BOOST-DRV8711: SPI MISO Not Functioning

/*
 * -------------------------------------------
 *    MSP432 DriverLib - v3_21_00_05 
 * -------------------------------------------
 *
 * --COPYRIGHT--,BSD,BSD
 * Copyright (c) 2016, Texas Instruments Incorporated
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * *  Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * *  Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * *  Neither the name of Texas Instruments Incorporated nor the names of
 *    its contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * --/COPYRIGHT--*/
/******************************************************************************
 * MSP432 Empty Project
 *
 * Description: An empty project that uses DriverLib
 *
 *                MSP432P401
 *             ------------------
 *         /|\|                  |
 *          | |                  |
 *          --|RST               |
 *            |                  |
 *            |                  |
 *            |                  |
 *            |                  |
 *            |                  |
 * Author: 
*******************************************************************************/
/* DriverLib Includes */
#include "driverlib.h"

/* Standard Includes */
#include <stdint.h>
#include <stdbool.h>

// My includes
#include "BoosterPackInterface.h"

static uint16_t packet = 0;
static uint8_t txByte = 0;

//void spi_init()
//{
//	SpiaRegs.SPICCR.bit.SPISWRESET = 0; // reset during configuration
//
//	// set configuration control register fields
//	SpiaRegs.SPICCR.bit.SPICHAR = 0xF; // 16-bit transactions
//	SpiaRegs.SPICCR.bit.CLKPOLARITY = 0; // data output on rising edge, input on falling
//	SpiaRegs.SPICCR.bit.SPILBK = 0; // disable loopback
//
//	// set operation control register fields
//	SpiaRegs.SPICTL.bit.CLK_PHASE = 1; // no phase delay for data
//	SpiaRegs.SPICTL.bit.MASTER_SLAVE = 1; // master mode on
//	SpiaRegs.SPICTL.bit.TALK = 1; // enable data output from this master device
//	SpiaRegs.SPICTL.bit.SPIINTENA = 0; // disable SPI interrupt
//
//	// set baud rate via maximum clock division in baud rate register
//	SpiaRegs.SPIBRR =0x007F; // set rate of transmission to slowest possible
//
//	// exit reset state
//	SpiaRegs.SPICCR.bit.SPISWRESET = 1; // done with configuration; clear reset
//
//	// keep CCS from messing with the transmission
//    SpiaRegs.SPIPRI.bit.FREE = 1;                // Set so breakpoints don't disturb xmission
//    SpiaRegs.SPIPRI.bit.STEINV = 1; // active high CS
//    SpiaRegs.SPIPRI.bit.TRIWIRE = 0; // 4-wire SPI
//}

/* SPI Master Configuration Parameter */
const eUSCI_SPI_MasterConfig spiMasterConfig =
{
        EUSCI_B_SPI_CLOCKSOURCE_SMCLK,             // SMCLK Clock Source
        3000000,                                   // SMCLK = DCO = 3MHZ
        50000,                                    // SPICLK = 500khz
        EUSCI_B_SPI_MSB_FIRST,                     // MSB First
		EUSCI_B_SPI_PHASE_DATA_CAPTURED_ONFIRST_CHANGED_ON_NEXT, // other phase option
		//EUSCI_B_SPI_PHASE_DATA_CHANGED_ONFIRST_CAPTURED_ON_NEXT,    // Phase default
        EUSCI_B_SPI_CLOCKPOLARITY_INACTIVITY_LOW, // Low polarity
        EUSCI_B_SPI_3PIN                           // 3Wire SPI Mode
};

int main(void)
{
    /* Halting WDT  */
    WDT_A_holdTimer();

    /* Selecting P1.5 P1.6 and P1.7 in SPI mode */
    GPIO_setAsPeripheralModuleFunctionInputPin(GPIO_PORT_P1,
            GPIO_PIN5 | GPIO_PIN6 | GPIO_PIN7, GPIO_PRIMARY_MODULE_FUNCTION);
    // configure CS pin
    GPIO_setAsOutputPin(GPIO_PORT_P3, GPIO_PIN6);

    ////////////////////////////////////////////////////////////////////////////////////////////
    // Configure GPIO
    ////////////////////////////////////////////////////////////////////////////////////////////

    // Port 6.0 is analog input from pot
    GPIO_setAsInputPin(GPIO_PORT_P6, GPIO_PIN0);
    // Ports 3.2, 3.3, 4.1 are inputs (NC)
    GPIO_setAsInputPin(GPIO_PORT_P3, GPIO_PIN2);
    GPIO_setAsInputPin(GPIO_PORT_P3, GPIO_PIN3);
    GPIO_setAsInputPin(GPIO_PORT_P4, GPIO_PIN1);
    // Port 4.3 is nSLEEP output (active low)
    GPIO_setAsOutputPin(GPIO_PORT_P4, GPIO_PIN3);
    // Port 4.6 is RESET output (active high)
    GPIO_setAsOutputPin(GPIO_PORT_P4, GPIO_PIN6);
    // Port 6.5 is STEP output
    GPIO_setAsOutputPin(GPIO_PORT_P6, GPIO_PIN5);
    // Port 6.4 is DIR output
    GPIO_setAsOutputPin(GPIO_PORT_P6, GPIO_PIN4);
    // Port 2.5 is nSTALL input
    GPIO_setAsInputPin(GPIO_PORT_P2, GPIO_PIN5);
    // Port 3.0 is nFAULT input
    GPIO_setAsInputPin(GPIO_PORT_P3, GPIO_PIN0);
    // Port 5.7 is an input (NC)
    GPIO_setAsInputPin(GPIO_PORT_P5, GPIO_PIN7);
    // Port 5.0 is B1 output
    GPIO_setAsOutputPin(GPIO_PORT_P5, GPIO_PIN0);
    // Port 5.2 is B2 output
    GPIO_setAsOutputPin(GPIO_PORT_P5, GPIO_PIN2);

    /////////////////////////////////////////////////////////////////////////////////////////////
    // Initialize GPIO
    /////////////////////////////////////////////////////////////////////////////////////////////
    // drive nSLEEP high (not in sleep mode)
    GPIO_setOutputHighOnPin(GPIO_PORT_P4, GPIO_PIN3);
    // drive RESET low (not in reset)
    GPIO_setOutputLowOnPin(GPIO_PORT_P4, GPIO_PIN6);
    // set STEP output low
    GPIO_setOutputLowOnPin(GPIO_PORT_P6, GPIO_PIN5);
    // set DIR output high
    GPIO_setOutputHighOnPin(GPIO_PORT_P6, GPIO_PIN4);
    // set B1 output low
    GPIO_setOutputLowOnPin(GPIO_PORT_P5, GPIO_PIN0);
    // set B2 output low
    GPIO_setOutputLowOnPin(GPIO_PORT_P5, GPIO_PIN2);


    /* Configuring SPI in 3wire master mode */
    SPI_initMaster(EUSCI_B0_BASE, &spiMasterConfig);

    /* Enable SPI module */
    SPI_enableModule(EUSCI_B0_BASE);

    // write to CTRL reg first
    packet = WRITE | CTRL_ADDR | DEADTIME_850 | SENSE_GAIN_40 | MODE_EIGHTH | ENABLE_MOTOR;

    while(1)
    {
    	GPIO_setOutputLowOnPin(GPIO_PORT_P3, GPIO_PIN6); // reset CS pin
        _delay_cycles(10000);
        /* Polling to see if the TX buffer is ready */
        while (!(SPI_getInterruptStatus(EUSCI_B0_BASE,EUSCI_B_SPI_TRANSMIT_INTERRUPT)));

    	GPIO_setOutputHighOnPin(GPIO_PORT_P3, GPIO_PIN6); // assert CS pin
        /* Transmitting data to slave */
    	txByte = packet >> 8;
        SPI_transmitData(EUSCI_B0_BASE, txByte); // transmit packet[15:8]
        while (!(SPI_getInterruptStatus(EUSCI_B0_BASE,EUSCI_B_SPI_TRANSMIT_INTERRUPT)));
        txByte = packet;
        SPI_transmitData(EUSCI_B0_BASE, txByte); // transmit packet[7:0]
        _delay_cycles(850); // hold CS high
        packet = READ | CTRL_ADDR; // from now on, read from the CTRL register
    }
}