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error: Function used but not defined ???

 
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rikotech8



Joined: 10 Dec 2011
Posts: 376
Location: Sofiq,Bulgariq

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error: Function used but not defined ???
PostPosted: Wed Jan 16, 2013 1:15 pm     Reply with quote
Why I get an error by compiling this program? What does this error mean?
Here is the code:
Code:

#include <18F4550.h>
#fuses NOWDT,NOMCLR,HS,USBDIV,PLL4,VREGEN,CPUDIV1
#use delay(clock=16M)
#include <usb_cdc.h>
#INCLUDE <stdlib.h>

void main()
{
int i;
char str[];
usb_cdc_init();
usb_init_cs();
usb_init();

while (true)
   {
   usb_task();
   if(usb_cdc_kbhit())
      {
      i=get_int_usb(); //I have error on this line
      usb_cdc_putc(i);
      }
   }
}

The error is:
Function used but not defined .... get_int_usb() SCR=9201
What is wrong with my code?
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Ttelmah



Joined: 11 Mar 2010
Posts: 19219

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PostPosted: Wed Jan 16, 2013 1:39 pm     Reply with quote
You need to load stdlib.h
The getint function uses atoi, which is not present, till stdlib is loaded.

Best Wishes
rikotech8



Joined: 10 Dec 2011
Posts: 376
Location: Sofiq,Bulgariq

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PostPosted: Wed Jan 16, 2013 2:22 pm     Reply with quote
Thanks for answer, but I'm not sure what I need to do by loading stdlib.h?
And how exactly to load stdlib, I have included the file already. What means to load stdlib.h/
Thanks again!
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Ttelmah



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PostPosted: Wed Jan 16, 2013 2:33 pm     Reply with quote
It needs to be _in front_ of the usb file.

Best Wishes
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Wed Jan 16, 2013 2:54 pm     Reply with quote
Quote:

void main()
{
int i;
char str[];
usb_cdc_init();
usb_init_cs();
usb_init();

Also, the empty array in bold above will probably cause problems.
See this post:
http://www.ccsinfo.com/forum/viewtopic.php?t=30197&start=2
rikotech8



Joined: 10 Dec 2011
Posts: 376
Location: Sofiq,Bulgariq

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PostPosted: Thu Jan 17, 2013 1:03 pm     Reply with quote
Thanks to both of you! My problem has been solved.
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