111 lines
3.8 KiB
C
111 lines
3.8 KiB
C
/** @addtogroup crc_defines
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@author @htmlonly © @endhtmlonly 2016 Cem Basoglu <cem.basoglu@web.de>
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*/
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/*
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* This file is part of the libopencm3 project.
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*
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* Copyright (C) 2016 Cem Basoglu <cem.basoglu@web.de>
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*
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* This library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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/* THIS FILE SHOULD NOT BE INCLUDED DIRECTLY, BUT ONLY VIA CRC.H
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The order of header inclusion is important. crc.h includes the device
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specific memorymap.h header before including this header file.*/
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/** @cond */
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#ifdef LIBOPENCM3_CRC_H
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/** @endcond */
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#ifndef LIBOPENCM3_CRC_V2_H
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#define LIBOPENCM3_CRC_V2_H
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/**@{*/
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#include <libopencm3/stm32/common/crc_common_all.h>
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/*****************************************************************************/
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/* Module definitions */
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/*****************************************************************************/
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/*****************************************************************************/
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/* Register definitions */
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/*****************************************************************************/
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/* Data register (CRC_DR) */
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#define CRC_DR8 MMIO8(CRC_BASE + 0x00)
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#define CRC_DR16 MMIO16(CRC_BASE + 0x00)
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/* Initial CRC Value */
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#define CRC_INIT MMIO32(CRC_BASE + 0x10)
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/* CRC Polynomial */
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#define CRC_POL MMIO32(CRC_BASE + 0x14)
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/*****************************************************************************/
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/* Register values */
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/*****************************************************************************/
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#define CRC_CR_REV_OUT (1 << 7)
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#define CRC_CR_REV_IN_SHIFT 5
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#define CRC_CR_REV_IN (3 << CRC_CR_REV_IN_SHIFT)
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#define CRC_CR_REV_IN_NONE (0 << CRC_CR_REV_IN_SHIFT)
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#define CRC_CR_REV_IN_BYTE (1 << CRC_CR_REV_IN_SHIFT)
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#define CRC_CR_REV_IN_HALF (2 << CRC_CR_REV_IN_SHIFT)
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#define CRC_CR_REV_IN_WORD (3 << CRC_CR_REV_IN_SHIFT)
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#define CRC_CR_POLYSIZE_SHIFT 3
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#define CRC_CR_POLYSIZE (3 << CRC_CR_POLYSIZE_SHIFT)
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#define CRC_CR_POLYSIZE_32 (0 << CRC_CR_POLYSIZE_SHIFT)
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#define CRC_CR_POLYSIZE_16 (1 << CRC_CR_POLYSIZE_SHIFT)
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#define CRC_CR_POLYSIZE_8 (2 << CRC_CR_POLYSIZE_SHIFT)
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#define CRC_CR_POLYSIZE_7 (3 << CRC_CR_POLYSIZE_SHIFT)
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/* Default polynomial */
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#define CRC_POL_DEFAULT 0x04C11DB7
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/*****************************************************************************/
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/* API definitions */
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/*****************************************************************************/
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/*****************************************************************************/
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/* API Functions */
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/*****************************************************************************/
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BEGIN_DECLS
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void crc_reverse_output_enable(void);
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void crc_reverse_output_disable(void);
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void crc_set_reverse_input(uint32_t reverse_in);
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void crc_set_polysize(uint32_t polysize);
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void crc_set_polynomial(uint32_t polynomial);
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void crc_set_initial(uint32_t initial);
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END_DECLS
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/**@}*/
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#endif
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/** @cond */
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#else
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#warning "crc_v2.h should not be included explicitly, only via crc.h"
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#endif
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/** @endcond */
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