Driver for the MC33775A monitoring chip. More...

#include "n775.h"
#include "HL_system.h"
#include "MC33775A.h"
#include "afe_dma.h"
#include "database.h"
#include "diag.h"
#include "os.h"

Include dependency graph for n775.c:

Go to the source code of this file.

Macros
#define	N775_MAX_SUPPORTED_CELLS (12u)

#define	N775_SAVELASTSTATES()

Functions
static void	N775_SetFirstMeasurementCycleFinished (N775_STATE_s *n775_state)
	sets the measurement initialization status. More...

static void	N775_CopyStructToTxBuffer (N775_MESSAGE_s message, uint16_t buffer)
	sends a write command to the daisy-chain. More...

static void	N775_WakeUp (uint16_t daisyChainAddress, uint16_t deviceAddress, uint16_t registerAddress)
	sends a wake-up command to the daisy-chain. More...

static void	N775_Write (uint16_t daisyChainAddress, uint16_t deviceAddress, uint16_t registerAddress, uint16_t data)
	sends a write command to the daisy-chain. More...

static void	N775_Read (uint16_t daisyChainAddress, uint16_t deviceAddress, uint16_t registerAddress, uint16_t totalNumberOfRequestedRegister)
	sends a read command to the daisy-chain. More...

static void	N775_Initialize_Database (void)
	in the database, initializes the fields related to the N775 driver. More...

static void	N775_StateTransition (N775_STATEMACH_e state, uint8_t subState, uint16_t timer_ms)
	function for setting N775_Trigger state transitions More...

uint16_t	n775_CrcAddItem (uint16_t remainder, uint16_t item)
	Called to calculate the CRC of a message. NXP function. More...

static N775_RETURN_TYPE_e	N775_CheckStateRequest (N775_STATE_REQUEST_e statereq)
	checks the state requests that are made. More...

uint16_t	n775_CalcCrc (const N775_MESSAGE_s *msg)
	Calculate the CRC of a message. NXP function. More...

uint8_t	N775_CheckReEntrance (void)
	re-entrance check of N775 state machine trigger function More...

uint8_t	TEST_N775_CheckReEntrance (void)

N775_STATE_REQUEST_e	N775_GetStateRequest (void)
	gets the current state request. More...

N775_STATEMACH_e	N775_GetState (void)
	gets the current state. More...

N775_STATE_REQUEST_e	N775_TransferStateRequest ()
	transfers the current state request to the state machine. More...

N775_RETURN_TYPE_e	N775_SetStateRequest (N775_STATE_REQUEST_e statereq)
	sets the current state request of the state variable n775_state. More...

void	N775_Trigger (void)
	trigger function for the N775 driver state machine. More...

bool	N775_IsFirstMeasurementCycleFinished (void)
	gets the measurement initialization status. More...

void	TEST_N775_SetFirstMeasurementCycleFinished (N775_STATE_s *n775_state)

Variables
N775_MESSAGE_s	n775_sentData = {0}

N775_MESSAGE_s	n775_receivedData = {0}

uint8_t	n775_enumerateAddress = 1u

N775_STATE_s	n775_state


uint16_t	n775_RXbuffer [N775_MAX_N_BYTES_FOR_DATA_RECEPTION] = {0}

uint16_t	n775_TXbuffer [N775_TX_MESSAGE_LENGTH] = {0}


static DATA_BLOCK_CELL_VOLTAGE_s	n775_cellVoltage = {.header.uniqueId = DATA_BLOCK_ID_CELL_VOLTAGE_BASE}

static DATA_BLOCK_CELL_TEMPERATURE_s	n775_cellTemperature = {.header.uniqueId = DATA_BLOCK_ID_CELL_TEMPERATURE_BASE}

static DATA_BLOCK_MIN_MAX_s	n775_minMax = {.header.uniqueId = DATA_BLOCK_ID_MIN_MAX}

static DATA_BLOCK_BALANCING_CONTROL_s	n775_balancingControl = {.header.uniqueId = DATA_BLOCK_ID_BALANCING_CONTROL}

Detailed Description

Driver for the MC33775A monitoring chip.

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:

Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
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.
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: 2020-05-08 (date of creation)

Updated: 2022-05-30 (date of last update)

Version: v1.3.0

Prefix: N775

Definition in file n775.c.

Macro Definition Documentation

◆ N775_MAX_SUPPORTED_CELLS

#define N775_MAX_SUPPORTED_CELLS (12u)

maximum number of supported cells per slave-module

Definition at line 69 of file n775.c.

◆ N775_SAVELASTSTATES

#define N775_SAVELASTSTATES ( )

Value:

n775_state.lastState = n775_state.state; \

n775_state.lastSubState = n775_state.subState

n775_state

N775_STATE_s n775_state

Definition: n775.c:116

N775_STATE_s::subState

uint8_t subState

Definition: n775_defs.h:232

N775_STATE_s::state

N775_STATEMACH_e state

Definition: n775_defs.h:231

N775_STATE_s::lastState

N775_STATEMACH_e lastState

Definition: n775_defs.h:233

Saves the last state and the last substate

Definition at line 74 of file n775.c.

Function Documentation

◆ n775_CalcCrc()

uint16_t n775_CalcCrc ( const N775_MESSAGE_s * msg )

Calculate the CRC of a message. NXP function.

Parameters

msg

Returns: crc

Definition at line 199 of file n775.c.

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◆ N775_CheckReEntrance()

uint8_t N775_CheckReEntrance ( void )

re-entrance check of N775 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 n775_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: retval 0 if no further instance of the function is active, 0xff else

Definition at line 282 of file n775.c.

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◆ N775_CheckStateRequest()

static N775_RETURN_TYPE_e N775_CheckStateRequest ( N775_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 N775_RETURN_TYPE_e

Definition at line 515 of file n775.c.

◆ N775_CopyStructToTxBuffer()

static void N775_CopyStructToTxBuffer	(	N775_MESSAGE_s *	message,
		uint16_t *	buffer
	)

static

sends a write command to the daisy-chain.

Parameters

message	message to be sent
buffer	buffer used for SPI

Definition at line 568 of file n775.c.

◆ n775_CrcAddItem()

uint16_t n775_CrcAddItem	(	uint16_t	remainder,
		uint16_t	item
	)

Called to calculate the CRC of a message. NXP function.

Parameters

remainder
item

Returns: remainder

Definition at line 170 of file n775.c.

◆ N775_GetState()

N775_STATEMACH_e N775_GetState ( void )

gets the current state.

This function is used in the functioning of the N775 state machine.

Returns: current state, taken from N775_STATEMACH_e

Definition at line 323 of file n775.c.

◆ N775_GetStateRequest()

N775_STATE_REQUEST_e N775_GetStateRequest ( void )

gets the current state request.

This function is used in the functioning of the N775 state machine.

Returns: retval current state request, taken from N775_STATE_REQUEST_e

Definition at line 306 of file n775.c.

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◆ N775_Initialize_Database()

static void N775_Initialize_Database ( void )

static

in the database, initializes the fields related to the N775 driver.

This function loops through all the N775-related data fields in the database and sets them to 0. It should be called in the initialization or re-initialization routine of the N775 driver.

Definition at line 220 of file n775.c.

◆ N775_IsFirstMeasurementCycleFinished()

bool N775_IsFirstMeasurementCycleFinished ( void )

gets the measurement initialization status.

Returns: retval true if a first measurement cycle was made, false otherwise

Definition at line 540 of file n775.c.

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◆ N775_Read()

static void N775_Read	(	uint16_t	daisyChainAddress,
		uint16_t	deviceAddress,
		uint16_t	registerAddress,
		uint16_t	totalNumberOfRequestedRegister
	)

static

sends a read command to the daisy-chain.

Parameters

daisyChainAddress	parameter CADD in the message format
deviceAddress	parameter DADD in the message format lies between 1 and 62
registerAddress	address of first consecutive register to be read from
totalNumberOfRequestedRegister	total number of registers values sent by daisy-chain lies between 1 and 256

Set Head part or WRITE message

Set Data head part or WRITE message

Set Data part or WRITE message

Set CRC part or WRITE message

Definition at line 713 of file n775.c.

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◆ N775_SetFirstMeasurementCycleFinished()

static void N775_SetFirstMeasurementCycleFinished ( N775_STATE_s * n775_state )

static

sets the measurement initialization status.

Definition at line 553 of file n775.c.

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◆ N775_SetStateRequest()

N775_RETURN_TYPE_e N775_SetStateRequest ( N775_STATE_REQUEST_e statereq )

sets the current state request of the state variable n775_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 N775_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 N775_STATE_REQUEST_e

Definition at line 347 of file n775.c.

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◆ N775_StateTransition()

static void N775_StateTransition	(	N775_STATEMACH_e	state,
		uint8_t	subState,
		uint16_t	timer_ms
	)

static

function for setting N775_Trigger state transitions

Parameters

state	state to transition into
subState	substate to transition into
timer_ms	transition into state, substate after timer elapsed

Definition at line 264 of file n775.c.

◆ N775_TransferStateRequest()

N775_STATE_REQUEST_e N775_TransferStateRequest ( )

transfers the current state request to the state machine.

This function takes the current state request from n775_state and transfers it to the state machine. It resets the value from n775_state to N775_STATE_NO_REQUEST

Returns: retVal current state request, taken from N775_STATE_REQUEST_e

Definition at line 336 of file n775.c.

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◆ N775_Trigger()

void N775_Trigger ( void )

trigger function for the N775 driver state machine.

This function contains the sequence of events in the N775 state machine. It must be called time-triggered, every 1ms.

Definition at line 361 of file n775.c.

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◆ N775_WakeUp()

static void N775_WakeUp	(	uint16_t	daisyChainAddress,
		uint16_t	deviceAddress,
		uint16_t	registerAddress
	)

static

sends a wake-up command to the daisy-chain.

Parameters

daisyChainAddress	parameter CADD in the message format
deviceAddress	parameter DADD in the message format lies between 1 and 62, 63 means all devices
registerAddress	address of register to be written to

Set Head part or WRITE message

Set Data head part or WRITE message

Set Data part or WRITE message

Set CRC part or WRITE message

Definition at line 592 of file n775.c.

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◆ N775_Write()

static void N775_Write	(	uint16_t	daisyChainAddress,
		uint16_t	deviceAddress,
		uint16_t	registerAddress,
		uint16_t	data
	)

static

sends a write command to the daisy-chain.

Parameters

daisyChainAddress	parameter CADD in the message format
deviceAddress	parameter DADD in the message format lies between 1 and 62, 63 means all devices
registerAddress	address of register to be written to
data	data to be written in the device register

Set Head part or WRITE message

Set Data head part or WRITE message

Set Data part or WRITE message

Set CRC part or WRITE message

Definition at line 651 of file n775.c.

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◆ TEST_N775_CheckReEntrance()

uint8_t TEST_N775_CheckReEntrance ( void )

Definition at line 295 of file n775.c.

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◆ TEST_N775_SetFirstMeasurementCycleFinished()

void TEST_N775_SetFirstMeasurementCycleFinished ( N775_STATE_s * n775_state )

Definition at line 559 of file n775.c.

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Variable Documentation

◆ n775_balancingControl

DATA_BLOCK_BALANCING_CONTROL_s n775_balancingControl = {.header.uniqueId = DATA_BLOCK_ID_BALANCING_CONTROL}

static

local copies of database tables

Definition at line 113 of file n775.c.

◆ n775_cellTemperature

DATA_BLOCK_CELL_TEMPERATURE_s n775_cellTemperature = {.header.uniqueId = DATA_BLOCK_ID_CELL_TEMPERATURE_BASE}

static

local copies of database tables

Definition at line 111 of file n775.c.

◆ n775_cellVoltage

DATA_BLOCK_CELL_VOLTAGE_s n775_cellVoltage = {.header.uniqueId = DATA_BLOCK_ID_CELL_VOLTAGE_BASE}

static

local copies of database tables

Definition at line 110 of file n775.c.

◆ n775_enumerateAddress

uint8_t n775_enumerateAddress = 1u

Definition at line 96 of file n775.c.

◆ n775_minMax

DATA_BLOCK_MIN_MAX_s n775_minMax = {.header.uniqueId = DATA_BLOCK_ID_MIN_MAX}

static

local copies of database tables

Definition at line 112 of file n775.c.

◆ n775_receivedData

N775_MESSAGE_s n775_receivedData = {0}

Struct used for SPI Rx transmissions for the communicaiton with MC33775A.

Definition at line 94 of file n775.c.

◆ n775_RXbuffer

uint16_t n775_RXbuffer[N775_MAX_N_BYTES_FOR_DATA_RECEPTION] = {0}

PEC buffer for RX and TX

Definition at line 87 of file n775.c.

◆ n775_sentData

N775_MESSAGE_s n775_sentData = {0}

Struct used for SPI Tx transmissions for the communicaiton with MC33775A.

Definition at line 93 of file n775.c.

◆ n775_state

N775_STATE_s n775_state

Initial value:

= {
    .timer                = 0,
    .stateReq             = N775_STATE_NO_REQUEST,
    .state                = N775_STATEMACH_UNINITIALIZED,
    .subState             = 0,
    .lastState            = N775_STATEMACH_UNINITIALIZED,
    .lastSubState         = 0,
    .errRequestCounter    = 0,
    .triggerEntry         = 0,
    .firstMeasurementMade = STD_NOT_OK,
    .checkSpiFlag         = STD_NOT_OK,
    .balanceControlDone   = STD_NOT_OK,
    .txTransmitOngoing    = false,
    .rxTransmitOngoing    = false,
    .totalMessages        = 0u,
    .remainingMessages    = 0u,
}

Variable containing the state machine state for the MC33775A driver.

Definition at line 116 of file n775.c.

◆ n775_TXbuffer

uint16_t n775_TXbuffer[N775_TX_MESSAGE_LENGTH] = {0}

Buffer used for SPI Tx transmissions for the communication with MC33775A.

Definition at line 88 of file n775.c.

Macros

Functions

Variables

Detailed Description

Macro Definition Documentation

◆ N775_MAX_SUPPORTED_CELLS

◆ N775_SAVELASTSTATES

Function Documentation

◆ n775_CalcCrc()

◆ N775_CheckReEntrance()

◆ N775_CheckStateRequest()

◆ N775_CopyStructToTxBuffer()

◆ n775_CrcAddItem()

◆ N775_GetState()

◆ N775_GetStateRequest()

◆ N775_Initialize_Database()

◆ N775_IsFirstMeasurementCycleFinished()

◆ N775_Read()

◆ N775_SetFirstMeasurementCycleFinished()

◆ N775_SetStateRequest()

◆ N775_StateTransition()

◆ N775_TransferStateRequest()

◆ N775_Trigger()

◆ N775_WakeUp()

◆ N775_Write()

◆ TEST_N775_CheckReEntrance()

◆ TEST_N775_SetFirstMeasurementCycleFinished()

Variable Documentation

◆ n775_balancingControl

◆ n775_cellTemperature

◆ n775_cellVoltage

◆ n775_enumerateAddress

◆ n775_minMax

◆ n775_receivedData

◆ n775_RXbuffer

◆ n775_sentData

◆ n775_state

◆ n775_TXbuffer