STM32F37 Standard Peripheral bibliotheek  1.0
ST Microelectronics bibliotheek documentatie voor de STM32F37 Standard Peripheral Library
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stm32f37x_can.c File Reference

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

#include "stm32f37x_can.h"
#include "stm32f37x_rcc.h"


#define MCR_DBF   ((uint32_t)0x00010000) /* software master reset */
#define TMIDxR_TXRQ   ((uint32_t)0x00000001) /* Transmit mailbox request */
#define FMR_FINIT   ((uint32_t)0x00000001) /* Filter init mode */
#define INAK_TIMEOUT   ((uint32_t)0x0000FFFF)
#define SLAK_TIMEOUT   ((uint32_t)0x0000FFFF)
#define CAN_FLAGS_TSR   ((uint32_t)0x08000000)
#define CAN_FLAGS_RF1R   ((uint32_t)0x04000000)
#define CAN_FLAGS_RF0R   ((uint32_t)0x02000000)
#define CAN_FLAGS_MSR   ((uint32_t)0x01000000)
#define CAN_FLAGS_ESR   ((uint32_t)0x00F00000)
#define CAN_TXMAILBOX_0   ((uint8_t)0x00)
#define CAN_TXMAILBOX_1   ((uint8_t)0x01)
#define CAN_TXMAILBOX_2   ((uint8_t)0x02)
#define CAN_MODE_MASK   ((uint32_t) 0x00000003)


void CAN_DeInit (CAN_TypeDef *CANx)
 Deinitializes the CAN peripheral registers to their default reset values. 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_FilterInit (CAN_FilterInitTypeDef *CAN_FilterInitStruct)
 Configures the CAN reception filter according to the specified parameters in the CAN_FilterInitStruct. More...
void CAN_StructInit (CAN_InitTypeDef *CAN_InitStruct)
 Fills each CAN_InitStruct member with its default value. More...
void CAN_SlaveStartBank (uint8_t CAN_BankNumber)
 Select the start bank filter for slave CAN. More...
void CAN_DBGFreeze (CAN_TypeDef *CANx, FunctionalState NewState)
 Enables or disables the DBG Freeze for CAN. More...
void CAN_TTComModeCmd (CAN_TypeDef *CANx, FunctionalState NewState)
 Enables or disables the CAN Time TriggerOperation communication mode. 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_CancelTransmit (CAN_TypeDef *CANx, uint8_t Mailbox)
 Cancels a transmit request. More...
void CAN_Receive (CAN_TypeDef *CANx, uint8_t FIFONumber, CanRxMsg *RxMessage)
 Receives a correct CAN frame. More...
void CAN_FIFORelease (CAN_TypeDef *CANx, uint8_t FIFONumber)
 Releases the specified receive FIFO. 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...
uint8_t CAN_Sleep (CAN_TypeDef *CANx)
 Enters the Sleep (low power) mode. More...
uint8_t CAN_WakeUp (CAN_TypeDef *CANx)
 Wakes up the CAN peripheral from sleep mode . More...
uint8_t CAN_GetLastErrorCode (CAN_TypeDef *CANx)
 Returns the CANx's last error code (LEC). More...
uint8_t CAN_GetReceiveErrorCounter (CAN_TypeDef *CANx)
 Returns the CANx Receive Error Counter (REC). More...
uint8_t CAN_GetLSBTransmitErrorCounter (CAN_TypeDef *CANx)
 Returns the LSB of the 9-bit CANx Transmit Error Counter(TEC). More...
void CAN_ITConfig (CAN_TypeDef *CANx, uint32_t CAN_IT, FunctionalState NewState)
 Enables or disables the specified CANx interrupts. More...
FlagStatus CAN_GetFlagStatus (CAN_TypeDef *CANx, uint32_t CAN_FLAG)
 Checks whether the specified CAN flag is set or not. More...
void CAN_ClearFlag (CAN_TypeDef *CANx, uint32_t CAN_FLAG)
 Clears the CAN's pending flags. More...
ITStatus CAN_GetITStatus (CAN_TypeDef *CANx, uint32_t CAN_IT)
 Checks whether the specified CANx interrupt has occurred or not. More...
void CAN_ClearITPendingBit (CAN_TypeDef *CANx, uint32_t CAN_IT)
 Clears the CANx's interrupt pending bits. 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); for CAN1 

    (#) 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()

    (#) Cancel the transmission of a CAN frame using CAN_CancelTransmit()

    (#) 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.            

<h2><center>&copy; COPYRIGHT 2012 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.
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