FDCAN接收过滤器无效

最新推荐文章于 2025-04-08 10:34:30 发布

GWGG_2024

最新推荐文章于 2025-04-08 10:34:30 发布

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本文链接：https://blog.youkuaiyun.com/aidi1111/article/details/135675691

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本文介绍了如何在FDCAN硬件中配置全局过滤器，以控制不同类型的帧处理，包括非匹配标准和扩展ID，以及远程帧的接受策略。同时，展示了如何设置特定的标准ID过滤器以接收特定消息。

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需要另外配置全局过滤器以拒绝所有不匹配的 ID。

全局过滤器

调用此函数配置全局过滤器。

/**
  * @brief  Configure the FDCAN global filter.
  * @param  hfdcan pointer to an FDCAN_HandleTypeDef structure that contains
  *         the configuration information for the specified FDCAN.
  * @param  NonMatchingStd Defines how received messages with 11-bit IDs that
  *         do not match any element of the filter list are treated.
  *         This parameter can be a value of @arg FDCAN_Non_Matching_Frames.
  * @param  NonMatchingExt Defines how received messages with 29-bit IDs that
  *         do not match any element of the filter list are treated.
  *         This parameter can be a value of @arg FDCAN_Non_Matching_Frames.
  * @param  RejectRemoteStd Filter or reject all the remote 11-bit IDs frames.
  *         This parameter can be a value of @arg FDCAN_Reject_Remote_Frames.
  * @param  RejectRemoteExt Filter or reject all the remote 29-bit IDs frames.
  *         This parameter can be a value of @arg FDCAN_Reject_Remote_Frames.
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_FDCAN_ConfigGlobalFilter(FDCAN_HandleTypeDef *hfdcan,
                                               uint32_t NonMatchingStd,
                                               uint32_t NonMatchingExt,
                                               uint32_t RejectRemoteStd,
                                               uint32_t RejectRemoteExt)

接收过滤器

标准 ID，掩码模式，只接收 ID 为 0xFF 的消息。

void FDCAN1_Filter_Config(void)
{
    FDCAN_FilterTypeDef sFilterConfig0;
    sFilterConfig0.IdType = FDCAN_STANDARD_ID;
    sFilterConfig0.FilterIndex = 0;
    sFilterConfig0.FilterType = FDCAN_FILTER_MASK;
    sFilterConfig0.FilterConfig = FDCAN_FILTER_TO_RXFIFO0;
    sFilterConfig0.FilterID1 = 0xFF;
    sFilterConfig0.FilterID2 = 0x7FF;

    if (HAL_FDCAN_ConfigFilter(&hfdcan1, &sFilterConfig0) != HAL_OK)
    {
        Error_Handler();
    }

    HAL_FDCAN_ConfigGlobalFilter(&hfdcan1, FDCAN_REJECT, FDCAN_REJECT, DISABLE, DISABLE);
}