xref: /btstack/port/msp432p401lp-cc256x/ti/devices/msp432p4xx/driverlib/crc32.c (revision 5fd0122a3e19d95e11e1f3eb8a08a2b2acb2557e)

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 * Copyright (c) 2017, Texas Instruments Incorporated
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 * *  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
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 *    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
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 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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#include <ti/devices/msp432p4xx/driverlib/crc32.h>
#include <ti/devices/msp432p4xx/inc/msp.h>
#include <ti/devices/msp432p4xx/driverlib/debug.h>


void CRC32_setSeed(uint32_t seed, uint_fast8_t crcType)
{
    ASSERT((CRC16_MODE == crcType) || (CRC32_MODE == crcType));

    if (CRC16_MODE == crcType)
        CRC32->INIRES16 = seed;
    else
    {
        CRC32->INIRES32_HI = ((seed & 0xFFFF0000) >> 16);
        CRC32->INIRES32_LO = (seed & 0xFFFF);
    }
}

void CRC32_set8BitData(uint8_t dataIn, uint_fast8_t crcType)
{
    ASSERT((CRC16_MODE == crcType) || (CRC32_MODE == crcType));

    if (CRC16_MODE == crcType)
        HWREG8(&(CRC32->DI16)) = dataIn;
    else
        HWREG8(&(CRC32->DI32)) = dataIn;
}

void CRC32_set16BitData(uint16_t dataIn, uint_fast8_t crcType)
{
    ASSERT((CRC16_MODE == crcType) || (CRC32_MODE == crcType));

    if (CRC16_MODE == crcType)
        CRC32->DI16 = dataIn;
    else
        CRC32->DI32 = dataIn;
}

void CRC32_set32BitData(uint32_t dataIn)
{
    //CRC32->DI32 = dataIn & 0xFFFF;
    //CRC32->DI32 = (uint16_t) ((dataIn & 0xFFFF0000) >> 16);

    HWREG16(&(CRC32->DI32)) = dataIn & 0xFFFF;
    HWREG16(&(CRC32->DI32)) = (uint16_t)(
            (dataIn & 0xFFFF0000) >> 16);
}

void CRC32_set8BitDataReversed(uint8_t dataIn, uint_fast8_t crcType)
{
    ASSERT((CRC16_MODE == crcType) || (CRC32_MODE == crcType));

    if (CRC16_MODE == crcType)
        HWREG8(&(CRC32->DIRB16)) = dataIn;
    else
        HWREG8(&(CRC32->DIRB32)) = dataIn;
}

void CRC32_set16BitDataReversed(uint16_t dataIn, uint_fast8_t crcType)
{
    ASSERT((CRC16_MODE == crcType) || (CRC32_MODE == crcType));

    if (CRC16_MODE == crcType)
        CRC32->DIRB16 = dataIn;
    else
        CRC32->DIRB32 = dataIn;
}

void CRC32_set32BitDataReversed(uint32_t dataIn)
{
    //CRC32->DIRB32 = dataIn & 0xFFFF;
    //CRC32->DIRB32 = (uint16_t) ((dataIn & 0xFFFF0000) >> 16);

    HWREG16(&(CRC32->DIRB32)) = dataIn & 0xFFFF;
    HWREG16(&(CRC32->DIRB32)) = (uint16_t)(
            (dataIn & 0xFFFF0000) >> 16);

}

uint32_t CRC32_getResult(uint_fast8_t crcType)
{
    uint32_t result;
    ASSERT((CRC16_MODE == crcType) || (CRC32_MODE == crcType));

    if (CRC16_MODE == crcType)
        return CRC32->INIRES16;
    else
    {
        result = CRC32->INIRES32_HI;
        result = (result << 16);
        result |= (uint32_t) CRC32->INIRES32_LO;
        return (result);
    }
}

uint32_t CRC32_getResultReversed(uint_fast8_t crcType)
{
    uint32_t result;
    ASSERT((CRC16_MODE == crcType) || (CRC32_MODE == crcType));

    if (CRC16_MODE == crcType)
        return CRC32->RESR16;
    else
    {
        result = CRC32->RESR32_HI;
        result = (result << 16);
        result |= (uint32_t) CRC32->RESR32_LO;
        return (result);
    }
}