IWR6843AOP: SPI instance cannot open.

Haotian Liu

Part Number: IWR6843AOP

Hi,

I wrote the following code, but SPIA cannot be opened.

/* Setup the SPI Parameters */
    SPI_Params_init(&spiParams);
    spiParams.mode                                              = SPI_MASTER;
    spiParams.u.masterParams.bitRate                            = 40000000;
    spiParams.u.masterParams.numSlaves                          = 1;
    spiParams.u.masterParams.slaveProf[0].chipSelect            = 0;
    spiParams.u.masterParams.slaveProf[0].ramBufLen             = MIBSPI_RAM_MAX_ELEM;
    spiParams.u.masterParams.slaveProf[0].dmaCfg.txDmaChanNum   = 1U;
    spiParams.u.masterParams.slaveProf[0].dmaCfg.rxDmaChanNum   = 0U;

/* Open the SPI Instance */
    gMmwMssMCB.spiHandle = SPI_open(0, &spiParams);
    if (gMmwMssMCB.spiHandle == NULL)
    {
        System_printf("Error: MMWDemoMSS Unable to open the SPI Instance\n");
        //return;
    }

How should I modify it?

Regards,

Haotian

over 3 years ago

0 Brennan Hartigan over 3 years ago

TI__Genius 10754 points

Hi Haotian,

I have a couple suggestions for you.

Take a look at the SPI driver as a reference. This is found in the mmWave SDK: <INSTALL_LOCATION>\mmwave_sdk_03_05_00_04\packages\ti\drivers\spi\src\SPI.c
Try running the SPI driver test. This is also found in the mmWave SDK: <INSTALL_LOCATION>\mmwave_sdk_03_05_00_04\packages\ti\drivers\spi\test\xwr68xx
Check and verify your hardware setup - software pinmux, mux switches on the board, where you have SPI wired to the board, etc
You can also CCS debug to figure out what error you are getting (if you have a MMWAVEICBOOST, the necessary hardware for CCS debugging a TI mmWave EVM)

Regards,

Brennan

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IWR6843AOP: SPI instance cannot open.