Пример #1
0
/**
  * @brief  Select the start bank filter for slave CAN.
  * @note   This function applies only to STM32 Connectivity line devices.
  * @param  CAN_BankNumber: Select the start slave bank filter from 1..27.
  * @retval None.
  */
void CAN_SlaveStartBank(uint8_t CAN_BankNumber) 
{
  /* Check the parameters */
  assert_param(IS_CAN_BANKNUMBER(CAN_BankNumber));
  /* enter Initialisation mode for the filter */
  CAN1->FMR |= FMR_FINIT;
  /* Select the start slave bank */
  CAN1->FMR &= (uint32_t)0xFFFFC0F1 ;
  CAN1->FMR |= (uint32_t)(CAN_BankNumber)<<8;
  /* Leave Initialisation mode for the filter */
  CAN1->FMR &= ~FMR_FINIT;
}
Пример #2
0
/**
  * @brief  Configures the CAN reception filter according to the specified
  *         parameters in the CAN_FilterInitStruct.
  * @param  hcan: pointer to a CAN_HandleTypeDef structure that contains
  *         the configuration information for the specified CAN.
  * @param  sFilterConfig: pointer to a CAN_FilterConfTypeDef structure that
  *         contains the filter configuration information.
  * @retval None
  */
HAL_StatusTypeDef HAL_CAN_ConfigFilter(CAN_HandleTypeDef* hcan, CAN_FilterConfTypeDef* sFilterConfig)
{
  uint32_t filternbrbitpos = 0;
  
  /* Check the parameters */
  assert_param(IS_CAN_FILTER_NUMBER(sFilterConfig->FilterNumber));
  assert_param(IS_CAN_FILTER_MODE(sFilterConfig->FilterMode));
  assert_param(IS_CAN_FILTER_SCALE(sFilterConfig->FilterScale));
  assert_param(IS_CAN_FILTER_FIFO(sFilterConfig->FilterFIFOAssignment));
  assert_param(IS_FUNCTIONAL_STATE(sFilterConfig->FilterActivation));
  assert_param(IS_CAN_BANKNUMBER(sFilterConfig->BankNumber));
  
  filternbrbitpos = ((uint32_t)1) << sFilterConfig->FilterNumber;

  /* Initialisation mode for the filter */
  hcan->Instance->FMR |= (uint32_t)CAN_FMR_FINIT;
  
  /* Filter Deactivation */
  hcan->Instance->FA1R &= ~(uint32_t)filternbrbitpos;

  /* Filter Scale */
  if (sFilterConfig->FilterScale == CAN_FILTERSCALE_16BIT)
  {
    /* 16-bit scale for the filter */
    hcan->Instance->FS1R &= ~(uint32_t)filternbrbitpos;

    /* First 16-bit identifier and First 16-bit mask */
    /* Or First 16-bit identifier and Second 16-bit identifier */
    hcan->Instance->sFilterRegister[sFilterConfig->FilterNumber].FR1 = 
       ((0x0000FFFF & (uint32_t)sFilterConfig->FilterMaskIdLow) << 16) |
        (0x0000FFFF & (uint32_t)sFilterConfig->FilterIdLow);

    /* Second 16-bit identifier and Second 16-bit mask */
    /* Or Third 16-bit identifier and Fourth 16-bit identifier */
    hcan->Instance->sFilterRegister[sFilterConfig->FilterNumber].FR2 = 
       ((0x0000FFFF & (uint32_t)sFilterConfig->FilterMaskIdHigh) << 16) |
        (0x0000FFFF & (uint32_t)sFilterConfig->FilterIdHigh);
  }

  if (sFilterConfig->FilterScale == CAN_FILTERSCALE_32BIT)
  {
    /* 32-bit scale for the filter */
    hcan->Instance->FS1R |= filternbrbitpos;
    /* 32-bit identifier or First 32-bit identifier */
    hcan->Instance->sFilterRegister[sFilterConfig->FilterNumber].FR1 = 
       ((0x0000FFFF & (uint32_t)sFilterConfig->FilterIdHigh) << 16) |
        (0x0000FFFF & (uint32_t)sFilterConfig->FilterIdLow);
    /* 32-bit mask or Second 32-bit identifier */
    hcan->Instance->sFilterRegister[sFilterConfig->FilterNumber].FR2 = 
       ((0x0000FFFF & (uint32_t)sFilterConfig->FilterMaskIdHigh) << 16) |
        (0x0000FFFF & (uint32_t)sFilterConfig->FilterMaskIdLow);
  }

  /* Filter Mode */
  if (sFilterConfig->FilterMode == CAN_FILTERMODE_IDMASK)
  {
    /*Id/Mask mode for the filter*/
    hcan->Instance->FM1R &= ~(uint32_t)filternbrbitpos;
  }
  else /* CAN_FilterInitStruct->CAN_FilterMode == CAN_FilterMode_IdList */
  {
    /*Identifier list mode for the filter*/
    hcan->Instance->FM1R |= (uint32_t)filternbrbitpos;
  }

  /* Filter FIFO assignment */
  if (sFilterConfig->FilterFIFOAssignment == CAN_FILTER_FIFO0)
  {
    /* FIFO 0 assignation for the filter */
    hcan->Instance->FFA1R &= ~(uint32_t)filternbrbitpos;
  }

  if (sFilterConfig->FilterFIFOAssignment == CAN_FILTER_FIFO1)
  {
    /* FIFO 1 assignation for the filter */
    hcan->Instance->FFA1R |= (uint32_t)filternbrbitpos;
  }
  
  /* Filter activation */
  if (sFilterConfig->FilterActivation == ENABLE)
  {
    hcan->Instance->FA1R |= filternbrbitpos;
  }

  /* Leave the initialisation mode for the filter */
  hcan->Instance->FMR &= ~((uint32_t)CAN_FMR_FINIT);
  
  /* Return function status */
  return HAL_OK;
}