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