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
|
/*
* 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 "cc-bitbang.h"
/*
* Manual bit-banging to debug the low level protocol
*/
static void
get_bit(char *line, int i, char on, uint8_t bit, uint8_t *bits, uint8_t *masks)
{
if (line[i] == on) {
*bits |= bit;
*masks |= bit;
return;
}
if (line[i] == '.') {
*masks |= bit;
return;
}
if (line[i] == '-') {
return;
}
fprintf(stderr, "bad line %s\n", line);
exit (1);
}
void
ccdbg_manual(struct ccdbg *dbg, FILE *input)
{
char line[80];
uint8_t set, mask;
if (dbg->bb == NULL) {
fprintf(stderr, "Must use bitbang API for manual mode\n");
return;
}
while (fgets(line, sizeof line, input)) {
if (line[0] == '#' || line[0] == '\n') {
printf ("%s", line);
continue;
}
set = 0;
mask = 0;
get_bit(line, 0, 'C', CC_CLOCK, &set, &mask);
get_bit(line, 2, 'D', CC_DATA, &set, &mask);
get_bit(line, 4, 'R', CC_RESET_N, &set, &mask);
if (mask != (CC_CLOCK|CC_DATA|CC_RESET_N)) {
uint8_t read;
cc_bitbang_read(dbg->bb, &read);
cc_bitbang_sync(dbg->bb);
cc_bitbang_print("\t%c %c %c", CC_CLOCK|CC_DATA|CC_RESET_N, read);
if ((set & CC_CLOCK) == 0)
printf ("\t%d", (read&CC_DATA) ? 1 : 0);
printf ("\n");
}
cc_bitbang_send(dbg->bb, mask, set);
cc_bitbang_sync(dbg->bb);
}
}
|
