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Stream as a parameter in a function

 
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Eastfield
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Stream as a parameter in a function
PostPosted: Fri Aug 08, 2008 7:17 am     Reply with quote
hi all,

i am wondering how to use a stream as a parameter ?
i would like to do something like this :

void debug(stream _stream)
{
fprintf(_stream,"in this stream %?",stream);
}


thanks.
gribas



Joined: 21 Feb 2008
Posts: 21

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PostPosted: Wed Aug 13, 2008 7:48 am     Reply with quote
I don't think that's possible. The compiler expects a constant for the first parameter of fprintf();

this works, but it's kinda useless:
Code:

#use rs232(baud=9600,parity=N,xmit=PIN_C6,rcv=PIN_C7,bits=8,stream=SERIAL)
void main() {
   const int stream = SERIAL;
   fprintf(stream,"test");
}


What about defining a debug stream? Like this:
Code:

#device PASS_STRINGS=IN_RAM

#use rs232(baud=9600,parity=N,xmit=PIN_C6,rcv=PIN_C7,bits=8,stream=SERIAL)
#define DEBUG_STREAM SERIAL

void debug(char* msg) {
   fprintf(DEBUG_STREAM,"%s",msg);
}

void main() {
   debug("test");
}
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