hi guys this is my 1st post in this forum !!
I need send data between pc and pic so i made this schematic using proteus wrote the very simple ccs c code for pic 18f2550

#include<18f2550.h> 
#fuses NOWDT,HS,NOPROTECT,NOLVP 
#use delay(clock=20000000)
 #use rs232(baud=9600,xmit=PIN_C6,rcv=PIN_C7,INVERT,parity=N,bits=8)   
void main() 
{     char a;
    printf("Start typing ...\n.");
    while(1)   
{
  a=getc(); 
        putc(a);   

}    
}

and my schematic is goto http://obrazki.elektroda.pl/2276196000_1388233204.jpg
and when i run the code the result is like this http://obrazki.elektroda.pl/6774018100_1388233383.jpg

so friend before this i used exsisr.c with little change

#if defined(__PCM__)
#include <16F877.h>
#fuses HS,NOWDT,NOPROTECT,NOLVP 
#use delay(clock=20000000)
#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7)   

#elif defined(__PCH__) 
#include <18F2550.h> 
#fuses HS,NOWDT,NOPROTECT,NOLVP
#use delay(clock=20000000)
#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7,ERRORS,INVERT)   

#elif defined(__PCD__) 
#include <30F2010.h> 
#fuses HS, NOWDT, NOPROTECT 
#use delay(clock=20000000)
#use rs232(baud=9600, UART1A)
#endif     
#define BUFFER_SIZE 32 
 
 BYTE buffer[BUFFER_SIZE];
 BYTE next_in = 0; 
 BYTE next_out = 0;

#int_rda 

void serial_isr()
 {    int t;

 buffer[next_in]=getc();    
 t=next_in;
 next_in=(next_in+1) % BUFFER_SIZE;    
 if(next_in==next_out)      
 next_in=t;           // Buffer full !! 
 
 }

#define bkbhit (next_in!=next_out)   

BYTE bgetc() 
{
BYTE c;
while(!bkbhit) ;
c=buffer[next_out];
next_out=(next_out+1) % BUFFER_SIZE;    
return(c);
}


 void main() 
{       enable_interrupts(int_rda);
   #if defined(__PCD__)    
   enable_interrupts(intr_global);    
   #else
   enable_interrupts(global);
   #endif
  printf("\r\n\Running...\r\n"); 
                 

// The program will delay for 10 seconds and then display                // any data that came in during the 10 second delay 
     do 
{       delay_ms(10000);       
  printf("\r\nBuffered data => ");
 while(bkbhit)
 putc( bgetc() );
 } while (TRUE); 
}

so proteus result for this is http://obrazki.elektroda.pl/5680434400_1388234039.jpg

SO in the both above cases i clicked on rx vir: terminal pressed keyboard buttons but they(the characters i pressed) did not appear in output terminal
if i say clearly in first case (according to my little code) i pressed keys buttons but output is like in image ("start typing" then nothing..)
in second case the long code i keep pressing keys for 10s but output like the image i added ( bufferd data..bufferd data.. as in there)

And also i Used hyperterminal with virtual serial port software in second experiment but same results came as in image..
I'm using proteus 7.8


Think u clearly got my problem and show me how to fix this...
please help me guyssss!!
thankzz

 

In Proteus, you can connect directly to the serial port from the MCU. No need for a max232

 

ya but i want to use max 232 in my project ..

 

Do you have a PC with a proper 9pin D RS232 port for a test?
Max.

 

thankz for replying
now i'm using my laptop for this work and it does not have any rs232 port thats why i created virtual port using software when i work with hyperterminal.
And i have mentioned the results in my comment.
But i have pc that has com ports rs232
but i don't have other components pic and other stuff now at this moment..
I spend two days to fix this problem but unable to fix it
so what you guys suggest me to do?