Rs232

[Cheick]

Hi,

I try to make a connection pic PC to post the character on the PC but that does not work. Is what my code is false?

Thanks.


#include <18f452.h>
#fuses NOWDT, NOLVP, PUT, NODEBUG, HS
#use delay (clock=20000000)
#use rs232(BAUD=9600, XMIT=PIN_C6, RCV=PIN_C7,PARITY=N,BITS=8,STREAM=COM_1)

void main()
{
char c;

fprintf(COM_1,"\rOK!\r\n");
fprintf(COM_1,"lire! ;-)\r\n");
while(1)
{
if(kbhit())
{
c=fgetc(COM_1);
fprintf(COM_1,"PIC a recu les charactere :'%c'\r\n",c);
fprintf(COM_1," ASCII code %d decimal ou 0x%02X hex\r\n",c,c);
}
}
}

[SherpaDoug]

What does your code do wrong? Does it print anything? You may have a problem with kbhit not referring to the stream, try:

if(kbhit(COM_1))

Also tell us what compiler version number you have.

English grammar correction:
"Is what my code is false?" should probably be "Where is my code wrong?".
_________________
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[rwyoung]

In addition to SherpaDoug's question, what are you using for your RS232 to TTL level shifting?

Assuming a MAX232 type chip, is it wired correctly?
Are the voltages on its V+, V- pins correct?

If you aren't using a level shifting chip and just driving the PCs RS232 port then you need to add the INVERT statement to your #use RS232 command.

Another quick suggestion, use the "CODE" button when submitting code on the forum. It keeps your formating rather than left justifying all the lines which makes it a bit hard to read. Click "CODE" then copy your code into the text box and click "CODE" a second time. You should see something like