[SOLVED] help on serial programming with 8051. i got black box character.. :)

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void serial_init()
{
  TMOD = 0x20;  //enable timer1 / mode 2 / 8-bit auto-reload
  SCON = 0x50;  //Serial port mode bit 1 / 8 bit. / Receiver Enable.
  TH1  = 0xFD;  // generate 9600 baudrate
  TL1  = 0xFD;
  TR1  = 1;     //start timer 1
}
 
 
void serial_send(unsigned char dat)
{
 SBUF = dat;                        // Store data in sbuf
 while(TI==0);                          // Wait till data transmit
 TI=0;  
}

Code ASP - [expand]
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void main()
{
  serial_init();
  serial_send('r');
  while(1);
}

Code C - [expand]
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#include <REG51.H>
 
unsigned char recve;
 
void serial_init()
{
  TMOD = 0x20;  //enable timer1 / mode 2 / 8-bit auto-reload
  SCON = 0x50;  //Serial port mode bit 1 / 8 bit. / Receiver Enable.
  TH1  = 0xFD;  // generate 9600 baudrate
  TR1  = 1;     //start timer 1
}
 
 
void serial_send(unsigned char send)
{
  SBUF = send;
  while(TI==0);
  TI = 0;
}
 
void serial_read()
{
  while(RI==0);
  recve = SBUF;
  RI=0;
 
}
 
 
 
void main()
{
   
   P2 = 0x00;
   serial_init();
   
   while(1)
   {
     serial_read();
 
     if(recve == 'y')  
     P2 = 0x03;       // turn on output when y is received
     else
     {
       P2=0x00;
       serial_send('k');   //transmit K to serial when recieved is not y
     }
   }
 
}

Code C - [expand]
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void serial_sendstr(unsigned char *p)
{
  while(*p!='\0')
  serial_send(*p++);
}

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#include <stdio.h>
#include <string.h>
 
int search(char *p[], char *name);
char *names[] = {"John","Jim","Jane","James","romel",NULL};
 
 
 
int main()
{
   char s1 [] = "ako si batman pangit";
   char s2 [] = "hi Im romel gwapo";
 
   char s3 [] = "ako ay gwapo kaayo";
   char s4 [] = "gwapo kaayo";
 
 
//start from the first occurence of the string
   printf ("\n1.%s", strstr (s1,"si"));
//start from the first occurence of the string
 
 
//searches string from s3 to s4 ///
   if(strstr(s3, s4) != NULL)    //searches string from s3 to s4
   printf("\n2.String found: %s\n \n \n \n",s4);
 
   else
   printf("\n1.String NOT found \n \n \n \n");
//END searches string from s3 to s4 ///
 
 
//search string inside pointer array
   if(search(names, "romel") != -1)
    printf("3.in list \n \n");
   else
    printf("not in the list \n \n");
//end search string inside pointer array
 
 
 
}
 
//search string inside pointer array function
int search(char *p[], char *name)
{
  int t;
 
  for(t=0; p[t]; ++t){
    if(!strcmp(p[t], name))
    {
       return t;
    }
  }
    return -1; /* not found */
}
//search string inside pointer array function