CAN如何设置标准帧

发表于 2021-11-21 15:10

CAN如何设置标准帧

发表于 2021-11-21 15:15

楼主程序可以公开吗？贴程序看下吧，这么说看不出什么原因

发表于 2021-11-21 15:15

CAN_FilterInitStructure.CAN_FilterNumber=0;       //过滤器0
         CAN_FilterInitStructure.CAN_FilterMode=CAN_FilterMode_IdMask;
      CAN_FilterInitStructure.CAN_FilterScale=CAN_FilterScale_32bit; //32位
      CAN_FilterInitStructure.CAN_FilterIdHigh=0x0000;
      CAN_FilterInitStructure.CAN_FilterIdLow=0x0000;
      CAN_FilterInitStructure.CAN_FilterMaskIdHigh=0x0000;//32位MASK
      CAN_FilterInitStructure.CAN_FilterMaskIdLow=0x0000;
      CAN_FilterInitStructure.CAN_FilterFIFOAssignment=CAN_Filter_FIFO0;//过滤器0关联到FIFO0
      CAN_FilterInitStructure.CAN_FilterActivation=ENABLE; //激活过滤器0

      CAN_FilterInit(&CAN_FilterInitStructure);//滤波器初始化

求教：假如我想设置标准帧的ID为0x56C，应该怎么设置CAN_FilterInitStructure.CAN_FilterIdHigh和dCAN_FilterInitStructure.CAN_FilterIdLow 的值？

发表于 2021-11-21 15:17

这个得要自己配，对着手册来。

发表于 2021-11-21 15:20

https://mp.weixin.qq.com/s?__biz=MzA3OTIxMjQyNQ==&mid=2650948053&idx=1&sn=df92efcd987372bf480708074aed6d17&chksm=84401b33b3379225ecfb9c17e7c1f2051f5c09a78dc93ca2b959ab8e09eac423ed3bf8ad1f82&token=318093403&lang=zh_CN#rd

发表于 2021-11-21 15:23

手册上写的挺清楚的

发表于 2021-11-21 15:31

或者用代码生成工具

发表于 2021-11-21 15:34

对着寄存器说明自己设置是一样的

发表于 2021-11-21 15:36

默认的就是标准帧吧

发表于 2021-11-21 15:38

是的无需设置默认的就是

发表于 2021-11-21 15:42

这里的CAN_FilterId和CAN_FilterMaskId是配合使用的，意思是CAN_FilterId指出需要屏蔽ID的什么内容，什么格式；CAN_FilterMaskId是指CAN_FilterId的每一位是否需要过滤，若CAN_FilterMaskId在某位上是1的话，ID对应位上的数值就必须和CAN_FilterId该位上的一样，保持一致，反之则是“不关心”。

发表于 2021-11-21 15:44

嗯，那我按大家的说法挨个排查一下，谢谢哈

发表于 2021-11-22 14:30

复制

/********************************************************************************************************************************************************************************************

**函数名称:                CanSetRxFilter        

**函数功能:        

**入口参数:

**返回参数:

*********************************************************************************************************************************************************************************************/

void CanSetRxFilter(BYTE num,UINT32 FilterID1,UINT32 FilterID2)

{

        CAN_FilterInitTypeDef  CAN_FilterInitStructure;

        CAN_FilterInitStructure.CAN_FilterNumber = num;

        CAN_FilterInitStructure.CAN_FilterMode = CAN_FilterMode_IdList;

        CAN_FilterInitStructure.CAN_FilterScale = CAN_FilterScale_32bit;

        printf("\r\n num: %d FilterID1: %08x FilterID2: %08x",num,FilterID1,FilterID2);

        if(FilterID1 > 0x800)

        {

                

                CAN_FilterInitStructure.CAN_FilterIdHigh=((FilterID1 << 3 )>> 16) & 0xffff;

                CAN_FilterInitStructure.CAN_FilterIdLow=((FilterID1 << 3)& 0xffff) | CAN_ID_EXT;

        }

        else

        {

                CAN_FilterInitStructure.CAN_FilterIdHigh = FilterID1 << 5;

                CAN_FilterInitStructure.CAN_FilterIdLow = 0|CAN_ID_STD;

        }





        if(FilterID2 > 0x800)

        {

                

                CAN_FilterInitStructure.CAN_FilterMaskIdHigh=((FilterID2 << 3 )>> 16) & 0xffff;

                CAN_FilterInitStructure.CAN_FilterMaskIdLow=((FilterID2 << 3)& 0xffff) | CAN_ID_EXT;

        }

        else

        {

                CAN_FilterInitStructure.CAN_FilterMaskIdHigh = FilterID2 << 5;

                CAN_FilterInitStructure.CAN_FilterMaskIdLow = 0|CAN_ID_STD;

        }



        

        CAN_FilterInitStructure.CAN_FilterFIFOAssignment = CAN_FIFO0;

        CAN_FilterInitStructure.CAN_FilterActivation = ENABLE;

        

        CAN_FilterInit(&CAN_FilterInitStructure);

}

发表于 2021-11-22 14:32

兼容过滤标准帧和扩展帧

[STM32F1] CAN如何设置标准帧

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