STM32F303CCT6 - STM32CubeF3.1.2.0

Posted on September 04, 2015 at 15:00

Hello,

I'm having problems initializing the CAN peripheral, using generated code by Cube.

APB1 Peripheral clock is 32MHz (XTAL16*PLL4*0.5PRESC).

The device cannot get INAK cleared after clearing INRQ.

Pins seem to be correctly set up on the alternate function (Mode = AF_PP and Alternate = AF9_CAN).

Any help would be great!

Here are some code snippets.

void MX_CAN_Init(void)

{

  hcan.Instance = CAN;

  hcan.Init.Prescaler = 8;

  hcan.Init.Mode = CAN_MODE_NORMAL;

  hcan.Init.SJW = CAN_SJW_1TQ;

  hcan.Init.BS1 = CAN_BS1_8TQ;

  hcan.Init.BS2 = CAN_BS2_7TQ;

  hcan.Init.TTCM = DISABLE;

  hcan.Init.ABOM = DISABLE;

  hcan.Init.AWUM = DISABLE;

  hcan.Init.NART = DISABLE;

  hcan.Init.RFLM = DISABLE;

  hcan.Init.TXFP = DISABLE;

  HAL_CAN_Init(&hcan);

}

void HAL_CAN_MspInit(CAN_HandleTypeDef* hcan)

{

  GPIO_InitTypeDef GPIO_InitStruct;

  if(hcan->Instance==CAN)

  {

  /* USER CODE BEGIN CAN_MspInit 0 */

  /* USER CODE END CAN_MspInit 0 */

    /* Peripheral clock enable */

    __CAN_CLK_ENABLE();

  

    /**CAN GPIO Configuration    

    PB8     ------> CAN_RX

    PB9     ------> CAN_TX 

    */

    GPIO_InitStruct.Pin = GPIO_PIN_8|GPIO_PIN_9;

    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;

    GPIO_InitStruct.Pull = GPIO_NOPULL;

    GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;

    GPIO_InitStruct.Alternate = GPIO_AF9_CAN;

    HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

  /* USER CODE BEGIN CAN_MspInit 1 */

  /* USER CODE END CAN_MspInit 1 */

  }

}

/* Request leave initialisation */

    hcan->Instance->MCR &= ~(uint32_t)CAN_MCR_INRQ;

    /* Get timeout */

    tickstart = HAL_GetTick();   

   

    /* Wait the acknowledge */

    while((hcan->Instance->MSR & CAN_MSR_INAK) == CAN_MSR_INAK)

    {

      if((HAL_GetTick()-tickstart) > INAK_TIMEOUT)

      {

         hcan->State= HAL_CAN_STATE_TIMEOUT;

         return HAL_TIMEOUT;

      }

    } 

#stm32f3-can-cubemx