This file provides firmware functions to manage the following functionalities of the Controller area network (CAN) peripheral: More...
Include dependency graph for stm32f4xx_can.c:
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Macros | |
| #define | CAN_FLAGS_ESR ((uint32_t)0x00F00000) |
| #define | CAN_FLAGS_MSR ((uint32_t)0x01000000) |
| #define | CAN_FLAGS_RF0R ((uint32_t)0x02000000) |
| #define | CAN_FLAGS_RF1R ((uint32_t)0x04000000) |
| #define | CAN_FLAGS_TSR ((uint32_t)0x08000000) |
| #define | CAN_MODE_MASK ((uint32_t) 0x00000003) |
| #define | CAN_TXMAILBOX_0 ((uint8_t)0x00) |
| #define | CAN_TXMAILBOX_1 ((uint8_t)0x01) |
| #define | CAN_TXMAILBOX_2 ((uint8_t)0x02) |
| #define | FMR_FINIT ((uint32_t)0x00000001) /* Filter init mode */ |
| #define | INAK_TIMEOUT ((uint32_t)0x0000FFFF) |
| #define | MCR_DBF ((uint32_t)0x00010000) /* software master reset */ |
| #define | SLAK_TIMEOUT ((uint32_t)0x0000FFFF) |
| #define | TMIDxR_TXRQ ((uint32_t)0x00000001) /* Transmit mailbox request */ |
Functions | |
| void | CAN_CancelTransmit (CAN_TypeDef *CANx, uint8_t Mailbox) |
| Cancels a transmit request. More... | |
| void | CAN_ClearFlag (CAN_TypeDef *CANx, uint32_t CAN_FLAG) |
| Clears the CAN's pending flags. More... | |
| void | CAN_ClearITPendingBit (CAN_TypeDef *CANx, uint32_t CAN_IT) |
| Clears the CANx's interrupt pending bits. More... | |
| void | CAN_DBGFreeze (CAN_TypeDef *CANx, FunctionalState NewState) |
| Enables or disables the DBG Freeze for CAN. More... | |
| void | CAN_DeInit (CAN_TypeDef *CANx) |
| Deinitializes the CAN peripheral registers to their default reset values. More... | |
| void | CAN_FIFORelease (CAN_TypeDef *CANx, uint8_t FIFONumber) |
| Releases the specified receive FIFO. More... | |
| void | CAN_FilterInit (CAN_FilterInitTypeDef *CAN_FilterInitStruct) |
| Configures the CAN reception filter according to the specified parameters in the CAN_FilterInitStruct. More... | |
| FlagStatus | CAN_GetFlagStatus (CAN_TypeDef *CANx, uint32_t CAN_FLAG) |
| Checks whether the specified CAN flag is set or not. More... | |
| ITStatus | CAN_GetITStatus (CAN_TypeDef *CANx, uint32_t CAN_IT) |
| Checks whether the specified CANx interrupt has occurred or not. More... | |
| uint8_t | CAN_GetLastErrorCode (CAN_TypeDef *CANx) |
| Returns the CANx's last error code (LEC). More... | |
| uint8_t | CAN_GetLSBTransmitErrorCounter (CAN_TypeDef *CANx) |
| Returns the LSB of the 9-bit CANx Transmit Error Counter(TEC). More... | |
| uint8_t | CAN_GetReceiveErrorCounter (CAN_TypeDef *CANx) |
| Returns the CANx Receive Error Counter (REC). More... | |
| uint8_t | CAN_Init (CAN_TypeDef *CANx, CAN_InitTypeDef *CAN_InitStruct) |
| Initializes the CAN peripheral according to the specified parameters in the CAN_InitStruct. More... | |
| void | CAN_ITConfig (CAN_TypeDef *CANx, uint32_t CAN_IT, FunctionalState NewState) |
| Enables or disables the specified CANx interrupts. More... | |
| uint8_t | CAN_MessagePending (CAN_TypeDef *CANx, uint8_t FIFONumber) |
| Returns the number of pending received messages. More... | |
| uint8_t | CAN_OperatingModeRequest (CAN_TypeDef *CANx, uint8_t CAN_OperatingMode) |
| Selects the CAN Operation mode. More... | |
| void | CAN_Receive (CAN_TypeDef *CANx, uint8_t FIFONumber, CanRxMsg *RxMessage) |
| Receives a correct CAN frame. More... | |
| void | CAN_SlaveStartBank (uint8_t CAN_BankNumber) |
| Select the start bank filter for slave CAN. More... | |
| uint8_t | CAN_Sleep (CAN_TypeDef *CANx) |
| Enters the Sleep (low power) mode. More... | |
| void | CAN_StructInit (CAN_InitTypeDef *CAN_InitStruct) |
| Fills each CAN_InitStruct member with its default value. More... | |
| uint8_t | CAN_Transmit (CAN_TypeDef *CANx, CanTxMsg *TxMessage) |
| Initiates and transmits a CAN frame message. More... | |
| uint8_t | CAN_TransmitStatus (CAN_TypeDef *CANx, uint8_t TransmitMailbox) |
| Checks the transmission status of a CAN Frame. More... | |
| void | CAN_TTComModeCmd (CAN_TypeDef *CANx, FunctionalState NewState) |
| Enables or disables the CAN Time TriggerOperation communication mode. More... | |
| uint8_t | CAN_WakeUp (CAN_TypeDef *CANx) |
| Wakes up the CAN peripheral from sleep mode . More... | |
| static ITStatus | CheckITStatus (uint32_t CAN_Reg, uint32_t It_Bit) |
| Checks whether the CAN interrupt has occurred or not. More... | |
Detailed Description
This file provides firmware functions to manage the following functionalities of the Controller area network (CAN) peripheral:
- Version
- V1.1.0
- Date
- 11-January-2013
- Initialization and Configuration
- CAN Frames Transmission
- CAN Frames Reception
- Operation modes switch
- Error management
- Interrupts and flags
===============================================================================
##### How to use this driver #####
===============================================================================
[..]
(#) Enable the CAN controller interface clock using
RCC_APB1PeriphClockCmd(RCC_APB1Periph_CAN1, ENABLE); for CAN1
and RCC_APB1PeriphClockCmd(RCC_APB1Periph_CAN2, ENABLE); for CAN2
-@- In case you are using CAN2 only, you have to enable the CAN1 clock.
(#) CAN pins configuration
(++) Enable the clock for the CAN GPIOs using the following function:
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOx, ENABLE);
(++) Connect the involved CAN pins to AF9 using the following function
GPIO_PinAFConfig(GPIOx, GPIO_PinSourcex, GPIO_AF_CANx);
(++) Configure these CAN pins in alternate function mode by calling
the function GPIO_Init();
(#) Initialise and configure the CAN using CAN_Init() and
CAN_FilterInit() functions.
(#) Transmit the desired CAN frame using CAN_Transmit() function.
(#) Check the transmission of a CAN frame using CAN_TransmitStatus()
function.
(#) Cancel the transmission of a CAN frame using CAN_CancelTransmit()
function.
(#) Receive a CAN frame using CAN_Receive() function.
(#) Release the receive FIFOs using CAN_FIFORelease() function.
(#) Return the number of pending received frames using
CAN_MessagePending() function.
(#) To control CAN events you can use one of the following two methods:
(++) Check on CAN flags using the CAN_GetFlagStatus() function.
(++) Use CAN interrupts through the function CAN_ITConfig() at
initialization phase and CAN_GetITStatus() function into
interrupt routines to check if the event has occurred or not.
After checking on a flag you should clear it using CAN_ClearFlag()
function. And after checking on an interrupt event you should
clear it using CAN_ClearITPendingBit() function.@attention
<h2><center>© COPYRIGHT 2013 STMicroelectronics</center></h2>
Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
You may not use this file except in compliance with the License.
You may obtain a copy of the License at:
http://www.st.com/software_license_agreement_liberty_v2
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.
Definition in file stm32f4xx_can.c.