RTEMS_DECONST - Should it be removed? - TMS570

[Martin Galvan]

Thanks a lot for your answer.

On Wed, Jan 21, 2015 at 4:27 PM, Gedare Bloom <gedare at gwu.edu> wrote:
> Martin,
>
> printf can be quite sensitive to register problems. You should isolate
> the bug e.g. by modifying hello world which does not have ISRs to do
> printf of a 2-digit int. If printf works there, the problem may be
> coming from register problems during ISR handling in which case you
> should use something with ISRs like ticker. If you have a small test
> case that shows the bug with the current git that would be worth
> creating a ticket on Trac and attaching the test case.

I explicitly disabled SCI interrupts when I started testing this (I'm
using tms570_sci_handler_polled as opposed to
tms570_sci_handler_interrupt as the termios device handler). The weird
thing is that printf is working fine with arbitrarily long strings, or
when formatting single-digit positive ints.

Here's the code I'm testing this with:

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <rtems/test.h>
#include <bsp.h> /* for device driver prototypes */
#include <stdio.h>

/* forward declarations to avoid warnings */
rtems_task Init(rtems_task_argument argument);

rtems_task Init(rtems_task_argument ignored)
{
  printf("%d\n", 10);

  while(1);
}


/* NOTICE: the clock driver is explicitly disabled */
#define CONFIGURE_APPLICATION_DOES_NOT_NEED_CLOCK_DRIVER
#define CONFIGURE_APPLICATION_NEEDS_CONSOLE_DRIVER

#define CONFIGURE_MAXIMUM_TASKS            1
#define CONFIGURE_USE_DEVFS_AS_BASE_FILESYSTEM

#define CONFIGURE_RTEMS_INIT_TASKS_TABLE

#define CONFIGURE_INITIAL_EXTENSIONS RTEMS_TEST_INITIAL_EXTENSION

#define CONFIGURE_INIT
#include <rtems/confdefs.h>