CC2510 spi interface problem

Hello Texas Instruments!

I am having problems configuring a CC2510 for SPI.  I would like to use the CC2510 as the master device.  I am having trouble seeing a serial clock signal (SCK) on the oscilloscope on P1_5 (SCK).  I am also having trouble toggling P1_6 (MOSI) with a simple toggle example in the code.  Does anyone see a problem with my code regarding why I can not toggle P1_6 and why I don't see a serial clock signal on P1_5?

Is it necessary to put data on the UxDBUF, in order for a serial clock signal to appear on P1_5?  The reason why I ask this question is that I have peripheral devices that require a SCK all of the time.

Note:  Comment the forever for loop out when testing other parts of the program not related to toggling P1_6.

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#define BUFFER_SIZE 0x05

static uint8 txBufferMaster[BUFFER_SIZE];

int main(void)

 {

uint8 value = 0x00;    

int i;    

for (i = 0; i< BUFFER_SIZE; i++)    

 {        

txBufferMaster[i] = value++;    

 }

// Configure USART1 for Alternative 2 location => Port P1 (PERCFG.U1CFG = 1)    

PERCFG |= 0x02;    //PERCFG.U1CFG = 1        

P1SEL |= 0xE0;    //P1_7, P1_6, and P1_5 are set up as peripherals    

P1SEL &= ~0x1F;   //P1_4, P1_3, P1_2, P1_1, P1_0 are set up as general purpose I/O    

P1DIR |= 0x1D;    //P1_4 is output, P1_3 is output, P1_2 is output,                      

//P1_1 is input, P1_0 is output    

P2SEL |= 0x40;    //Give priority to USART1 over USART0 for port 1 pins                      

 //Give priority to USART1 over Timer 3 for port 1 pins                      

//Give priority to Timer 1 over Timer 4                      

//Give priority to USART0 over Timer 1

for (;;)    

 {        

 volatile unsigned int i; // volatile to prevent optimization        

 P1_6 ^= 0x01; // Toggle P1_6 using exclusive-OR        

i = 10000; // SW Delay        

do i--;        

while (i != 0);

}

/* Configure SPI1     

*/        

SLEEP &= ~SLEEP_OSC_PD;    

while(!(SLEEP & SLEEP_XOSC_S));   //monitor XOSC stable status bit    

CLKCON = 0x00; //select HS crystal oscillator & system clock source to 26 Mhz

// Set USART to SPI mode and Master mode        

U1CSR &= ~0xA0;

// Set Baud Rate (SCK frequency) equal to 9596 bps for a 26 MHz system clock    

// (high speed crystal oscialltor)       

U1BAUD = 0x83;    // BAUD_M = 131    

U1GCR |= 0x08;    // BAUD_E = 8

// - negative clock polarity (SCK low when idle)    

// - clock phase for data centered on second edge of SCK period    

// - bit order for transfers to MSB first        

U1GCR |= 0x60;    // CPOL = 0, CPHA = 1, ORDER = 1

/* Transfer data      */

// Set SSN to active low        

P1_4 = 0;

for (i = 0; i < BUFFER_SIZE; i++)    

{        

// Write byte to USART1 buffer (transmit data)        

U1DBUF = txBufferMaster[i];

        // Check if byte is transmitted        

while(!U1TX_BYTE);

        // Clear transmit byte status        

U1TX_BYTE = 0;    

}

// Set SSN to active high    

P1_4 = 1;

// When finished transmitting, set green LED    

P1_0 = 0;   // Set SRF04EB LED1

         return 0;

}