2 * Copyright (c) 2015-2016 ARM Limited. All rights reserved.
4 * SPDX-License-Identifier: Apache-2.0
6 * Licensed under the Apache License, Version 2.0 (the License); you may
7 * not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
10 * www.apache.org/licenses/LICENSE-2.0
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an AS IS BASIS, WITHOUT
14 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
18 * $Date: 7. December 2015
21 * Project: CAN (Controller Area Network) Driver definitions
37 #include "Driver_Common.h"
39 #define ARM_CAN_API_VERSION ARM_DRIVER_VERSION_MAJOR_MINOR(1,0)/* API version */
42 /****** CAN Bitrate selection codes *****/
43 typedef enum _ARM_CAN_BITRATE_SELECT {
44 ARM_CAN_BITRATE_NOMINAL, ///< Select nominal (flexible data-rate arbitration) bitrate
45 ARM_CAN_BITRATE_FD_DATA ///< Select flexible data-rate data bitrate
46 } ARM_CAN_BITRATE_SELECT;
48 /****** CAN Bit Propagation Segment codes (PROP_SEG) *****/
49 #define ARM_CAN_BIT_PROP_SEG_Pos 0UL ///< bits 7..0
50 #define ARM_CAN_BIT_PROP_SEG_Msk (0xFFUL << ARM_CAN_BIT_PROP_SEG_Pos)
51 #define ARM_CAN_BIT_PROP_SEG(x) (((x) << ARM_CAN_BIT_PROP_SEG_Pos) & ARM_CAN_BIT_PROP_SEG_Msk)
53 /****** CAN Bit Phase Buffer Segment 1 (PHASE_SEG1) codes *****/
54 #define ARM_CAN_BIT_PHASE_SEG1_Pos 8UL ///< bits 15..8
55 #define ARM_CAN_BIT_PHASE_SEG1_Msk (0xFFUL << ARM_CAN_BIT_PHASE_SEG1_Pos)
56 #define ARM_CAN_BIT_PHASE_SEG1(x) (((x) << ARM_CAN_BIT_PHASE_SEG1_Pos) & ARM_CAN_BIT_PHASE_SEG1_Msk)
58 /****** CAN Bit Phase Buffer Segment 2 (PHASE_SEG2) codes *****/
59 #define ARM_CAN_BIT_PHASE_SEG2_Pos 16UL ///< bits 23..16
60 #define ARM_CAN_BIT_PHASE_SEG2_Msk (0xFFUL << ARM_CAN_BIT_PHASE_SEG2_Pos)
61 #define ARM_CAN_BIT_PHASE_SEG2(x) (((x) << ARM_CAN_BIT_PHASE_SEG2_Pos) & ARM_CAN_BIT_PHASE_SEG2_Msk)
63 /****** CAN Bit (Re)Synchronization Jump Width Segment (SJW) *****/
64 #define ARM_CAN_BIT_SJW_Pos 24UL ///< bits 28..24
65 #define ARM_CAN_BIT_SJW_Msk (0x1FUL << ARM_CAN_BIT_SJW_Pos)
66 #define ARM_CAN_BIT_SJW(x) (((x) << ARM_CAN_BIT_SJW_Pos) & ARM_CAN_BIT_SJW_Msk)
68 /****** CAN Mode codes *****/
69 typedef enum _ARM_CAN_MODE {
70 ARM_CAN_MODE_INITIALIZATION, ///< Initialization mode
71 ARM_CAN_MODE_NORMAL, ///< Normal operation mode
72 ARM_CAN_MODE_RESTRICTED, ///< Restricted operation mode
73 ARM_CAN_MODE_MONITOR, ///< Bus monitoring mode
74 ARM_CAN_MODE_LOOPBACK_INTERNAL, ///< Loopback internal mode
75 ARM_CAN_MODE_LOOPBACK_EXTERNAL ///< Loopback external mode
78 /****** CAN Filter Operation codes *****/
79 typedef enum _ARM_CAN_FILTER_OPERATION {
80 ARM_CAN_FILTER_ID_EXACT_ADD, ///< Add exact id filter
81 ARM_CAN_FILTER_ID_EXACT_REMOVE, ///< Remove exact id filter
82 ARM_CAN_FILTER_ID_RANGE_ADD, ///< Add range id filter
83 ARM_CAN_FILTER_ID_RANGE_REMOVE, ///< Remove range id filter
84 ARM_CAN_FILTER_ID_MASKABLE_ADD, ///< Add maskable id filter
85 ARM_CAN_FILTER_ID_MASKABLE_REMOVE ///< Remove maskable id filter
86 } ARM_CAN_FILTER_OPERATION;
88 /****** CAN Object Configuration codes *****/
89 typedef enum _ARM_CAN_OBJ_CONFIG {
90 ARM_CAN_OBJ_INACTIVE, ///< CAN object inactive
91 ARM_CAN_OBJ_TX, ///< CAN transmit object
92 ARM_CAN_OBJ_RX, ///< CAN receive object
93 ARM_CAN_OBJ_RX_RTR_TX_DATA, ///< CAN object that on RTR reception automatically transmits Data Frame
94 ARM_CAN_OBJ_TX_RTR_RX_DATA ///< CAN object that transmits RTR and automatically receives Data Frame
98 \brief CAN Object Capabilities
100 typedef struct _ARM_CAN_OBJ_CAPABILITIES {
101 uint32_t tx : 1; ///< Object supports transmission
102 uint32_t rx : 1; ///< Object supports reception
103 uint32_t rx_rtr_tx_data : 1; ///< Object supports RTR reception and automatic Data Frame transmission
104 uint32_t tx_rtr_rx_data : 1; ///< Object supports RTR transmission and automatic Data Frame reception
105 uint32_t multiple_filters : 1; ///< Object allows assignment of multiple filters to it
106 uint32_t exact_filtering : 1; ///< Object supports exact identifier filtering
107 uint32_t range_filtering : 1; ///< Object supports range identifier filtering
108 uint32_t mask_filtering : 1; ///< Object supports mask identifier filtering
109 uint32_t message_depth : 8; ///< Number of messages buffers (FIFO) for that object
110 } ARM_CAN_OBJ_CAPABILITIES;
112 /****** CAN Control Function Operation codes *****/
113 #define ARM_CAN_CONTROL_Pos 0UL
114 #define ARM_CAN_CONTROL_Msk (0xFFUL << ARM_CAN_CONTROL_Pos)
115 #define ARM_CAN_SET_FD_MODE (1UL << ARM_CAN_CONTROL_Pos) ///< Set FD operation mode; arg: 0 = disable, 1 = enable
116 #define ARM_CAN_ABORT_MESSAGE_SEND (2UL << ARM_CAN_CONTROL_Pos) ///< Abort sending of CAN message; arg = object
117 #define ARM_CAN_CONTROL_RETRANSMISSION (3UL << ARM_CAN_CONTROL_Pos) ///< Enable/disable automatic retransmission; arg: 0 = disable, 1 = enable (default state)
118 #define ARM_CAN_SET_TRANSCEIVER_DELAY (4UL << ARM_CAN_CONTROL_Pos) ///< Set transceiver delay; arg = delay in time quanta
120 /****** CAN ID Frame Format codes *****/
121 #define ARM_CAN_ID_IDE_Pos 31UL
122 #define ARM_CAN_ID_IDE_Msk (1UL << ARM_CAN_ID_IDE_Pos)
124 /****** CAN Identifier encoding *****/
125 #define ARM_CAN_STANDARD_ID(id) (id & 0x000007FFUL) ///< CAN identifier in standard format (11-bits)
126 #define ARM_CAN_EXTENDED_ID(id) ((id & 0x1FFFFFFFUL) | ARM_CAN_ID_IDE_Msk)///< CAN identifier in extended format (29-bits)
129 \brief CAN Message Information
131 typedef struct _ARM_CAN_MSG_INFO {
132 uint32_t id; ///< CAN identifier with frame format specifier (bit 31)
133 uint32_t rtr : 1; ///< Remote transmission request frame
134 uint32_t edl : 1; ///< Flexible data-rate format extended data length
135 uint32_t brs : 1; ///< Flexible data-rate format with bitrate switch
136 uint32_t esi : 1; ///< Flexible data-rate format error state indicator
137 uint32_t dlc : 4; ///< Data length code
140 /****** CAN specific error code *****/
141 #define ARM_CAN_INVALID_BITRATE_SELECT (ARM_DRIVER_ERROR_SPECIFIC - 1) ///< Bitrate selection not supported
142 #define ARM_CAN_INVALID_BITRATE (ARM_DRIVER_ERROR_SPECIFIC - 2) ///< Requested bitrate not supported
143 #define ARM_CAN_INVALID_BIT_PROP_SEG (ARM_DRIVER_ERROR_SPECIFIC - 3) ///< Propagation segment value not supported
144 #define ARM_CAN_INVALID_BIT_PHASE_SEG1 (ARM_DRIVER_ERROR_SPECIFIC - 4) ///< Phase segment 1 value not supported
145 #define ARM_CAN_INVALID_BIT_PHASE_SEG2 (ARM_DRIVER_ERROR_SPECIFIC - 5) ///< Phase segment 2 value not supported
146 #define ARM_CAN_INVALID_BIT_SJW (ARM_DRIVER_ERROR_SPECIFIC - 6) ///< SJW value not supported
147 #define ARM_CAN_NO_MESSAGE_AVAILABLE (ARM_DRIVER_ERROR_SPECIFIC - 7) ///< Message is not available
149 /****** CAN Status codes *****/
150 #define ARM_CAN_UNIT_STATE_INACTIVE (0U) ///< Unit state: Not active on bus (initialize or error bus off)
151 #define ARM_CAN_UNIT_STATE_ACTIVE (1U) ///< Unit state: Active on bus (can generate active error frame)
152 #define ARM_CAN_UNIT_STATE_PASSIVE (2U) ///< Unit state: Error passive (can not generate active error frame)
153 #define ARM_CAN_LEC_NO_ERROR (0U) ///< Last error code: No error
154 #define ARM_CAN_LEC_BIT_ERROR (1U) ///< Last error code: Bit error
155 #define ARM_CAN_LEC_STUFF_ERROR (2U) ///< Last error code: Bit stuffing error
156 #define ARM_CAN_LEC_CRC_ERROR (3U) ///< Last error code: CRC error
157 #define ARM_CAN_LEC_FORM_ERROR (4U) ///< Last error code: Illegal fixed-form bit
158 #define ARM_CAN_LEC_ACK_ERROR (5U) ///< Last error code: Acknowledgement error
163 typedef struct _ARM_CAN_STATUS {
164 uint32_t unit_state : 4; ///< Unit bus state
165 uint32_t last_error_code : 4; ///< Last error code
166 uint32_t tx_error_count : 8; ///< Transmitter error count
167 uint32_t rx_error_count : 8; ///< Receiver error count
171 /****** CAN Unit Event *****/
172 #define ARM_CAN_EVENT_UNIT_ACTIVE (1U) ///< Unit entered Error Active state
173 #define ARM_CAN_EVENT_UNIT_WARNING (2U) ///< Unit entered Error Warning state (one or both error counters >= 96)
174 #define ARM_CAN_EVENT_UNIT_PASSIVE (3U) ///< Unit entered Error Passive state
175 #define ARM_CAN_EVENT_UNIT_BUS_OFF (4U) ///< Unit entered bus off state
177 /****** CAN Send/Receive Event *****/
178 #define ARM_CAN_EVENT_SEND_COMPLETE (1UL << 0) ///< Send complete
179 #define ARM_CAN_EVENT_RECEIVE (1UL << 1) ///< Message received
180 #define ARM_CAN_EVENT_RECEIVE_OVERRUN (1UL << 2) ///< Received message overrun
183 // Function documentation
185 \fn ARM_DRIVER_VERSION ARM_CAN_GetVersion (void)
186 \brief Get driver version.
187 \return \ref ARM_DRIVER_VERSION
189 \fn ARM_CAN_CAPABILITIES ARM_CAN_GetCapabilities (void)
190 \brief Get driver capabilities.
191 \return \ref ARM_CAN_CAPABILITIES
193 \fn int32_t ARM_CAN_Initialize (ARM_CAN_SignalUnitEvent_t cb_unit_event,
194 ARM_CAN_SignalObjectEvent_t cb_object_event)
195 \brief Initialize CAN interface and register signal (callback) functions.
196 \param[in] cb_unit_event Pointer to \ref ARM_CAN_SignalUnitEvent callback function
197 \param[in] cb_object_event Pointer to \ref ARM_CAN_SignalObjectEvent callback function
198 \return \ref execution_status
200 \fn int32_t ARM_CAN_Uninitialize (void)
201 \brief De-initialize CAN interface.
202 \return \ref execution_status
204 \fn int32_t ARM_CAN_PowerControl (ARM_POWER_STATE state)
205 \brief Control CAN interface power.
206 \param[in] state Power state
207 - \ref ARM_POWER_OFF : power off: no operation possible
208 - \ref ARM_POWER_LOW : low power mode: retain state, detect and signal wake-up events
209 - \ref ARM_POWER_FULL : power on: full operation at maximum performance
210 \return \ref execution_status
212 \fn uint32_t ARM_CAN_GetClock (void)
213 \brief Retrieve CAN base clock frequency.
214 \return base clock frequency
216 \fn int32_t ARM_CAN_SetBitrate (ARM_CAN_BITRATE_SELECT select, uint32_t bitrate, uint32_t bit_segments)
217 \brief Set bitrate for CAN interface.
218 \param[in] select Bitrate selection
219 - \ref ARM_CAN_BITRATE_NOMINAL : nominal (flexible data-rate arbitration) bitrate
220 - \ref ARM_CAN_BITRATE_FD_DATA : flexible data-rate data bitrate
221 \param[in] bitrate Bitrate
222 \param[in] bit_segments Bit segments settings
223 - \ref ARM_CAN_BIT_PROP_SEG(x) : number of time quanta for propagation time segment
224 - \ref ARM_CAN_BIT_PHASE_SEG1(x) : number of time quanta for phase buffer segment 1
225 - \ref ARM_CAN_BIT_PHASE_SEG2(x) : number of time quanta for phase buffer Segment 2
226 - \ref ARM_CAN_BIT_SJW(x) : number of time quanta for (re-)synchronization jump width
227 \return \ref execution_status
229 \fn int32_t ARM_CAN_SetMode (ARM_CAN_MODE mode)
230 \brief Set operating mode for CAN interface.
231 \param[in] mode Operating mode
232 - \ref ARM_CAN_MODE_INITIALIZATION : initialization mode
233 - \ref ARM_CAN_MODE_NORMAL : normal operation mode
234 - \ref ARM_CAN_MODE_RESTRICTED : restricted operation mode
235 - \ref ARM_CAN_MODE_MONITOR : bus monitoring mode
236 - \ref ARM_CAN_MODE_LOOPBACK_INTERNAL : loopback internal mode
237 - \ref ARM_CAN_MODE_LOOPBACK_EXTERNAL : loopback external mode
238 \return \ref execution_status
240 \fn ARM_CAN_OBJ_CAPABILITIES ARM_CAN_ObjectGetCapabilities (uint32_t obj_idx)
241 \brief Retrieve capabilities of an object.
242 \param[in] obj_idx Object index
243 \return \ref ARM_CAN_OBJ_CAPABILITIES
245 \fn int32_t ARM_CAN_ObjectSetFilter (uint32_t obj_idx, ARM_CAN_FILTER_OPERATION operation, uint32_t id, uint32_t arg)
246 \brief Add or remove filter for message reception.
247 \param[in] obj_idx Object index of object that filter should be or is assigned to
248 \param[in] operation Operation on filter
249 - \ref ARM_CAN_FILTER_ID_EXACT_ADD : add exact id filter
250 - \ref ARM_CAN_FILTER_ID_EXACT_REMOVE : remove exact id filter
251 - \ref ARM_CAN_FILTER_ID_RANGE_ADD : add range id filter
252 - \ref ARM_CAN_FILTER_ID_RANGE_REMOVE : remove range id filter
253 - \ref ARM_CAN_FILTER_ID_MASKABLE_ADD : add maskable id filter
254 - \ref ARM_CAN_FILTER_ID_MASKABLE_REMOVE : remove maskable id filter
255 \param[in] id ID or start of ID range (depending on filter type)
256 \param[in] arg Mask or end of ID range (depending on filter type)
257 \return \ref execution_status
259 \fn int32_t ARM_CAN_ObjectConfigure (uint32_t obj_idx, ARM_CAN_OBJ_CONFIG obj_cfg)
260 \brief Configure object.
261 \param[in] obj_idx Object index
262 \param[in] obj_cfg Object configuration state
263 - \ref ARM_CAN_OBJ_INACTIVE : deactivate object
264 - \ref ARM_CAN_OBJ_RX : configure object for reception
265 - \ref ARM_CAN_OBJ_TX : configure object for transmission
266 - \ref ARM_CAN_OBJ_RX_RTR_TX_DATA : configure object that on RTR reception automatically transmits Data Frame
267 - \ref ARM_CAN_OBJ_TX_RTR_RX_DATA : configure object that transmits RTR and automatically receives Data Frame
268 \return \ref execution_status
270 \fn int32_t ARM_CAN_MessageSend (uint32_t obj_idx, ARM_CAN_MSG_INFO *msg_info, const uint8_t *data, uint8_t size)
271 \brief Send message on CAN bus.
272 \param[in] obj_idx Object index
273 \param[in] msg_info Pointer to CAN message information
274 \param[in] data Pointer to data buffer
275 \param[in] size Number of data bytes to send
276 \return value >= 0 number of data bytes accepted to send
277 \return value < 0 \ref execution_status
279 \fn int32_t ARM_CAN_MessageRead (uint32_t obj_idx, ARM_CAN_MSG_INFO *msg_info, uint8_t *data, uint8_t size)
280 \brief Read message received on CAN bus.
281 \param[in] obj_idx Object index
282 \param[out] msg_info Pointer to read CAN message information
283 \param[out] data Pointer to data buffer for read data
284 \param[in] size Maximum number of data bytes to read
285 \return value >= 0 number of data bytes read
286 \return value < 0 \ref execution_status
288 \fn int32_t ARM_CAN_Control (uint32_t control, uint32_t arg)
289 \brief Control CAN interface.
290 \param[in] control Operation
291 - \ref ARM_CAN_SET_FD_MODE : set FD operation mode
292 - \ref ARM_CAN_ABORT_MESSAGE_SEND : abort sending of CAN message
293 - \ref ARM_CAN_CONTROL_RETRANSMISSION : enable/disable automatic retransmission
294 - \ref ARM_CAN_SET_TRANSCEIVER_DELAY : set transceiver delay
295 \param[in] arg Argument of operation
296 \return \ref execution_status
298 \fn ARM_CAN_STATUS ARM_CAN_GetStatus (void)
299 \brief Get CAN status.
300 \return CAN status \ref ARM_CAN_STATUS
302 \fn void ARM_CAN_SignalUnitEvent (uint32_t event)
303 \brief Signal CAN unit event.
304 \param[in] event \ref CAN_unit_events
307 \fn void ARM_CAN_SignalObjectEvent (uint32_t obj_idx, uint32_t event)
308 \brief Signal CAN object event.
309 \param[in] obj_idx Object index
310 \param[in] event \ref CAN_events
314 typedef void (*ARM_CAN_SignalUnitEvent_t) (uint32_t event); ///< Pointer to \ref ARM_CAN_SignalUnitEvent : Signal CAN Unit Event.
315 typedef void (*ARM_CAN_SignalObjectEvent_t) (uint32_t obj_idx, uint32_t event); ///< Pointer to \ref ARM_CAN_SignalObjectEvent : Signal CAN Object Event.
319 \brief CAN Device Driver Capabilities.
321 typedef struct _ARM_CAN_CAPABILITIES {
322 uint32_t num_objects : 8; ///< Number of \ref can_objects available
323 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
324 uint32_t fd_mode : 1; ///< Support for CAN with flexible data-rate mode (CAN_FD) (set by \ref ARM_CAN_Control)
325 uint32_t restricted_mode : 1; ///< Support for restricted operation mode (set by \ref ARM_CAN_SetMode)
326 uint32_t monitor_mode : 1; ///< Support for bus monitoring mode (set by \ref ARM_CAN_SetMode)
327 uint32_t internal_loopback : 1; ///< Support for internal loopback mode (set by \ref ARM_CAN_SetMode)
328 uint32_t external_loopback : 1; ///< Support for external loopback mode (set by \ref ARM_CAN_SetMode)
329 } ARM_CAN_CAPABILITIES;
333 \brief Access structure of the CAN Driver.
335 typedef struct _ARM_DRIVER_CAN {
336 ARM_DRIVER_VERSION (*GetVersion) (void); ///< Pointer to \ref ARM_CAN_GetVersion : Get driver version.
337 ARM_CAN_CAPABILITIES (*GetCapabilities) (void); ///< Pointer to \ref ARM_CAN_GetCapabilities : Get driver capabilities.
338 int32_t (*Initialize) (ARM_CAN_SignalUnitEvent_t cb_unit_event,
339 ARM_CAN_SignalObjectEvent_t cb_object_event); ///< Pointer to \ref ARM_CAN_Initialize : Initialize CAN interface.
340 int32_t (*Uninitialize) (void); ///< Pointer to \ref ARM_CAN_Uninitialize : De-initialize CAN interface.
341 int32_t (*PowerControl) (ARM_POWER_STATE state); ///< Pointer to \ref ARM_CAN_PowerControl : Control CAN interface power.
342 uint32_t (*GetClock) (void); ///< Pointer to \ref ARM_CAN_GetClock : Retrieve CAN base clock frequency.
343 int32_t (*SetBitrate) (ARM_CAN_BITRATE_SELECT select,
345 uint32_t bit_segments); ///< Pointer to \ref ARM_CAN_SetBitrate : Set bitrate for CAN interface.
346 int32_t (*SetMode) (ARM_CAN_MODE mode); ///< Pointer to \ref ARM_CAN_SetMode : Set operating mode for CAN interface.
347 ARM_CAN_OBJ_CAPABILITIES (*ObjectGetCapabilities) (uint32_t obj_idx); ///< Pointer to \ref ARM_CAN_ObjectGetCapabilities : Retrieve capabilities of an object.
348 int32_t (*ObjectSetFilter) (uint32_t obj_idx,
349 ARM_CAN_FILTER_OPERATION operation,
351 uint32_t arg); ///< Pointer to \ref ARM_CAN_ObjectSetFilter : Add or remove filter for message reception.
352 int32_t (*ObjectConfigure) (uint32_t obj_idx,
353 ARM_CAN_OBJ_CONFIG obj_cfg); ///< Pointer to \ref ARM_CAN_ObjectConfigure : Configure object.
354 int32_t (*MessageSend) (uint32_t obj_idx,
355 ARM_CAN_MSG_INFO *msg_info,
357 uint8_t size); ///< Pointer to \ref ARM_CAN_MessageSend : Send message on CAN bus.
358 int32_t (*MessageRead) (uint32_t obj_idx,
359 ARM_CAN_MSG_INFO *msg_info,
361 uint8_t size); ///< Pointer to \ref ARM_CAN_MessageRead : Read message received on CAN bus.
362 int32_t (*Control) (uint32_t control,
363 uint32_t arg); ///< Pointer to \ref ARM_CAN_Control : Control CAN interface.
364 ARM_CAN_STATUS (*GetStatus) (void); ///< Pointer to \ref ARM_CAN_GetStatus : Get CAN status.
365 } const ARM_DRIVER_CAN;
371 #endif /* DRIVER_CAN_H_ */