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
|
/*
* Copyright © 2008 Keith Packard <keithp@keithp.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include "ccdbg.h"
#include <time.h>
#ifdef CP_USB_ASYNC
#include "cp-usb-async.h"
#else
#include "cp-usb.h"
#endif
static uint32_t cc_clock_us = CC_CLOCK_US;
static uint32_t cc_reset_us = CC_RESET_US;
void
ccdbg_set_clock(uint32_t us)
{
cc_clock_us = us;
}
void
ccdbg_half_clock(struct ccdbg *dbg)
{
struct timespec req, rem;
req.tv_sec = (cc_clock_us / 2) / 1000000;
req.tv_nsec = ((cc_clock_us / 2) % 1000000) * 1000;
nanosleep(&req, &rem);
}
void
ccdbg_wait_reset(struct ccdbg *dbg)
{
struct timespec req, rem;
ccdbg_sync_io(dbg);
req.tv_sec = (cc_reset_us) / 1000000;
req.tv_nsec = ((cc_reset_us) % 1000000) * 1000;
nanosleep(&req, &rem);
}
struct ccdbg *
ccdbg_open(void)
{
struct ccdbg *dbg;
dbg = calloc(sizeof (struct ccdbg), 1);
if (!dbg) {
perror("calloc");
return NULL;
}
#ifdef CP_USB_ASYNC
dbg->cp_async = cp_usb_async_open();
if (!dbg->cp_async) {
free (dbg);
return NULL;
}
#else
dbg->cp = cp_usb_open ();
if (!dbg->cp) {
free (dbg);
return NULL;
}
#endif
return dbg;
}
void
ccdbg_close(struct ccdbg *dbg)
{
#ifdef CP_USB_ASYNC
cp_usb_async_close(dbg->cp_async);
#else
cp_usb_close(dbg->cp);
#endif
free (dbg);
}
int
ccdbg_write(struct ccdbg *dbg, uint8_t mask, uint8_t value)
{
#ifdef CP_USB_ASYNC
cp_usb_async_write(dbg->cp_async, mask, value);
#else
cp_usb_write(dbg->cp, mask, value);
#endif
return 0;
}
void
ccdbg_read(struct ccdbg *dbg, uint8_t *valuep)
{
#ifdef CP_USB_ASYNC
cp_usb_async_read(dbg->cp_async, valuep);
#else
*valuep = cp_usb_read(dbg->cp);
#endif
}
void
ccdbg_sync_io(struct ccdbg *dbg)
{
#ifdef CP_USB_ASYNC
cp_usb_async_sync(dbg->cp_async);
#endif
}
static char
is_bit(uint8_t get, uint8_t mask, char on, uint8_t bit)
{
if (mask&bit) {
if (get&bit)
return on;
else
return '.';
} else
return '-';
}
void
ccdbg_print(char *format, uint8_t mask, uint8_t set)
{
ccdbg_debug (CC_DEBUG_BITBANG, format,
is_bit(set, mask, 'C', CC_CLOCK),
is_bit(set, mask, 'D', CC_DATA),
is_bit(set, mask, 'R', CC_RESET_N));
}
void
ccdbg_send(struct ccdbg *dbg, uint8_t mask, uint8_t set)
{
ccdbg_write(dbg, mask, set);
ccdbg_print("%c %c %c\n", mask, set);
ccdbg_half_clock(dbg);
}
void
ccdbg_send_bit(struct ccdbg *dbg, uint8_t bit)
{
if (bit) bit = CC_DATA;
ccdbg_send(dbg, CC_CLOCK|CC_DATA|CC_RESET_N, CC_CLOCK|bit|CC_RESET_N);
ccdbg_send(dbg, CC_CLOCK|CC_DATA|CC_RESET_N, bit|CC_RESET_N);
}
void
ccdbg_send_byte(struct ccdbg *dbg, uint8_t byte)
{
int bit;
ccdbg_debug(CC_DEBUG_BITBANG, "#\n# Send Byte 0x%02x\n#\n", byte);
for (bit = 7; bit >= 0; bit--) {
ccdbg_send_bit(dbg, (byte >> bit) & 1);
if (bit == 3)
ccdbg_debug(CC_DEBUG_BITBANG, "\n");
}
ccdbg_sync_io(dbg);
}
void
ccdbg_send_bytes(struct ccdbg *dbg, uint8_t *bytes, int nbytes)
{
while (nbytes--)
ccdbg_send_byte(dbg, *bytes++);
}
void
ccdbg_recv_bit(struct ccdbg *dbg, int first, uint8_t *bit)
{
uint8_t mask = first ? CC_DATA : 0;
ccdbg_send(dbg, CC_CLOCK|mask|CC_RESET_N, CC_CLOCK|CC_DATA|CC_RESET_N);
ccdbg_read(dbg, bit);
ccdbg_send(dbg, CC_CLOCK| CC_RESET_N, CC_RESET_N);
}
void
ccdbg_recv_byte(struct ccdbg *dbg, int first, uint8_t *bytep)
{
uint8_t byte = 0;
uint8_t bits[8];
int bit;
ccdbg_debug(CC_DEBUG_BITBANG, "#\n# Recv byte\n#\n");
for (bit = 0; bit < 8; bit++) {
ccdbg_recv_bit(dbg, first, &bits[bit]);
first = 0;
}
ccdbg_sync_io(dbg);
for (bit = 0; bit < 8; bit++) {
byte = byte << 1;
byte |= (bits[bit] & CC_DATA) ? 1 : 0;
ccdbg_print("#\t%c %c %c\n", CC_DATA, bits[bit]);
if (bit == 3)
ccdbg_debug(CC_DEBUG_BITBANG, "\n");
}
ccdbg_debug(CC_DEBUG_BITBANG, "#\n# Recv 0x%02x\n#\n", byte);
*bytep = byte;
}
void
ccdbg_recv_bytes(struct ccdbg *dbg, uint8_t *bytes, int nbytes)
{
int i;
int first = 1;
for (i = 0; i < nbytes; i++) {
ccdbg_recv_byte(dbg, first, &bytes[i]);
first = 0;
}
}
void
ccdbg_cmd_write(struct ccdbg *dbg, uint8_t cmd, uint8_t *data, int len)
{
int i;
ccdbg_send_byte(dbg, cmd);
for (i = 0; i < len; i++)
ccdbg_send_byte(dbg, data[i]);
}
uint8_t
ccdbg_cmd_write_read8(struct ccdbg *dbg, uint8_t cmd, uint8_t *data, int len)
{
uint8_t byte[1];
ccdbg_cmd_write(dbg, cmd, data, len);
ccdbg_recv_bytes(dbg, byte, 1);
return byte[0];
}
uint16_t
ccdbg_cmd_write_read16(struct ccdbg *dbg, uint8_t cmd, uint8_t *data, int len)
{
uint8_t byte[2];
ccdbg_cmd_write(dbg, cmd, data, len);
ccdbg_recv_bytes(dbg, byte, 2);
return (byte[0] << 8) | byte[1];
}
|
