhar]

if i never set TI=1 then this code not work in proteus. and if i set TI=1 than 8051 transmit parallel to receiving

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Code C - [expand]
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#include <reg51.h>
#include <stdio.h>
#include <lcd.h>
 
 
sbit RS = P2^1;
sbit EN = P2^0;
sbit WR1 = P2^2;
sbit D0 = P1^0;
sbit D1 = P1^1;
sbit D2 = P1^2;
sbit D3 = P1^3;
sbit D4 = P1^4;
sbit D5 = P1^5;
sbit D6 = P1^6;
sbit D7 = P1^7;
 
void Delay(int a)
{
  int j;
  int i;
  for(i=0;i<a;i++)
  {
    for(j=0;j<100;j++)
    {
    }
  }
}
void main()
{
 int i;
        char buf='\0';
        SCON  = 0x50;               /* SCON: mode 1, 8-bit UART, enable rcvr      */
    TMOD |= 0x20;               /* TMOD: timer 1, mode 2, 8-bit reload        */
    TH1   = 0x0E8;                /* TH1:  reload value for 1200 baud @ 16MHz   */
    TR1   = 1;                  /* TR1:  timer 1 run                          */
        IE=0x90;
[B]     RI=0;
    TI=1;
[/B]  WR1=0;
    Lcd8_Init();
    Lcd8_Set_Cursor(1,1);
    while(1){
        while((buf=getchar())==NULL);
    Lcd8_Write_Char(buf);
}
    while(1);   
}

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