C2000 Launchpad SPI fails to work as expected

Hi,

I am trying to use the SPI peripheral of the C2000 launchpad, with limited success. After reading the relvant documentaion for the SPI module, I am initializing my module as
follows for a master transmitting 8-bits at 1MHz:

CLK_enableSpiaClock(myClk);

    SPI_reset(nrf8001Spi);

    SPI_setCharLength(nrf8001Spi,SPI_CharLength_8_Bits);
    SPI_setMode(nrf8001Spi,SPI_Mode_Master);
    SPI_enableTx(nrf8001Spi);
    SPI_enableInt(nrf8001Spi);

    SPI_setBaudRate(nrf8001Spi,SPI_BaudRate_1_MBaud);
    SPI_setClkPhase(nrf8001Spi,SPI_ClkPhase_Normal);
    SPI_setClkPolarity(nrf8001Spi,SPI_ClkPolarity_OutputRisingEdge_InputFallingEdge);

    SPI_disableTxFifo(nrf8001Spi);
    SPI_enableChannels(nrf8001Spi);

    SPI_setPriority(nrf8001Spi, SPI_Priority_FreeRun);

    SPI_enable(nrf8001Spi);
    PIE_enableInt(myPie,PIE_GroupNumber_6,PIE_InterruptSource_SPIARX);

I then try to transmit 3 bytes, but what I see in the logic analyzer are 8 correct clock transitions, with the right data on MOSI, followed by 1 or 2 clock transitions with no data.

SpiaRegs.SPICTL.bit.TALK = 1; // Enable Transmit path

    SpiaRegs.SPITXBUF = 0x06 << 8; // Master transmits data
    while(SpiaRegs.SPISTS.bit.INT_FLAG !=1) {} // Waits until data rx’d

    SpiaRegs.SPITXBUF = 0x0B << 8; // Master transmits data
    while(SpiaRegs.SPISTS.bit.INT_FLAG !=1) {} // Waits until data rx’d


    SpiaRegs.SPITXBUF = 0xAB << 8; // Master transmits data
    while(SpiaRegs.SPISTS.bit.INT_FLAG !=1) {} // Waits until data rx’d

I expect to see a total of 24 clock transitions. Is there a missing setting or errata issue?

Thank you.