1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
|
/*
* Copyright (C) 2017 C-SKY Microsystems Co., Ltd. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/******************************************************************************
* @file ck_crc.c
* @brief CSI Source File for CRC Driver
* @version V1.0
* @date 02. June 2017
******************************************************************************/
#include <stdio.h>
#include "drv_crc.h"
#include "ck_crc.h"
#define ERR_CRC(errno) (CSI_DRV_ERRNO_CRC_BASE | errno)
#define CRC_NULL_PARAM_CHK(para) \
do { \
if (para == NULL) { \
return ERR_CRC(EDRV_PARAMETER); \
} \
} while (0)
typedef struct {
uint32_t base;
crc_event_cb_t cb;
crc_status_t status;
} ck_crc_priv_t;
static ck_crc_priv_t crc_handle[CONFIG_CRC_NUM];
/* Driver Capabilities */
static const crc_capabilities_t driver_capabilities = {
.ROHC = 1, /* ROHC mode */
.MAXIM = 1, /* MAXIM mode */
.X25 = 1, /* X25 mode */
.CCITT = 1, /* CCITT mode */
.USB = 1, /* USB mode */
.IBM = 1, /* IBM mode */
.MODBUS = 1 /* MODBUS mode */
};
//
// Functions
//
static ck_crc_reg_t *crc_reg = NULL;
static int32_t crc_set_mode(crc_mode_e mode, crc_standard_crc_e standard)
{
if (mode == CRC_MODE_CRC16) {
switch (standard) {
case CRC_STANDARD_CRC_MODBUS:
crc_reg->CRC_SEL = 0x0;
crc_reg->CRC_INIT = 0xffff;
break;
case CRC_STANDARD_CRC_IBM:
crc_reg->CRC_SEL = 0x0;
crc_reg->CRC_INIT = 0x0;
break;
case CRC_STANDARD_CRC_MAXIM:
crc_reg->CRC_SEL = 0x4;
crc_reg->CRC_INIT = 0x0;
break;
case CRC_STANDARD_CRC_USB:
crc_reg->CRC_SEL = 0x4;
crc_reg->CRC_INIT = 0xffff;
break;
case CRC_STANDARD_CRC_CCITT:
crc_reg->CRC_SEL = 0x1;
crc_reg->CRC_INIT = 0x0;
break;
case CRC_STANDARD_CRC_X25:
crc_reg->CRC_SEL = 0x5;
crc_reg->CRC_INIT = 0xffff;
break;
default:
return ERR_CRC(EDRV_PARAMETER);
}
} else if (mode == CRC_MODE_CRC8) {
switch (standard) {
case CRC_STANDARD_CRC_MAXIM:
crc_reg->CRC_SEL = 0x2;
crc_reg->CRC_INIT = 0x0;
break;
case CRC_STANDARD_CRC_ROHC:
crc_reg->CRC_SEL = 0x3;
crc_reg->CRC_INIT = 0xff;
break;
default:
return ERR_CRC(EDRV_PARAMETER);
}
} else {
return ERR_CRC(EDRV_PARAMETER);
}
return 0;
}
static int32_t crc_set_data(uint32_t data)
{
crc_reg->CRC_DATA = data;
return 0;
}
static int32_t crc_get_data(uint32_t *data)
{
*data = crc_reg->CRC_DATA;
return 0;
}
int32_t __attribute__((weak)) target_get_crc_count(void)
{
return 0;
}
int32_t __attribute__((weak)) target_get_crc(int32_t idx, uint32_t *base)
{
return NULL;
}
/**
\brief get crc handle count.
\return crc handle count
*/
int32_t csi_crc_get_instance_count(void)
{
return target_get_crc_count();
}
/**
\brief Initialize CRC Interface. 1. Initializes the resources needed for the CRC interface 2.registers event callback function
\param[in] idx must not exceed return value of csi_crc_get_handle_count()
\param[in] cb_event Pointer to \ref crc_event_cb_t
\return return crc handle if success
*/
crc_handle_t csi_crc_initialize(int32_t idx, crc_event_cb_t cb_event)
{
if (idx < 0 || idx >= CONFIG_CRC_NUM) {
return NULL;
}
/* obtain the crc information */
uint32_t base = 0u;
int32_t real_idx = target_get_crc(idx, &base);
if (real_idx != idx) {
return NULL;
}
ck_crc_priv_t *crc_priv = &crc_handle[idx];
crc_reg = (ck_crc_reg_t *)(crc_priv->base);
crc_priv->base = base;
crc_priv->cb = cb_event;
crc_priv->status.busy = 0;
return (crc_handle_t)crc_priv;
}
/**
\brief De-initialize CRC Interface. stops operation and releases the software resources used by the interface
\param[in] handle crc handle to operate.
\return error code
*/
int32_t csi_crc_uninitialize(crc_handle_t handle)
{
CRC_NULL_PARAM_CHK(handle);
ck_crc_priv_t *crc_priv = handle;
crc_priv->cb = NULL;
return 0;
}
/**
\brief Get driver capabilities.
\param[in] handle crc handle to operate.
\return \ref crc_capabilities_t
*/
crc_capabilities_t csi_crc_get_capabilities(crc_handle_t handle)
{
return driver_capabilities;
}
/**
\brief config crc mode.
\param[in] handle crc handle to operate.
\param[in] mode \ref crc_mode_e
\param[in] standard \ref crc_standard_crc_e
\return error code
*/
int32_t csi_crc_config(crc_handle_t handle, crc_mode_e mode, crc_standard_crc_e standard)
{
CRC_NULL_PARAM_CHK(handle);
/* set the crc mode */
uint32_t ret = crc_set_mode(mode, standard);
return ret;
}
/**
\brief calculate crc.
\param[in] handle crc handle to operate.
\param[in] in Pointer to the input data
\param[out] out Pointer to the result.
\param[in] len intpu data len.
\return error code
*/
int32_t csi_crc_calculate(crc_handle_t handle, const void *in, void *out, uint32_t len)
{
CRC_NULL_PARAM_CHK(handle);
CRC_NULL_PARAM_CHK(in);
CRC_NULL_PARAM_CHK(out);
if (len <= 0) {
return ERR_CRC(EDRV_PARAMETER);
}
ck_crc_priv_t *crc_priv = handle;
crc_reg = (ck_crc_reg_t *)(crc_priv->base);
crc_priv->status.busy = 1;
/* put the data int the register */
uint8_t cur;
uint8_t *p = (uint8_t *)in;
for (cur=0; cur<len - 3; cur += 4, p+=4) {
crc_set_data(p[0]
| (p[1] << 8)
| (p[2] << 16)
| (p[3] << 24));
}
uint32_t data = 0;
uint8_t i;
if (cur < len) {
for (i=0; i<len-cur; i++) {
data |= (p[cur + i] << (i*8));
}
crc_set_data(data);
}
crc_get_data((uint32_t *)out);
crc_priv->status.busy = 0;
return 0;
}
/**
\brief Get CRC status.
\param[in] handle crc handle to operate.
\return CRC status \ref crc_status_t
*/
crc_status_t csi_crc_get_status(crc_handle_t handle)
{
ck_crc_priv_t *crc_priv = handle;
return crc_priv->status;
}
|
