117 lines
3.9 KiB
C
117 lines
3.9 KiB
C
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/**************************************************************************************************
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Filename: _hal_crc.c
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Revised: $Date: 2012-12-04 18:36:53 -0800 (Tue, 04 Dec 2012) $
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Revision: $Revision: 32433 $
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Description: This file defines the interface to the H/W CRC driver by LFSR.
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Copyright 2012 Texas Instruments Incorporated. All rights reserved.
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IMPORTANT: Your use of this Software is limited to those specific rights
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granted under the terms of a software license agreement between the user
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who downloaded the software, his/her employer (which must be your employer)
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and Texas Instruments Incorporated (the "License"). You may not use this
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Software unless you agree to abide by the terms of the License. The License
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limits your use, and you acknowledge, that the Software may not be modified,
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copied or distributed unless embedded on a Texas Instruments microcontroller
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or used solely and exclusively in conjunction with a Texas Instruments radio
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frequency transceiver, which is integrated into your product. Other than for
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the foregoing purpose, you may not use, reproduce, copy, prepare derivative
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works of, modify, distribute, perform, display or sell this Software and/or
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its documentation for any purpose.
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YOU FURTHER ACKNOWLEDGE AND AGREE THAT THE SOFTWARE AND DOCUMENTATION ARE
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PROVIDED <EFBFBD>AS IS<EFBFBD> WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED,
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INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY, TITLE,
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NON-INFRINGEMENT AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL
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TEXAS INSTRUMENTS OR ITS LICENSORS BE LIABLE OR OBLIGATED UNDER CONTRACT,
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NEGLIGENCE, STRICT LIABILITY, CONTRIBUTION, BREACH OF WARRANTY, OR OTHER
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LEGAL EQUITABLE THEORY ANY DIRECT OR INDIRECT DAMAGES OR EXPENSES
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INCLUDING BUT NOT LIMITED TO ANY INCIDENTAL, SPECIAL, INDIRECT, PUNITIVE
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OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, COST OF PROCUREMENT
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OF SUBSTITUTE GOODS, TECHNOLOGY, SERVICES, OR ANY CLAIMS BY THIRD PARTIES
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(INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), OR OTHER SIMILAR COSTS.
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Should you have any questions regarding your right to use this Software,
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contact Texas Instruments Incorporated at www.TI.com.
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**************************************************************************************************/
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/* ------------------------------------------------------------------------------------------------
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* Includes
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* ------------------------------------------------------------------------------------------------
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*/
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#include "hal_board.h"
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#include "hal_crc.h"
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#include "hal_types.h"
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/**************************************************************************************************
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* @fn HalCRCCalc
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*
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* @brief Calculate the H/W CRC result.
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*
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* input parameters
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*
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* None.
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*
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* output parameters
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*
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* None.
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*
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* @return The H/W CRC result.
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*/
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uint16 HalCRCCalc(void)
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{
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uint16 crc = RNDH;
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crc = (crc << 8) | RNDL;
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return crc;
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}
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/**************************************************************************************************
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* @fn HalCRCExec
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*
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* @brief Execute the H/W CRC calculation on the input byte.
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*
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* input parameters
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*
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* @param ch - The byte on which to execute the H/W CRC calculation.
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*
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* output parameters
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*
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* None.
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*
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* @return None.
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*/
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void HalCRCExec(uint8 ch)
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{
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RNDH = ch;
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}
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/**************************************************************************************************
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* @fn HalCRCInit
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*
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* @brief Initialize the H/W for a new CRC calculation.
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*
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* input parameters
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*
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* @param seed - The CRC seed.
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*
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* output parameters
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*
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* None.
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*
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* @return None.
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*/
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void HalCRCInit(uint16 seed)
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{
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ADCCON1 &= 0xF3; // CRC configuration of LRSR.
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RNDL = HI_UINT16(seed);
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RNDL = LO_UINT16(seed);
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}
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/**************************************************************************************************
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*/
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