1 /*!
2 \file gd32e50x_crc.c
3 \brief CRC driver
4
5 \version 2020-03-10, V1.0.0, firmware for GD32E50x
6 \version 2020-08-26, V1.1.0, firmware for GD32E50x
7 \version 2021-03-23, V1.2.0, firmware for GD32E50x
8 */
9
10 /*
11 Copyright (c) 2021, GigaDevice Semiconductor Inc.
12
13 Redistribution and use in source and binary forms, with or without modification,
14 are permitted provided that the following conditions are met:
15
16 1. Redistributions of source code must retain the above copyright notice, this
17 list of conditions and the following disclaimer.
18 2. Redistributions in binary form must reproduce the above copyright notice,
19 this list of conditions and the following disclaimer in the documentation
20 and/or other materials provided with the distribution.
21 3. Neither the name of the copyright holder nor the names of its contributors
22 may be used to endorse or promote products derived from this software without
23 specific prior written permission.
24
25 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
26 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
27 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
28 IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
29 INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
30 NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
31 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
32 WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
33 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
34 OF SUCH DAMAGE.
35 */
36
37 #include "gd32e50x_crc.h"
38
39 /*!
40 \brief deinitialize CRC calculation unit
41 \param[in] none
42 \param[out] none
43 \retval none
44 */
crc_deinit(void)45 void crc_deinit(void)
46 {
47 CRC_IDATA = (uint32_t)0xFFFFFFFFU;
48 CRC_DATA = (uint32_t)0xFFFFFFFFU;
49 CRC_FDATA = (uint32_t)0x00000000U;
50 CRC_POLY = (uint32_t)0x04C11DB7U;
51 CRC_CTL = CRC_CTL_RST;
52 }
53
54 /*!
55 \brief reset data register to the value of initializaiton data register
56 \param[in] none
57 \param[out] none
58 \retval none
59 */
crc_data_register_reset(void)60 void crc_data_register_reset(void)
61 {
62 CRC_CTL |= (uint32_t)CRC_CTL_RST;
63 }
64
65 /*!
66 \brief enable the reverse operation of output data
67 \param[in] none
68 \param[out] none
69 \retval none
70 */
crc_reverse_output_data_enable(void)71 void crc_reverse_output_data_enable(void)
72 {
73 CRC_CTL &= (uint32_t)(~ CRC_CTL_REV_O);
74 CRC_CTL |= (uint32_t)CRC_CTL_REV_O;
75 }
76
77 /*!
78 \brief disable the reverse operation of output data
79 \param[in] none
80 \param[out] none
81 \retval none
82 */
crc_reverse_output_data_disable(void)83 void crc_reverse_output_data_disable(void)
84 {
85 CRC_CTL &= (uint32_t)(~ CRC_CTL_REV_O);
86 }
87
88 /*!
89 \brief configure the CRC input data function
90 \param[in] data_reverse: specify input data reverse function
91 only one parameter can be selected which is shown as below:
92 \arg CRC_INPUT_DATA_NOT: input data is not reversed
93 \arg CRC_INPUT_DATA_BYTE: input data is reversed on 8 bits
94 \arg CRC_INPUT_DATA_HALFWORD: input data is reversed on 16 bits
95 \arg CRC_INPUT_DATA_WORD: input data is reversed on 32 bits
96 \param[out] none
97 \retval none
98 */
crc_input_data_reverse_config(uint32_t data_reverse)99 void crc_input_data_reverse_config(uint32_t data_reverse)
100 {
101 CRC_CTL &= (uint32_t)(~CRC_CTL_REV_I);
102 CRC_CTL |= (uint32_t)data_reverse;
103 }
104
105 /*!
106 \brief read the data register
107 \param[in] none
108 \param[out] none
109 \retval 32-bit value of the data register
110 */
crc_data_register_read(void)111 uint32_t crc_data_register_read(void)
112 {
113 uint32_t data;
114 data = CRC_DATA;
115 return (data);
116 }
117
118 /*!
119 \brief read the free data register
120 \param[in] none
121 \param[out] none
122 \retval 8-bit value of the free data register
123 */
crc_free_data_register_read(void)124 uint8_t crc_free_data_register_read(void)
125 {
126 uint8_t fdata;
127 fdata = (uint8_t)CRC_FDATA;
128 return (fdata);
129 }
130
131 /*!
132 \brief write the free data register
133 \param[in] free_data: specify 8-bit data
134 \param[out] none
135 \retval none
136 */
crc_free_data_register_write(uint8_t free_data)137 void crc_free_data_register_write(uint8_t free_data)
138 {
139 CRC_FDATA = (uint32_t)free_data;
140 }
141
142 /*!
143 \brief write the initializaiton data register
144 \param[in] init_data: specify 32-bit data
145 \param[out] none
146 \retval none
147 */
crc_init_data_register_write(uint32_t init_data)148 void crc_init_data_register_write(uint32_t init_data)
149 {
150 CRC_IDATA = (uint32_t)init_data;
151 }
152
153 /*!
154 \brief configure the CRC size of polynomial function
155 \param[in] poly_size: size of polynomial
156 only one parameter can be selected which is shown as below:
157 \arg CRC_CTL_PS_32: 32-bit polynomial for CRC calculation
158 \arg CRC_CTL_PS_16: 16-bit polynomial for CRC calculation
159 \arg CRC_CTL_PS_8: 8-bit polynomial for CRC calculation
160 \arg CRC_CTL_PS_7: 7-bit polynomial for CRC calculation
161 \param[out] none
162 \retval none
163 */
crc_polynomial_size_set(uint32_t poly_size)164 void crc_polynomial_size_set(uint32_t poly_size)
165 {
166 CRC_CTL &= (uint32_t)(~(CRC_CTL_PS));
167 CRC_CTL |= (uint32_t)poly_size;
168 }
169
170 /*!
171 \brief configure the CRC polynomial value function
172 \param[in] poly: configurable polynomial value
173 \param[out] none
174 \retval none
175 */
crc_polynomial_set(uint32_t poly)176 void crc_polynomial_set(uint32_t poly)
177 {
178 CRC_POLY &= (uint32_t)(~CRC_POLY_POLY);
179 CRC_POLY = poly;
180 }
181
182 /*!
183 \brief CRC calculate single data
184 \param[in] sdata: specify input data data
185 \param[in] data_format: input data format
186 only one parameter can be selected which is shown as below:
187 \arg INPUT_FORMAT_WORD: input data in word format
188 \arg INPUT_FORMAT_HALFWORD: input data in half-word format
189 \arg INPUT_FORMAT_BYTE: input data in byte format
190 \param[out] none
191 \retval CRC calculate value
192 */
crc_single_data_calculate(uint32_t sdata,uint8_t data_format)193 uint32_t crc_single_data_calculate(uint32_t sdata, uint8_t data_format)
194 {
195 if(INPUT_FORMAT_WORD == data_format){
196 REG32(CRC) = sdata;
197 }else if(INPUT_FORMAT_HALFWORD == data_format){
198 REG16(CRC) = (uint16_t)sdata;
199 }else{
200 REG8(CRC) = (uint8_t)sdata;
201 }
202
203 return(CRC_DATA);
204 }
205
206 /*!
207 \brief CRC calculate a data array
208 \param[in] array: pointer to the input data array
209 \param[in] size: size of the array
210 \param[in] data_format: input data format
211 only one parameter can be selected which is shown as below:
212 \arg INPUT_FORMAT_WORD: input data in word format
213 \arg INPUT_FORMAT_HALFWORD: input data in half-word format
214 \arg INPUT_FORMAT_BYTE: input data in byte format
215 \param[out] none
216 \retval CRC calculate value
217 */
crc_block_data_calculate(void * array,uint32_t size,uint8_t data_format)218 uint32_t crc_block_data_calculate(void *array, uint32_t size, uint8_t data_format)
219 {
220 uint8_t *data8;
221 uint16_t *data16;
222 uint32_t *data32;
223 uint32_t index;
224
225 if(INPUT_FORMAT_WORD == data_format){
226 data32 = (uint32_t *)array;
227 for(index = 0U; index < size; index++){
228 REG32(CRC) = data32[index];
229 }
230 }else if(INPUT_FORMAT_HALFWORD == data_format){
231 data16 = (uint16_t *)array;
232 for(index = 0U; index < size; index++){
233 REG16(CRC) = data16[index];
234 }
235 }else{
236 data8 = (uint8_t *)array;
237 for(index = 0U; index < size; index++){
238 REG8(CRC) = data8[index];
239 }
240 }
241
242 return (CRC_DATA);
243 }
244
