CCS/IWR6843: "SPI_transfer" not work in "MmwDemo_mboxReadTask"

Hi sir,

Any update?

Is there possible the root cause is about the task size or task priority?

BR

Thanks

Frank

Hi Silkworm,

How did you solve that issue? I can make SPI_open successfully, but SPI_transfer didn't perform. I'd appreciate if you can share your code or tell me the way to solve it.

My root cause is I re-defined GPIO pin in another function.

After I mark it the SPI is worked.

FYI

BR

Hi Silkworm,

1. Do you mean GPIO pinmux settings?

2. I modified SPI code in SDK -> driver->test folder. It doesn't contain any GPIO settings. Do you come up with another cause based on my code below?

    SPI_Params     params;
    SPI_Handle     handle;

    SPI_Params_init(&params);

    params.mode = SPI_SLAVE;
    params.u.slaveParams.dmaCfg.txDmaChanNum =1U;
    params.u.slaveParams.dmaCfg.rxDmaChanNum =0U;

    /* Enable DMA and set DMA channels */
    params.dmaEnable = 1;
    params.dmaHandle = gDmaHandle;

    params.frameFormat = SPI_POL0_PHA0;
    params.pinMode = SPI_PINMODE_4PIN_CS;
    params.transferMode = SPI_MODE_BLOCKING;
    params.transferTimeout = SPI_WAIT_FOREVER;
    params.bitRate  = 1000000;
    params.dataSize = 8;

    handle = SPI_open(0, &params);
    if (handle == NULL)
    {
        System_printf("Error: Unable to open the SPI Instance\n");
        return;
    }
    System_printf("Debug: SPI Instance %p has been reopened in Slave Mode successfully\n", handle);   
        
    SPI_Transaction transaction;

    /* Configure Data Transfer */
	transaction.count = SPI_TEST_MSGLEN;
	transaction.txBuf = (void *)txBuf;
	transaction.rxBuf = (void *)rxBuf;
    //transaction.slaveIndex = 0U;

    /* Start Data Transfer */
	if (SPI_transfer(handle, &transaction) != true)
	{
		System_printf("Unsuccessful SPI transfer");
	}
   
	else
	{
		System_printf("SPI transfer OK\n");
	}

I mean the another init function affect the SPI work.

In my case is the CANFD init.

After mark it my SPI function is work and I also refer to the driver test code too.

FYI

BR

Thanks

Previously, I also couldn't run UART and SPI simultaneously. But after changed some parameters of SPI, UART can run via GUI demo. Even though I solved that issue, I'm still a little unclear about the way to make multiple tasks run simultaneously. Do u have any idea how to make SPI and CAN-FD run simultaneously without having to mark one of them?