TI RTOS SPI Slave on CC2650

I am using TI-RTOS SPI drivers for using 2650 (4*4 package) in the slave configuration. But It doesn't seems to work.  I checked the data coming to the 2650 from the SPI master its perfect . My master's bitRate is 100000.

SPI_Handle handle;
SPI_Params params;
SPI_Transaction transaction;uint8_t rxBuf[100];     // Receive buffer

// Init SPI and specify non-default parameters
SPI_Params_init(&params);
params.bitRate     = 1000000;
params.frameFormat = SPI_POL1_PHA1;
params.mode        = SPI_SLAVE;

// Configure the transaction
transaction.count = 100;
transaction.txBuf = NULL;
transaction.rxBuf = rxBuf;

// Open the SPI and perform the transfer
handle = SPI_open(Board_SPI, &params);
SPI_transfer(handle, &transaction);

My board.h file is 

/* SPI Board */

#define Board_SPI0_MISO                     IOID_6          /* RF1.4  */
#define Board_SPI0_MOSI                     IOID_5          /* RF1.2  */
#define Board_SPI0_CLK                      IOID_7          /* RF1.14 */
#define Board_SPI0_CSN                      IOID_3          /* RF1.12 */

board.c

Board_SPI0_CSN | PIN_GPIO_OUTPUT_EN | PIN_GPIO_HIGH | PIN_PUSHPULL,                         /* SPI           

Is there any other configuration that needs to be made?