CAN RX Filtering using the function of CANMessageSet()

Hi,

I made a CAN RX filtering function.
It works well, but when I mix it with filter disabling function, sometimes the filtering fails.

I have an interrupt service routine, so my tm4c1290nczad controller receives the messages
with CAN ID 0x100. Usually my filter function works fine.
But, after I run these enable/disable functions in random times,
I can't see 0x100 messages even after running the enable function
or I can see 0x100 messages even after running the disable function.

When I commented the disable function and run the only enable function multiple times,
I've never seen this type of error.

Do you have any idea?

Regards,

Young

int main()
{
    ...
    while (1)
    {
        CAN_EnableReceivingFilter(8, 0x100, 0xfff);
        delay(0.5);     // 0.5s
        CAN_DisableReceivingFilter(8);
        delay(0.5);     // 0.5s
    }
    ...
}

void CAN_EnableReceivingFilter(uint32_t canObjId, uint32_t msgId, uint32_t msgIdMask)
{
    tCANMsgObject msgObj;

    msgObj.ui32MsgID = msgId;
    msgObj.ui32MsgIDMask = msgIdMask;
    msgObj.ui32Flags = MSG_OBJ_RX_INT_ENABLE | MSG_OBJ_USE_ID_FILTER;

    CANMessageSet(CAN_BASE, canObjId, &msgObj, MSG_OBJ_TYPE_RX);
}

void CAN_DisableReceivingFilter(uint32_t canObjId)
{
    tCANMsgObject msgObj;

    msgObj.ui32MsgID = 0xfff;
    msgObj.ui32MsgIDMask = 0xfff;
    msgObj.ui32Flags = 0;

    CANMessageSet(CAN_BASE, canObjId, &msgObj, MSG_OBJ_TYPE_RX);
}