/*
* error state handler
*
* Copyright (c) 2012-2023 emotas embedded communication GmbH
*-------------------------------------------------------------------
* $Id: codrv_error.c 47801 2023-07-06 14:39:17Z ro $
*
*
*-------------------------------------------------------------------
*
*
*/

/********************************************************************/
/**
* \file
* \brief   error state handling
*
*/

/* header of standard C - libraries
---------------------------------------------------------------------------*/
#include <stddef.h>

/* header of project specific types
---------------------------------------------------------------------------*/
#include <gen_define.h>

#include <co_datatype.h>
#include <co_commtask.h>
#include <co_drv.h>

#include "codrv_error.h"


/* constant definitions
---------------------------------------------------------------------------*/

/* local defined data types
---------------------------------------------------------------------------*/

/* list of external used functions, if not in headers
---------------------------------------------------------------------------*/

/* list of global defined functions
---------------------------------------------------------------------------*/

/* list of local defined functions
---------------------------------------------------------------------------*/

/* external variables
---------------------------------------------------------------------------*/

/* global variables
---------------------------------------------------------------------------*/
static CAN_ERROR_FLAGS_T canErrorFlags;

/* local defined variables
---------------------------------------------------------------------------*/

/***************************************************************************/
/**
* \brief codrvCanErrorgetFlags - Reference to the error flags
*
* \retval
*	pointer to error flags
*
*/

CAN_ERROR_FLAGS_T * codrvCanErrorGetFlags(
		void	/* no parameter */
	)
{
	return(&canErrorFlags);
}


/***************************************************************************/
/**
* \brief codrvCanErrorInit - init Error variables
*
*/

void codrvCanErrorInit(
		void	/* no parameter */
	)
{
CAN_ERROR_FLAGS_T * pError;

	pError = codrvCanErrorGetFlags();

	pError->canErrorRxOverrun = CO_FALSE;

	pError->canErrorPassive = CO_FALSE;
	pError->canErrorActive = CO_FALSE;
	pError->canErrorBusoff = CO_FALSE;

	pError->drvErrorGeneric = CO_FALSE;

	pError->canOldState = Error_Offline; /* last signaled state */

}

/***********************************************************************/
/**
* codrvCanErrorInformStack - inform the stack about changes
*
* Call outside of interrupts!
* Typical call in codrvCanDriverHandler().
*
*/

RET_T codrvCanErrorInformStack(
		void	/* no parameter */
	)
{
CAN_ERROR_FLAGS_T * pError;

	pError = codrvCanErrorGetFlags();

	if (pError->canErrorRxOverrun == CO_TRUE)  {
		/* CAN Overrun */
		pError->canErrorRxOverrun = CO_FALSE;
		coCommStateEvent(CO_COMM_STATE_EVENT_CAN_OVERRUN);
	}

	if (pError->drvErrorGeneric == CO_TRUE)  {
		/* general driver error */
		pError->drvErrorGeneric = CO_FALSE;
		coCommStateEvent(CO_COMM_STATE_EVENT_DRV_ERROR);
	}

	/* signal CAN Error changed events
	* 	(Active <-> Passive -> Busoff -> Active)
	*/

	if ((pError->canNewState == Error_Busoff)
			|| (pError->canErrorBusoff == CO_TRUE))
	{
		if (pError->canOldState == Error_Active)  {
			/* Passive event */
			coCommStateEvent(CO_COMM_STATE_EVENT_PASSIVE);
		}
		if (pError->canOldState != Error_Busoff)  {
			/* Busoff event */
			coCommStateEvent(CO_COMM_STATE_EVENT_BUS_OFF);
		}
	}

	if ((pError->canOldState == Error_Busoff)
		|| (pError->canOldState == Error_Offline)
		|| (pError->canErrorBusoff == CO_TRUE))
	{
		if (pError->canNewState == Error_Passive)  {
			/* Active event */
			coCommStateEvent(CO_COMM_STATE_EVENT_ACTIVE);
			/* Passive event*/
			coCommStateEvent(CO_COMM_STATE_EVENT_PASSIVE);
		}
	}


	if ((pError->canOldState == Error_Active)
			&& (pError->canNewState == Error_Passive)
			&& (pError->canErrorBusoff == CO_FALSE))
	{
		/* Passive event */
		coCommStateEvent(CO_COMM_STATE_EVENT_PASSIVE);
	}


	if ((pError->canOldState == Error_Active)
		&& (pError->canNewState == Error_Active))
	{
		if (pError->canErrorBusoff == CO_TRUE)  {
			/* Active event */
			coCommStateEvent(CO_COMM_STATE_EVENT_ACTIVE);
		} else
		if (pError->canErrorPassive == CO_TRUE)  {
			/* Passive event */
			coCommStateEvent(CO_COMM_STATE_EVENT_PASSIVE);
			/* Active event */
			coCommStateEvent(CO_COMM_STATE_EVENT_ACTIVE);
		} else {
			/* nothing */
		}

	}

	/* if ((pError->canOldState == Error_Passive)
		|| (pError->canOldState == Error_Busoff)
		|| (pError->canOldState == Error_Offline)) */
	if (pError->canOldState != Error_Active)
	{
		if (pError->canNewState == Error_Active)  {
			/* Active event */
			coCommStateEvent(CO_COMM_STATE_EVENT_ACTIVE);
		}

	}

	pError->canErrorPassive = CO_FALSE;
	pError->canErrorActive = CO_FALSE;
	pError->canErrorBusoff = CO_FALSE;
	pError->canOldState = pError->canNewState;

	return(RET_OK);
}