rs232 problem!!

[Ryan]

I got a problem.I cannot receive any text from my pic.Can someone help me??i use pic16f877,xtal 20Mhz,pcm v3.219.
i use a simple code but the result still the same.

#include <16F877.h>
#fuses HS,NOWDT,NOPROTECT,NOLVP // May need to be changed depending on the chip
// Change if you use a different chip
#use delay(clock=20000000) // Change if you use a different clock
#use rs232(baud=4800, xmit=PIN_C6, rcv=PIN_C7)
// Connect RS232 driver to PIC pins C6,C7

main() {
char c;

printf("Program is running, Start typing:\r\n");
while(TRUE) {
c=getc();
putc(c+1); // Echo the next char, A echos as B and so on
}

}

my pic is connected to max232 and then to pc.I use hyper terminal to receive/transmit the text.Or i need something other than hyper terminal??

pls help me........

[Ttelmah]

Make sure that the port is setup in the advanced settings on the PC, to have handshake set to 'none'. Otherwise unless you make the handshake connections to the PC, it may never see the port become 'active'. If it still doesn't work, you may have a wiring problem. Is the MAX232, developing it's +/-12v supplies correctly?. Can you check that there is activity on the serial line itself?. Have you got the 0v connection made as well as the data lines?. (some of these are very 'obvious', but it is amazing how often they get missed!...).

Best Wishes

[Christophe]

Use a scope to measure what is coming on the TX pin of the PIC:

=> if you don't see data, ther's something wrong with your pic or with your software

Measure TXIN of the max232:

=> if you don't see data, the lines aren't conncted

Then measure TXOUT of the MAX232:

=>If you don't see data, there 's probably something wrong with the MAX232. If you SEE data, check your PC settings..

good luck!