Retrieving UART data on LCD using PIC16F877A

First of all… thanks for your response sir.

As i tested the code with the hyperterminal…i could see the AT command printed on the terminal and as i press a key on the keyboard that gets printed on the lcd screan… so serial comm is of no problem.but when i interface pic with the gsm module. instead of getting OK i getback same command what i send(AT) on the lcd screan. suggestions pls.

I have disabled the echo feature using ATE0 command and have put the gsm module permanently on the text mode using AT+CMGF=1;&W , and now i get the garbage character on the lcd display, when i tried the code with the hyperterminal, i got the same garbage value but once i create an interrupt by pressing a key on keyboard that gets printed on lcd, but when i interface the controller with the gsm module, the same garbage value is printed repeatedly… i have done a code to receive a one character first… so here is the code…and i tried with the electrosome ‘s udf’s this time

do
{
  UART_Write_Text("AT");
  UART_Write(0x0D);   //CR.
  UART_Write(0x0A);   //NEW LINE.
  
  delay(2000);

  if(UART_Data_Ready())
  {
    /*if(OERR)
    {
      CREN = 0;
      CREN = 1;
    }*/
    x[0]=UART_Read();
    RCREG=0;
  }
  Lcd4_Clear();
  Lcd4_Set_Cursor(1,4);
  lcd4_putch(x[0]);
  delay(500);
  Lcd4_Clear();
}while(1);
/*UDF*/
char UART_Data_Ready()
{
  return RCIF;
}

char UART_Read()
{
  while(!RCIF);
  return RCREG;
}

Hi sir,

As i copy data from RCREG to an array, i tried to convert the data to an ascii by adding 0x30 and 0x40 and print it on lcd. but i get

random alphabets and symbols which doesnt match with what i get it on hyperterminal.is that due to baud rate???

code used:

Lcd4_Clear();
Lcd4_Set_Cursor(1,0);
lcd4_putch((x[0]+0x30));  // if its giving unknown char ,add 0x40 to x[0] and try(HEX to ascii)
lcd4_putch((x[1]+0x30));
lcd4_putch((x[2]+0x30));
lcd4_putch((x[3]+0x30));

Hi sir,

i also have the same doubt sir but printing without converting gives me an undefined symbols…and i get alphabets only

once i convert using 0x30,but which are not the one i get on hyperterminal… should i check on baud rates???

sorry sir, my mistake… finally i got what required… no conversion was needed to display data from gsm on lcd. i got what exactly i got on hyperterminal now…
but as per the code below… loop is not getting repeated continuosly. i just mentioning last three bits for reference..

while(1)
{
  UART_Write_Text("AT+CMGR=1");
  UART_Write(0x0D);
  UART_Write(0x0A);

  for(i=0;i<67;i++)
  {
    x[i]=UART_Read();
  }

  Lcd4_Clear();
  Lcd4_Set_Cursor(1,1);
  lcd4_putch(x[63]);  // data corresponding bit
  lcd4_putch(x[64]);
  lcd4_putch(x[65]);
}