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Код: Выделить всё

#include "stm32f2xx_hal.h"

CAN_HandleTypeDef hcan1;
static void MX_CAN1_Init(void);

int main(void)
{

  while (1)
  {
 
//Смотрю значения до присваивания и вывожу в UART. Результат следующий: по идее, там - мусор)
  hcan1.pTxMsg->DLC = 0xF5;
  hcan1.pTxMsg->Data[0] = 0xE1;
  hcan1.pTxMsg->Data[1] = 0x01;
  hcan1.pTxMsg->Data[2] = 0x00;
  hcan1.pTxMsg->Data[3] = 0x08;
  hcan1.pTxMsg->Data[4] = 0x1B;           
  hcan1.pTxMsg->Data[5] = 0x19;           
  hcan1.pTxMsg->Data[6] = 0x00;           
  hcan1.pTxMsg->Data[7] = 0x08; 
  
//Присваиваю значения членам структуры pTxMsg

  hcan1.pTxMsg->DLC = 0x08;
  hcan1.pTxMsg->Data[0] = 0x00;
  hcan1.pTxMsg->Data[1] = 0x01;
  hcan1.pTxMsg->Data[2] = 0x02;
  hcan1.pTxMsg->Data[3] = 0x03;
  hcan1.pTxMsg->Data[4] = 0x04;           
  hcan1.pTxMsg->Data[5] = 0x05;           
  hcan1.pTxMsg->Data[6] = 0x06;           
  hcan1.pTxMsg->Data[7] = 0x07;  
  
//Смотрю значения членов структуры после присваивания и вывожу в UART. Результат -  тот же самый мусор

  hcan1.pTxMsg->DLC = 0xF5;
  hcan1.pTxMsg->Data[0] = 0xE1;
  hcan1.pTxMsg->Data[1] = 0x01;
  hcan1.pTxMsg->Data[2] = 0x00;
  hcan1.pTxMsg->Data[3] = 0x08;
  hcan1.pTxMsg->Data[4] = 0x1B;           
  hcan1.pTxMsg->Data[5] = 0x19;           
  hcan1.pTxMsg->Data[6] = 0x00;           
  hcan1.pTxMsg->Data[7] = 0x08;
  
  
  }


}


/* CAN1 init function */
void MX_CAN1_Init(void)
{

  hcan1.Instance = CAN1;
  hcan1.Init.Prescaler = 5;
  hcan1.Init.Mode = CAN_MODE_NORMAL;
  hcan1.Init.SJW = CAN_SJW_1TQ;
  hcan1.Init.BS1 = CAN_BS1_6TQ;
  hcan1.Init.BS2 = CAN_BS2_5TQ;
  hcan1.Init.TTCM = DISABLE;
  hcan1.Init.ABOM = DISABLE;
  hcan1.Init.AWUM = DISABLE;
  hcan1.Init.NART = DISABLE;
  hcan1.Init.RFLM = DISABLE;
  hcan1.Init.TXFP = DISABLE;
  HAL_CAN_Init(&hcan1);

}

Код: Выделить всё

* @file    stm32f2xx_hal_can.h
 typedef struct
{
  CAN_TypeDef                 *Instance;  /*!< Register base address          */

  CAN_InitTypeDef             Init;       /*!< CAN required parameters        */

  CanTxMsgTypeDef*            pTxMsg;     /*!< Pointer to transmit structure  */

  CanRxMsgTypeDef*            pRxMsg;     /*!< Pointer to reception structure */

  __IO HAL_CAN_StateTypeDef   State;      /*!< CAN communication state        */

  HAL_LockTypeDef             Lock;       /*!< CAN locking object             */

  __IO uint32_t               ErrorCode;  /*!< CAN Error code                 */

}CAN_HandleTypeDef;

typedef struct
{
  uint32_t Prescaler;  /*!< Specifies the length of a time quantum.
                            This parameter must be a number between Min_Data = 1 and Max_Data = 1024 */

  uint32_t Mode;       /*!< Specifies the CAN operating mode.
                            This parameter can be a value of @ref CAN_operating_mode */

  uint32_t SJW;        /*!< Specifies the maximum number of time quanta
                            the CAN hardware is allowed to lengthen or
                            shorten a bit to perform resynchronization.
                            This parameter can be a value of @ref CAN_synchronisation_jump_width */

  uint32_t BS1;        /*!< Specifies the number of time quanta in Bit Segment 1.
                            This parameter can be a value of @ref CAN_time_quantum_in_bit_segment_1 */

  uint32_t BS2;        /*!< Specifies the number of time quanta in Bit Segment 2.
                            This parameter can be a value of @ref CAN_time_quantum_in_bit_segment_2 */

  uint32_t TTCM;       /*!< Enable or disable the time triggered communication mode.
                            This parameter can be set to ENABLE or DISABLE. */

  uint32_t ABOM;       /*!< Enable or disable the automatic bus-off management.
                            This parameter can be set to ENABLE or DISABLE */

  uint32_t AWUM;       /*!< Enable or disable the automatic wake-up mode.
                            This parameter can be set to ENABLE or DISABLE */

  uint32_t NART;       /*!< Enable or disable the non-automatic retransmission mode.
                            This parameter can be set to ENABLE or DISABLE */

  uint32_t RFLM;       /*!< Enable or disable the receive FIFO Locked mode.
                            This parameter can be set to ENABLE or DISABLE */

  uint32_t TXFP;       /*!< Enable or disable the transmit FIFO priority.
                            This parameter can be set to ENABLE or DISABLE */
}CAN_InitTypeDef;

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