Macros | Functions
stm32f30x_can.c File Reference

This file provides firmware functions to manage the following functionalities of the Controller area network (CAN) peripheral: More...

#include "stm32f30x_can.h"
#include "stm32f30x_rcc.h"
Include dependency graph for stm32f30x_can.c:

Go to the source code of this file.


#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)0x00FFFFFF)
#define MCR_DBF   ((uint32_t)0x00010000) /* software master reset */
#define SLAK_TIMEOUT   ((uint32_t)0x00FFFFFF)
#define TMIDxR_TXRQ   ((uint32_t)0x00000001) /* Transmit mailbox request */


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:

MCD Application Team
  • 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);      
   (#) CAN pins configuration:
       (++) Enable the clock for the CAN GPIOs using the following function:
            RCC_AHBPeriphClockCmd(RCC_AHBPeriph_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_Recieve() 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.            

© COPYRIGHT 2014 STMicroelectronics

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:

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 stm32f30x_can.c.

Author(s): Daniel Koch , James Jackson
autogenerated on Thu Apr 15 2021 05:07:52