interlock.c File Reference

Driver for the interlock. More...

#include "interlock.h"
#include "database.h"
#include "diag.h"
#include "io.h"
#include "os.h"

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Macros
#define	ILCK_SAVELASTSTATES()

Functions
static ILCK_RETURN_TYPE_e	ILCK_CheckStateRequest (ILCK_STATE_REQUEST_e statereq)
	checks the state requests that are made. More...
static ILCK_STATE_REQUEST_e	ILCK_TransferStateRequest (void)
	transfers the current state request to the state machine. More...
static uint8_t	ILCK_CheckReEntrance (void)
	re-entrance check of ILCK state machine trigger function More...
static void	ILCK_InitializePins (void)
	Initializes required pins for interlock evaluation. More...
static ILCK_ELECTRICAL_STATE_TYPE_e	ILCK_GetInterlockFeedback (void)
	Reads the feedback pin of the interlock and returns its current value (ILCK_SWITCH_OFF/ILCK_SWITCH_ON) More...
ILCK_STATEMACH_e	ILCK_GetState (void)
	gets the current state. More...
ILCK_RETURN_TYPE_e	ILCK_SetStateRequest (ILCK_STATE_REQUEST_e statereq)
	sets the current state request of the state variable ilck_state. More...
void	ILCK_Trigger (void)
	trigger function for the ILCK driver state machine. More...

Variables
static ILCK_STATE_s	ilck_state
static DATA_BLOCK_INTERLOCK_FEEDBACK_s	ilck_tableFeedback = {.header.uniqueId = DATA_BLOCK_ID_INTERLOCK_FEEDBACK}

Detailed Description

Driver for the interlock.

Copyright

© 2010 - 2021, Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V. All rights reserved.

SPDX-License-Identifier: BSD-3-Clause

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

We kindly request you to use one or more of the following phrases to refer to foxBMS in your hardware, software, documentation or advertising materials:

• ″This product uses parts of foxBMS®″
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Author

foxBMS Team

Date

2020-02-24 (date of creation)

Updated

2021-10-18 (date of last update)

Prefix

ILCK

The interlock driver measures the relevant hardware signals from the interlock circuit. For details on available hardware signals please refer to the section on this module in the foxBMS documentation.

In reference to the names in the foxBMS schematic, this module uses the following names:

shorthand	meaning
IL	interlock
HS	high-side
LS	low-side
VS	voltage sense
CS	current sense

Definition in file interlock.c.

Macro Definition Documentation

ILCK_SAVELASTSTATES

#define ILCK_SAVELASTSTATES

(

)

Value:

    ilck_state.laststate    = ilck_state.state; \
    ilck_state.lastsubstate = ilck_state.substate

Saves the last state and the last substate

Definition at line 81 of file interlock.c.

Function Documentation

ILCK_CheckReEntrance()

static uint8_t ILCK_CheckReEntrance ( void  )

static

re-entrance check of ILCK state machine trigger function

This function is not re-entrant and should only be called time- or event-triggered. It increments the triggerentry counter from the state variable ilck_state. It should never be called by two different processes, so if it is the case, triggerentry should never be higher than 0 when this function is called.

Returns

0 if no further instance of the function is active, 0xFF else

Definition at line 180 of file interlock.c.

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ILCK_CheckStateRequest()

static ILCK_RETURN_TYPE_e ILCK_CheckStateRequest ( ILCK_STATE_REQUEST_e  statereq )

static

checks the state requests that are made.

This function checks the validity of the state requests. The results of the checked is returned immediately.

Parameters

statereq

state request to be checked

Returns

result of the state request that was made, taken from ILCK_RETURN_TYPE_e

Definition at line 150 of file interlock.c.

ILCK_GetInterlockFeedback()

static ILCK_ELECTRICAL_STATE_TYPE_e ILCK_GetInterlockFeedback ( void  )

static

Reads the feedback pin of the interlock and returns its current value (ILCK_SWITCH_OFF/ILCK_SWITCH_ON)

Returns

measuredInterlockState (type: ILCK_ELECTRICAL_STATE_TYPE_e)

Local variable containing voltages measured on TMS570 ADC1 inputs

Pin low: interlock closed, pin high: interlock open

Definition at line 203 of file interlock.c.

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ILCK_GetState()

ILCK_STATEMACH_e ILCK_GetState

(

void

)

gets the current state.

This function is used in the functioning of the ILCK state machine.

Returns

current state, taken from ILCK_STATEMACH_e

Definition at line 246 of file interlock.c.

ILCK_InitializePins()

static void ILCK_InitializePins ( void  )

static

Initializes required pins for interlock evaluation.

Definition at line 194 of file interlock.c.

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ILCK_SetStateRequest()

ILCK_RETURN_TYPE_e ILCK_SetStateRequest

(

ILCK_STATE_REQUEST_e

statereq

)

sets the current state request of the state variable ilck_state.

This function is used to make a state request to the state machine,e.g, start voltage measurement, read result of voltage measurement, re-initialization It calls ILCK_CheckStateRequest() to check if the request is valid. The state request is rejected if is not valid. The result of the check is returned immediately, so that the requester can act in case it made a non-valid state request.

Parameters

statereq

state request to set

Returns

retVal current state request, taken from ILCK_STATE_REQUEST_e

Definition at line 250 of file interlock.c.

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ILCK_TransferStateRequest()

static ILCK_STATE_REQUEST_e ILCK_TransferStateRequest ( void  )

static

transfers the current state request to the state machine.

This function takes the current state request from ilck_state and transfers it to the state machine. It resets the value from ilck_state to ILCK_STATE_NO_REQUEST

Returns

current state request, taken from ILCK_STATE_REQUEST_e

Definition at line 169 of file interlock.c.

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ILCK_Trigger()

void ILCK_Trigger

(

void

)

trigger function for the ILCK driver state machine.

This function contains the sequence of events in the ILCK state machine. It must be called time-triggered, every 1ms.

Definition at line 264 of file interlock.c.

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Variable Documentation

ilck_state

ILCK_STATE_s ilck_state

static

Initial value:

= {
    .timer             = 0,
    .statereq          = ILCK_STATE_NO_REQUEST,
    .state             = ILCK_STATEMACHINE_UNINITIALIZED,
    .substate          = ILCK_ENTRY,
    .laststate         = ILCK_STATEMACHINE_UNINITIALIZED,
    .lastsubstate      = ILCK_ENTRY,
    .triggerentry      = 0,
    .ErrRequestCounter = 0,
    .counter           = 0,
}

contains the state of the contactor state machine

Definition at line 89 of file interlock.c.

ilck_tableFeedback

DATA_BLOCK_INTERLOCK_FEEDBACK_s ilck_tableFeedback = {.header.uniqueId = DATA_BLOCK_ID_INTERLOCK_FEEDBACK}

static

Local variable containing interlock feedback

Definition at line 102 of file interlock.c.