MSP432P401R: Software Algorithm equivalent for hardware CRC16

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//******************************************************************************
//!
//! CRC - Build Signature and Rebuild to test.
//!
//!  The CRC is first used to build a signature using a seed and multiple data
//!  values. This signature is considered as the checksum and can be sent by a
//!  UART connection along with the data to verify the correct data has been
//!  sent. The second half of this program is used to test the CRC checksum of
//!  the data that has been created, by recreating the same checksum and
//!  comparing it to the first checksum. If the two checksum are equal, then
//!  P1.0 is set and the LED is turned on. Breakpoints can be set before the
//!  CRC_setData() function to observe the CRC register values and see the
//!  subsequent signatures before/after each data set.
//!
//!  Tested On: MSP430F5529,MSP430FR5739
//!             -----------------
//!         /|\|                 |
//!          | |                 |
//!          --|RST              |
//!            |             P1.0|--> LED
//!            |                 |
//!
//!
//! This example uses the following peripherals and I/O signals.  You must
//! review these and change as needed for your own board:
//! - CRC peripheral
//! - GPIO Port peripheral
//!
//! This example uses the following interrupt handlers.  To use this example
//! in your own application you must add these interrupt handlers to your
//! vector table.
//! - NONE
//!
//******************************************************************************

#include "driverlib.h"

void main (void)
{
    //uint16_t crcSeed = 0xBEEF;
    uint16_t crcSeed = 0xFFFF;
//    uint16_t data[] = {0x0123,
//                           0x4567,
//                           0x8910,
//                           0x1112,
//                           0x1314};
    uint8_t data[] = {0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39};
    uint16_t crcResult;
    uint8_t i;

    //Stop WDT
    WDT_A_hold(WDT_A_BASE);

    //Set P1.0 as an output
    GPIO_setAsOutputPin(
        GPIO_PORT_P1,
        GPIO_PIN0);

    //Set the CRC seed
    CRC_setSeed(CRC_BASE,
        crcSeed);

//    for (i = 0; i < 5; i++)
    for (i = 0; i < 9; i++)
    {
        //Add all of the values into the CRC signature
//        CRC_set16BitData(CRC_BASE,
//            data[i]);
        /*
         * similar to 432 example
         */
        CRC_set8BitDataReversed(CRC_BASE,data[i]);

    }


    //Save the current CRC signature checksum to be compared for later
    crcResult = CRC_getResult(CRC_BASE);


    //*** Test the CRC ***//

    //Reset the CRC Signature and set the same seed
    CRC_setSeed(CRC_BASE,
        crcSeed);

//    for (i = 0; i < 5; i++)
    for (i = 0; i < 9; i++)
    {
        //Add all of the values into the CRC signature
//        CRC_set16BitData(CRC_BASE,
//            data[i]);
        /*
         * similar to 432 example
         */
        CRC_set8BitDataReversed(CRC_BASE,data[i]);
    }

    //Compare the 2 CRC Resulting Signature Checksums
    if (crcResult == CRC_getResult(CRC_BASE)){
        //set P1.0
        GPIO_setOutputHighOnPin(
            GPIO_PORT_P1,
            GPIO_PIN0);
    }

    //Enter LPM4, interrupts enabled
    __bis_SR_register(LPM4_bits);
    __no_operation();
}