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//==========================================================================
//
// clocktruth.cxx
//
// Clock accuracy test
//
//==========================================================================
// ####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
// This file is part of eCos, the Embedded Configurable Operating System.
// Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
//
// eCos is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free
// Software Foundation; either version 2 or (at your option) any later
// version.
//
// eCos is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
// for more details.
//
// You should have received a copy of the GNU General Public License
// along with eCos; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
// As a special exception, if other files instantiate templates or use
// macros or inline functions from this file, or you compile this file
// and link it with other works to produce a work based on this file,
// this file does not by itself cause the resulting work to be covered by
// the GNU General Public License. However the source code for this file
// must still be made available in accordance with section (3) of the GNU
// General Public License v2.
//
// This exception does not invalidate any other reasons why a work based
// on this file might be covered by the GNU General Public License.
// -------------------------------------------
// ####ECOSGPLCOPYRIGHTEND####
//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s): hmt
// Contributors: hmt
// Date: 2001-06-05
// Description: Tests the Kernel Real Time Clock for accuracy using a human
//
//####DESCRIPTIONEND####
// This is for a human to watch to sanity check the clock rate.
// It's easier to see what's happening if you enable this:
#define nRUNFOREVER
#include <pkgconf/kernel.h>
#include <cyg/kernel/clock.hxx>
#include <cyg/kernel/sema.hxx>
#include <cyg/kernel/thread.hxx>
#include <cyg/infra/testcase.h>
#include <cyg/kernel/clock.inl>
#include <cyg/kernel/thread.inl>
#ifdef CYGVAR_KERNEL_COUNTERS_CLOCK
#include <cyg/infra/diag.h>
#define NTHREADS 1
#include "testaux.hxx"
#ifdef RUNFOREVER
#define ENDPOINT 8192
#else
#define ENDPOINT 20
#endif
static cyg_alarm_fn alarmfunc;
static void alarmfunc( Cyg_Alarm *alarm, CYG_ADDRWORD data )
{
Cyg_Binary_Semaphore *sp = (Cyg_Binary_Semaphore *)data;
sp->post();
}
static void entry0( CYG_ADDRWORD data )
{
cyg_uint32 now, then;
int i;
Cyg_Clock *rtc = Cyg_Clock::real_time_clock;
Cyg_Binary_Semaphore sema;
Cyg_Alarm alarm( rtc, &alarmfunc, (CYG_ADDRWORD)&sema );
// First, print 100 lines as fast as you can, of distinct ticks.
for ( i = 0; i < 100; i++ ) {
now = rtc->current_value_lo();
then = now;
while ( then == now )
now = rtc->current_value_lo();
diag_printf( "INFO<time now %8d>\n", now );
}
diag_printf( "INFO<per-second times are: %8d>\n", rtc->current_value_lo() );
for ( i = 0; i < 20; i++ ) {
Cyg_Thread::counted_sleep( 100 );
diag_printf( "INFO<per-second time %2d is %8d>\n",
i, rtc->current_value_lo() );
}
alarm.initialize( rtc->current_value() + 100, 100 );
alarm.enable();
for ( i = 0; i < ENDPOINT; i++ ) {
sema.wait();
diag_printf( "INFO<alarm time %2d is %8d>\n",
i, rtc->current_value_lo() );
}
CYG_TEST_PASS_FINISH("Clock truth OK");
}
void clocktruth_main( void )
{
CYG_TEST_INIT();
new_thread(entry0, (CYG_ADDRWORD)&thread_obj[0]);
Cyg_Scheduler::start();
}
externC void
cyg_start( void )
{
#ifdef CYGSEM_HAL_STOP_CONSTRUCTORS_ON_FLAG
cyg_hal_invoke_constructors();
#endif
clocktruth_main();
}
#else // def CYGVAR_KERNEL_COUNTERS_CLOCK
externC void
cyg_start( void )
{
CYG_TEST_INIT();
CYG_TEST_NA( "Kernel real-time clock disabled");
}
#endif // def CYGVAR_KERNEL_COUNTERS_CLOCK
// EOF clocktruth.cxx
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