powerpc mvme5500 clock off by factor of 150

[Kate Feng]

Peter Dufault wrote:

> The clock on the MVME5500 seems to be off by a factor of 150.  In the
> "ticker" test it is taking 750 seconds instead of 5 seconds for the
> displays of the times.  I started fiddling constants in bspstart.c but
> then reading the I2C bus started to fail so I decided I had to look
> through things and get an overview and not continue ignorantly.
>
> I'm looking through it now, but if anyone has hints based on knowledge
> of the PPC decrementer and the PPC board support packages and how they
> support the clock (or maybe changes that went into 4.7?) on where I
> should look I'd appreciate it.
>

I  never tested the tests/samples/ticker.  However, the mvme5500 clock
works fine for me.  Attached is a test program I  wrote.  The test result
is:


Cexp>test_ticker()


*** Ticker TEST ***
Ticks per second 100.000000
 - rtems_clock_get - 09:00:00   03/07/2005
 - rtems_clock_get - 09:00:01   03/07/2005
 - rtems_clock_get - 09:00:02   03/07/2005
 - rtems_clock_get - 09:00:03   03/07/2005
 - rtems_clock_get - 09:00:04   03/07/2005
 - rtems_clock_get - 09:00:05   03/07/2005
 - rtems_clock_get - 09:00:06   03/07/2005
 - rtems_clock_get - 09:00:07   03/07/2005
 - rtems_clock_get - 09:00:08   03/07/2005
 - rtems_clock_get - 09:00:09   03/07/2005


Reagrds,
Kate

-------------- next part --------------
/*
 *  Simple test program -- simplified version of sample test hello.
 */

#include <bsp.h>

#include <stdio.h>
/*
 * ANSI C
 */
#include <time.h>
#include <limits.h>

/*
 * RTEMS
 */
#include <libcpu/io.h>
#include <rtems.h>
#include <rtems/rtems_bsdnet.h>
#include <bsp.h>

#define print_time(_s1, _tb, _s2) \
  do { \
    printf( "%s%02d:%02d:%02d   %02d/%02d/%04d%s", \
       _s1, (_tb)->hour, (_tb)->minute, (_tb)->second, \
       (_tb)->month, (_tb)->day, (_tb)->year, _s2 ); \
    fflush(stdout); \
  } while ( 0 )


void test_ticker()
{
  rtems_interval rtemsTicksPerSecond;
  double rtemsTicksPerSecond_double;
  int i;
  rtems_status_code sc;
  rtems_time_of_day time;


  printf( "\n\n*** Ticker TEST ***\n" );
  rtems_clock_get(RTEMS_CLOCK_GET_TICKS_PER_SECOND, &rtemsTicksPerSecond);
  rtemsTicksPerSecond_double = rtemsTicksPerSecond;
  printf("Ticks per second %lf\n", rtemsTicksPerSecond_double);
  time.year = 2005;
  time.month = 3;
  time.day = 7;
  time.hour = 9;
  time.minute = 0;
  time.second = 0;
  time.ticks = 0;
  if ((sc = rtems_clock_set (&time)) != RTEMS_SUCCESSFUL)
     printf ("***** Can't set time: %s\n", rtems_status_text (sc));


  for (i=0; i<10; i++) {
     rtems_bsp_delay(1000000); /* delay 1 second */

     sc = rtems_clock_get (RTEMS_CLOCK_GET_TOD, &time);
     if (sc == RTEMS_SUCCESSFUL) {
        print_time( " - rtems_clock_get - ", &time, "\n" );
     }
     else
        printf("rtems_clock_get failed %d\n", sc); 
  }
}