msp430f5529lp与ADXL345通信不成功

我想用msp430f5529lp读取ADXL345加速度传感器，我用的是SPI方式通信，目前连ADXL345的器件ID都读取失败了，请大神看看我代码有什么问题吗？

ADXL345的驱动是别人已经测试过能用的，自己写的函数就是初始化spi，读寄存器和写寄存器函数。谢谢大神！

/*初始化spi*/

void SpiUsciSet(void)                                   
{
    UCB0CTL1 |= UCSWRST;                            
    UCB0CTL0 |= UCCKPH + UCMSB + UCMST + UCSYNC;    /
    UCB0CTL0 &= ~UCCKPH;
    UCB0CTL1 |= UCSSEL_2;                           

    UCB0BR0 = 0x04;
    UCB0BR1 = 0;
    P3SEL |= BIT0 + BIT1 + BIT2;                    

    P3DIR |= BIT3;                          // P3.3 - Slave Select
    P3OUT |= BIT3;                              // Slave Select - inactive ( high)

    UCB0CTL1 &= ~UCSWRST;                           // **Initialize USCI state machine**
}

/*获取寄存器数值*/
unsigned char ADXL345_GetRegisterValue(unsigned char RegisterAddress)
{
    unsigned int read_data;
    unsigned short Address;
    unsigned int a;
    Address=(unsigned short)RegisterAddress;
    Address |= 0x80;

    P3OUT &= ~BIT3;             // 片选STE0置低

      while (!(UCB0IFG & UCTXIFG));  // USART0 TX buffer ready?

      UCB0TXBUF = Address;

      while (!(UCB0IFG & UCRXIFG));  // 等待发送结束       ------->程序停留在此语句，无法继续运行

      

      while (!(UCB0IFG & UCTXIFG));  // USART0 TX buffer ready?

      UCB0TXBUF = 0xFF;

      while (!(UCB0IFG & UCRXIFG));  // 等待发送结束

      read_data = UCB0RXBUF;

      P3OUT |= BIT3;              // 片选STE0置高

    return read_data;
}

/*设置寄存器数值*/
void ADXL345_SetRegisterValue(INT08U RegisterAddress,INT08U RegisterValue)
{
    unsigned int b;
    RegisterAddress &= 0x7f;
    P3OUT &= ~BIT3;             // 片选STE0置低
    while (!(UCB0IFG & UCTXIFG));  // USART0 TX buffer ready?

    UCB0TXBUF = RegisterAddress;

    while (!(UCB0IFG & UCRXIFG));  // 等待发送结束       

              

    while (!(UCB0IFG & UCTXIFG));  // USART0 TX buffer ready?

    UCB0TXBUF = RegisterValue;

    while (!(UCB0IFG & UCRXIFG));  // 等待发送结束

  

    P3OUT |= BIT3;              // 片选STE0置高


}