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getc? putc?how do u use it?

 
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crushneck



Joined: 27 Nov 2005
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getc? putc?how do u use it?
PostPosted: Wed Feb 08, 2006 8:04 am     Reply with quote
im sorry but im a little confuse on how to use the getc and putc...
what if i want a PIC to send data to use putc...and the other PIC get the data to use getc?isit possible? i read the last forum but still didnt get the right one...anyone please?
rwyoung



Joined: 12 Nov 2003
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Location: Lawrence, KS USA

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PostPosted: Wed Feb 08, 2006 8:23 am     Reply with quote
From the on-line help file (and probably the same text in the PDF manual):

getc()
Quote:
This function waits for a character to come in over the RS232 RCV pin and returns the character. If you do not want to hang forever waiting for an incoming character use kbhit() to test for a character available. If a built-in USART is used the hardware can buffer 3 characters otherwise GETC must be active while the character is being received by the PIC�.


putc()
Quote:
This function sends a character over the RS232 XMIT pin. A #USE RS232 must appear before this call to determine the baud rate and pin used. The #USE RS232 remains in effect until another is encountered in the file.


So getc() receives and putc() transmits.

If you are still having problems I suggest you borrow or buy a copy of "The C Language" 2nd ed. by Kernighan and Ritchie.
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Rob Young
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crushneck



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PostPosted: Thu Feb 09, 2006 11:39 am     Reply with quote
can u give an example on how to use it? like one for putc() and the other one is for getc() only? Because i wanna use it for pic 2 pic comnication.
rwyoung



Joined: 12 Nov 2003
Posts: 563
Location: Lawrence, KS USA

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PostPosted: Thu Feb 09, 2006 11:55 am     Reply with quote
crushneck wrote:
can u give an example on how to use it? like one for putc() and the other one is for getc() only? Because i wanna use it for pic 2 pic comnication.


Did you go look at the manual at all? The entry for putc() has an example as does the entry for getc(). There is even an complete example program installed with the compiler, ex_tgetc.
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Rob Young
The Screw-Up Fairy may just visit you but he has crashed on my couch for the last month!
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