Header for the configuration for the MC33775A analog front-end. More...

#include "battery_system_cfg.h"
#include "nxp_afe_dma.h"
#include "nxp_mc33775a_defs.h"
#include "spi.h"
#include <stdint.h>

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Macros
#define	N775_MAXIMUM_NUMBER_OF_SUPPORTED_CELL_MEASUREMENTS (14u)

#define	N775_I2C_NR_BYTES_FOR_MUX_WRITE (4u)

#define	N775_I2C_NR_BYTES_TO_SWITCH_TO_READ_FOR_UX_READ (2u)

#define	N775_NOTIFICATION_TX_INDEX (1u)

#define	N775_NOTIFICATION_RX_INDEX (2u)

#define	N775_NO_NOTIFIED_VALUE (0x0u)

#define	N775_TX_NOTIFIED_VALUE (0x50u)

#define	N775_RX_NOTIFIED_VALUE (0x60u)

#define	N775_NOTIFICATION_TX_TIMEOUT_ms (1u)

#define	N775_NOTIFICATION_RX_TIMEOUT_ms (2u)

#define	N775_N_N775 (BS_NR_OF_MODULES_PER_STRING)

#define	N775_NUMBER_OF_N775_PER_MODULE (1u)

#define	N775_TX_MESSAGE_LENGTH (7u)

#define	N775_RX_MESSAGE_LENGTH (4u)

#define	N775_TRANSMISSION_TIMEOUT (10u)

#define	N775_TWAKECOM_MS (3u)

#define	N775_TDWAKE_MS (4u)

#define	N775_TIME_DAISYCHAIN_WAKEUP_MS (N775_N_N775 * (N775_TWAKECOM_MS + N775_TDWAKE_MS))

#define	N775_TIME_BETWEEN_WAKEUP_MS (4u)

#define	N775_TIME_AFTER_ENUMERATION_MS (1u)

#define	N775_TRANSMIT_SPIERRLIMIT (3u)

#define	N775_MAX_N_BYTES_FOR_DATA_RECEPTION (N775_TX_MESSAGE_LENGTH * N775_MAX_NUMBER_OF_VOLTAGES)

Functions
int16_t	N775_ConvertVoltagesToTemperatures (uint16_t adcVoltage_mV)
	converts a raw voltage from multiplexer to a temperature value in deci °C. More...

Variables
N775_MUX_CH_CFG_s	n775_muxSequence [N775_MUX_SEQUENCE_LENGTH]

Detailed Description

Header for the configuration for the MC33775A analog front-end.

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:

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.

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Author: foxBMS Team

Date: 2020-05-08 (date of creation)

Updated: 2023-10-12 (date of last update)

Version: v1.6.0

Prefix: N775

Definition in file nxp_mc33775a_cfg.h.

Macro Definition Documentation

◆ N775_I2C_NR_BYTES_FOR_MUX_WRITE

#define N775_I2C_NR_BYTES_FOR_MUX_WRITE (4u)

Number of bytes to be sent over I2C to write and read I2C mux register in order to choose channel

Definition at line 75 of file nxp_mc33775a_cfg.h.

◆ N775_I2C_NR_BYTES_TO_SWITCH_TO_READ_FOR_UX_READ

#define N775_I2C_NR_BYTES_TO_SWITCH_TO_READ_FOR_UX_READ (2u)

Number of bytes in I2C transaction after which the I2C bus should change to read

Definition at line 78 of file nxp_mc33775a_cfg.h.

◆ N775_MAX_N_BYTES_FOR_DATA_RECEPTION

#define N775_MAX_N_BYTES_FOR_DATA_RECEPTION (N775_TX_MESSAGE_LENGTH * N775_MAX_NUMBER_OF_VOLTAGES)

Max number of Bytes to be received from daisy-chain This limit is not due to the hardware. It is only to set the length of the receive buffer for DMA.

Definition at line 175 of file nxp_mc33775a_cfg.h.

◆ N775_MAXIMUM_NUMBER_OF_SUPPORTED_CELL_MEASUREMENTS

#define N775_MAXIMUM_NUMBER_OF_SUPPORTED_CELL_MEASUREMENTS (14u)

Definition at line 68 of file nxp_mc33775a_cfg.h.

◆ N775_N_N775

#define N775_N_N775 (BS_NR_OF_MODULES_PER_STRING)

Number of used N775-ICs

Definition at line 114 of file nxp_mc33775a_cfg.h.

◆ N775_NO_NOTIFIED_VALUE

#define N775_NO_NOTIFIED_VALUE (0x0u)

Default notification value, signals that no notification was received

Definition at line 91 of file nxp_mc33775a_cfg.h.

◆ N775_NOTIFICATION_RX_INDEX

#define N775_NOTIFICATION_RX_INDEX (2u)

Index used for FreeRTOS notification sent when RX DMA interrupt comes

Definition at line 87 of file nxp_mc33775a_cfg.h.

◆ N775_NOTIFICATION_RX_TIMEOUT_ms

#define N775_NOTIFICATION_RX_TIMEOUT_ms (2u)

Time in ms to wait for DMA RX notification, after this delay the transaction is considered to have failed

Definition at line 109 of file nxp_mc33775a_cfg.h.

◆ N775_NOTIFICATION_TX_INDEX

#define N775_NOTIFICATION_TX_INDEX (1u)

Index used for FreeRTOS notification sent when TX DMA interrupt comes

Definition at line 83 of file nxp_mc33775a_cfg.h.

◆ N775_NOTIFICATION_TX_TIMEOUT_ms

#define N775_NOTIFICATION_TX_TIMEOUT_ms (1u)

Time in ms to wait for DMA TX notification, after this delay the transaction is considered to have failed

Definition at line 104 of file nxp_mc33775a_cfg.h.

◆ N775_NUMBER_OF_N775_PER_MODULE

#define N775_NUMBER_OF_N775_PER_MODULE (1u)

Number of N775-ICs per battery module

Definition at line 119 of file nxp_mc33775a_cfg.h.

◆ N775_RX_MESSAGE_LENGTH

#define N775_RX_MESSAGE_LENGTH (4u)

775A Rx message length in bytes.

Definition at line 129 of file nxp_mc33775a_cfg.h.

◆ N775_RX_NOTIFIED_VALUE

#define N775_RX_NOTIFIED_VALUE (0x60u)

Notification value sent when RX DMA interrupt comes

Definition at line 99 of file nxp_mc33775a_cfg.h.

◆ N775_TDWAKE_MS

#define N775_TDWAKE_MS (4u)

N775 Time between two consecutive wake-up messages in ms 4ms in data sheet

Definition at line 147 of file nxp_mc33775a_cfg.h.

◆ N775_TIME_AFTER_ENUMERATION_MS

#define N775_TIME_AFTER_ENUMERATION_MS (1u)

N775 time after enumeraiton in ms

Definition at line 162 of file nxp_mc33775a_cfg.h.

◆ N775_TIME_BETWEEN_WAKEUP_MS

#define N775_TIME_BETWEEN_WAKEUP_MS (4u)

N775 time between two wake up commands in ms

Definition at line 157 of file nxp_mc33775a_cfg.h.

◆ N775_TIME_DAISYCHAIN_WAKEUP_MS

#define N775_TIME_DAISYCHAIN_WAKEUP_MS (N775_N_N775 * (N775_TWAKECOM_MS + N775_TDWAKE_MS))

N775 time for daisy-chain to wake-up in ms

Definition at line 152 of file nxp_mc33775a_cfg.h.

◆ N775_TRANSMISSION_TIMEOUT

#define N775_TRANSMISSION_TIMEOUT (10u)

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

Definition at line 135 of file nxp_mc33775a_cfg.h.

◆ N775_TRANSMIT_SPIERRLIMIT

#define N775_TRANSMIT_SPIERRLIMIT (3u)

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

Definition at line 168 of file nxp_mc33775a_cfg.h.

◆ N775_TWAKECOM_MS

#define N775_TWAKECOM_MS (3u)

N775 Maximum time from wakeup event to possible communication in ms 2.4ms in data sheet

Definition at line 141 of file nxp_mc33775a_cfg.h.

◆ N775_TX_MESSAGE_LENGTH

#define N775_TX_MESSAGE_LENGTH (7u)

775A Tx message length in bytes.

Definition at line 124 of file nxp_mc33775a_cfg.h.

◆ N775_TX_NOTIFIED_VALUE

#define N775_TX_NOTIFIED_VALUE (0x50u)

Notification value sent when TX DMA interrupt comes

Definition at line 95 of file nxp_mc33775a_cfg.h.

Function Documentation

◆ N775_ConvertVoltagesToTemperatures()

int16_t N775_ConvertVoltagesToTemperatures ( 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_mV voltage read from the multiplexer in mV

Returns: temperature value in deci °C

Definition at line 188 of file nxp_mc33775a_cfg.c.

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Variable Documentation

◆ n775_muxSequence

N775_MUX_CH_CFG_s n775_muxSequence[N775_MUX_SEQUENCE_LENGTH]

extern

Multiplexer measurement sequence

Default multiplexer measurement sequence Must be adapted to the application

Definition at line 72 of file nxp_mc33775a_cfg.c.

Macros

Functions

Variables