120 lines
3.9 KiB
C
120 lines
3.9 KiB
C
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//###########################################################################
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//
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// FILE: gcrc.c
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//
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// TITLE: Driver for the GCRC module.
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//
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//###########################################################################
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// $TI Release: F2838x Support Library v3.04.00.00 $
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// $Release Date: Fri Feb 12 19:08:49 IST 2021 $
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// $Copyright:
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// Copyright (C) 2021 Texas Instruments Incorporated - http://www.ti.com/
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions
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// are met:
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//
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// Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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//
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// Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the
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// distribution.
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//
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// Neither the name of Texas Instruments Incorporated nor the names of
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// its contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// $
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//###########################################################################
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#include "gcrc.h"
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//*****************************************************************************
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//
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// GCRC_setFixedPolynomialDataPath()
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//
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//*****************************************************************************
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void
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GCRC_setFixedPolynomialDataPath(uint32_t base)
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{
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//
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// Check the arguments
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//
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ASSERT(GCRC_isBaseValid(base));
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//
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// Set the polynomial size, Endianness, dataType and Bitreverse fields
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//
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HWREG(base + GCRC_O_CRCCTRL) = ((uint32_t)GCRC_FIXEDPATH_POLYSIZE <<
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GCRC_CRCCTRL_POLYSIZE_S) |
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GCRC_FIXEDPATH_ENDIANNESS |
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GCRC_FIXEDPATH_DATATYPE |
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GCRC_FIXEDPATH_BITREVERSE;
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//
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// Set the 32-bit polynomial
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//
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HWREG(base + GCRC_O_CRCPOLY) = GCRC_FIXEDPATH_POLY;
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//
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// Disable data masking
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//
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HWREG(base + GCRC_O_CRCDATAMASK) = GCRC_FIXEDPATH_DATAMASK;
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}
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//*****************************************************************************
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//
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// GCRC_writeData()
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//
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//*****************************************************************************
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void
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GCRC_writeData(uint32_t base, uint32_t data, uint32_t dataSize)
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{
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//
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// Check the arguments
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//
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ASSERT(GCRC_isBaseValid(base));
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ASSERT((dataSize == GCRC_DATATYPE_8BIT) ||
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(dataSize == GCRC_DATATYPE_16BIT) ||
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(dataSize == GCRC_DATATYPE_32BIT));
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if(dataSize == GCRC_DATATYPE_8BIT)
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{
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//
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// Perform a 8-bit write
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//
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HWREGB(base + GCRC_O_CRCDATAIN) = (uint8_t)data;
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}
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else if(dataSize == GCRC_DATATYPE_16BIT)
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{
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//
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// Perform a 16-bit write
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//
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HWREGH(base + GCRC_O_CRCDATAIN) = (uint16_t)data;
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}
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else
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{
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//
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// Perform a 32-bit write
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//
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HWREG(base + GCRC_O_CRCDATAIN) = data;
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}
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}
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