TDA4AL-Q1: On issues with increasing load on the can_fd bus

Hi,

The logic of the receiver is as follows, please help to see how to solve the problem of low number of received frames.Thanks.

When our APP_MCAN_FIFO_0_NUM configuration is 5 and water mask configuration is 3, when RX interrupt is triggered, several packets are saved in FIFO at this time

#define APP_MCAN_FIFO_0_NUM (5U)
msgRAMConfigParams.rxFIFO0size = APP_MCAN_FIFO_0_NUM;
msgRAMConfigParams.rxFIFO0waterMark = 3U;
msgRAMConfigParams.rxFIFO0OpMode = 1U;

The interrupt function is as follows,

static void App_mcan2Intr1ISR(uintptr_t arg)
{
    uint32_t intrStatus;

    intrStatus = MCAN_getIntrStatus(gCan2ModAddr);
    //appLogPrintf("---CAN2---ISR1---intrStatus = 0x%x\n",intrStatus);
    MCAN_clearIntrStatus(gCan2ModAddr, intrStatus);

    if (MCAN_INTR_SRC_DEDICATED_RX_BUFF_MSG ==
        (intrStatus & MCAN_INTR_SRC_DEDICATED_RX_BUFF_MSG))
    {
        gMcan2IsrIntr1Flag = 0U;
        APP_mcan2RxTest();
    }
    if(MCAN_INTR_SRC_RX_FIFO0_NEW_MSG ==
        (intrStatus & MCAN_INTR_SRC_RX_FIFO0_NEW_MSG))
    {
        gMcan2IsrIntr1Flag = 0U;
        APP_mcan2RxTest();
    }
}

If there are multiple packets, how do I read them all?
Read the function code as follows,

static void APP_mcan2RxTest(void)
{
    MCAN_RxNewDataStatus newDataStatus;
    MCAN_ErrCntStatus    errCounter;

    {
        while (gMcan2IsrIntr1Flag)
        {}
        gMcan2IsrIntr1Flag = 1U;
        /* Checking for Errors */
        MCAN_getErrCounters(gCan2ModAddr, &errCounter);
        if ((0U == errCounter.recErrCnt) &&
            (0U == errCounter.canErrLogCnt))
        {
            MCAN_getNewDataStatus(gCan2ModAddr, &newDataStatus);
            MCAN_clearNewDataStatus(gCan2ModAddr, &newDataStatus);
            MCAN_readMsgRam(gCan2ModAddr,
                MCAN_MEM_TYPE_FIFO,
                //MCAN_MEM_TYPE_BUF,
                0U,
                0U,
                &rxMsg);
			// ...
		}
	}
}

Hello, 

Please expect delay in my response, as today is holiday in TI India.

Regards

Tarun Mukesh 

Hello,

Thanks for waiting.

May i which SDK you are facing the issue ? Is it MCAL driver or PDK driver ?

li liu said:

The current demand is that can_fd1 and can_fd2 should be combined into group1 and the bus load rate should reach 60%. can_fd1 is used to realize the load demand, and the standard frame message length is 48 bytes, which can achieve the required load rate, but the receiving side can only receive about 1000 frames of data by using interrupt mode.

What does combined into group 1 mean here?

Which CAN instances are you using ?

Regards

Tarun Mukesh

Hello,

Thank you for your reply, the problem appears in the can instance in the SDK.

I am sorry that I could not give you the feedback in time because of the recent National Day holiday.

The demand for 60% load has been turned off.

Thanks

Hello li liu,

li liu said:

I am sorry that I could not give you the feedback in time because of the recent National Day holiday.

No issues.Understandable.

Is the problem still open here ?

Regards

Tarun Mukesh