kbhit() and RS232 streams

[hillcraft]

I need to make a timed getc() that applies to a particular RS232 stream. I use one stream to speak to the PC and the other to speak to my diagnostic tool.

I need to know which one of the two timed getc()'s times out. The PC is a hardware stream and the diagnostic tester is SW.

I am running a 877A @ 20MHZ

Any ideas?

[PCM programmer]

With the version of PCM that I have (3.181), both kbhit() and fgetc()
will accept a stream parameter. So it seems to me that you could
create two "timed_getc()" functions, one for each stream.
Call them timed_getc_1() and timed_getc_2(), or use whatever your
stream names are, instead of calling them _1 and _2.

Then use the timed_getc() function in EX_TGETC.C as a model to
create the two functions above. In the two places where it calls
kbhit(), put in the appropriate stream as a parameter. Where it
calls getc(), replace that with fgetc(), and put in the proper stream
as a parameter.

[ChristianK]

Hello,

i have a problem with kbhit...

i work with the HW UART and one SW UART:

#use rs232 ( baud=9600, parity=N, xmit=PIN_C6, rcv=PIN_C7, stream=GSM, bits=8 )
#use rs232 ( baud=4800 ,parity=N, xmit=PIN_C4, rcv=PIN_C5, stream=GPS, bits=8 )

Also, some code like:
(ui32 = unsigned int32)

ui32_TimeoutCnt = 0;

while ( !kbhit(GPS) && ( ++ui32_TimeoutCnt < 250000 ) ) // Timeout, after 5s @ 4800 Baud
delay_us(20);

if ( kbhit(GPS) )
uc_RxChar = fgetc(GPS);
else {
g_b_GPSTimeoutErrorFlag = TRUE;
//output_high(PIN_D1);
uc_RxState = 2;
}

Now, my problem:
If i disconnect the GPS module from the controller everything works fine, BUT if the GSM module is also connected to the controller, no timeout from the GPS module is detected?

Thank you in advance...

[PCM programmer]

[kolio]

Check this quotes from the help first:
"This directive (#use RS232) tells the compiler the baud rate and pins used for serial I/O. This directive takes effect until another RS232 directive is encountered. The #USE DELAY directive must appear before this directive can be used. "
Good luck,
Kolio