lintmr.cxgate

BCM 控制demo源代码

#define LINTMR_CXGATE
/******************************************************************************
*                                                       
*       Copyright (C) 2005 Freescale Semiconductor, Inc.
*       All Rights Reserved								              
*														                            
* Filename:     lintmr.cxgate                
*														                            
* Revision:      										                    
*														                            
* Functions:    LIN Timeout management module 
*												                            
* Description:  
*												                            
* Notes:        Protocol timeouts -- only for Master node
*												                            
******************************************************************************/

#include <hidef.h>      /* common defines and macros */
#include <linxgate.h>
#include <linbase.h>


#if defined	(USEXGATE)
#if defined	(MASTER)

/****************************************************************************
 * All common-purpose RAM variables shall be declared here.
 ***************************************************************************/
extern LIN_WORD LIN_IdleTimeout;          /* counter for idle timeout */

#if defined (MASTER)
extern LIN_BYTE LIN_ProtocolTimeout;
extern LIN_WORD LIN_LengthCh0Tick;
#endif /* defined (MASTER) */

/****************************************************************************
 * Functions 
 ***************************************************************************/

/***************************************************************************
 * Function :   XLIN_CancelTimeout
 *
 * Description: Cancel protocol timeout
 *
 * Returns:     none
 *
 * Notes:       none
 *
 **************************************************************************/
void XLIN_CancelTimeout( void )
{
    /* disable channel interrupt */
	LIN_PITINTE &= ~LIN_PITINTE_PINTE;	/* disable PIT Channel Interrupt*/
}


/***************************************************************************
 * Function :   LIN_ISR_Timer
 *
 * Description: Timer interrupt routine. 
 *              Used for:   LIN_MaxFrameTime, 
 *                          LIN_WakeupDelimiterTime
 *                          timeouts maintenance.
 *              Also used for:  break generation.
 *                 
 * Returns:     none
 *
 * Notes:       
 *
 **************************************************************************/
void interrupt XLIN_ISR_Timer( void ) 
{
    LIN_DBG_SET_PORT_0;
    LIN_DBG_SET_PORT_4;

    --LIN_ProtocolTimeout;

    if ( LIN_ProtocolTimeout == 0)
    {   
        /* timeout expired */

        /* clear interrupt flag and disable channel interrupt */
		LIN_PITINTE &= ~LIN_PITINTE_PINTE;	/* disable PIT channel interrupt */
		LIN_PITTF = LIN_PITTF_PTF;	/* clear channel interrupt flag */
        
        XLIN_Timeout();
    }
    else
    {
        /* timeout continued */

        /* arm timer Channel for next compare */
		LIN_PITTF = LIN_PITTF_PTF;	/* clear channel interrupt flag */
		LIN_PITINTE |= LIN_PITINTE_PINTE;	/* enable channel Interrupt*/
    
    }

    LIN_DBG_CLR_PORT_0;
    LIN_DBG_CLR_PORT_4;
}

/***************************************************************************
 * Function :   XLIN_SetTimeout
 *
 * Description: Set protocol timeout.
 *                  - disable channel 0 interrupt
 *                  - set timeout
 *                  - enable channel 0 interrupt
 *                  - set LIN_ProtocolTimeout value
 *
 * Returns:     none
 *
 * Notes:       none
 *
 **************************************************************************/
void XLIN_SetTimeout(LIN_BYTE timeoutIndex)
{
	LIN_PITINTE        &= ~LIN_PITINTE_PINTE;	                  /* at first, disable PIT channel interrupt */
    LIN_LengthCh0Tick   =  LIN_MTO_Ticks[timeoutIndex];           /* at second, set timeout */
	LIN_PITMTLD0        =  LIN_CfgConst.LIN_PIT_MicroCounterValue;/* Load the micro counter 0 value into the load register */
	LIN_PITLD           =  LIN_LengthCh0Tick;	                  /* Load the timeout value into channel load register */
	LIN_PITCFLMT       |=  LIN_PITCFLMT_PFLMT0;	                  /* load the micro counter 0 */
	LIN_PITFLT         |=  LIN_PITFLT_PFLT;	                      /* load the channel counter */
	LIN_PITTF           =  LIN_PITTF_PTF;	                      /* clear channel interrupt flag */
	LIN_PITINTE        |=  LIN_PITINTE_PINTE;	                  /* enable channel Interrupt*/
    
    /* set LIN_ProtocolTimeout value for this timeout */
    LIN_ProtocolTimeout = LIN_MTO_Counter[timeoutIndex];
}
#endif /*defined (MASTER)*/

/***************************************************************************
 * Function :   XLIN_SetIdleTimeout
 *
 * Description: Set/reset LIN_IdleTimeout variable from constant
 *                 
 * Returns:     none
 *
 * Notes:       
 *
 **************************************************************************/
void XLIN_SetIdleTimeout( void )
{        
    //LIN_IdleTimeout = LIN_CfgConst.LIN_IdleTimeoutClocks;
    LIN_IdleTimeout = LIN_IDLETIMEOUT;
}

#endif /*defined (USEXGATE)*/