To begin, I have a question regarding the CanTxMsgTypeDef and the CanRxMsgTypeDef configurations (listed here.)
My question is, how to properly initialize the parameters :
uint8_t Data[8]; of CanTxMsgTypeDef
and
uint8_t Data[8]; CanRxMsgTypeDef
I can load each element of the tx individually but it would seem that I should be able to pass a pointer. Similarly, the rx element would be a pointer.
How does this work?
typedef struct
{
uint32_t StdId; /*!< Specifies the standard identifier.
This parameter must be a number between Min_Data = 0 and Max_Data = 0x7FF. */
uint32_t ExtId; /*!< Specifies the extended identifier.
This parameter must be a number between Min_Data = 0 and Max_Data = 0x1FFFFFFF. */
uint32_t IDE; /*!< Specifies the type of identifier for the message that will be transmitted.
This parameter can be a value of @ref CAN_identifier_type */
uint32_t RTR; /*!< Specifies the type of frame for the message that will be transmitted.
This parameter can be a value of @ref CAN_remote_transmission_request */
uint32_t DLC; /*!< Specifies the length of the frame that will be transmitted.
This parameter must be a number between Min_Data = 0 and Max_Data = 8. */
uint8_t Data[8]; /*!< Contains the data to be transmitted.
This parameter must be a number between Min_Data = 0 and Max_Data = 0xFF. */
}CanTxMsgTypeDef;
//CAN Rx message structure definition
typedef struct
{
uint32_t StdId; /*!< Specifies the standard identifier.
This parameter must be a number between Min_Data = 0 and Max_Data = 0x7FF. */
uint32_t ExtId; /*!< Specifies the extended identifier.
This parameter must be a number between Min_Data = 0 and Max_Data = 0x1FFFFFFF. */
uint32_t IDE; /*!< Specifies the type of identifier for the message that will be received.
This parameter can be a value of @ref CAN_identifier_type */
uint32_t RTR; /*!< Specifies the type of frame for the received message.
This parameter can be a value of @ref CAN_remote_transmission_request */
uint32_t DLC; /*!< Specifies the length of the frame that will be received.
This parameter must be a number between Min_Data = 0 and Max_Data = 8. */
uint8_t Data[8]; /*!< Contains the data to be received.
This parameter must be a number between Min_Data = 0 and Max_Data = 0xFF. */
uint32_t FMI; /*!< Specifies the index of the filter the message stored in the mailbox passes through.
This parameter must be a number between Min_Data = 0 and Max_Data = 0xFF. */
uint32_t FIFONumber; /*!< Specifies the receive FIFO number.
This parameter can be CAN_FIFO0 or CAN_FIFO1 */
}CanRxMsgTypeDef;
