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/* --COPYRIGHT--,BSD
* Copyright (c) 2014, 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--*/
//*****************************************************************************
//
// crc32.c - Driver for the crc32 Module.
//
//*****************************************************************************
//*****************************************************************************
//
//! \addtogroup crc32_api crc32
//! @{
//
//*****************************************************************************
#include "inc/hw_regaccess.h"
#include "inc/hw_memmap.h"
#ifdef __MSP430_HAS_CRC32__
#include "crc32.h"
#include <assert.h>
void CRC32_setSeed(uint32_t seed,
uint8_t crcMode)
{
if(CRC16_MODE == crcMode)
{
HWREG16(CRC32_BASE + OFS_CRC16INIRESW0) = seed;
}
else
{
HWREG16(CRC32_BASE + OFS_CRC32INIRESW1) = ((seed & 0xFFFF0000)
>> 16);
HWREG16(CRC32_BASE + OFS_CRC32INIRESW0) = (seed & 0xFFFF);
}
}
void CRC32_set8BitData(uint8_t dataIn,
uint8_t crcMode)
{
if(CRC16_MODE == crcMode)
{
HWREG8(CRC32_BASE + OFS_CRC16DIW0_L) = dataIn;
}
else
{
HWREG8(CRC32_BASE + OFS_CRC32DIW0_L) = dataIn;
}
}
void CRC32_set16BitData(uint16_t dataIn,
uint8_t crcMode)
{
if(CRC16_MODE == crcMode)
{
HWREG16(CRC32_BASE + OFS_CRC16DIW0) = dataIn;
}
else
{
HWREG16(CRC32_BASE + OFS_CRC32DIW0) = dataIn;
}
}
void CRC32_set32BitData(uint32_t dataIn)
{
HWREG16(CRC32_BASE + OFS_CRC32DIW0) = dataIn & 0xFFFF;
HWREG16(CRC32_BASE + OFS_CRC32DIW1) = (uint16_t) ((dataIn & 0xFFFF0000)
>> 16);
}
void CRC32_set8BitDataReversed(uint8_t dataIn,
uint8_t crcMode)
{
if(CRC16_MODE == crcMode)
{
HWREG8(CRC32_BASE + OFS_CRC16DIRBW1_L) = dataIn;
}
else
{
HWREG8(CRC32_BASE + OFS_CRC32DIRBW1_L) = dataIn;
}
}
void CRC32_set16BitDataReversed(uint16_t dataIn,
uint8_t crcMode)
{
if(CRC16_MODE == crcMode)
{
HWREG16(CRC32_BASE + OFS_CRC16DIRBW1) = dataIn;
}
else
{
HWREG16(CRC32_BASE + OFS_CRC32DIRBW1) = dataIn;
}
}
void CRC32_set32BitDataReversed(uint32_t dataIn)
{
HWREG16(CRC32_BASE + OFS_CRC32DIRBW1) = dataIn & 0xFFFF;
HWREG16(CRC32_BASE + OFS_CRC32DIRBW0) = (uint16_t) ((dataIn & 0xFFFF0000)
>> 16);
}
uint32_t CRC32_getResult(uint8_t crcMode)
{
if(CRC16_MODE == crcMode)
{
return (HWREG16(CRC32_BASE + OFS_CRC16INIRESW0));
}
else
{
uint32_t result = 0;
result = HWREG16(CRC32_BASE + OFS_CRC32INIRESW1);
result = (result << 16);
result |= HWREG16(CRC32_BASE + OFS_CRC32INIRESW0);
return (result);
}
}
uint32_t CRC32_getResultReversed(uint8_t crcMode)
{
if(CRC16_MODE == crcMode)
{
return (HWREG16(CRC32_BASE + OFS_CRC16RESRW0));
}
else
{
uint32_t result = 0;
result = HWREG16(CRC32_BASE + OFS_CRC32RESRW0);
result = (result << 16);
result |= HWREG16(CRC32_BASE + OFS_CRC32RESRW1);
return (result);
}
}
#endif
//*****************************************************************************
//
//! Close the doxygen group for crc32_api
//! @}
//
//*****************************************************************************
|
