Compiler/MSP430F5328: SPI receive not working .....

Tool/software: TI C/C++ Compiler

Hi All,

I am using MSP430F5328 controller, trying to communicate with Winbound Serial Flash (W25X10CL) using SPI.

I have configured the SPI Init and trying to read the Device ID but not receiving anything.

Below is my intialization:

#define SPICLK        500000

int main()
{
    uint16_t IDcode = 0;
    
    //Set P2.6 for slave reset
    GPIO_setAsOutputPin( GPIO_PORT_P2, GPIO_PIN6 );
    GPIO_setOutputHighOnPin( GPIO_PORT_P2, GPIO_PIN6 );
    
    //P3.3,4 option select 
    //FLASH_SPISIMO - P3.3
    //FLASH_SPISOMI - P3.4
    GPIO_setAsPeripheralModuleFunctionInputPin(
            GPIO_PORT_P3,
            GPIO_PIN3 + GPIO_PIN4 );
    //P2.7 FLASH_SPICLK
    GPIO_setAsPeripheralModuleFunctionInputPin(
            GPIO_PORT_P2,
            GPIO_PIN7);
            
    //Initialize Master
    USCI_A_SPI_initMasterParam param = {0};
    param.selectClockSource = USCI_A_SPI_CLOCKSOURCE_SMCLK;
    param.clockSourceFrequency = UCS_getSMCLK();
    param.desiredSpiClock = SPICLK;
    param.msbFirst = USCI_A_SPI_MSB_FIRST;
    param.clockPhase = USCI_A_SPI_PHASE_DATA_CHANGED_ONFIRST_CAPTURED_ON_NEXT;
    param.clockPolarity = USCI_A_SPI_CLOCKPOLARITY_INACTIVITY_LOW;
    returnValue = USCI_A_SPI_initMaster(USCI_A0_BASE, &param);                

    if (STATUS_FAIL == returnValue)
            return 0;
    
    //Enable SPI module
    USCI_A_SPI_enable(USCI_A0_BASE);
    //Now with SPI signals initialized, reset slave
        GPIO_setOutputLowOnPin(
                GPIO_PORT_P2,
                GPIO_PIN6
                );
                
    IDcode = W25X10_ReadID();            
                
    return 0;
                
}

void W25X10_SendData( uint8_t *buf, uint32_t Length )
{
  uint32_t i;      
  for ( i = 0; i < Length; i++ )
  {    
      // USCI_A0 TX buffer ready?
      while (!(UCA0IFG&UCTXIFG));
      UCA0TXBUF = *buf;
      buf++;      
  }  
}

void W25X10_RcvData( uint8_t *buf, uint32_t Length )
{
    uint32_t i;   
    for ( i = 0; i < Length; i++ )
    {           
        // USCI_A0 RX buffer ready?
        while (!(UCA0IFG&UCRXIFG));
        *buf = USCI_A_SPI_receiveData(USCI_A0_BASE);
        buf++;
    } 
}

uint16_t W25X10_ReadID(void)
{
    uint16_t IDcode;

    W25X10_CS0();            // P2.6 -- 0, CS = 0 Select SPI Flash
    w25srcaddr[0] = 0x90;    // Read device commands     0x90
    w25srcaddr[1] = 0x00;    // The upper part of the device address 0x00
    w25srcaddr[2] = 0x00;    // The lower part of the device address 0x00 
    w25srcaddr[3] = 0x00;   
    W25X10_SendData ( (uint8_t *)&w25srcaddr[0],  4 ); // SSP send data 
    W25X10_RcvData( (uint8_t *)&w25destaddr[0], 2 ); // SSP Receive data
    W25X10_CS1(); // P2.6 -- 1, CS = 1 Release the SPI Flash
    IDcode = (w25destaddr[0] << 8)|(w25destaddr[1]); // Get the IDcode
    return IDcode;         // Returns the ID number
}

Does anyone know why i am not receiving data on UCA0RXBUF & what mistake i am doing ?

Thanks for any help.