tmt.c

Nucleus+PLUS+Internals+源码+2410

    /* Return the current value of the system clock.  */
    return(TMD_System_Clock);
}



/*************************************************************************/
/*                                                                       */
/* FUNCTION                                                              */
/*                                                                       */
/*      TMT_Read_Timer                                                   */
/*                                                                       */
/* DESCRIPTION                                                           */
/*                                                                       */
/*      This function returns the current value of the count-down timer. */
/*                                                                       */
/* AUTHOR                                                                */
/*                                                                       */
/*      William E. Lamie, Accelerated Technology, Inc.                   */
/*                                                                       */
/* CALLED BY                                                             */
/*                                                                       */
/*      TMC_Start_Timer                     Start timer function         */
/*                                                                       */
/* CALLS                                                                 */
/*                                                                       */
/*      None                                                             */
/*                                                                       */
/* INPUTS                                                                */
/*                                                                       */
/*      None                                                             */
/*                                                                       */
/* OUTPUTS                                                               */
/*                                                                       */
/*      TMD_Timer                           Value of count-down timer    */
/*                                                                       */
/* HISTORY                                                               */
/*                                                                       */
/*         NAME            DATE                    REMARKS               */
/*                                                                       */
/*      W. Lamie        xx-xx-199x      Created initial version 1.0      */
/*      D. Lamie        xx-xx-199x      Verified version 1.0             */
/*                                                                       */
/*************************************************************************/
UNSIGNED  TMT_Read_Timer(VOID)
{

    /* Return the current value of the count-down timer.  */
    return(TMD_Timer);
}



/*************************************************************************/
/*                                                                       */
/* FUNCTION                                                              */
/*                                                                       */
/*      TMT_Enable_Timer                                                 */
/*                                                                       */
/* DESCRIPTION                                                           */
/*                                                                       */
/*      This function enables the count-down timer with the specified    */
/*      value.                                                           */
/*                                                                       */
/* AUTHOR                                                                */
/*                                                                       */
/*      William E. Lamie, Accelerated Technology, Inc.                   */
/*                                                                       */
/* CALLED BY                                                             */
/*                                                                       */
/*      TMC_Start_Timer                     Start timer function         */
/*      TMC_Timer_Task                      Timer expiration task        */
/*                                                                       */
/* CALLS                                                                 */
/*                                                                       */
/*      None                                                             */
/*                                                                       */
/* INPUTS                                                                */
/*                                                                       */
/*      time                                New count-down time          */
/*                                                                       */
/* OUTPUTS                                                               */
/*                                                                       */
/*      None                                                             */
/*                                                                       */
/* HISTORY                                                               */
/*                                                                       */
/*         NAME            DATE                    REMARKS               */
/*                                                                       */
/*      W. Lamie        xx-xx-199x      Created initial version 1.0      */
/*      D. Lamie        xx-xx-199x      Verified version 1.0             */
/*                                                                       */
/*************************************************************************/
VOID  TMT_Enable_Timer(UNSIGNED time)
{

    /* Place the new time value into the count-down timer.  */
    TMD_Timer =  time;
    
    /* Indicate that the timer is active.  */
    TMD_Timer_State =  TM_ACTIVE;
}



/*************************************************************************/
/*                                                                       */
/* FUNCTION                                                              */
/*                                                                       */
/*      TMT_Adjust_Timer                                                 */
/*                                                                       */
/* DESCRIPTION                                                           */
/*                                                                       */
/*      This function adjusts the count-down timer with the specified    */
/*      value- if the new value is less than the current.                */
/*                                                                       */
/* AUTHOR                                                                */
/*                                                                       */
/*      William E. Lamie, Accelerated Technology, Inc.                   */
/*                                                                       */
/* CALLED BY                                                             */
/*                                                                       */
/*      TMC_Start_Timer                     Start timer function         */
/*                                                                       */
/* CALLS                                                                 */
/*                                                                       */
/*      None                                                             */
/*                                                                       */
/* INPUTS                                                                */
/*                                                                       */
/*      time                                New count-down time          */
/*                                                                       */
/* OUTPUTS                                                               */
/*                                                                       */
/*      None                                                             */
/*                                                                       */
/* HISTORY                                                               */
/*                                                                       */
/*         NAME            DATE                    REMARKS               */
/*                                                                       */
/*      W. Lamie        xx-xx-199x      Created initial version 1.0      */
/*      D. Lamie        xx-xx-199x      Verified version 1.0             */
/*                                                                       */
/*************************************************************************/
VOID  TMT_Adjust_Timer(UNSIGNED time)
{


    /* See if new time value is less than current time value.  */
    if (time < TMD_Timer)
   
        /* Adjust timer.  */
        TMD_Timer =  time;

}



/*************************************************************************/
/*                                                                       */
/* FUNCTION                                                              */
/*                                                                       */
/*      TMT_Disable_Timer                                                */
/*                                                                       */
/* DESCRIPTION                                                           */
/*                                                                       */
/*      This function disables the count-down timer.                     */
/*                                                                       */
/* AUTHOR                                                                */
/*                                                                       */
/*      William E. Lamie, Accelerated Technology, Inc.                   */
/*                                                                       */
/* CALLED BY                                                             */
/*                                                                       */
/*      TMC_Start_Timer                     Start timer function         */
/*      TMC_Timer_Task                      Timer expiration task        */
/*                                                                       */
/* CALLS                                                                 */
/*                                                                       */
/*      None                                                             */
/*                                                                       */
/* INPUTS                                                                */
/*                                                                       */
/*      None                                                             */
/*                                                                       */
/* OUTPUTS                                                               */