foxBMS  1.1.2
The foxBMS Battery Management System API Documentation
ltc_6806_cfg.h File Reference

Header for the configuration for the LTC 6806 monitoring IC. More...

#include "ltc_cfg.h"
#include "ltc_defs.h"
#include "battery_system_cfg.h"
#include "ltc_mic_dma.h"
#include "spi.h"
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Macros

#define SLAVE_BOARD_VERSION   (2)
 
#define LTC_PORTEXPANDER_VERSION   (1)
 
#define LTC_PORTEXPANDER_ADR_TI   (0)
 
#define LTC_DISCARD_PEC   (false)
 
#define LTC_N_MUX_PER_LTC   (3)
 
#define LTC_N_MUX_CHANNELS_PER_MUX   (8)
 
#define LTC_NUMBER_OF_MUX_MEASUREMENTS_PER_CYCLE   (8)
 
#define LTC_N_MUX_CHANNELS_PER_LTC   (LTC_N_MUX_PER_LTC * LTC_N_MUX_CHANNELS_PER_MUX)
 
#define LTC_NUMBER_OF_LTC_PER_MODULE   (1u)
 
#define LTC_HIRNG   (0u)
 
#define LTC_FUEL_CELL_ADOW_TIME_MS   (100U + 1U)
 
#define LTC_ADOW_THRESHOLD   (-200)
 
#define LTC_VOLTAGE_MEASUREMENT_MODE   (LTC_ADCMODE_NORMAL_DCP0)
 
#define LTC_GPIO_MEASUREMENT_MODE   (LTC_ADCMODE_NORMAL_DCP0)
 
#define LTC_OW_MEASUREMENT_MODE   (LTC_ADCMODE_NORMAL_DCP0)
 
#define LTC_TRANSMISSION_TIMEOUT   (10)
 
#define LTC_TWAKE_US   (300)
 
#define LTC_TREADY_US   (10)
 
#define LTC_TIDLE_US   (6700)
 
#define LTC_SPI_WAKEUP_WAIT_TIME_US   (30U)
 
#define LTC_FUELCELL_NORMAL_ALL_CELLS_MS   (11)
 
#define LTC_STATEMACH_SHORTTIME   (1)
 
#define LTC_STATEMACH_DAISY_CHAIN_FIRST_INITIALIZATION_TIME   ((LTC_TWAKE_US * LTC_N_LTC) / 1000)
 
#define LTC_STATEMACH_DAISY_CHAIN_SECOND_INITIALIZATION_TIME   ((LTC_TREADY_US * LTC_N_LTC) / 1000)
 
#define LTC_STATEMACH_MEAS_ALL_FAST_TCYCLE   (2)
 
#define LTC_STATEMACH_MEAS_ALL_NORMAL_TCYCLE   (3)
 
#define LTC_STATEMACH_MEAS_ALL_FILTERED_TCYCLE   (202)
 
#define LTC_STATEMACH_MEAS_SINGLE_FAST_TCYCLE   (1)
 
#define LTC_STATEMACH_MEAS_SINGLE_NORMAL_TCYCLE   (1)
 
#define LTC_STATEMACH_MEAS_SINGLE_FILTERED_TCYCLE   (35)
 
#define LTC_STATEMACH_SEQERRTTIME   (5)
 
#define LTC_STATEMACH_PECERRTIME   (1)
 
#define LTC_TRANSMIT_PECERRLIMIT   (10)
 
#define LTC_TRANSMIT_SPIERRLIMIT   (3)
 
#define LTC_READCOM   (0)
 
#define LTC_STANDBY_PERIODIC_OPEN_WIRE_CHECK   (false)
 
#define LTC_STANDBY_OPEN_WIRE_PERIOD_ms   (600000)
 
#define LTC_NORMAL_PERIODIC_OPEN_WIRE_CHECK   (false)
 
#define LTC_NORMAL_OPEN_WIRE_PERIOD_ms   (600000)
 
#define LTC_CHARGE_PERIODIC_OPEN_WIRE_CHECK   (false)
 
#define LTC_CHARGE_OPEN_WIRE_PERIOD_ms   (600000)
 
#define LTC_ERROR_OPEN_WIRE_PERIOD_ms   (30000)
 
#define LTC_NMBR_REQ_ADOW_COMMANDS   (2)
 
#define LTC_SPI_HANDLE   &spi_devices[0]
 
#define LTC_SPI_INSTANCE   *LTC_SPI_HANDLE.Instance
 
#define LTC_SPI_PRESCALER   *LTC_SPI_HANDLE.Init.BaudRatePrescaler
 
#define LTC_TransmitWakeUp(spi_ltcInterface)   SPI_TransmitDummyByte(spi_ltcInterface, LTC_SPI_WAKEUP_WAIT_TIME_US)
 
#define LTC_TransmitI2cCommand(spi_ltcInterface, txbuf)    SPI_TransmitDataWithDummy(spi_ltcInterface, LTC_SPI_WAKEUP_WAIT_TIME_US, txbuf, 4 + 9)
 
#define LTC_TransmitCommand(spi_ltcInterface, command)    SPI_TransmitDataWithDummy(spi_ltcInterface, LTC_SPI_WAKEUP_WAIT_TIME_US, command, 4)
 
#define LTC_TransmitReceiveData(spi_ltcInterface, txbuf, rxbuf, length)    SPI_TransmitReceiveDataWithDummyDma(spi_ltcInterface, LTC_SPI_WAKEUP_WAIT_TIME_US, txbuf, rxbuf, length)
 

Functions

int16_t LTC_Convert_MuxVoltages_to_Temperatures (uint16_t adcVoltage_mV)
 converts a raw voltage from multiplexer to a temperature value in deci °C. More...
 

Variables

const uint8_t ltc_muxsensortemperatur_cfg [BS_NR_OF_TEMP_SENSORS_PER_MODULE]
 
const uint8_t ltc_voltage_input_used [BS_MAX_SUPPORTED_CELLS]
 

Detailed Description

Header for the configuration for the LTC 6806 monitoring IC.

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:

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Author
foxBMS Team
Date
2015-02-18 (date of creation)
Updated
2021-03-24 (date of last update)
Prefix
LTC

Definition in file ltc_6806_cfg.h.

Macro Definition Documentation

◆ LTC_ADOW_THRESHOLD

#define LTC_ADOW_THRESHOLD   (-200)

Open-wire detection threshold

Definition at line 116 of file ltc_6806_cfg.h.

◆ LTC_CHARGE_OPEN_WIRE_PERIOD_ms

#define LTC_CHARGE_OPEN_WIRE_PERIOD_ms   (600000)

Periodic open-wire check time in CHARGE state in ms

Definition at line 270 of file ltc_6806_cfg.h.

◆ LTC_CHARGE_PERIODIC_OPEN_WIRE_CHECK

#define LTC_CHARGE_PERIODIC_OPEN_WIRE_CHECK   (false)

open-wire check in charge mode (set to true or false)

Definition at line 267 of file ltc_6806_cfg.h.

◆ LTC_DISCARD_PEC

#define LTC_DISCARD_PEC   (false)

Controls if PEC should be discarded (true) or not (false)

Definition at line 88 of file ltc_6806_cfg.h.

◆ LTC_ERROR_OPEN_WIRE_PERIOD_ms

#define LTC_ERROR_OPEN_WIRE_PERIOD_ms   (30000)

Periodic open-wire check time in ERROR state in ms

Definition at line 273 of file ltc_6806_cfg.h.

◆ LTC_FUEL_CELL_ADOW_TIME_MS

#define LTC_FUEL_CELL_ADOW_TIME_MS   (100U + 1U)

Open-wire voltage measurement time for fuel cells

Definition at line 113 of file ltc_6806_cfg.h.

◆ LTC_FUELCELL_NORMAL_ALL_CELLS_MS

#define LTC_FUELCELL_NORMAL_ALL_CELLS_MS   (11)

Time to measure all fuel cells in normal mode 10280 µs

Definition at line 167 of file ltc_6806_cfg.h.

◆ LTC_GPIO_MEASUREMENT_MODE

#define LTC_GPIO_MEASUREMENT_MODE   (LTC_ADCMODE_NORMAL_DCP0)

Measurement modus for GPIOs, possible values:

  • LTC_ADCMODE_NORMAL_DCP0
  • LTC_ADCMODE_FILTERED_DCP0
  • LTC_ADCMODE_FAST_DCP0

Definition at line 132 of file ltc_6806_cfg.h.

◆ LTC_HIRNG

#define LTC_HIRNG   (0u)

Voltage measurement range for fuel cells LSB = 1.5 mV if HIRNG = 0u LSB = 3.0 mV if HIRNG = 1u

Definition at line 110 of file ltc_6806_cfg.h.

◆ LTC_N_MUX_CHANNELS_PER_LTC

#define LTC_N_MUX_CHANNELS_PER_LTC   (LTC_N_MUX_PER_LTC * LTC_N_MUX_CHANNELS_PER_MUX)

Number of multiplexed channels per LTC-IC

Definition at line 100 of file ltc_6806_cfg.h.

◆ LTC_N_MUX_CHANNELS_PER_MUX

#define LTC_N_MUX_CHANNELS_PER_MUX   (8)

Number of channels per multiplexer

Definition at line 94 of file ltc_6806_cfg.h.

◆ LTC_N_MUX_PER_LTC

#define LTC_N_MUX_PER_LTC   (3)

Number of multiplexer used per LTC-IC

Definition at line 91 of file ltc_6806_cfg.h.

◆ LTC_NMBR_REQ_ADOW_COMMANDS

#define LTC_NMBR_REQ_ADOW_COMMANDS   (2)

Number of required ADOW commands because of external C-Pin capacitance and the respective duration to perform an open wire check for 14 modules with 12 cells each. During this time no cell voltages and temperatures are measured! +-------------—+-----------—+------------—+-------—+-------—+ | External C pin | Normal mode | Filtered mode | Duration | Duration | | capacitance | | | normal | filtered | | ------------—+-----------—+------------—+-------—+-------—+ | <= 10nF | 2 | 2 | 32ms | 828ms | | 100nF | 10 | 2 | 112ms | 828ms | | 1uF | 100 | 2 | 1012ms | 828ms | | C | 1.5+(C/10nF) | 2 | | | +-------------—+-----------—+------------—+-------—+-------—+

Definition at line 289 of file ltc_6806_cfg.h.

◆ LTC_NORMAL_OPEN_WIRE_PERIOD_ms

#define LTC_NORMAL_OPEN_WIRE_PERIOD_ms   (600000)

Periodic open-wire check time in NORMAL state in ms

Definition at line 264 of file ltc_6806_cfg.h.

◆ LTC_NORMAL_PERIODIC_OPEN_WIRE_CHECK

#define LTC_NORMAL_PERIODIC_OPEN_WIRE_CHECK   (false)

open-wire check in normal mode (set to true or false)

Definition at line 261 of file ltc_6806_cfg.h.

◆ LTC_NUMBER_OF_LTC_PER_MODULE

#define LTC_NUMBER_OF_LTC_PER_MODULE   (1u)

Number of LTC-ICs per battery module

Definition at line 103 of file ltc_6806_cfg.h.

◆ LTC_NUMBER_OF_MUX_MEASUREMENTS_PER_CYCLE

#define LTC_NUMBER_OF_MUX_MEASUREMENTS_PER_CYCLE   (8)

Number of multiplexer measurements per LTC cycle

Definition at line 97 of file ltc_6806_cfg.h.

◆ LTC_OW_MEASUREMENT_MODE

#define LTC_OW_MEASUREMENT_MODE   (LTC_ADCMODE_NORMAL_DCP0)

Measurement modus for Open-wire check, possible values:

  • LTC_ADCMODE_NORMAL_DCP0
  • LTC_ADCMODE_FILTERED_DCP0

Definition at line 139 of file ltc_6806_cfg.h.

◆ LTC_PORTEXPANDER_ADR_TI

#define LTC_PORTEXPANDER_ADR_TI   (0)

Address of TI port expander (0 or 1)

Definition at line 85 of file ltc_6806_cfg.h.

◆ LTC_PORTEXPANDER_VERSION

#define LTC_PORTEXPANDER_VERSION   (1)

If set to 0 LTC driver is configured to use PCA8574 port expander If set to 1 LTC driver is configured to use TCA6408A port expander

Definition at line 80 of file ltc_6806_cfg.h.

◆ LTC_READCOM

#define LTC_READCOM   (0)

If set to 1, check if multiplexers acknowledged transmission

Definition at line 245 of file ltc_6806_cfg.h.

◆ LTC_SPI_HANDLE

#define LTC_SPI_HANDLE   &spi_devices[0]

SPI1 is used for communication with LTC

Definition at line 151 of file ltc_6806_cfg.h.

◆ LTC_SPI_INSTANCE

#define LTC_SPI_INSTANCE   *LTC_SPI_HANDLE.Instance

SPI1 is used for communication with LTC

Definition at line 152 of file ltc_6806_cfg.h.

◆ LTC_SPI_PRESCALER

#define LTC_SPI_PRESCALER   *LTC_SPI_HANDLE.Init.BaudRatePrescaler

SPI1 is used for communication with LTC

Definition at line 153 of file ltc_6806_cfg.h.

◆ LTC_SPI_WAKEUP_WAIT_TIME_US

#define LTC_SPI_WAKEUP_WAIT_TIME_US   (30U)

LTC SPI wakeup time

Definition at line 164 of file ltc_6806_cfg.h.

◆ LTC_STANDBY_OPEN_WIRE_PERIOD_ms

#define LTC_STANDBY_OPEN_WIRE_PERIOD_ms   (600000)

Periodic open-wire check time in STANDBY state in ms

Definition at line 258 of file ltc_6806_cfg.h.

◆ LTC_STANDBY_PERIODIC_OPEN_WIRE_CHECK

#define LTC_STANDBY_PERIODIC_OPEN_WIRE_CHECK   (false)

----------------— OPEN WIRE CHECK ---------------------— If open-wire check is performed cell voltages and temperatures are not updated and thus old values can be transmitted on the CAN bus. Check time is dependent on module configuration and external capacitance. Activate open-wire check with care! See table below for various measured open-wire check durations! (set to true or false)

Definition at line 255 of file ltc_6806_cfg.h.

◆ LTC_STATEMACH_DAISY_CHAIN_FIRST_INITIALIZATION_TIME

#define LTC_STATEMACH_DAISY_CHAIN_FIRST_INITIALIZATION_TIME   ((LTC_TWAKE_US * LTC_N_LTC) / 1000)

time for the first initialization of the daisy chain see LTC6804 datasheet page 41

Definition at line 176 of file ltc_6806_cfg.h.

◆ LTC_STATEMACH_DAISY_CHAIN_SECOND_INITIALIZATION_TIME

#define LTC_STATEMACH_DAISY_CHAIN_SECOND_INITIALIZATION_TIME   ((LTC_TREADY_US * LTC_N_LTC) / 1000)

time for the second initialization of the daisy chain see LTC6804 datasheet page 41

Definition at line 181 of file ltc_6806_cfg.h.

◆ LTC_STATEMACH_MEAS_ALL_FAST_TCYCLE

#define LTC_STATEMACH_MEAS_ALL_FAST_TCYCLE   (2)

~1.1ms Measurement+Calibration Cycle Time When Starting from the REFUP State in Fast Mode unit: ms

Definition at line 191 of file ltc_6806_cfg.h.

◆ LTC_STATEMACH_MEAS_ALL_FILTERED_TCYCLE

#define LTC_STATEMACH_MEAS_ALL_FILTERED_TCYCLE   (202)

~201ms Measurement+Calibration Cycle Time When Starting from the REFUP State in Filtered Mode unit: ms

Definition at line 203 of file ltc_6806_cfg.h.

◆ LTC_STATEMACH_MEAS_ALL_NORMAL_TCYCLE

#define LTC_STATEMACH_MEAS_ALL_NORMAL_TCYCLE   (3)

~2.3ms Measurement+Calibration Cycle Time When Starting from the REFUP State in Normal Mode unit: ms

Definition at line 197 of file ltc_6806_cfg.h.

◆ LTC_STATEMACH_MEAS_SINGLE_FAST_TCYCLE

#define LTC_STATEMACH_MEAS_SINGLE_FAST_TCYCLE   (1)

~0.201ms Measurement+Calibration Cycle Time When Starting from the REFUP State in Fast Mode unit: ms

Definition at line 213 of file ltc_6806_cfg.h.

◆ LTC_STATEMACH_MEAS_SINGLE_FILTERED_TCYCLE

#define LTC_STATEMACH_MEAS_SINGLE_FILTERED_TCYCLE   (35)

~34 ms Measurement+Calibration Cycle Time When Starting from the REFUP State in Filtered Mode unit: ms

Definition at line 225 of file ltc_6806_cfg.h.

◆ LTC_STATEMACH_MEAS_SINGLE_NORMAL_TCYCLE

#define LTC_STATEMACH_MEAS_SINGLE_NORMAL_TCYCLE   (1)

~0.405ms Measurement+Calibration Cycle Time When Starting from the REFUP State in Normal Mode unit: ms

Definition at line 219 of file ltc_6806_cfg.h.

◆ LTC_STATEMACH_PECERRTIME

#define LTC_STATEMACH_PECERRTIME   (1)

LTC statemachine CRC-transmission error timing in ms

Definition at line 230 of file ltc_6806_cfg.h.

◆ LTC_STATEMACH_SEQERRTTIME

#define LTC_STATEMACH_SEQERRTTIME   (5)

LTC statemachine sequence error timing in ms

Definition at line 228 of file ltc_6806_cfg.h.

◆ LTC_STATEMACH_SHORTTIME

#define LTC_STATEMACH_SHORTTIME   (1)

LTC statemachine short time definition in ms

Definition at line 170 of file ltc_6806_cfg.h.

◆ LTC_TIDLE_US

#define LTC_TIDLE_US   (6700)

start definition of LTC timings; Tidle (see LTC datasheet)

Definition at line 161 of file ltc_6806_cfg.h.

◆ LTC_TRANSMISSION_TIMEOUT

#define LTC_TRANSMISSION_TIMEOUT   (10)

Timeout in milliseconds added to the transmission time for interrupt-based SPI transmission.

Definition at line 145 of file ltc_6806_cfg.h.

◆ LTC_TRANSMIT_PECERRLIMIT

#define LTC_TRANSMIT_PECERRLIMIT   (10)

Maximum number of re-tries in case of CRC error during the communication with daisy chain before going into error state

Definition at line 236 of file ltc_6806_cfg.h.

◆ LTC_TRANSMIT_SPIERRLIMIT

#define LTC_TRANSMIT_SPIERRLIMIT   (3)

Maximum number of re-tries in case of SPI error during the communication with daisy chain before going into error state

Definition at line 242 of file ltc_6806_cfg.h.

◆ LTC_TransmitCommand

#define LTC_TransmitCommand (   spi_ltcInterface,
  command 
)     SPI_TransmitDataWithDummy(spi_ltcInterface, LTC_SPI_WAKEUP_WAIT_TIME_US, command, 4)

Transmit functions

Definition at line 298 of file ltc_6806_cfg.h.

◆ LTC_TransmitI2cCommand

#define LTC_TransmitI2cCommand (   spi_ltcInterface,
  txbuf 
)     SPI_TransmitDataWithDummy(spi_ltcInterface, LTC_SPI_WAKEUP_WAIT_TIME_US, txbuf, 4 + 9)

Transmit functions

Definition at line 296 of file ltc_6806_cfg.h.

◆ LTC_TransmitReceiveData

#define LTC_TransmitReceiveData (   spi_ltcInterface,
  txbuf,
  rxbuf,
  length 
)     SPI_TransmitReceiveDataWithDummyDma(spi_ltcInterface, LTC_SPI_WAKEUP_WAIT_TIME_US, txbuf, rxbuf, length)

Transmit functions

Definition at line 300 of file ltc_6806_cfg.h.

◆ LTC_TransmitWakeUp

Transmit functions

Definition at line 295 of file ltc_6806_cfg.h.

◆ LTC_TREADY_US

#define LTC_TREADY_US   (10)

start definition of LTC timings; Tready (see LTC datasheet)

Definition at line 159 of file ltc_6806_cfg.h.

◆ LTC_TWAKE_US

#define LTC_TWAKE_US   (300)

start definition of LTC timings; Twake (see LTC datasheet)

Definition at line 157 of file ltc_6806_cfg.h.

◆ LTC_VOLTAGE_MEASUREMENT_MODE

#define LTC_VOLTAGE_MEASUREMENT_MODE   (LTC_ADCMODE_NORMAL_DCP0)

Measurement modus for voltages, possible values:

  • LTC_ADCMODE_NORMAL_DCP0
  • LTC_ADCMODE_FILTERED_DCP0
  • LTC_ADCMODE_FAST_DCP0

Definition at line 124 of file ltc_6806_cfg.h.

◆ SLAVE_BOARD_VERSION

#define SLAVE_BOARD_VERSION   (2)

If set to 1 LTC driver is configured to use foxBMS slave boards version 1.x If set to 2 LTC driver is configured to use foxBMS slave boards version 2.x

Definition at line 74 of file ltc_6806_cfg.h.

Function Documentation

◆ LTC_Convert_MuxVoltages_to_Temperatures()

int16_t LTC_Convert_MuxVoltages_to_Temperatures ( uint16_t  adcVoltage_mV)

converts a raw voltage from multiplexer to a temperature value in deci °C.

The temperatures are read from NTC elements via voltage dividers. This function implements the look-up table between voltage and temperature, taking into account the NTC characteristics and the voltage divider.

Parameters
adcVoltage_mVvoltage read from the multiplexer in mV
Returns
temperature value in deci °C

Definition at line 225 of file ltc_6813-1_cfg.c.

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Variable Documentation

◆ ltc_muxsensortemperatur_cfg

const uint8_t ltc_muxsensortemperatur_cfg[BS_NR_OF_TEMP_SENSORS_PER_MODULE]
extern

On the foxBMS slave board there are 6 multiplexer inputs dedicated to temperature sensors by default. Lookup table between temperature sensors and battery cells

Definition at line 183 of file ltc_6813-1_cfg.c.

◆ ltc_voltage_input_used

const uint8_t ltc_voltage_input_used[BS_MAX_SUPPORTED_CELLS]
extern

Lookup table to indicate which voltage inputs are used

Definition at line 63 of file ltc_6806_cfg.c.