communication with PC through RS232

[circle]

The following are my ccs program:
#include <16f877.h>
#use delay (clock=4000000)
#USE RS232(BAUD=9600, XMIT=PIN_C6, RCV=PIN_C7,PARITY=N,BITS=8,STREAM=COM_1)
void main()
{
char c;
fprintf(COM_1,"OK!\n");
while(1) {
if(kbhit()){
c=fgetc(COM_1);
if(c==00)fprintf(COM_1,"I have received 00H\n");
else fputc(c, COM_1);}
}

}
The problem is :whatever PC sent any word to PIC16F877,PIC only can receive 00H,then return "I have received 00H".I don't know why?Can any one help me.

[dvsoft]

bonjour

try this

int8 Cmd;
while(TRUE) {
if (kbhit()) {
Cmd = fgets(COM_1);
fprintf (COM_1,"I Have received :%d\r\n",Cmd);
}// End If
}// End While



Alain

[circle]

Thank you.But there is something wrong with my ICD2,it can't programe
MCU.When I want to put my program into PIC16F877,How should I
set appropriatel configuration bits for MCU?By far,I setup all item "OFF" or "disable".
The version of MPLAB which I use is 6.20.

[rwyoung]

#fuses NOWDT, NOLVP, PUT, NODEBUG, XT
_________________
Rob Young
The Screw-Up Fairy may just visit you but he has crashed on my couch for the last month!

[circle]

#include <16f877.h>
#fuses NOWDT, NOLVP, PUT, NODEBUG, XT
#use delay (clock=4000000)
#USE RS232(BAUD=9600, XMIT=PIN_C6, RCV=PIN_C7,PARITY=N,BITS=8,STREAM=COM_1)
void main()
{
char c;
fprintf(COM_1,"OK!\n");
while(1) {
if(kbhit()){
c=fgetc(COM_1);
fprintf (COM_1,"PIC have received :%d\n",c);

}

}
}
When I run the program above, no matter what word PC sent to PIC16F877,PIC can only output"PIC have recerved:0".
What's wrong with it?

[rwyoung]

[LytseFlap]

There's nothing wrong with the software. I think you've got a hardware problem. See page 213 of the reference manual and the sheets from Maxim.
Seeing the first problem, I agree with the poster above me that you need to study more about C and the controller.

Good Luck!