SPI - can't see ChipSelect

Hi,

I want to use SPI1 in 4-pin master mode in transmit operation. I use the PSP drivers (v1.20) together with the OMAP-L137 EVM from Spectrum Digital. PINMUX and PSC should be correctly configured. On the scope I see the clock and the data correctly, but no chip select.

Did I forget to configure something or did I configure something wrong? Could you please help? Thank you very much. I need some urgent help.

Here's what I do...

static void spi_initParams(void) {
    spiParams = Spi_PARAMS;
   
    spiParams.hwiNumber = 8;
    spiParams.spiHWCfgData.intrLevel = FALSE;
    spiParams.opMode = Spi_OpMode_DMAINTERRUPT;
   
    spiParams.outputClkFreq     = 1000000;
    spiParams.loopbackEnabled   = FALSE;
    spiParams.edmaHandle        = NULL;
   
    spiParams.spiHWCfgData.pinOpModes = Spi_PinOpMode_SPISCS_4PIN;
    spiParams.spiHWCfgData.configDatafmt[0].charLength   = 16;    /* 8bit Addr + 8bit Data */
    spiParams.spiHWCfgData.configDatafmt[1].charLength   = 16;
    spiParams.spiHWCfgData.configDatafmt[0].clkHigh      = TRUE ;
    spiParams.spiHWCfgData.configDatafmt[0].lsbFirst     = FALSE;
    spiParams.spiHWCfgData.configDatafmt[0].oddParity    = FALSE;
    spiParams.spiHWCfgData.configDatafmt[0].parityEnable = FALSE ;
    spiParams.spiHWCfgData.configDatafmt[0].phaseIn      = FALSE ;
    spiParams.spiHWCfgData.configDatafmt[0].waitEnable   = FALSE;
    //spiParams.spiHWCfgData.configDatafmt[0].wdelay       = 0;
    spiParams.spiHWCfgData.intrLevel     = TRUE;

    /* power on the spi device in the Power sleep controller                  */
    Psc_ModuleClkCtrl(Psc_DevId_1, PSC_LPSC_SPI1, TRUE);
}

static void start_spi() {
    GIO_Attrs           gioAttrs = GIO_ATTRS;

    Spi_ChanParams      chanParams;  

//...

       edmaResult = edma3init();

//...

    chanParams.hEdma = hEdma;

    /* create SPI channel for transmission */
    spiHandle =  GIO_create("/Spi1",IOM_INOUT,NULL,&chanParams,&gioAttrs);

//...

    return;
}

static Int spi_fpga_send_serial() {

    Spi_DataParam       dataparam;
    size_t              size = 0;

    // clear the input and output buffers
    memset(loopWrite, 0x00, sizeof(loopWrite));

    // clear the spi params data structure
    memset(&dataparam,0x00, sizeof(Spi_DataParam));

    loopWrite[0] = 0x92;
    dataparam.bufLen       = 0x01;
    dataparam.inBuffer     = NULL;
    dataparam.outBuffer    = &loopWrite[0];
    dataparam.dataFormat   = Spi_DataFormat_0;

    size = dataparam.bufLen;

    // write program to FPGA
    GIO_write(spiHandle, &dataparam, &size);

    return 0;
}