rt-thread/bsp/tm4c129x/libraries/driverlib/crc.h

//*****************************************************************************
//
// crc.h - Defines and Macros for CRC module.
//
// Copyright (c) 2012-2017 Texas Instruments Incorporated.  All rights reserved.
// Software License Agreement
// 
//   Redistribution and use in source and binary forms, with or without
//   modification, are permitted provided that the following conditions
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// 
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//   notice, this list of conditions and the following disclaimer.
// 
//   Redistributions in binary form must reproduce the above copyright
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//   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
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// 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
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// 
// This is part of revision 2.1.4.178 of the Tiva Peripheral Driver Library.
//
//*****************************************************************************

#ifndef __DRIVERLIB_CRC_H__
#define __DRIVERLIB_CRC_H__

//*****************************************************************************
//
// If building with a C++ compiler, make all of the definitions in this header
// have a C binding.
//
//*****************************************************************************
#ifdef __cplusplus
extern "C"
{
#endif

//*****************************************************************************
//
// The following defines are used in the ui32Config argument of the
// ECConfig function.
//
//*****************************************************************************
#define CRC_CFG_INIT_SEED       0x00000000  // Initialize with seed
#define CRC_CFG_INIT_0          0x00004000  // Initialize to all '0s'
#define CRC_CFG_INIT_1          0x00006000  // Initialize to all '1s'
#define CRC_CFG_SIZE_8BIT       0x00001000  // Input Data Size
#define CRC_CFG_SIZE_32BIT      0x00000000  // Input Data Size
#define CRC_CFG_RESINV          0x00000200  // Result Inverse Enable
#define CRC_CFG_OBR             0x00000100  // Output Reverse Enable
#define CRC_CFG_IBR             0x00000080  // Bit reverse enable
#define CRC_CFG_ENDIAN_SBHW     0x00000020  // Swap byte in half-word
#define CRC_CFG_ENDIAN_SHW      0x00000010  // Swap half-word
#define CRC_CFG_TYPE_P8005      0x00000000  // Polynomial 0x8005
#define CRC_CFG_TYPE_P1021      0x00000001  // Polynomial 0x1021
#define CRC_CFG_TYPE_P4C11DB7   0x00000002  // Polynomial 0x4C11DB7
#define CRC_CFG_TYPE_P1EDC6F41  0x00000003  // Polynomial 0x1EDC6F41
#define CRC_CFG_TYPE_TCPCHKSUM  0x00000008  // TCP checksum

//*****************************************************************************
//
// Function prototypes.
//
//*****************************************************************************
#if 0
extern void ECClockGatingReqest(uint32_t ui32Base, uint32_t ui32ECIP,
                                bool bGate);
#endif
extern void CRCConfigSet(uint32_t ui32Base, uint32_t ui32CRCConfig);
extern uint32_t CRCDataProcess(uint32_t ui32Base, uint32_t *pui32DataIn,
                               uint32_t ui32DataLength, bool bPPResult);
extern void CRCDataWrite(uint32_t ui32Base, uint32_t ui32Data);
extern uint32_t CRCResultRead(uint32_t ui32Base, bool bPPResult);
extern void CRCSeedSet(uint32_t ui32Base, uint32_t ui32Seed);

//*****************************************************************************
//
// Mark the end of the C bindings section for C++ compilers.
//
//*****************************************************************************
#ifdef __cplusplus
}
#endif

#endif // __DRIVERLIB_CRC_H__