Hi
Thanx for the reply. I will try your suggestions as soon as I get home.
As I said, printing strings works fine. So the setup should be fine too.
I've set sdout to use the UART.
Maybe I should be more careful with types and stuff. With gcc and my computer
this works fine. But of course there is quite a difference between a PIC
and a Mac?
BTW Maybe it is relevant that I use a resent sdcc snapshot for Mac OS X PPC.
I could try the same on Linux/i386 if necessary.
Anyway. I'm pretty impressed of the work that has been done to make sdcc
work for PICs. Although I'm not sure yet whether or not libraries like stdio
are an overkill for the PIC or at least for my needs.
I will post my results soon,
Cheers,
Ezra.
>----------------------------------------------------------------------
>
>Message: 1
>Date: Mon, 28 Aug 2006 00:45:32 +0200
>From: Raphael Neider <[EMAIL PROTECTED]>
>Subject: Re: [Sdcc-user] PIC 18F2550 vs. printf/sprintf
>To: sdcc-user@lists.sourceforge.net
>Message-ID: <[EMAIL PROTECTED]>
>Content-Type: text/plain; charset=iso-8859-15
>
>Hi,
>
>> For example this works:
>> printf("%s", "Hello");
>> But this doesn't:
>> printf("%d", 7);
>>
>> In some case the program seems to hang, other times I only get garbage.
>
>printf (varargs in general) are pretty easily confused by type mismatches:
>Passing a 2-byte int via stack where a 1-byte char is expected can easily
>break printf's output, though the remainder should remain unaffected (unless
>some vararg pointer is used to write to memory, in which case a size mismatch
>in any of the preceeding arguments will cause... say "interesting" results
>:-(
>
>Printf has been reported to work fine; I have been using it myself
>successfully.
>* You may try to use
>
>PUTCHAR(char c)
>{
> /* output c somehow */
>}
>
>volatile int i;
>i=7;
>stdout=STREAM_USER;
>printf("%s", i);
>
>to make sure that a two-byte int is passed to printf.
>* Also make sure you have selected a proper stdout: AFAIK, stdout is left
>undefined
>by default, which causes an undefined putchar routine to be used.
>* You might also need to define a proper putchar routine (using the PUTCHAR
>prototype macro,
>see device/pic16/stdio.h) for use with STREAM_USER.
>
>> Of course I can do this conversion by hand. But I want to check out
>> the functions in the library. Am I doing something wrong? Is there a
>> way to make this work?
>
>Please try the hints above or report more detailed what you already did;
>how you want to output your chars;
>whether you defined PUTCHAR or not;
>any other possibly helpful info ;-)
>
>Regards,
>Raphael
>
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