383 lines
22 KiB
C
383 lines
22 KiB
C
/*
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* Copyright (c) 2015-2017 ARM Limited. All rights reserved.
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the License); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an AS IS BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* $Date: 13. Sept 2017
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* $Revision: V1.2
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*
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* Project: CAN (Controller Area Network) Driver definitions
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*/
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/* History:
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* Version 1.2
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* Added ARM_CAN_UNIT_STATE_BUS_OFF unit state and
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* ARM_CAN_EVENT_UNIT_INACTIVE unit event
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* Version 1.1
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* ARM_CAN_STATUS made volatile
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* Version 1.0
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* Initial release
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*/
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#ifndef DRIVER_CAN_H_
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#define DRIVER_CAN_H_
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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#include "Driver_Common.h"
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#define ARM_CAN_API_VERSION ARM_DRIVER_VERSION_MAJOR_MINOR(1,2) /* API version */
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/****** CAN Bitrate selection codes *****/
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typedef enum _ARM_CAN_BITRATE_SELECT {
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ARM_CAN_BITRATE_NOMINAL, ///< Select nominal (flexible data-rate arbitration) bitrate
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ARM_CAN_BITRATE_FD_DATA ///< Select flexible data-rate data bitrate
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} ARM_CAN_BITRATE_SELECT;
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/****** CAN Bit Propagation Segment codes (PROP_SEG) *****/
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#define ARM_CAN_BIT_PROP_SEG_Pos 0UL ///< bits 7..0
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#define ARM_CAN_BIT_PROP_SEG_Msk (0xFFUL << ARM_CAN_BIT_PROP_SEG_Pos)
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#define ARM_CAN_BIT_PROP_SEG(x) (((x) << ARM_CAN_BIT_PROP_SEG_Pos) & ARM_CAN_BIT_PROP_SEG_Msk)
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/****** CAN Bit Phase Buffer Segment 1 (PHASE_SEG1) codes *****/
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#define ARM_CAN_BIT_PHASE_SEG1_Pos 8UL ///< bits 15..8
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#define ARM_CAN_BIT_PHASE_SEG1_Msk (0xFFUL << ARM_CAN_BIT_PHASE_SEG1_Pos)
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#define ARM_CAN_BIT_PHASE_SEG1(x) (((x) << ARM_CAN_BIT_PHASE_SEG1_Pos) & ARM_CAN_BIT_PHASE_SEG1_Msk)
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/****** CAN Bit Phase Buffer Segment 2 (PHASE_SEG2) codes *****/
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#define ARM_CAN_BIT_PHASE_SEG2_Pos 16UL ///< bits 23..16
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#define ARM_CAN_BIT_PHASE_SEG2_Msk (0xFFUL << ARM_CAN_BIT_PHASE_SEG2_Pos)
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#define ARM_CAN_BIT_PHASE_SEG2(x) (((x) << ARM_CAN_BIT_PHASE_SEG2_Pos) & ARM_CAN_BIT_PHASE_SEG2_Msk)
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/****** CAN Bit (Re)Synchronization Jump Width Segment (SJW) *****/
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#define ARM_CAN_BIT_SJW_Pos 24UL ///< bits 28..24
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#define ARM_CAN_BIT_SJW_Msk (0x1FUL << ARM_CAN_BIT_SJW_Pos)
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#define ARM_CAN_BIT_SJW(x) (((x) << ARM_CAN_BIT_SJW_Pos) & ARM_CAN_BIT_SJW_Msk)
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/****** CAN Mode codes *****/
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typedef enum _ARM_CAN_MODE {
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ARM_CAN_MODE_INITIALIZATION, ///< Initialization mode
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ARM_CAN_MODE_NORMAL, ///< Normal operation mode
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ARM_CAN_MODE_RESTRICTED, ///< Restricted operation mode
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ARM_CAN_MODE_MONITOR, ///< Bus monitoring mode
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ARM_CAN_MODE_LOOPBACK_INTERNAL, ///< Loopback internal mode
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ARM_CAN_MODE_LOOPBACK_EXTERNAL ///< Loopback external mode
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} ARM_CAN_MODE;
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/****** CAN Filter Operation codes *****/
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typedef enum _ARM_CAN_FILTER_OPERATION {
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ARM_CAN_FILTER_ID_EXACT_ADD, ///< Add exact id filter
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ARM_CAN_FILTER_ID_EXACT_REMOVE, ///< Remove exact id filter
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ARM_CAN_FILTER_ID_RANGE_ADD, ///< Add range id filter
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ARM_CAN_FILTER_ID_RANGE_REMOVE, ///< Remove range id filter
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ARM_CAN_FILTER_ID_MASKABLE_ADD, ///< Add maskable id filter
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ARM_CAN_FILTER_ID_MASKABLE_REMOVE ///< Remove maskable id filter
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} ARM_CAN_FILTER_OPERATION;
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/****** CAN Object Configuration codes *****/
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typedef enum _ARM_CAN_OBJ_CONFIG {
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ARM_CAN_OBJ_INACTIVE, ///< CAN object inactive
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ARM_CAN_OBJ_TX, ///< CAN transmit object
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ARM_CAN_OBJ_RX, ///< CAN receive object
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ARM_CAN_OBJ_RX_RTR_TX_DATA, ///< CAN object that on RTR reception automatically transmits Data Frame
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ARM_CAN_OBJ_TX_RTR_RX_DATA ///< CAN object that transmits RTR and automatically receives Data Frame
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} ARM_CAN_OBJ_CONFIG;
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/**
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\brief CAN Object Capabilities
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*/
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typedef struct _ARM_CAN_OBJ_CAPABILITIES {
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uint32_t tx : 1; ///< Object supports transmission
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uint32_t rx : 1; ///< Object supports reception
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uint32_t rx_rtr_tx_data : 1; ///< Object supports RTR reception and automatic Data Frame transmission
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uint32_t tx_rtr_rx_data : 1; ///< Object supports RTR transmission and automatic Data Frame reception
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uint32_t multiple_filters : 1; ///< Object allows assignment of multiple filters to it
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uint32_t exact_filtering : 1; ///< Object supports exact identifier filtering
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uint32_t range_filtering : 1; ///< Object supports range identifier filtering
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uint32_t mask_filtering : 1; ///< Object supports mask identifier filtering
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uint32_t message_depth : 8; ///< Number of messages buffers (FIFO) for that object
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uint32_t reserved : 16; ///< Reserved (must be zero)
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} ARM_CAN_OBJ_CAPABILITIES;
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/****** CAN Control Function Operation codes *****/
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#define ARM_CAN_CONTROL_Pos 0UL
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#define ARM_CAN_CONTROL_Msk (0xFFUL << ARM_CAN_CONTROL_Pos)
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#define ARM_CAN_SET_FD_MODE (1UL << ARM_CAN_CONTROL_Pos) ///< Set FD operation mode; arg: 0 = disable, 1 = enable
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#define ARM_CAN_ABORT_MESSAGE_SEND (2UL << ARM_CAN_CONTROL_Pos) ///< Abort sending of CAN message; arg = object
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#define ARM_CAN_CONTROL_RETRANSMISSION (3UL << ARM_CAN_CONTROL_Pos) ///< Enable/disable automatic retransmission; arg: 0 = disable, 1 = enable (default state)
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#define ARM_CAN_SET_TRANSCEIVER_DELAY (4UL << ARM_CAN_CONTROL_Pos) ///< Set transceiver delay; arg = delay in time quanta
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/****** CAN ID Frame Format codes *****/
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#define ARM_CAN_ID_IDE_Pos 31UL
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#define ARM_CAN_ID_IDE_Msk (1UL << ARM_CAN_ID_IDE_Pos)
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/****** CAN Identifier encoding *****/
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#define ARM_CAN_STANDARD_ID(id) (id & 0x000007FFUL) ///< CAN identifier in standard format (11-bits)
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#define ARM_CAN_EXTENDED_ID(id) ((id & 0x1FFFFFFFUL) | ARM_CAN_ID_IDE_Msk)///< CAN identifier in extended format (29-bits)
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/**
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\brief CAN Message Information
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*/
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typedef struct _ARM_CAN_MSG_INFO {
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uint32_t id; ///< CAN identifier with frame format specifier (bit 31)
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uint32_t rtr : 1; ///< Remote transmission request frame
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uint32_t edl : 1; ///< Flexible data-rate format extended data length
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uint32_t brs : 1; ///< Flexible data-rate format with bitrate switch
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uint32_t esi : 1; ///< Flexible data-rate format error state indicator
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uint32_t dlc : 4; ///< Data length code
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uint32_t reserved : 24;
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} ARM_CAN_MSG_INFO;
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/****** CAN specific error code *****/
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#define ARM_CAN_INVALID_BITRATE_SELECT (ARM_DRIVER_ERROR_SPECIFIC - 1) ///< Bitrate selection not supported
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#define ARM_CAN_INVALID_BITRATE (ARM_DRIVER_ERROR_SPECIFIC - 2) ///< Requested bitrate not supported
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#define ARM_CAN_INVALID_BIT_PROP_SEG (ARM_DRIVER_ERROR_SPECIFIC - 3) ///< Propagation segment value not supported
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#define ARM_CAN_INVALID_BIT_PHASE_SEG1 (ARM_DRIVER_ERROR_SPECIFIC - 4) ///< Phase segment 1 value not supported
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#define ARM_CAN_INVALID_BIT_PHASE_SEG2 (ARM_DRIVER_ERROR_SPECIFIC - 5) ///< Phase segment 2 value not supported
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#define ARM_CAN_INVALID_BIT_SJW (ARM_DRIVER_ERROR_SPECIFIC - 6) ///< SJW value not supported
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#define ARM_CAN_NO_MESSAGE_AVAILABLE (ARM_DRIVER_ERROR_SPECIFIC - 7) ///< Message is not available
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/****** CAN Status codes *****/
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#define ARM_CAN_UNIT_STATE_INACTIVE (0U) ///< Unit state: Not active on bus (initialization)
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#define ARM_CAN_UNIT_STATE_ACTIVE (1U) ///< Unit state: Active on bus (can generate active error frame)
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#define ARM_CAN_UNIT_STATE_PASSIVE (2U) ///< Unit state: Error passive (can not generate active error frame)
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#define ARM_CAN_UNIT_STATE_BUS_OFF (3U) ///< Unit state: Bus-off (can recover to active state)
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#define ARM_CAN_LEC_NO_ERROR (0U) ///< Last error code: No error
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#define ARM_CAN_LEC_BIT_ERROR (1U) ///< Last error code: Bit error
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#define ARM_CAN_LEC_STUFF_ERROR (2U) ///< Last error code: Bit stuffing error
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#define ARM_CAN_LEC_CRC_ERROR (3U) ///< Last error code: CRC error
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#define ARM_CAN_LEC_FORM_ERROR (4U) ///< Last error code: Illegal fixed-form bit
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#define ARM_CAN_LEC_ACK_ERROR (5U) ///< Last error code: Acknowledgment error
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/**
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\brief CAN Status
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*/
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typedef volatile struct _ARM_CAN_STATUS {
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uint32_t unit_state : 4; ///< Unit bus state
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uint32_t last_error_code : 4; ///< Last error code
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uint32_t tx_error_count : 8; ///< Transmitter error count
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uint32_t rx_error_count : 8; ///< Receiver error count
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uint32_t reserved : 8;
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} ARM_CAN_STATUS;
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/****** CAN Unit Event *****/
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#define ARM_CAN_EVENT_UNIT_INACTIVE (0U) ///< Unit entered Inactive state
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#define ARM_CAN_EVENT_UNIT_ACTIVE (1U) ///< Unit entered Error Active state
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#define ARM_CAN_EVENT_UNIT_WARNING (2U) ///< Unit entered Error Warning state (one or both error counters >= 96)
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#define ARM_CAN_EVENT_UNIT_PASSIVE (3U) ///< Unit entered Error Passive state
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#define ARM_CAN_EVENT_UNIT_BUS_OFF (4U) ///< Unit entered Bus-off state
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/****** CAN Send/Receive Event *****/
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#define ARM_CAN_EVENT_SEND_COMPLETE (1UL << 0) ///< Send complete
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#define ARM_CAN_EVENT_RECEIVE (1UL << 1) ///< Message received
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#define ARM_CAN_EVENT_RECEIVE_OVERRUN (1UL << 2) ///< Received message overrun
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// Function documentation
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/**
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\fn ARM_DRIVER_VERSION ARM_CAN_GetVersion (void)
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\brief Get driver version.
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\return \ref ARM_DRIVER_VERSION
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\fn ARM_CAN_CAPABILITIES ARM_CAN_GetCapabilities (void)
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\brief Get driver capabilities.
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\return \ref ARM_CAN_CAPABILITIES
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\fn int32_t ARM_CAN_Initialize (ARM_CAN_SignalUnitEvent_t cb_unit_event,
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ARM_CAN_SignalObjectEvent_t cb_object_event)
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\brief Initialize CAN interface and register signal (callback) functions.
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\param[in] cb_unit_event Pointer to \ref ARM_CAN_SignalUnitEvent callback function
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\param[in] cb_object_event Pointer to \ref ARM_CAN_SignalObjectEvent callback function
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\return \ref execution_status
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\fn int32_t ARM_CAN_Uninitialize (void)
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\brief De-initialize CAN interface.
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\return \ref execution_status
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\fn int32_t ARM_CAN_PowerControl (ARM_POWER_STATE state)
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\brief Control CAN interface power.
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\param[in] state Power state
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- \ref ARM_POWER_OFF : power off: no operation possible
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- \ref ARM_POWER_LOW : low power mode: retain state, detect and signal wake-up events
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- \ref ARM_POWER_FULL : power on: full operation at maximum performance
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\return \ref execution_status
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\fn uint32_t ARM_CAN_GetClock (void)
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\brief Retrieve CAN base clock frequency.
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\return base clock frequency
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\fn int32_t ARM_CAN_SetBitrate (ARM_CAN_BITRATE_SELECT select, uint32_t bitrate, uint32_t bit_segments)
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\brief Set bitrate for CAN interface.
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\param[in] select Bitrate selection
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- \ref ARM_CAN_BITRATE_NOMINAL : nominal (flexible data-rate arbitration) bitrate
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- \ref ARM_CAN_BITRATE_FD_DATA : flexible data-rate data bitrate
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\param[in] bitrate Bitrate
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\param[in] bit_segments Bit segments settings
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- \ref ARM_CAN_BIT_PROP_SEG(x) : number of time quanta for propagation time segment
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- \ref ARM_CAN_BIT_PHASE_SEG1(x) : number of time quanta for phase buffer segment 1
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- \ref ARM_CAN_BIT_PHASE_SEG2(x) : number of time quanta for phase buffer Segment 2
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- \ref ARM_CAN_BIT_SJW(x) : number of time quanta for (re-)synchronization jump width
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\return \ref execution_status
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\fn int32_t ARM_CAN_SetMode (ARM_CAN_MODE mode)
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\brief Set operating mode for CAN interface.
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\param[in] mode Operating mode
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- \ref ARM_CAN_MODE_INITIALIZATION : initialization mode
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- \ref ARM_CAN_MODE_NORMAL : normal operation mode
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- \ref ARM_CAN_MODE_RESTRICTED : restricted operation mode
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- \ref ARM_CAN_MODE_MONITOR : bus monitoring mode
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- \ref ARM_CAN_MODE_LOOPBACK_INTERNAL : loopback internal mode
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- \ref ARM_CAN_MODE_LOOPBACK_EXTERNAL : loopback external mode
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\return \ref execution_status
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\fn ARM_CAN_OBJ_CAPABILITIES ARM_CAN_ObjectGetCapabilities (uint32_t obj_idx)
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\brief Retrieve capabilities of an object.
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\param[in] obj_idx Object index
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\return \ref ARM_CAN_OBJ_CAPABILITIES
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\fn int32_t ARM_CAN_ObjectSetFilter (uint32_t obj_idx, ARM_CAN_FILTER_OPERATION operation, uint32_t id, uint32_t arg)
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\brief Add or remove filter for message reception.
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\param[in] obj_idx Object index of object that filter should be or is assigned to
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\param[in] operation Operation on filter
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- \ref ARM_CAN_FILTER_ID_EXACT_ADD : add exact id filter
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- \ref ARM_CAN_FILTER_ID_EXACT_REMOVE : remove exact id filter
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- \ref ARM_CAN_FILTER_ID_RANGE_ADD : add range id filter
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- \ref ARM_CAN_FILTER_ID_RANGE_REMOVE : remove range id filter
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- \ref ARM_CAN_FILTER_ID_MASKABLE_ADD : add maskable id filter
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- \ref ARM_CAN_FILTER_ID_MASKABLE_REMOVE : remove maskable id filter
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\param[in] id ID or start of ID range (depending on filter type)
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\param[in] arg Mask or end of ID range (depending on filter type)
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\return \ref execution_status
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\fn int32_t ARM_CAN_ObjectConfigure (uint32_t obj_idx, ARM_CAN_OBJ_CONFIG obj_cfg)
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\brief Configure object.
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\param[in] obj_idx Object index
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\param[in] obj_cfg Object configuration state
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- \ref ARM_CAN_OBJ_INACTIVE : deactivate object
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- \ref ARM_CAN_OBJ_RX : configure object for reception
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- \ref ARM_CAN_OBJ_TX : configure object for transmission
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- \ref ARM_CAN_OBJ_RX_RTR_TX_DATA : configure object that on RTR reception automatically transmits Data Frame
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- \ref ARM_CAN_OBJ_TX_RTR_RX_DATA : configure object that transmits RTR and automatically receives Data Frame
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\return \ref execution_status
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\fn int32_t ARM_CAN_MessageSend (uint32_t obj_idx, ARM_CAN_MSG_INFO *msg_info, const uint8_t *data, uint8_t size)
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\brief Send message on CAN bus.
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\param[in] obj_idx Object index
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\param[in] msg_info Pointer to CAN message information
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\param[in] data Pointer to data buffer
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\param[in] size Number of data bytes to send
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\return value >= 0 number of data bytes accepted to send
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\return value < 0 \ref execution_status
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\fn int32_t ARM_CAN_MessageRead (uint32_t obj_idx, ARM_CAN_MSG_INFO *msg_info, uint8_t *data, uint8_t size)
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\brief Read message received on CAN bus.
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\param[in] obj_idx Object index
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\param[out] msg_info Pointer to read CAN message information
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\param[out] data Pointer to data buffer for read data
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\param[in] size Maximum number of data bytes to read
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\return value >= 0 number of data bytes read
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\return value < 0 \ref execution_status
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\fn int32_t ARM_CAN_Control (uint32_t control, uint32_t arg)
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\brief Control CAN interface.
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\param[in] control Operation
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- \ref ARM_CAN_SET_FD_MODE : set FD operation mode
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- \ref ARM_CAN_ABORT_MESSAGE_SEND : abort sending of CAN message
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- \ref ARM_CAN_CONTROL_RETRANSMISSION : enable/disable automatic retransmission
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- \ref ARM_CAN_SET_TRANSCEIVER_DELAY : set transceiver delay
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\param[in] arg Argument of operation
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\return \ref execution_status
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\fn ARM_CAN_STATUS ARM_CAN_GetStatus (void)
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\brief Get CAN status.
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\return CAN status \ref ARM_CAN_STATUS
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\fn void ARM_CAN_SignalUnitEvent (uint32_t event)
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\brief Signal CAN unit event.
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\param[in] event \ref CAN_unit_events
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\return none
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\fn void ARM_CAN_SignalObjectEvent (uint32_t obj_idx, uint32_t event)
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\brief Signal CAN object event.
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\param[in] obj_idx Object index
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\param[in] event \ref CAN_events
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\return none
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*/
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typedef void (*ARM_CAN_SignalUnitEvent_t) (uint32_t event); ///< Pointer to \ref ARM_CAN_SignalUnitEvent : Signal CAN Unit Event.
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typedef void (*ARM_CAN_SignalObjectEvent_t) (uint32_t obj_idx, uint32_t event); ///< Pointer to \ref ARM_CAN_SignalObjectEvent : Signal CAN Object Event.
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/**
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\brief CAN Device Driver Capabilities.
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*/
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typedef struct _ARM_CAN_CAPABILITIES {
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uint32_t num_objects : 8; ///< Number of \ref can_objects available
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uint32_t reentrant_operation : 1; ///< Support for reentrant calls to \ref ARM_CAN_MessageSend, \ref ARM_CAN_MessageRead, \ref ARM_CAN_ObjectConfigure and abort message sending used by \ref ARM_CAN_Control
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uint32_t fd_mode : 1; ///< Support for CAN with flexible data-rate mode (CAN_FD) (set by \ref ARM_CAN_Control)
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uint32_t restricted_mode : 1; ///< Support for restricted operation mode (set by \ref ARM_CAN_SetMode)
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uint32_t monitor_mode : 1; ///< Support for bus monitoring mode (set by \ref ARM_CAN_SetMode)
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uint32_t internal_loopback : 1; ///< Support for internal loopback mode (set by \ref ARM_CAN_SetMode)
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uint32_t external_loopback : 1; ///< Support for external loopback mode (set by \ref ARM_CAN_SetMode)
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uint32_t reserved : 18; ///< Reserved (must be zero)
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} ARM_CAN_CAPABILITIES;
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/**
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\brief Access structure of the CAN Driver.
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*/
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typedef struct _ARM_DRIVER_CAN {
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ARM_DRIVER_VERSION (*GetVersion) (void); ///< Pointer to \ref ARM_CAN_GetVersion : Get driver version.
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ARM_CAN_CAPABILITIES (*GetCapabilities) (void); ///< Pointer to \ref ARM_CAN_GetCapabilities : Get driver capabilities.
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int32_t (*Initialize) (ARM_CAN_SignalUnitEvent_t cb_unit_event,
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ARM_CAN_SignalObjectEvent_t cb_object_event); ///< Pointer to \ref ARM_CAN_Initialize : Initialize CAN interface.
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int32_t (*Uninitialize) (void); ///< Pointer to \ref ARM_CAN_Uninitialize : De-initialize CAN interface.
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int32_t (*PowerControl) (ARM_POWER_STATE state); ///< Pointer to \ref ARM_CAN_PowerControl : Control CAN interface power.
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uint32_t (*GetClock) (void); ///< Pointer to \ref ARM_CAN_GetClock : Retrieve CAN base clock frequency.
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int32_t (*SetBitrate) (ARM_CAN_BITRATE_SELECT select,
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uint32_t bitrate,
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uint32_t bit_segments); ///< Pointer to \ref ARM_CAN_SetBitrate : Set bitrate for CAN interface.
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int32_t (*SetMode) (ARM_CAN_MODE mode); ///< Pointer to \ref ARM_CAN_SetMode : Set operating mode for CAN interface.
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ARM_CAN_OBJ_CAPABILITIES (*ObjectGetCapabilities) (uint32_t obj_idx); ///< Pointer to \ref ARM_CAN_ObjectGetCapabilities : Retrieve capabilities of an object.
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int32_t (*ObjectSetFilter) (uint32_t obj_idx,
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ARM_CAN_FILTER_OPERATION operation,
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uint32_t id,
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uint32_t arg); ///< Pointer to \ref ARM_CAN_ObjectSetFilter : Add or remove filter for message reception.
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int32_t (*ObjectConfigure) (uint32_t obj_idx,
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ARM_CAN_OBJ_CONFIG obj_cfg); ///< Pointer to \ref ARM_CAN_ObjectConfigure : Configure object.
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int32_t (*MessageSend) (uint32_t obj_idx,
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ARM_CAN_MSG_INFO *msg_info,
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const uint8_t *data,
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uint8_t size); ///< Pointer to \ref ARM_CAN_MessageSend : Send message on CAN bus.
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int32_t (*MessageRead) (uint32_t obj_idx,
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ARM_CAN_MSG_INFO *msg_info,
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uint8_t *data,
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uint8_t size); ///< Pointer to \ref ARM_CAN_MessageRead : Read message received on CAN bus.
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int32_t (*Control) (uint32_t control,
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uint32_t arg); ///< Pointer to \ref ARM_CAN_Control : Control CAN interface.
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ARM_CAN_STATUS (*GetStatus) (void); ///< Pointer to \ref ARM_CAN_GetStatus : Get CAN status.
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} const ARM_DRIVER_CAN;
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#ifdef __cplusplus
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}
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#endif
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#endif /* DRIVER_CAN_H_ */
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