1 /**
2 ******************************************************************************
3 * @file    HAL_crc.c
4 * @author  AE Team
5 * @version V1.0.0
6 * @date    28/7/2017
7 * @brief   This file provides all the CRC firmware functions.
8 ******************************************************************************
9 * @copy
10 *
11 * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
12 * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
13 * TIME. AS A RESULT, MindMotion SHALL NOT BE HELD LIABLE FOR ANY
14 * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
15 * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
16 * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
17 *
18 * <h2><center>&copy; COPYRIGHT 2017 MindMotion</center></h2>
19 */
20 
21 /* Includes ------------------------------------------------------------------*/
22 #include "HAL_crc.h"
23 
24 /** @addtogroup StdPeriph_Driver
25 * @{
26 */
27 
28 /** @defgroup CRC
29 * @brief CRC driver modules
30 * @{
31 */
32 
33 /** @defgroup CRC_Private_TypesDefinitions
34 * @{
35 */
36 
37 /**
38 * @}
39 */
40 
41 /** @defgroup CRC_Private_Defines
42 * @{
43 */
44 
45 /* CR register bit mask */
46 
47 #define CR_RESET_Set    ((uint32_t)0x00000001)
48 
49 /**
50 * @}
51 */
52 
53 /** @defgroup CRC_Private_Macros
54 * @{
55 */
56 
57 /**
58 * @}
59 */
60 
61 /** @defgroup CRC_Private_Variables
62 * @{
63 */
64 
65 /**
66 * @}
67 */
68 
69 /** @defgroup CRC_Private_FunctionPrototypes
70 * @{
71 */
72 
73 /**
74 * @}
75 */
76 
77 /** @defgroup CRC_Private_Functions
78 * @{
79 */
80 
81 /**
82 * @brief  Resets the CRC Data register (DR).
83 * @param  None
84 * @retval : None
85 */
CRC_ResetDR(void)86 void CRC_ResetDR(void)
87 {
88     /* Reset CRC generator */
89     CRC->CR = CR_RESET_Set;
90 }
91 
92 /**
93 * @brief  Computes the 32-bit CRC of a given data word(32-bit).
94 * @param Data: data word(32-bit) to compute its CRC
95 * @retval : 32-bit CRC
96 */
CRC_CalcCRC(uint32_t Data)97 uint32_t CRC_CalcCRC(uint32_t Data)
98 {
99     CRC->DR = Data;
100     CRC->DR = CRC_GetCRC();//gai
101     return (CRC->DR);
102 }
103 
104 /**
105 * @brief  Computes the 32-bit CRC of a given buffer of data word(32-bit).
106 * @param pBuffer: pointer to the buffer containing the data to be
107 *   computed
108 * @param BufferLength: length of the buffer to be computed
109 * @retval : 32-bit CRC
110 */
CRC_CalcBlockCRC(uint32_t pBuffer[],uint32_t BufferLength)111 uint32_t CRC_CalcBlockCRC(uint32_t pBuffer[], uint32_t BufferLength)
112 {
113     uint32_t index = 0;
114 
115     for(index = 0; index < BufferLength; index++)
116     {
117         CRC->DR = pBuffer[index];
118     }
119     return (CRC->DR);
120 }
121 
122 /**
123 * @brief  Returns the current CRC value.
124 * @param  None
125 * @retval : 32-bit CRC
126 */
CRC_GetCRC(void)127 uint32_t CRC_GetCRC(void)
128 {
129     return (CRC->DR);
130 }
131 
132 /**
133 * @brief  Stores a 8-bit data in the Independent Data(ID) register.
134 * @param IDValue: 8-bit value to be stored in the ID register
135 * @retval : None
136 */
CRC_SetIDRegister(uint8_t IDValue)137 void CRC_SetIDRegister(uint8_t IDValue)
138 {
139     CRC->IDR = IDValue;
140 }
141 
142 /**
143 * @brief  Returns the 8-bit data stored in the Independent Data(ID) register
144 * @param  None
145 * @retval : 8-bit value of the ID register
146 */
CRC_GetIDRegister(void)147 uint8_t CRC_GetIDRegister(void)
148 {
149     return (CRC->IDR);
150 }
151 
152 /**
153 * @}
154 */
155 
156 /**
157 * @}
158 */
159 
160 /**
161 * @}
162 */
163 
164 /*-------------------------(C) COPYRIGHT 2017 MindMotion ----------------------*/
165