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
|
/*
* Copyright (C) 2016 FAUmachine Team <info@faumachine.org>.
* This program is free software. You can redistribute it and/or modify it
* under the terms of the GNU General Public License, either version 2 of
* the License, or (at your option) any later version. See COPYING.
*/
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#define INCLUDE
#include "arch_i2c_slave.c"
#undef INCLUDE
#include "glue.h"
#include "chip_st_lis302dl.h"
#define CHIP_(x) chip_st_lis302dl_ ## x
struct cpssp {
unsigned int state_power;
unsigned int device_addr;
struct sig_std_logic *port_sda;
int is_address_phase;
uint8_t counter;
#define STATE
#define NAME i2c_slave
#define NAME_(x) i2c_slave_ ## x
#include "arch_i2c_slave.c"
#undef NAME_
#undef NAME
#undef STATE
};
static uint8_t
CHIP_(reg_read)(struct cpssp *cpssp, uint8_t addr)
{
return 0; /* FIXME */
}
static void
CHIP_(reg_write)(struct cpssp *cpssp, uint8_t addr, uint8_t val)
{
/* FIXME */
}
static int
CHIP_(ack_addr)(struct cpssp *cpssp, unsigned char addr)
{
if ((addr & 0xfe) == (0x38 | (cpssp->device_addr << 1))) {
/* Selected */
return 1;
}
return 0;
}
static void
CHIP_(read_byte)(struct cpssp *cpssp, unsigned char *valp)
{
if (cpssp->is_address_phase) {
*valp = cpssp->counter;
cpssp->is_address_phase = 0;
} else {
assert(cpssp->counter < 256);
*valp = CHIP_(reg_read)(cpssp, cpssp->counter);
cpssp->counter = (cpssp->counter + 1) & (256 - 1);
assert(cpssp->counter < 256);
}
}
static int
CHIP_(write_byte)(struct cpssp *cpssp, unsigned char val)
{
if (cpssp->is_address_phase) {
cpssp->counter = val;
assert(cpssp->counter < 256);
cpssp->is_address_phase = 0;
} else {
assert(cpssp->counter < 256);
CHIP_(reg_write)(cpssp, cpssp->counter, val);
cpssp->counter = (cpssp->counter + 1) & (256 - 1);
assert(cpssp->counter < 256);
}
return 0;
}
static void
CHIP_(stop_transaction)(struct cpssp *cpssp)
{
cpssp->is_address_phase = 1;
}
static int
i2c_slave_ack_addr(struct cpssp *cpssp, uint8_t val)
{
return CHIP_(ack_addr)(cpssp, val);
}
static void
i2c_slave_read_byte(struct cpssp *cpssp, uint8_t *valp)
{
CHIP_(read_byte)(cpssp, valp);
}
static void
i2c_slave_write_byte(struct cpssp *cpssp, uint8_t val)
{
CHIP_(write_byte)(cpssp, val);
}
static void
i2c_slave_stop_transaction(struct cpssp *cpssp)
{
CHIP_(stop_transaction)(cpssp);
}
static void
i2c_slave_sda_out(struct cpssp *cpssp, unsigned int val)
{
switch (val) {
case SIG_STD_LOGIC_Z: val = 1; break;
case SIG_STD_LOGIC_1: val = 1; break;
case SIG_STD_LOGIC_0: val = 0; break;
default: assert(0);
}
sig_std_logic_set(cpssp->port_sda, cpssp, val);
}
#define BEHAVIOR
#define NAME i2c_slave
#define NAME_(x) i2c_slave_ ## x
#include "arch_i2c_slave.c"
#undef NAME_
#undef NAME
#undef BEHAVIOR
static void
CHIP_(scl_in_set)(void *_cpssp, unsigned int val)
{
struct cpssp *cpssp = _cpssp;
i2c_slave_scl_in(cpssp, val);
}
static void
CHIP_(sda_in_set)(void *_cpssp, unsigned int val)
{
struct cpssp *cpssp = _cpssp;
i2c_slave_sda_in(cpssp, val);
}
static void
CHIP_(sdo_in_set)(void *_cpssp, unsigned int val)
{
struct cpssp *cpssp = _cpssp;
cpssp->device_addr = val;
}
static void
CHIP_(vdd_in_set)(void *_cpssp, unsigned int val)
{
struct cpssp *cpssp = _cpssp;
cpssp->state_power = val;
if (val) {
/* Power-on reset. */
cpssp->is_address_phase = 1;
}
}
void *
CHIP_(create)(
const char *name,
struct sig_manage *manage,
struct sig_std_logic *port_gnd0,
struct sig_std_logic *port_gnd1,
struct sig_std_logic *port_gnd2,
struct sig_std_logic *port_gnd3,
struct sig_std_logic *port_R1,
struct sig_std_logic *port_vdd_io,
struct sig_std_logic *port_vdd,
struct sig_std_logic *port_R0,
struct sig_std_logic *port_sda,
struct sig_std_logic *port_scl,
struct sig_std_logic *port_int2,
struct sig_std_logic *port_int1,
struct sig_std_logic *port_cs,
struct sig_std_logic *port_sdo
)
{
static const struct sig_std_logic_funcs vdd_funcs = {
.boolean_or_set = CHIP_(vdd_in_set),
};
static const struct sig_std_logic_funcs scl_funcs = {
.std_logic_set = CHIP_(scl_in_set),
};
static const struct sig_std_logic_funcs sda_funcs = {
.std_logic_set = CHIP_(sda_in_set),
};
static const struct sig_std_logic_funcs sdo_funcs = {
.boolean_or_set = CHIP_(sdo_in_set),
};
struct cpssp *cpssp;
cpssp = malloc(sizeof(*cpssp));
assert(cpssp);
cpssp->device_addr = 0;
/* FIXME */
i2c_slave_create(cpssp);
cpssp->state_power = 0;
sig_std_logic_connect_in(port_vdd, cpssp, &vdd_funcs);
sig_std_logic_connect_in(port_scl, cpssp, &scl_funcs);
sig_std_logic_connect_in(port_sda, cpssp, &sda_funcs);
sig_std_logic_connect_in(port_sdo, cpssp, &sdo_funcs);
return cpssp;
}
void
CHIP_(destroy)(void *_cpssp)
{
struct cpssp *cpssp = _cpssp;
/* FIXME */
i2c_slave_destroy(cpssp);
free(cpssp);
}
void
CHIP_(suspend)(void *_cpssp, FILE *fp)
{
struct cpssp *cpssp = _cpssp;
generic_suspend(cpssp, sizeof(*cpssp), fp);
}
void
CHIP_(resume)(void *_cpssp, FILE *fp)
{
struct cpssp *cpssp = _cpssp;
generic_resume(cpssp, sizeof(*cpssp), fp);
}
|
