MSP430G2553: SPI reading using oscilloscope issue

Part Number: MSP430G2553

Hello TI,

I have an issue with SPI communication between two MSP430G2553 boards.

What I did is that I created a Master version and a Slave one, where I send a byte from the master and receive it in the slave hand and I receive it correctly.

Now the problem is that I wanted to use Analog Discovery to display sent packets (because the next step ill be to replace the slave by a TMS320C5402 DSP), so I only need to verify that the communication is ON, the problem I faced is that in the Analog Discovery (using WaveForms) I don't get the sent byte (0xAA) but I get several different values and I don't if I missed something or what?

And this is the code i'm using

#include <msp430.h> 
#include <msp430g2553.h>


/*
 *  P1.0  -> SS   (NOT USED)
 *  P1.1  -> MISO
 *  P1.2  -> MOSI
 *  P1.4  -> CLK
 *  P1.5  -> STE (NOT USED)
 *
 */

#define SS_PIN      BIT0
#define MISO_PIN    BIT1
#define MOSI_PIN    BIT2
#define CLK_PIN     BIT4
#define STE_PIN     BIT5


void main(void) {
    WDTCTL = WDTPW + WDTHOLD;             // Stop watchdog timer


      BCSCTL1 = CALBC1_1MHZ;                    // Set DCO to 1MHz
      DCOCTL  = CALDCO_1MHZ;

    P1SEL  =   MISO_PIN    |   MOSI_PIN    |   CLK_PIN; //   |  STE_PIN;
    P1SEL2 =   MISO_PIN    |   MOSI_PIN    |   CLK_PIN; //   |  STE_PIN;

    UCA0CTL1   =   UCSWRST;
    UCA0CTL0   |=  UCCKPH  +   UCMSB   +   UCMST   +   UCSYNC; //  3-pin,  8-bit   SPI master
    UCA0CTL1   |=  UCSSEL_2;   //  SMCLK
    UCA0BR0    |=  0x02;   //  /2
    UCA0BR1    =   0;  //
    UCA0MCTL   =   0;  //  No  modulation
    UCA0CTL1   &=  ~UCSWRST;   //  **Initialize    USCI    state   machine**


    _BIS_SR(GIE);                           // Enable interrupts
    i=0;
    while(1)
    {
        while  (!(IFG2 &   UCA0TXIFG));    //  USCI_A0 TX  buffer  ready?
        UCA0TXBUF  =   0xAA;   //  Send    0xAA    over    SPI to  Slave

        P1OUT ^= BIT0;
        __delay_cycles(1000);
    }
}