ltc_6806_cfg.h

Go to the documentation of this file.

/**
 *
 * @copyright © 2010 - 2023, 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®″
 * - ″This product includes parts of foxBMS®″
 * - ″This product is derived from foxBMS®″
 *
 */
 
/**
 * @file    ltc_6806_cfg.h
 * @author  foxBMS Team
 * @date    2015-02-18 (date of creation)
 * @updated 2023-10-12 (date of last update)
 * @version v1.6.0
 * @ingroup DRIVERS_CONFIGURATION
 * @prefix  LTC
 *
 * @brief   Header for the configuration for the LTC 6806 monitoring IC
 *
 */
 
#ifndef FOXBMS__LTC_6806_CFG_H_
#define FOXBMS__LTC_6806_CFG_H_
 
/*========== Includes =======================================================*/
/* clang-format off */
#include "ltc_cfg.h"
/* clang-format on */
 
#include "ltc_defs.h"
#include "battery_system_cfg.h"
 
#include "ltc_afe_dma.h"
#include "spi.h"
 
#include <stdint.h>
 
/*========== Macros and Definitions =========================================*/
/**
 * 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
 */
#define SLAVE_BOARD_VERSION (2)
 
/**
 * 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
 */
#define LTC_PORTEXPANDER_VERSION (1)
 
/**
 * @def     LTC_6806_MAX_SUPPORTED_CELLS
 * @brief   Defines the maximal number of supported cells per module
 */
#define LTC_6806_MAX_SUPPORTED_CELLS (36u)
 
#if BS_NR_OF_CELL_BLOCKS_PER_MODULE > LTC_6806_MAX_SUPPORTED_CELLS
#error "Number of cell blocks per module cannot be higher than maximum number of cells per module"
#endif
 
/**
 * Address of TI port expander (0 or 1)
 */
#define LTC_PORTEXPANDER_ADR_TI (0)
 
/** Controls if PEC should be discarded (true) or not (false) */
#define LTC_DISCARD_PEC (false)
 
/** Number of multiplexer used per LTC-IC */
#define LTC_N_MUX_PER_LTC (3)
 
/** Number of channels per multiplexer */
#define LTC_N_MUX_CHANNELS_PER_MUX (8)
 
/** Number of multiplexer measurements per LTC cycle */
#define LTC_NUMBER_OF_MUX_MEASUREMENTS_PER_CYCLE (8)
 
/** Number of multiplexed channels per LTC-IC */
#define LTC_N_MUX_CHANNELS_PER_LTC (LTC_N_MUX_PER_LTC * LTC_N_MUX_CHANNELS_PER_MUX)
 
/** Number of LTC-ICs per battery module */
#define LTC_NUMBER_OF_LTC_PER_MODULE (1u)
 
/**
 * Voltage measurement range for fuel cells
 * LSB = 1.5 mV if HIRNG = 0u
 * LSB = 3.0 mV if HIRNG = 1u
 */
#define LTC_HIRNG (0u)
 
/** Open-wire voltage measurement time for fuel cells */
#define LTC_FUEL_CELL_ADOW_TIME_MS (100u + 1u)
 
/** Open-wire detection threshold */
#define LTC_ADOW_THRESHOLD (-200)
 
/**
 * Measurement modus for voltages, possible values:
 * - LTC_ADCMODE_NORMAL_DCP0
 * - LTC_ADCMODE_FILTERED_DCP0
 * - LTC_ADCMODE_FAST_DCP0
 */
#define LTC_VOLTAGE_MEASUREMENT_MODE (LTC_ADCMODE_NORMAL_DCP0)
 
/**
 * Measurement modus for GPIOs, possible values:
 * - LTC_ADCMODE_NORMAL_DCP0
 * - LTC_ADCMODE_FILTERED_DCP0
 * - LTC_ADCMODE_FAST_DCP0
 */
#define LTC_GPIO_MEASUREMENT_MODE (LTC_ADCMODE_NORMAL_DCP0)
 
/**
 * Measurement modus for Open-wire check, possible values:
 * - LTC_ADCMODE_NORMAL_DCP0
 * - LTC_ADCMODE_FILTERED_DCP0
 */
#define LTC_OW_MEASUREMENT_MODE (LTC_ADCMODE_NORMAL_DCP0)
 
/**
 * Timeout in milliseconds added to the transmission time for interrupt-based
 * SPI transmission.
 */
#define LTC_TRANSMISSION_TIMEOUT (10)
 
/**
 * SPI1 is used for communication with LTC
 * @{
 */
#define LTC_SPI_HANDLE    &spi_devices[0]
#define LTC_SPI_INSTANCE  *LTC_SPI_HANDLE.Instance
#define LTC_SPI_PRESCALER *LTC_SPI_HANDLE.Init.BaudRatePrescaler
/**@}*/
 
/** start definition of LTC timings; Twake (see LTC data sheet) */
#define LTC_TWAKE_US (300)
/** start definition of LTC timings; Tready (see LTC data sheet) */
#define LTC_TREADY_US (10)
/** start definition of LTC timings; Tidle (see LTC data sheet) */
#define LTC_TIDLE_US (6700)
 
/** LTC SPI wakeup time */
#define LTC_SPI_WAKEUP_WAIT_TIME_US (30u)
 
/** Time to measure all fuel cells in normal mode 10280 &micro;s */
#define LTC_FUELCELL_NORMAL_ALL_CELLS_MS (11)
 
/** LTC state machine short time definition in ms */
#define LTC_STATEMACH_SHORTTIME (1)
 
/**
 * time for the first initialization of the daisy chain
 * see LTC6804 data sheet page 41
 */
#define LTC_STATEMACH_DAISY_CHAIN_FIRST_INITIALIZATION_TIME ((LTC_TWAKE_US * LTC_N_LTC) / 1000)
/**
 * time for the second initialization of the daisy chain
 * see LTC6804 data sheet page 41
 */
#define LTC_STATEMACH_DAISY_CHAIN_SECOND_INITIALIZATION_TIME ((LTC_TREADY_US * LTC_N_LTC) / 1000)
 
/*
 * Timings of Voltage Cell and GPIO measurement for all cells or all GPIO
 */
 
/**
 * ~1.1ms Measurement+Calibration Cycle Time When Starting from the REFUP State in Fast Mode
 * unit: ms
 */
#define LTC_STATEMACH_MEAS_ALL_FAST_TCYCLE (2)
 
/**
 * ~2.3ms Measurement+Calibration Cycle Time When Starting from the REFUP State in Normal Mode
 * unit: ms
 */
#define LTC_STATEMACH_MEAS_ALL_NORMAL_TCYCLE (3)
 
/**
 * ~201ms Measurement+Calibration Cycle Time When Starting from the REFUP State in Filtered Mode
 * unit: ms
 */
#define LTC_STATEMACH_MEAS_ALL_FILTERED_TCYCLE (202)
 
/*
 * Timings of Voltage Cell and GPIO measurement for a pair of cells or a single GPIO
 */
 
/**
 *  ~0.201ms Measurement+Calibration Cycle Time When Starting from the REFUP State in Fast Mode
 *  unit: ms
 */
#define LTC_STATEMACH_MEAS_SINGLE_FAST_TCYCLE (1)
 
/**
 * ~0.405ms Measurement+Calibration Cycle Time When Starting from the REFUP State in Normal Mode
 * unit: ms
 */
#define LTC_STATEMACH_MEAS_SINGLE_NORMAL_TCYCLE (1)
 
/**
 * ~34 ms Measurement+Calibration Cycle Time When Starting from the REFUP State in Filtered Mode
 * unit: ms
 */
#define LTC_STATEMACH_MEAS_SINGLE_FILTERED_TCYCLE (35)
 
/** LTC state machine sequence error timing in ms */
#define LTC_STATEMACH_SEQERRTTIME (5)
/** LTC state machine CRC-transmission error timing in ms */
#define LTC_STATEMACH_PECERRTIME (1)
 
/**
 * Maximum number of re-tries in case of CRC error during the communication with daisy chain
 * before going into error state
 */
#define LTC_TRANSMIT_PECERRLIMIT (10)
 
/**
 * Maximum number of re-tries in case of SPI error during the communication with daisy chain
 * before going into error state
 */
#define LTC_TRANSMIT_SPIERRLIMIT (3)
 
/** If set to 1, check if multiplexers acknowledged transmission */
#define LTC_READCOM (0)
 
/**
 * 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      |          |          |
 * +----------------+--------------+---------------+----------+----------+
 */
#define LTC_NMBR_REQ_ADOW_COMMANDS (2)
 
/**
 * Transmit functions
 * @{
 */
#define LTC_TRANSMIT_WAKE_UP(spi_ltcInterface) SPI_TransmitDummyByte(spi_ltcInterface, LTC_SPI_WAKEUP_WAIT_TIME_US)
#define LTC_TRANSMIT_I2C_COMMAND(spi_ltcInterface, txbuf)                 \
    SPI_TransmitDummyByte(spi_ltcInterface, LTC_SPI_WAKEUP_WAIT_TIME_US); \
    SPI_TransmitData(spi_ltcInterface, txbuf, 4 + 9)
#define LTC_TRANSMIT_COMMAND(spi_ltcInterface, command)                   \
    SPI_TransmitDummyByte(spi_ltcInterface, LTC_SPI_WAKEUP_WAIT_TIME_US); \
    SPI_TransmitData(spi_ltcInterface, command, 4)
#define LTC_TRANSMIT_RECEIVE_DATA(spi_ltcInterface, txbuf, rxbuf, length) \
    SPI_TransmitDummyByte(spi_ltcInterface, LTC_SPI_WAKEUP_WAIT_TIME_US); \
    SPI_TransmitReceiveDataDma(spi_ltcInterface, txbuf, rxbuf, length)
/**@}*/
 
/*========== Extern Constant and Variable Declarations ======================*/
 
/**
 * On the foxBMS slave board there are 6 multiplexer inputs dedicated to temperature
 * sensors by default.
 * Lookup table between temperature sensors and battery cells
 */
extern const uint8_t ltc_muxsensortemperatur_cfg[BS_NR_OF_TEMP_SENSORS_PER_MODULE];
 
/** Lookup table to indicate which voltage inputs are used */
extern const uint8_t ltc_voltage_input_used[LTC_6806_MAX_SUPPORTED_CELLS];
 
/*========== Extern Function Prototypes =====================================*/
 
/**
 * @brief   converts a raw voltage from multiplexer to a temperature value in
 *          deci &deg;C.
 * @details 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.
 * @param   adcVoltage_mV   voltage read from the multiplexer in mV
 * @return  temperature value in deci &deg;C
 */
extern int16_t LTC_ConvertMuxVoltagesToTemperatures(uint16_t adcVoltage_mV);
 
/*========== Externalized Static Functions Prototypes (Unit Test) ===========*/
#ifdef UNITY_UNIT_TEST
#endif
 
#endif /* FOXBMS__LTC_6806_CFG_H_ */