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fprintf misunderstanding?

 
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asmallri



Joined: 12 Aug 2004
Posts: 1634
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fprintf misunderstanding?
PostPosted: Sun Feb 03, 2008 2:12 pm     Reply with quote
I am not sure if this is a bug or my misunderstanding. I am using 4.053

I have the following declarations

Code:

#use rs232(baud=115200,parity=N,xmit=PIN_C6,rcv=PIN_C7,bits=8)
#use rs232(baud=115200,parity=N,xmit=PIN_C6,rcv=PIN_C7,bits=8, STREAM=CONSOLE)
#use rs232(baud=2400,parity=N,xmit=PIN_G1,rcv=PIN_G2,bits=8, STREAM=DATA)


If I do this..
Code:

fprintf(DATA,"This is on the DATA port\r\n"); 
printf("This should be on the CONSOLE port\r\n)"


Both lines print on the DATA port. But if I do the following
Code:

fprintf(DATA,"This is on the DATA port\r\n"); 
fprintf(CONSOLE,"This is on the Console port\r\n");
printf("This should be on the CONSOLE port\r\n)"


Then the data message appears on the data port and the CONSOLE messages both appear on the console port. It appears the printf uses the output routines from the last STREAM.

Is this what is supposed to happen?
_________________
Regards, Andrew

http://www.brushelectronics.com/software
Home of Ethernet, SD card and Encrypted Serial Bootloaders for PICs!!
PCM programmer



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PostPosted: Sun Feb 03, 2008 2:50 pm     Reply with quote
Yes, I think so. If you use streams, everything should be a stream.
This includes the declarations and the print statements.
Ttelmah
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PostPosted: Sun Feb 03, 2008 3:22 pm     Reply with quote
Historically, STDIO (which is what is used without a stream declaration), is always the _last_ #USE RS232 declaration the compiler has met. This is still true.

Best Wishes
asmallri



Joined: 12 Aug 2004
Posts: 1634
Location: Perth, Australia

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PostPosted: Sun Feb 03, 2008 3:27 pm     Reply with quote
In this case it is now broken. The stdio changes to whatever last fprintf stream was used.
_________________
Regards, Andrew

http://www.brushelectronics.com/software
Home of Ethernet, SD card and Encrypted Serial Bootloaders for PICs!!
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