SPI Communication issue

Other Parts Discussed in Thread: MSP430F5529

Hi there,

I'm trying to communicate to SRAM(http://ww1.microchip.com/downloads/en/DeviceDoc/20005142C.pdf) using MSP430F5529LP over SPI(MSP_EXP430F5529LP_SPIB1). Proper communication is not happening.

Please review the code and help me.

/* XDCtools Header files */
#include <xdc/std.h>
#include <xdc/cfg/global.h>
#include <xdc/runtime/System.h>

/* BIOS Header files */
#include <ti/sysbios/BIOS.h>

/* TI-RTOS Header files */
#include <gpio.h>
#include <ti/drivers/SPI.h>

/* Example/Board Header files */
#include "Board.h"

SPI_Handle spiHandle;

uint8_t             rxBuffer[10];
uint8_t             txBuffer[10];
uint8_t             dummyBuffer[1];
SPI_Transaction     spiTransaction;
SPI_Params  SPIparams;

Void taskFxn (UArg arg0, UArg arg1)
{

    System_printf("Starting the SPI loop-back example\nSystem provider is set to");

/* INITIALISE SRAM */

    		GPIO_setOutputLowOnPin(GPIO_PORT_P4, GPIO_PIN0);

                    txBuffer[0] = 0x01;
                    txBuffer[1] = 0x40;
                    spiTransaction.count = 2;
                    spiTransaction.rxBuf = dummyBuffer;
                    spiTransaction.txBuf = txBuffer;
                    if ( !SPI_transfer(spiHandle, &spiTransaction) )
                    {
                    	while(1);
                    }

            GPIO_setOutputHighOnPin(GPIO_PORT_P4, GPIO_PIN0);


/* WRITE TO SRAM */
    		GPIO_setOutputLowOnPin(GPIO_PORT_P4, GPIO_PIN0);

    		   		txBuffer[0] = 2;
    		   		txBuffer[1] = 0;
    		   		txBuffer[2] = 0;
    		   		txBuffer[3] = 0;
    		   		txBuffer[4] = 5;
    		   		txBuffer[5] = 6;
    		   		txBuffer[6] = 2;
    		   		txBuffer[7] = 1;
                    spiTransaction.count = 8;
                    spiTransaction.rxBuf = dummyBuffer;
                    spiTransaction.txBuf = txBuffer;
                    if ( !SPI_transfer(spiHandle, &spiTransaction) )
                    {
                    	while(1);
                    }

            GPIO_setOutputHighOnPin(GPIO_PORT_P4, GPIO_PIN0);


/* REAM FROM SRAM */
    		GPIO_setOutputLowOnPin(GPIO_PORT_P4, GPIO_PIN0);

    		   		txBuffer[0] = 3;
    		   		txBuffer[1] = 0;
    		   		txBuffer[2] = 0;
    		   		txBuffer[3] = 0;
                    spiTransaction.count = 4;
                    spiTransaction.rxBuf = dummyBuffer;
                    spiTransaction.txBuf = txBuffer;
                    if ( !SPI_transfer(spiHandle, &spiTransaction) )
                    {
                    	while(1);
                    }

                    spiTransaction.count = 4;
                    spiTransaction.rxBuf = rxBuffer;
                    spiTransaction.txBuf = dummyBuffer;
                    if ( !SPI_transfer(spiHandle, &spiTransaction) )
                    {
                    	while(1);
                    }

            GPIO_setOutputHighOnPin(GPIO_PORT_P4, GPIO_PIN0);


    /* Deinitialize SPI */
    SPI_close(spiHandle);

    System_printf("Done\n");

    System_flush();
}


/*
 *  ======== main ========
 */
int main(void)
{
    /* Call board init functions. */
    Board_initGeneral();
    Board_initGPIO();
    Board_initSPI();

    /* Turn on user LED */
   // GPIO_write(Board_LED0, Board_LED_ON);

    System_printf("Starting the SPI loop-back example\nSystem provider is set to"
                  " SysMin. Halt the target to view any SysMin contents in ROV.\n");
    /* SysMin will only print to the console when you call flush or exit */
    System_flush();

    SPIparams.frameFormat = SPI_POL0_PHA1;
    SPIparams.bitRate = 1000000;
    SPIparams.mode = SPI_MASTER;
    SPIparams.transferCallbackFxn = NULL;
    SPIparams.dataSize = 8;
    SPIparams.transferMode = SPI_MODE_BLOCKING;
    SPIparams.transferTimeout = SPI_WAIT_FOREVER;

    /* Initialize SPI handle as default master */
    spiHandle = SPI_open(Board_SPI1, &SPIparams);
    if (spiHandle == NULL) {
        System_abort("Error initializing SPI\n");
    }
    else {
        System_printf("SPI initialized\n");
    }

    /* Start BIOS */
    BIOS_start();

    return (0);
}

I'm using CCSv6.1 with latest TI-RTOS for MSP430.

Thank you...