[Tinyos-devel] Re: [Tinyos-help] Question about printf

[Kevin Klues]

The printf library doesnt actually implement a printf fucntion.  It
implementes a putchar function called by the stdlib printf function
defined in stdio.h

Kevin

On 9/22/07, Philip Levis <pal at cs.stanford.edu> wrote:
> On Sep 22, 2007, at 11:18 AM, Kevin Klues wrote:
>
> > So here'e a link to the new version of printf I'm talking about. Why
> > don't people try it out and let me know if they think its better.
> >
> > http://sing.stanford.edu/klueska/printf_test.tar.gz
> >
> > To use it just add the following line to your makefile:
> > CFLAGS += /path/to/printf_test
> >
> > Then anywhere in your application (or underlying OS code) just add
> > #include "printf.h" to the top of any module to be able to and call
> > printf() within it.
> >
> > To see output, you can then run the java PrintfClient found in
> > net.tinyos.tools as follows (may be different depending on your mote
> > platform):
> > java net.tinyos.tools.PrintfClient -comm serial@/dev/ttyUSB0:telosb
>
> I think my point has been lost in the shuffle: it's not whether there
> should be a C function that lets you send text messages to the serial
> port with no wiring (albeit my comment about dependencies, and that
> it might be useful to incorporate it into tos.h somehow to prevent
> them). Rather, all I was saying is that maybe the function should not
> be named "printf."
>
> Phil
>


-- 
~Kevin