CCS/IWR1642BOOST: Can't open SPI driver

Carlos del Amo

Part Number: AWR1642BOOST
Other Parts Discussed in Thread: SYSBIOS, IWR1642, MMWAVE-SDK

Tool/software: Code Composer Studio

I'm trying to implement SPI communication in Traffic Monitoring demo, using this code:

    SPI_Params_init(&params);
    params.mode  = SPI_MASTER;
    //params.u.masterParams.bitRate = gMmwMssMCB.cfg.sysClockFrequency;
    params.u.masterParams.numSlaves = 1;
    params.u.masterParams.slaveProf[0].chipSelect = 0;
    params.u.masterParams.slaveProf[0].ramBufLen = MIBSPI_RAM_MAX_ELEM/2;
    params.u.masterParams.slaveProf[0].dmaCfg.txDmaChanNum =1U;
    params.u.masterParams.slaveProf[0].dmaCfg.rxDmaChanNum =0U;
    params.u.masterParams.slaveProf[1].chipSelect = 1;
    params.u.masterParams.slaveProf[1].ramBufLen = MIBSPI_RAM_MAX_ELEM/2;
    params.u.masterParams.slaveProf[1].dmaCfg.txDmaChanNum =3U;
    params.u.masterParams.slaveProf[1].dmaCfg.rxDmaChanNum =2U;
 
    SPIhandle = SPI_open(0, &params);
    if (!SPIhandle) {
        System_printf("!!!!!!!!!!!!! SPI did not open\n");
    }

debugging,when it reaches SPI_open, SPIhandle points to null, so it doesn't open the SPI driver. Why is this?

over 6 years ago

0 Carlos del Amo over 6 years ago

Intellectual 270 points

also, when I put SPIhandle in the watch section of the debugger, I get the following:

0 JohnH over 6 years ago in reply to Carlos del Amo

TI__Mastermind 21295 points

Hello Carlos,

Please see the C:\ti\mmwave_sdk_<ver>\packages\ti\drivers\spi\test directory for a working SPI driver test code reference.

Regards,
John

0 Carlos del Amo over 6 years ago in reply to JohnH

Intellectual 270 points

Hi, I think I'm doing everything that it makes in the test code and still can't get it working. Can you be more specific?

0 Carlos del Amo over 6 years ago in reply to Carlos del Amo

Intellectual 270 points

If I add the following lines to the code:

    params.dmaEnable = 1;
    params.dmaHandle = dmaHandleS;
    params.eccEnable = 1;

the program crashes with this console feed:

Debug: System Heap (TCM): Size: 98304, Used = 4880, Free = 93424 bytes
ti.sysbios.heaps.HeapMem: line 446: assertion failure: A_invalidFree: Invalid free
xdc.runtime.Error.raise: terminating execution.

Also, I've noticed that if I comment the UART driver opening code, as follows,

/* Open the Logging UART Instance: */
    /*gMmwMssMCB.loggingUartHandle = UART_open(1, &uartParams);
    if (gMmwMssMCB.loggingUartHandle == NULL)
    {
        System_printf("Error: MMWDemoMSS Unable to open the Logging UART Instance\n");
        return;
    }*/

SPI driver then opens, but then the program crashes at some point that needs to use the UART_WritePolling function instead

0 JohnH over 6 years ago in reply to Carlos del Amo

TI__Mastermind 21295 points

Hi Carlos,

What is the ES version of your IWR1642 device? You can use the IWR1642 errata doc to verify the device markings.

What mmWave-SDK version are you using?

What Traffic Monitoring lab version are you using?

Regards,
John

0 Carlos del Amo over 6 years ago in reply to JohnH

Intellectual 270 points

Hi, I figured out the solution. I was using the same DMA handle for both the spi and uart drivers, and it made some kind of conflict. I declared another dma handle and now it works correctly.

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CCS/IWR1642BOOST: Can't open SPI driver