kclock0.c

ecos为实时嵌入式操作系统

/*=================================================================
//
//        kclock0.c
//
//        Kernel C API Clock test 0
//
//==========================================================================
//####COPYRIGHTBEGIN####
//
// -------------------------------------------
// The contents of this file are subject to the Cygnus eCos Public License
// Version 1.0 (the "License"); you may not use this file except in
// compliance with the License.  You may obtain a copy of the License at
// http://sourceware.cygnus.com/ecos
// 
// Software distributed under the License is distributed on an "AS IS"
// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See the
// License for the specific language governing rights and limitations under
// the License.
// 
// The Original Code is eCos - Embedded Cygnus Operating System, released
// September 30, 1998.
// 
// The Initial Developer of the Original Code is Cygnus.  Portions created
// by Cygnus are Copyright (C) 1998,1999 Cygnus Solutions.  All Rights Reserved.
// -------------------------------------------
//
//####COPYRIGHTEND####
//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):     dsm
// Contributors:    dsm
// Date:          1998-03-20
// Description:   Tests some basic clock functions.
//####DESCRIPTIONEND####
*/

#include <cyg/kernel/kapi.h>

#include <cyg/infra/testcase.h>

#ifdef CYGVAR_KERNEL_COUNTERS_CLOCK

#ifdef CYGFUN_KERNEL_API_C

#include "testaux.h"

cyg_alarm_t call_me;

cyg_counter counter0o, counter1o;
cyg_handle_t counter0, counter1;

cyg_alarm alarmo[3];
cyg_handle_t alarm0, alarm1, alarm2;

cyg_resolution_t res, res0, res1;

cyg_clock clock0o;
cyg_handle_t clock0;

const cyg_uint32 big_number = 3333222111u;

cyg_bool_t flash( void )
{
    cyg_counter_create( &counter0, &counter0o );
    cyg_counter_create( &counter1, &counter1o );
    
    cyg_alarm_create( counter0,
                      call_me,
                      (cyg_addrword_t)12,
                      &alarm0,
                      &alarmo[0]);

    res.dividend = 1;
    res.divisor = 2;

    cyg_clock_create( res, &clock0, &clock0o );
    cyg_clock_delete( clock0 );

    cyg_alarm_delete( alarm0 );

    cyg_counter_delete( counter0 );
    cyg_counter_delete( counter1 );

    return true;
}

/* Testing alarms
//
// call_me is a function that will be called when an alarm is
// triggered.  It updates a global variable called which is CHECKed
// explicitly to see if the approriate alarms have been called.
*/

cyg_uint16 called = 0x0;

void call_me(cyg_handle_t alarm, cyg_addrword_t data)
{
    called ^= (int)data;
}

void call_me2(cyg_handle_t alarm, cyg_addrword_t data)
{
    call_me(alarm, (cyg_addrword_t)((int)data^0x10));
}


void kclock0_main(void)
{
    CYG_TEST_INIT();

    CHECK(flash());
    CHECK(flash());

    cyg_counter_create( &counter0, &counter0o);

    CHECK( 0 == cyg_counter_current_value( counter0 ) );

    cyg_counter_tick(counter0);

    CHECK( 1 == cyg_counter_current_value(counter0) );

    cyg_counter_tick(counter0);

    CHECK( 2 == cyg_counter_current_value(counter0) );

    cyg_counter_set_value( counter0, 0xffffffff );

    CHECK( 0xffffffff == cyg_counter_current_value(counter0) );

    cyg_counter_tick(counter0); // Overflows 32 bits
    
    CHECK( 0x100000000ULL == cyg_counter_current_value(counter0) );

    cyg_counter_set_value(counter0, 11);
    CHECK( 11 == cyg_counter_current_value(counter0) );
    
    /* the call_me functions cause the "called" bits to toggle
    // checking the value of called checks the parity of # of calls
    // made by each alarm.
    */

    cyg_alarm_create(counter0,
                     call_me,  (cyg_addrword_t)0x1, &alarm0, &alarmo[0]);
    cyg_alarm_create(counter0,
                     call_me,  (cyg_addrword_t)0x2, &alarm1, &alarmo[1]);
    cyg_alarm_create(counter0,
                     call_me2, (cyg_addrword_t)0x4, &alarm2, &alarmo[2]);
    
    CHECK( 0x00 == called );
    cyg_alarm_initialize(alarm0, 12,3);
    cyg_alarm_initialize(alarm2, 21,2);
    CHECK( 0x00 == called );

    cyg_counter_tick(counter0);         /* 12 a0 */
    CHECK( 0x01 == called );

    cyg_alarm_initialize(alarm1, 13,0);
    cyg_counter_tick(counter0);         /* 13 a1 */
    CHECK( 0x03 == called );

    cyg_alarm_initialize(alarm1, 17,0);
    cyg_counter_tick(counter0);         /* 14 */
    CHECK( 0x03 == called );

    cyg_counter_tick(counter0);         /* 15 a0 */
    CHECK( 0x02 == called );

    cyg_counter_tick(counter0);         /* 16 */
    cyg_counter_tick(counter0);         /* 17 a1 */
    CHECK( 0x00 == called );

    cyg_counter_tick(counter0);         /* 18 a0 */
    CHECK( 0x01 == called );

    cyg_counter_tick(counter0);         /* 19 */
    cyg_counter_tick(counter0);         /* 20 */
    cyg_counter_tick(counter0);         /* 21 a0 a2 */
    CHECK( 0x14 == called );

    cyg_counter_tick(counter0);         /* 22 */
    cyg_counter_tick(counter0);         /* 23 a2 */
    CHECK( 0x00 == called );
    
    cyg_alarm_disable(alarm2);  

    cyg_counter_tick(counter0);         /* 24 a0 */
    cyg_counter_tick(counter0);         /* 25 */
    CHECK( 0x01 == called );
    
    cyg_alarm_enable(alarm2);           /* a2 (enabled at 25) */
    CHECK( 0x15 == called );

    cyg_counter_tick(counter0);         /* 26 */
    CHECK( 0x15 == called );
    
    cyg_counter_tick(counter0);         /* 27 a0 a2 */
    cyg_counter_tick(counter0);         /* 28 */
    CHECK( 0x00 == called );
    
    cyg_counter_tick(counter0);         /* 29 a2 */
    cyg_counter_tick(counter0);         /* 30 a0 */
    cyg_counter_tick(counter0);         /* 31 a2 */
    CHECK( 0x01 == called );

    res0.dividend = 100;
    res0.divisor   = 3;

    cyg_clock_create( res0, &clock0, &clock0o );

    res1 = cyg_clock_get_resolution(clock0);
    CHECK( res0.dividend == res1.dividend );
    CHECK( res0.divisor == res1.divisor );

    res1.dividend = 12;
    res1.divisor = 25;

    cyg_clock_set_resolution(clock0, res1);
    res0 = cyg_clock_get_resolution(clock0);
    CHECK( res0.dividend == res1.dividend );
    CHECK( res0.divisor == res1.divisor );

    cyg_clock_to_counter(clock0, &counter1);

    CHECK( 0 == cyg_counter_current_value( counter1 ) );
    CHECK( 0 == cyg_current_time() );

    cyg_counter_tick(counter1);

    CHECK( 1 == cyg_counter_current_value(counter1) );

    res0 = cyg_clock_get_resolution(cyg_real_time_clock());

    /* Current time should be 0 as interrupts will still be disabled */
    CHECK( 0 == cyg_current_time() );

    CYG_TEST_PASS_FINISH("Kernel C API Clock 0 OK");
}

externC void
cyg_start( void )
{
    kclock0_main();
}

#else // def CYGFUN_KERNEL_API_C
#define N_A_MSG "Kernel C API layer disabled"
#endif // def CYGFUN_KERNEL_API_C
#else // def CYGVAR_KERNEL_COUNTERS_CLOCK
#define N_A_MSG "Kernel real-time clock disabled"
#endif // def CYGVAR_KERNEL_COUNTERS_CLOCK

#ifdef N_A_MSG
externC void
cyg_start( void )
{
    CYG_TEST_INIT();
    CYG_TEST_NA( N_A_MSG );
}
#endif // N_A_MSG

// EOF kclock0.c