STM32 107 CAN过滤器和掩码 设置函数

likeqi2599

STM32 107 CAN过滤器和掩码 设置函数 [复制链接]

芯片资料没看到如何设置过滤器ID和掩码，结果弄了好久才搞清楚，原来固件库的接口还需要自己加工一下才行。
CP_VOID CanSetFilter(CAN_NUM_TypeDef byDevNo,CP_BYTE byFilterNumber,CP_DWORD dwId,CP_DWORD dwMask,CP_BYTE bIsStdId)
{
    assert_param(byFilterNumber<14);
    assert_param(IS_CAN_IDTYPE(bIsStdId));
    CAN_FilterInitTypeDef  CAN_FilterInitStructure;
    if(byDevNo  == CAN_1)
    {
        CAN_FilterInitStructure.CAN_FilterNumber=byFilterNumber;//CPU默认CAN2使用0-13号过滤器
    }
    else
    {
        CAN_FilterInitStructure.CAN_FilterNumber=byFilterNumber+14;//CPU默认CAN2使用14-27号过滤器
    }

    dwId = (dwId << 3) & 0xFFFFFFF8;//0位预留0，1位表示数据帧or远程帧，2位表示标准ID or 扩展ID

    dwId |= (((CP_DWORD)bIsStdId) & 0x00000007);

    dwMask = (dwMask << 3) & 0xFFFFFFF8;//0位预留0，1位表示数据帧or远程帧，2位表示标准ID or 扩展ID

    dwMask |= (((CP_DWORD)bIsStdId) & 0x00000007);
   
    CAN_FilterInitStructure.CAN_FilterMode=CAN_FilterMode_IdMask;
    CAN_FilterInitStructure.CAN_FilterScale=CAN_FilterScale_32bit;
    CAN_FilterInitStructure.CAN_FilterIdHigh=(CP_WORD)((dwId >> 16) & 0x0000FFFF);
    CAN_FilterInitStructure.CAN_FilterIdLow=(CP_WORD)(dwId & 0x0000FFFF);
    CAN_FilterInitStructure.CAN_FilterMaskIdHigh=(CP_WORD)((dwMask >> 16) & 0x0000FFFF);
    CAN_FilterInitStructure.CAN_FilterMaskIdLow=(CP_WORD)(dwMask & 0x0000FFFF);
    CAN_FilterInitStructure.CAN_FilterFIFOAssignment=0;
    CAN_FilterInitStructure.CAN_FilterActivation=ENABLE;

    CAN_FilterInit(&CAN_FilterInitStructure);
}

[ 本帖最后由 likeqi2599 于 2011-6-24 09:31 编辑 ]

astwyg

感谢分享.最好排下版

likeqi2599

呵呵，没发过，原来在代码模式下就可以了。。