foxBMS - Unit Tests  1.5.0
The foxBMS Unit Tests API Documentation
mxm_1785x_tools.h File Reference

This is a collection of helper functions for the MAX1785x ICs. More...

#include "general.h"
#include "mxm_cfg.h"
#include "database.h"
#include "fstd_types.h"
#include "mxm_basic_defines.h"
#include "mxm_battery_management.h"
#include "mxm_register_map.h"
#include <stdint.h>
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Data Structures

struct  MXM_SELFCHECK_s
 
struct  MXM_REGISTRY_ENTRY_s
 
struct  MXM_BALANCING_STATE_s
 
struct  MXM_MONITORING_INSTANCE_s
 

Macros

#define MXM_RX_BUFFER_LENGTH   (100u)
 Length of RX buffer. More...
 

Enumerations

enum  MXM_STATEMACHINE_STATES_e {
  MXM_STATEMACHINE_STATES_UNINITIALIZED , MXM_STATEMACHINE_STATES_SELFCHECK_PRE_INIT , MXM_STATEMACHINE_STATES_INIT , MXM_STATEMACHINE_STATES_SELFCHECK_POST_INIT ,
  MXM_STATEMACHINE_STATES_IDLE , MXM_STATEMACHINE_STATES_OPERATION , MXM_STATEMACHINE_STATES_MAXSTATE
}
 States of the global Maxim state-machine. More...
 
enum  MXM_STATEMACHINE_OPERATION_STATES_e {
  MXM_INIT_ENTRY , MXM_INIT_DEVCFG1 , MXM_INIT_DEVCFG2 , MXM_INIT_SET_STATUS2 ,
  MXM_INIT_STATUS1 , MXM_INIT_GET_VERSION , MXM_INIT_GET_ID1 , MXM_INIT_GET_ID2 ,
  MXM_INIT_MEASUREEN1 , MXM_INIT_MEASUREEN2 , MXM_INIT_AUXGPIOCFG , MXM_INIT_AUXTIMEREG ,
  MXM_INIT_ACQCFG , MXM_INIT_UVTHSETREG , MXM_INIT_OVTHSETREG , MXM_INIT_BALEXP1 ,
  MXM_INIT_BALEXP2 , MXM_INIT_BALEXP3 , MXM_INIT_BALEXP4 , MXM_INIT_BALEXP5 ,
  MXM_INIT_BALEXP6 , MXM_INIT_BALEXP7 , MXM_INIT_BALEXP8 , MXM_INIT_BALEXP9 ,
  MXM_INIT_BALEXP10 , MXM_INIT_BALEXP11 , MXM_INIT_BALEXP12 , MXM_INIT_BALEXP13 ,
  MXM_INIT_BALEXP14 , MXM_INIT_BALSWDLY , MXM_INIT_ALRTOVEN , MXM_INIT_ALRTUVEN ,
  MXM_INIT_COMPOPNTHREG , MXM_INIT_I2C_GET_STAT1 , MXM_INIT_I2C_CFG , MXM_INIT_I2C_PNTR ,
  MXM_INIT_I2C_SEND_MUX0 , MXM_INIT_I2C_SEND_MUX1 , MXM_INIT_GET_I2C_STAT2 , MXM_OP_ENTRY_STATE ,
  MXM_OP_DIAGNOSTIC_ENTRY , MXM_OP_DIAGNOSTIC_STATUS1 , MXM_OP_DIAGNOSTIC_STATUS2 , MXM_OP_DIAGNOSTIC_STATUS3 ,
  MXM_OP_DIAGNOSTIC_FMEA1 , MXM_OP_DIAGNOSTIC_FMEA2 , MXM_OP_DIAGNOSTIC_CLEAR_STATUS2 , MXM_OP_DIAGNOSTIC_CLEAR_FMEA1 ,
  MXM_OP_DIAGNOSTIC_CLEAR_FMEA2 , MXM_OP_DIAGNOSTIC_EXIT , MXM_OP_SELECT_MUX_CHANNEL , MXM_OP_WRITE_MUX0 ,
  MXM_OP_WRITE_MUX1 , MXM_OP_SET_SCAN_STROBE , MXM_OP_GET_SCAN_STROBE , MXM_OP_GET_VOLTAGES ,
  MXM_OP_GET_ALRTSUM , MXM_OP_PARSE_VOLTAGES_INTO_DB , MXM_OP_PINOPEN_ENTRY , MXM_OP_PINOPEN_EXIT ,
  MXM_OP_PINOPEN_SET_CURRENT_SOURCES , MXM_OP_PINOPEN_COMPSCAN , MXM_OP_PINOPEN_GET_SCAN_STROBE , MXM_OP_PINOPEN_GET_ALRT ,
  MXM_OP_PINOPEN_PROCESS_OPENWIRE , MXM_OP_PINOPEN_RESTORE_CURRENT_SOURCE_CONF , MXM_OP_BAL_ENTRY , MXM_OP_BAL_CONTROL_STOP_BALANCING ,
  MXM_OP_BAL_CONTROL_RESET_ALL , MXM_OP_BAL_CONTROL_SET_ALL , MXM_OP_BAL_START , MXM_OP_BAL_READ_BALSTAT ,
  MXM_OP_BAL_EXIT , MXM_OP_CYCLE_END_ENTRY , MXM_OP_INCREMENT_MUX_COUNTER , MXM_OP_CYCLE_END_EXIT
}
 
enum  MXM_MONITORING_STATE_e { MXM_MONITORING_STATE_PENDING , MXM_MONITORING_STATE_PASS }
 

Functions

void MXM_Convert (uint8_t lsb, uint8_t msb, uint16_t *pTarget, MXM_CONVERSION_TYPE_e convType, uint32_t fullScaleReference_mV)
 Convert a measurement value to a voltage value. More...
 
STD_RETURN_TYPE_e GEN_MUST_CHECK_RETURN MXM_ConvertTest (void)
 Test the MXM_Convert()-function. More...
 
void MXM_ExtractValueFromRegister (uint8_t lsb, uint8_t msb, MXM_REG_BM bitmask, uint16_t *pValue)
 Extract a value from a single register. More...
 
STD_RETURN_TYPE_e GEN_MUST_CHECK_RETURN MXM_ExtractValueFromRegisterTest (void)
 Test MXM_ExtractValueFromRegister(). More...
 
STD_RETURN_TYPE_e GEN_MUST_CHECK_RETURN MXM_FirstSetBitTest (void)
 Test MXM_FirstSetBit(). More...
 
void MXM_Unipolar14BitInto16Bit (uint16_t inputValue, uint8_t *lsb, uint8_t *msb)
 convert a unipolar 14bit-value and shifts it into the 16bit-format More...
 
uint16_t MXM_VoltageIntoUnipolar14Bit (uint16_t voltage_mV, uint16_t fullscaleReference_mV)
 convert a voltage value into a unipolar 14bit value More...
 
void MXM_ConvertModuleToString (const uint16_t moduleNumber, uint8_t *pStringNumber, uint16_t *pModuleNumberInString)
 Get the string and module number from a global module number. More...
 

Detailed Description

This is a collection of helper functions for the MAX1785x ICs.

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
2020-07-15 (date of creation)
Updated
2023-02-03 (date of last update)
Version
v1.5.0
Prefix
MXM

This collection of helper functions for the MAX1785x ICs helps to calculate the lsb and msb for register values and similar tasks.

Definition in file mxm_1785x_tools.h.

Macro Definition Documentation

◆ MXM_RX_BUFFER_LENGTH

#define MXM_RX_BUFFER_LENGTH   (100u)

Length of RX buffer.

This define describes the length of the array MXM_MONITORING_INSTANCE_s::rxBuffer. It is large enough to fit the largest message that can be written into a single buffer which consists of 6 command bytes and MXM_MAXIMUM_NR_OF_MODULES times 2 receive bytes for the maximum number of connected monitoring ICs.

Definition at line 220 of file mxm_1785x_tools.h.

Enumeration Type Documentation

◆ MXM_MONITORING_STATE_e

intermediate state-definition for MXM_MonGetVoltages()

Enumerator
MXM_MONITORING_STATE_PENDING 

state completion is pending

MXM_MONITORING_STATE_PASS 

state passed successfully

Definition at line 172 of file mxm_1785x_tools.h.

◆ MXM_STATEMACHINE_OPERATION_STATES_e

states of the MXM_StateMachineOperation() statemachine

Enumerator
MXM_INIT_ENTRY 
MXM_INIT_DEVCFG1 
MXM_INIT_DEVCFG2 
MXM_INIT_SET_STATUS2 
MXM_INIT_STATUS1 
MXM_INIT_GET_VERSION 
MXM_INIT_GET_ID1 
MXM_INIT_GET_ID2 
MXM_INIT_MEASUREEN1 
MXM_INIT_MEASUREEN2 
MXM_INIT_AUXGPIOCFG 
MXM_INIT_AUXTIMEREG 
MXM_INIT_ACQCFG 
MXM_INIT_UVTHSETREG 
MXM_INIT_OVTHSETREG 
MXM_INIT_BALEXP1 
MXM_INIT_BALEXP2 
MXM_INIT_BALEXP3 
MXM_INIT_BALEXP4 
MXM_INIT_BALEXP5 
MXM_INIT_BALEXP6 
MXM_INIT_BALEXP7 
MXM_INIT_BALEXP8 
MXM_INIT_BALEXP9 
MXM_INIT_BALEXP10 
MXM_INIT_BALEXP11 
MXM_INIT_BALEXP12 
MXM_INIT_BALEXP13 
MXM_INIT_BALEXP14 
MXM_INIT_BALSWDLY 
MXM_INIT_ALRTOVEN 
MXM_INIT_ALRTUVEN 
MXM_INIT_COMPOPNTHREG 
MXM_INIT_I2C_GET_STAT1 
MXM_INIT_I2C_CFG 
MXM_INIT_I2C_PNTR 
MXM_INIT_I2C_SEND_MUX0 
MXM_INIT_I2C_SEND_MUX1 
MXM_INIT_GET_I2C_STAT2 
MXM_OP_ENTRY_STATE 
MXM_OP_DIAGNOSTIC_ENTRY 
MXM_OP_DIAGNOSTIC_STATUS1 
MXM_OP_DIAGNOSTIC_STATUS2 
MXM_OP_DIAGNOSTIC_STATUS3 
MXM_OP_DIAGNOSTIC_FMEA1 
MXM_OP_DIAGNOSTIC_FMEA2 
MXM_OP_DIAGNOSTIC_CLEAR_STATUS2 
MXM_OP_DIAGNOSTIC_CLEAR_FMEA1 
MXM_OP_DIAGNOSTIC_CLEAR_FMEA2 
MXM_OP_DIAGNOSTIC_EXIT 
MXM_OP_SELECT_MUX_CHANNEL 
MXM_OP_WRITE_MUX0 
MXM_OP_WRITE_MUX1 
MXM_OP_SET_SCAN_STROBE 
MXM_OP_GET_SCAN_STROBE 
MXM_OP_GET_VOLTAGES 
MXM_OP_GET_ALRTSUM 
MXM_OP_PARSE_VOLTAGES_INTO_DB 
MXM_OP_PINOPEN_ENTRY 
MXM_OP_PINOPEN_EXIT 
MXM_OP_PINOPEN_SET_CURRENT_SOURCES 
MXM_OP_PINOPEN_COMPSCAN 
MXM_OP_PINOPEN_GET_SCAN_STROBE 
MXM_OP_PINOPEN_GET_ALRT 
MXM_OP_PINOPEN_PROCESS_OPENWIRE 
MXM_OP_PINOPEN_RESTORE_CURRENT_SOURCE_CONF 
MXM_OP_BAL_ENTRY 
MXM_OP_BAL_CONTROL_STOP_BALANCING 
MXM_OP_BAL_CONTROL_RESET_ALL 
MXM_OP_BAL_CONTROL_SET_ALL 
MXM_OP_BAL_START 
MXM_OP_BAL_READ_BALSTAT 
MXM_OP_BAL_EXIT 
MXM_OP_CYCLE_END_ENTRY 
MXM_OP_INCREMENT_MUX_COUNTER 
MXM_OP_CYCLE_END_EXIT 

Definition at line 92 of file mxm_1785x_tools.h.

◆ MXM_STATEMACHINE_STATES_e

States of the global Maxim state-machine.

State transitions are currently autonomous and will have to be integrated into the Battery System state-machine.

Enumerator
MXM_STATEMACHINE_STATES_UNINITIALIZED 

uninitialized state

MXM_STATEMACHINE_STATES_SELFCHECK_PRE_INIT 

self-check that has to be executed before initialization

MXM_STATEMACHINE_STATES_INIT 

initialization sequence

MXM_STATEMACHINE_STATES_SELFCHECK_POST_INIT 

self-check that has to be executed after initialization

MXM_STATEMACHINE_STATES_IDLE 

idle state, the driver waits for operation here

MXM_STATEMACHINE_STATES_OPERATION 

operating state, the measurement cycle is executed here

MXM_STATEMACHINE_STATES_MAXSTATE 

highest state

Definition at line 81 of file mxm_1785x_tools.h.

Function Documentation

◆ MXM_Convert()

void MXM_Convert ( uint8_t  lsb,
uint8_t  msb,
uint16_t *  pTarget,
MXM_CONVERSION_TYPE_e  convType,
uint32_t  fullScaleReference_mV 
)

Convert a measurement value to a voltage value.

This function converts measurement values from the monitoring IC into a voltage value. It assumes that measurement values are spread over the LSB and MSB according to the data sheet. This means that the two lowest bits are 0 and the 14-bit measurement is spread over the 14 highest bits.

The conversion type describes the kind of measurement that has been executed.

Parameters
[in]lsbLSB of the value
[in]msbMSB of the value
[out]pTargetpointer in which the converted value shall be written
[in]convTypetype of conversion (bipolar or unipolar)
[in]fullScaleReference_mVreference voltage of full scale (for voltage measurements 5000)

Definition at line 119 of file mxm_1785x_tools.c.

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◆ MXM_ConvertModuleToString()

void MXM_ConvertModuleToString ( const uint16_t  moduleNumber,
uint8_t *  pStringNumber,
uint16_t *  pModuleNumberInString 
)

Get the string and module number from a global module number.

Maxim driver knows only one string internally and maps on demand this one string onto several strings (for instances where several modules are in the same daisy-chain but belong to different strings).

This function assumes that a string contains BS_NR_OF_MODULES_PER_STRING modules in BS_NR_OF_STRINGS strings and that they are connected in a daisy-chain.

Parameters
[in]moduleNumbernumber of the module in the daisy-chain (starts with 0)
[out]pStringNumberpointer where the string number will be written
[out]pModuleNumberInStringmodule number in the string

Definition at line 269 of file mxm_1785x_tools.c.

◆ MXM_ConvertTest()

STD_RETURN_TYPE_e GEN_MUST_CHECK_RETURN MXM_ConvertTest ( void  )

Test the MXM_Convert()-function.

This test-function is intended as a self-check. It tests whether the MXM_Convert()-function computes the values as expected.

Returns
STD_OK on successful execution, otherwise STD_NOT_OK

Definition at line 156 of file mxm_1785x_tools.c.

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◆ MXM_ExtractValueFromRegister()

void MXM_ExtractValueFromRegister ( uint8_t  lsb,
uint8_t  msb,
MXM_REG_BM  bitmask,
uint16_t *  pValue 
)

Extract a value from a single register.

This function extracts a single value from a single register. The register has to be supplied as MSB and LSB. The bitmask has to be of type MXM_REG_BM. The extracted value will be written into value.

The function can only extract values from single registers (MSB and LSB)and does not handle values that span multiple registers.

Parameters
[in]lsbleast significant byte of the register
[in]msbmost significant byte of the register
[in]bitmaskbitmask for the value
[out]pValuepointer to a variable in which the value should be written

Definition at line 187 of file mxm_1785x_tools.c.

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◆ MXM_ExtractValueFromRegisterTest()

STD_RETURN_TYPE_e GEN_MUST_CHECK_RETURN MXM_ExtractValueFromRegisterTest ( void  )

Test MXM_ExtractValueFromRegister().

Self-check that tests whether MXM_ExtractValueFromRegister() works as expected.

Returns
STD_OK if the self-check has passed successfully

Definition at line 215 of file mxm_1785x_tools.c.

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◆ MXM_FirstSetBitTest()

STD_RETURN_TYPE_e GEN_MUST_CHECK_RETURN MXM_FirstSetBitTest ( void  )

Test MXM_FirstSetBit().

Tests the function MXM_FirstSetBit() if it works as expected.

Returns
STD_OK if the self-check has passed successfully

Definition at line 102 of file mxm_1785x_tools.c.

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◆ MXM_Unipolar14BitInto16Bit()

void MXM_Unipolar14BitInto16Bit ( uint16_t  inputValue,
uint8_t *  lsb,
uint8_t *  msb 
)

convert a unipolar 14bit-value and shifts it into the 16bit-format

Takes a value in the unipolar 14bit format and transforms it into a 16bit register entry for the monitoring IC (separated into LSB and MSB).

Parameters
[in]inputValueunipolar 14bit-value
[out]lsbLSB in 16bit-format
[out]msbMSB in 16bit-format

Definition at line 243 of file mxm_1785x_tools.c.

◆ MXM_VoltageIntoUnipolar14Bit()

uint16_t MXM_VoltageIntoUnipolar14Bit ( uint16_t  voltage_mV,
uint16_t  fullscaleReference_mV 
)

convert a voltage value into a unipolar 14bit value

Takes a voltage value in mV together with a reference for fullscale values into a unipolar 14bit value.

Parameters
[in]voltage_mVvoltage in mV
[in]fullscaleReference_mVvalue of the fullscale in mV; typically 5000
Returns
unipolar 14bit value for usage with MXM_Unipolar14BitInto16Bit()

Definition at line 258 of file mxm_1785x_tools.c.