mxm_afe.c File Reference

AFE driver implementation. More...

#include "general.h"
#include "afe.h"
#include "mxm_17841b.h"
#include "mxm_1785x.h"
#include "mxm_battery_management.h"
#include "os.h"

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Functions
static void	MXM_Tick (void)
	Tick function. More...
static void	MXM_SetStateStructDefaultValues (void)
	Initialize the state structs. More...
STD_RETURN_TYPE_e	AFE_TriggerIc (void)
STD_RETURN_TYPE_e	AFE_Initialize (void)
STD_RETURN_TYPE_e	AFE_StartMeasurement (void)
	Makes the initialization request to the AFE state machine. More...
bool	AFE_IsFirstMeasurementCycleFinished (void)
	Checks if the first AFE measurement cycle was made. More...
STD_RETURN_TYPE_e	AFE_RequestIoWrite (uint8_t string)
	Makes the request to the AFE state machine to write to the IO port-expander. More...
STD_RETURN_TYPE_e	AFE_RequestIoRead (uint8_t string)
	Makes the request to the AFE state machine to read from the IO port-expander. More...
STD_RETURN_TYPE_e	AFE_RequestTemperatureRead (uint8_t string)
	Makes the request to the AFE state machine to read from the external temperature sensor on slaves. More...
STD_RETURN_TYPE_e	AFE_RequestBalancingFeedbackRead (uint8_t string)
	Makes the request to the AFE state machine to read balancing feedback from the slaves. More...
STD_RETURN_TYPE_e	AFE_RequestEepromRead (uint8_t string)
	Makes the request to the AFE state machine to read from the external EEPROM on slaves. More...
STD_RETURN_TYPE_e	AFE_RequestEepromWrite (uint8_t string)
	Makes the request to the AFE state machine to write to the external EEPROM on slaves. More...
STD_RETURN_TYPE_e	AFE_RequestOpenWireCheck (uint8_t string)
	Makes the request to the AFE state machine to perform open-wire check. More...

Variables
static MXM_41B_INSTANCE_s	mxm_41bState
static MXM_5X_INSTANCE_s	mxm_5xState
static DATA_BLOCK_CELL_VOLTAGE_s	mxm_tableCellVoltages = {.header.uniqueId = DATA_BLOCK_ID_CELL_VOLTAGE_BASE}
	Local cell voltage data block. More...
static DATA_BLOCK_CELL_TEMPERATURE_s	mxm_tableCellTemperatures
	Local cell temperature data block. More...
static DATA_BLOCK_BALANCING_CONTROL_s	mxm_tableBalancingControl = {.header.uniqueId = DATA_BLOCK_ID_BALANCING_CONTROL}
	Balancing control. More...
static DATA_BLOCK_OPEN_WIRE_s	mxm_tableOpenWire = {.header.uniqueId = DATA_BLOCK_ID_OPEN_WIRE_BASE}
	Local data structure for openwire results. More...
static MXM_BALANCING_STATE_s	mxm_balancingState
static MXM_MONITORING_INSTANCE_s	mxm_state

Detailed Description

AFE driver implementation.

Copyright

© 2010 - 2022, 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:

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Author

foxBMS Team

Date

2020-06-16 (date of creation)

Updated

2022-05-30 (date of last update)

Version

v1.3.0

Prefix

AFE

Definition in file mxm_afe.c.

Function Documentation

AFE_Initialize()

STD_RETURN_TYPE_e AFE_Initialize

(

void

)

initializer, this function is called in order to initialize the AFE

Definition at line 201 of file mxm_afe.c.

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AFE_IsFirstMeasurementCycleFinished()

bool AFE_IsFirstMeasurementCycleFinished

(

void

)

Checks if the first AFE measurement cycle was made.

this function returns whether the first measurement cycle has finished

Returns

true is the first measurement cycle was made, false otherwise

Definition at line 220 of file mxm_afe.c.

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AFE_RequestBalancingFeedbackRead()

STD_RETURN_TYPE_e AFE_RequestBalancingFeedbackRead

(

uint8_t

string

)

Makes the request to the AFE state machine to read balancing feedback from the slaves.

Parameters

string

string addressed by the request

Definition at line 242 of file mxm_afe.c.

AFE_RequestEepromRead()

STD_RETURN_TYPE_e AFE_RequestEepromRead

(

uint8_t

string

)

Makes the request to the AFE state machine to read from the external EEPROM on slaves.

Parameters

string

string addressed by the request

Definition at line 247 of file mxm_afe.c.

AFE_RequestEepromWrite()

STD_RETURN_TYPE_e AFE_RequestEepromWrite

(

uint8_t

string

)

Makes the request to the AFE state machine to write to the external EEPROM on slaves.

Parameters

string

string addressed by the request

Definition at line 252 of file mxm_afe.c.

AFE_RequestIoRead()

STD_RETURN_TYPE_e AFE_RequestIoRead

(

uint8_t

string

)

Makes the request to the AFE state machine to read from the IO port-expander.

Parameters

string

string addressed by the request

Definition at line 232 of file mxm_afe.c.

AFE_RequestIoWrite()

STD_RETURN_TYPE_e AFE_RequestIoWrite

(

uint8_t

string

)

Makes the request to the AFE state machine to write to the IO port-expander.

Parameters

string

string addressed by the request

Definition at line 227 of file mxm_afe.c.

AFE_RequestOpenWireCheck()

STD_RETURN_TYPE_e AFE_RequestOpenWireCheck

(

uint8_t

string

)

Makes the request to the AFE state machine to perform open-wire check.

Parameters

string

string addressed by the request

Definition at line 257 of file mxm_afe.c.

AFE_RequestTemperatureRead()

STD_RETURN_TYPE_e AFE_RequestTemperatureRead

(

uint8_t

string

)

Makes the request to the AFE state machine to read from the external temperature sensor on slaves.

Parameters

string

string addressed by the request

Definition at line 237 of file mxm_afe.c.

AFE_StartMeasurement()

STD_RETURN_TYPE_e AFE_StartMeasurement

(

void

)

Makes the initialization request to the AFE state machine.

this function should tell the AFE that it should start measuring

Returns

true or false

Definition at line 209 of file mxm_afe.c.

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AFE_TriggerIc()

STD_RETURN_TYPE_e AFE_TriggerIc

(

void

)

tick function, this function is called to advance the state machine

Definition at line 176 of file mxm_afe.c.

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MXM_SetStateStructDefaultValues()

static void MXM_SetStateStructDefaultValues ( void  )

static

Initialize the state structs.

This function sets default values to the members of the state structs. It can be used to reset the driver to a default value.

Definition at line 169 of file mxm_afe.c.

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MXM_Tick()

static void MXM_Tick ( void  )

static

Tick function.

This function is the central entry-point for this driver. It calls the state-machines via the functions MXM_StateMachine(), MXM_5XStateMachine() and MXM_41BStateMachine().

The state-machines are called in such a way that the main blocking point is the SPI interface. (That means the order is optimized so that every cycle a SPI command should be available for sending or receiving as this is the limiting ressource.)

Definition at line 150 of file mxm_afe.c.

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Variable Documentation

mxm_41bState

MXM_41B_INSTANCE_s mxm_41bState

static

state variable for the MAX17841B driver

Definition at line 69 of file mxm_afe.c.

mxm_5xState

MXM_5X_INSTANCE_s mxm_5xState

static

state variable for the Battery Management protocol driver

Definition at line 73 of file mxm_afe.c.

mxm_balancingState

MXM_BALANCING_STATE_s mxm_balancingState

static

Initial value:

= {
    .pBalancingControl_table = &mxm_tableBalancingControl,
}

balancing state variable

Definition at line 104 of file mxm_afe.c.

mxm_state

MXM_MONITORING_INSTANCE_s mxm_state

static

Initial value:

= {
    .pBalancingState                    = &mxm_balancingState,
    .pInstance41B                       = &mxm_41bState,
    .pInstance5X                        = &mxm_5xState,
    .pCellVoltages_table                = &mxm_tableCellVoltages,
    .pCellTemperatures_table            = &mxm_tableCellTemperatures,
    .pOpenwire_table                    = &mxm_tableOpenWire,
    .selfCheck.crc                      = STD_NOT_OK,
    .selfCheck.conv                     = STD_NOT_OK,
    .selfCheck.firstSetBit              = STD_NOT_OK,
    .selfCheck.extractValueFromRegister = STD_NOT_OK,
    .selfCheck.parseVoltageReadall      = STD_NOT_OK,
    .selfCheck.addressSpaceChecker      = STD_NOT_OK,
}

state variable for the Maxim monitoring driver

Definition at line 109 of file mxm_afe.c.

mxm_tableBalancingControl

DATA_BLOCK_BALANCING_CONTROL_s mxm_tableBalancingControl = {.header.uniqueId = DATA_BLOCK_ID_BALANCING_CONTROL}

static

Balancing control.

This variable stores information about which cells need balancing

Definition at line 98 of file mxm_afe.c.

mxm_tableCellTemperatures

DATA_BLOCK_CELL_TEMPERATURE_s mxm_tableCellTemperatures

static

Initial value:

= {
    .header.uniqueId = DATA_BLOCK_ID_CELL_TEMPERATURE_BASE}

Local cell temperature data block.

This local instance stores the measured cell temperatures.

Definition at line 91 of file mxm_afe.c.

mxm_tableCellVoltages

DATA_BLOCK_CELL_VOLTAGE_s mxm_tableCellVoltages = {.header.uniqueId = DATA_BLOCK_ID_CELL_VOLTAGE_BASE}

static

Local cell voltage data block.

This local instance stores the measured cell voltages. In contrast to MXM_MONITORING_INSTANCE_s::localVoltages, the layout of this structure changes with the defined battery-system as it is described by the database_cfg.h. Mapping the values from MXM_MONITORING_INSTANCE_s::localVoltages to mxm_tableCellVoltages and copying these entries into the database is handled by MXM_ParseVoltagesIntoDB().

Definition at line 85 of file mxm_afe.c.

mxm_tableOpenWire

DATA_BLOCK_OPEN_WIRE_s mxm_tableOpenWire = {.header.uniqueId = DATA_BLOCK_ID_OPEN_WIRE_BASE}

static

Local data structure for openwire results.

Definition at line 101 of file mxm_afe.c.