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crc_17xx_40xx.c
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1 /*
2 * @brief LPC17xx/40xx Cyclic Redundancy Check (CRC) Engine driver
3 *
4 * @note
5 * Copyright(C) NXP Semiconductors, 2012
6 * All rights reserved.
7 *
8 * @par
9 * Software that is described herein is for illustrative purposes only
10 * which provides customers with programming information regarding the
11 * LPC products. This software is supplied "AS IS" without any warranties of
12 * any kind, and NXP Semiconductors and its licenser disclaim any and
13 * all warranties, express or implied, including all implied warranties of
14 * merchantability, fitness for a particular purpose and non-infringement of
15 * intellectual property rights. NXP Semiconductors assumes no responsibility
16 * or liability for the use of the software, conveys no license or rights under any
17 * patent, copyright, mask work right, or any other intellectual property rights in
18 * or to any products. NXP Semiconductors reserves the right to make changes
19 * in the software without notification. NXP Semiconductors also makes no
20 * representation or warranty that such application will be suitable for the
21 * specified use without further testing or modification.
22 *
23 * @par
24 * Permission to use, copy, modify, and distribute this software and its
25 * documentation is hereby granted, under NXP Semiconductors' and its
26 * licensor's relevant copyrights in the software, without fee, provided that it
27 * is used in conjunction with NXP Semiconductors microcontrollers. This
28 * copyright, permission, and disclaimer notice must appear in all copies of
29 * this code.
30 */
31 #include "chip.h"
32
33 #if !defined(CHIP_LPC175X_6X)
34
35 /*****************************************************************************
36 * Private types/enumerations/variables
37 ****************************************************************************/
38
39 /*****************************************************************************
40 * Public types/enumerations/variables
41 ****************************************************************************/
42
43 /*****************************************************************************
44 * Private functions
45 ****************************************************************************/
46
47 /*****************************************************************************
48 * Public functions
49 ****************************************************************************/
50
51 /* configure CRC engine and compute CCITT checksum from 8-bit data */
52 uint32_t Chip_CRC_CRC8(const uint8_t *data, uint32_t bytes)
53 {
54 Chip_CRC_UseDefaultConfig(CRC_POLY_CCITT);
55 return IP_CRC_CRC8(LPC_CRC, data, bytes);
56 }
57
58 /* Convenience function for computing a standard CRC16 checksum from 16-bit data block */
59 uint32_t Chip_CRC_CRC16(const uint16_t *data, uint32_t hwords)
60 {
61 Chip_CRC_UseDefaultConfig(CRC_POLY_CRC16);
62 return IP_CRC_CRC16(LPC_CRC, data, hwords);
63 }
64
65 /* Convenience function for computing a standard CRC32 checksum from 32-bit data block */
66 uint32_t Chip_CRC_CRC32(const uint32_t *data, uint32_t words)
67 {
68 Chip_CRC_UseDefaultConfig(CRC_POLY_CRC32);
69 return IP_CRC_CRC32(LPC_CRC, data, words);
70 }
71
72 #endif /* !defined(CHIP_LPC175X_6X) */