printf vs. printk (on LPC32XX)

[Sebastian Huber]

On 04/29/2013 11:10 AM, SAeeD wrote:
> Hello everyone,
>
> I'm getting some weird problems when running tmtests on PhyCORE LPC3250.
> I've configured rtems4.10.2 as follows:
>
> $ mkdir b-lpc3250-phycore
> $ cd b-lpc3250-phycore
> $ ../configure --target=arm-rtems4.10
> --enable-rtemsbsp=lpc32xx_phycore --enable-tests=yes
> --enable-networking --enable-posix --prefix=$PWD/bsp-install
> $ make all install
>
> When I run tmtests, specifically talking, tm01 on PhyCORE LPC3250,
> everything works smoothly and all texts are printed on the console.
> But when I run, tm03, it hangs in the middle of printing jobs.
> When I changed the definition of put_time in timesys.h to use printk
> instead of printf, tmtests are working without any problem. That is,
> those lines that were printed incompletely when using printf, are now
> printed completely using printk.
> I must mention that everything works fine with rtems4.11. (Without any
> modification.)
>
> I want to ask: what's the point indeed?

The difference between 4.10.2 and 4.11 is this in configure.ac:

+RTEMS_BSPOPTS_SET([TESTS_USE_PRINTK],[*],[1])
+RTEMS_BSPOPTS_HELP([TESTS_USE_PRINTK],[tests use printk() for output])

-- 
Sebastian Huber, embedded brains GmbH

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