CCS/MSP430FR5969: Need help with code to transmit byte of data using Launchpad

Tool/software: Code Composer Studio

Hi,

my customer needs help debugging his snippet of code to successfully transmit a byte of data.

Please and thank you!

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#include <msp430.h>

/**
* main.c
*/
volatile char received_ch = 0;
int main(void)
{
WDTCTL = WDTPW | WDTHOLD; // stop watchdog timer
P1OUT |= BIT3; //Declaring SS Pin
P1DIR |= BIT3;
P1SEL1 = BIT6; //Enabling MOSI output P1.6 UCB0SIMO
P2SEL1 = BIT2; //Enabling CLK output P2.2 UCB0CLK

UCB0CTL1 = UCSWRST;
UCB0CTL0 |= UCMSB + UCMST + UCMODE_2 + UCSYNC;
UCB0CTL0 |= UCSSEL_2;// control register sets up SPI parameters for SPI mode etc.

UCB0BR0 |= 0x02; // /2
UCB0BR1 = 0;
//UCB0MCTL = 0; // No modulation??
UCB0CTL1 &= ~UCSWRST; // **Initialize USCI state machine**

P1OUT &= (~BIT3); //Select Device

while (!(IFG2 & UCB0TXIFG)); // USCI_B0 TX buffer ready?
UCB0TXBUF = 0xA1; // Send 0xA1 over SPI to PLL
while (!(IFG2 & UCB0RXIFG)); // USCI_B0 RX Received?
received_ch = UCB0RXBUF; // Store received data

P1OUT |= (BIT3); // Unselect PLL

return 0;
}

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Thanks,
Kevin