SPI CS / SPI-Enable manual control?

Hi Guys,

I'm using the ti-rtos spi driver to communicate to an fram chip. Unfortunately I can't seem to find how to control the SPI_CS on my cc3200 lp.

I need it to go to LOW at the beginning of the transmission and go HIGH after some frames and not get back up to HIGH in between frames. I would also like to keep the data size to 8 Bit. 

I've got a workaround by using an GPIO as CS, but it doesn't seem to switch as fast as an CS pin.

Code:

...
...
... 

while (1) {

    	/*Read Manufacturer ID, Continuation code, Product ID (1st Byte), Product ID (2nd Byte) */
    	MAP_GPIOPinWrite(GPIOA2_BASE,GPIO_PIN_6,0); //Set GPIO Pin 15 to 0
    	SPI_set_Data(read_Device_ID_Array);
    	SPITxRx = SPI_transmit_Data(&frameCount_ID);
    	MAP_GPIOPinWrite(GPIOA2_BASE,GPIO_PIN_6,GPIO_PIN_6); //Set GPIO Pin 15 to 1

Task_sleep (1000);
}

...
...
...

/*
 *  ======== SPI_init ========
 */
void SPI_Helper_init(uint8_t indexSPI)
{
	Error_Block eb;
	SPI_Params	spiParams;
	Error_init(&eb);

	SPI_Params_init(&spiParams);
	spiParams.bitRate = 8000000;
	spiParams.dataSize = 8;
	spiParams.mode = SPI_MASTER;
	spiParams.frameFormat = SPI_POL0_PHA0;
	spiHandle = SPI_open(indexSPI, &spiParams);

}

/*
 *  ======== SPI_set_Data ========
 */

void SPI_set_Data(uint8_t *txData)
{
	SPISend[0] = txData[0];
	SPISend[1] = txData[1];
	SPISend[2] = txData[2];
	SPISend[3] = txData[3];
	SPISend[4] = txData[4];
}

/*
 *  ======== SPI_transmit_Data ========
 */
uint8_t *SPI_transmit_Data(uint8_t *frameCount)
{
	SPI_Transaction spiTransaction;
	spiTransaction.count = *frameCount;
	spiTransaction.txBuf = SPISend;
	spiTransaction.rxBuf = SPIReceive;
	SPI_transfer(spiHandle, &spiTransaction);
	return SPIReceive;

}

 Logic:

Channel 4 is the GPIO which I use as CS. 

I'd like to keep CE / SPI-Enable LOW during the transmission.

Any suggestions?

Thanks