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
|
/* MSPDebug - debugging tool for MSP430 MCUs
* Copyright (C) 2009, 2010 Daniel Beer
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <ctype.h>
#include <stdlib.h>
#include "srec.h"
#include "util.h"
#include "output.h"
int srec_check(FILE *in)
{
char buf[128];
int i;
rewind(in);
if (!fgets(buf, sizeof(buf), in))
return 0;
if (buf[0] != 'S')
return 0;
for (i = 1; buf[i] && !isspace(buf[i]); i++)
if (!ishex(buf[i]))
return 0;
for (; buf[i]; i++)
if (!isspace(buf[i]))
return 0;
return 1;
}
int srec_extract(FILE *in, binfile_imgcb_t cb, void *user_data)
{
char buf[128];
int lno = 0;
rewind(in);
while (fgets(buf, sizeof(buf), in)) {
uint8_t bytes[128];
uint8_t cksum = 0;
int count = 0;
int i;
lno++;
if (buf[0] != 'S') {
printc_err("srec: garbage on line %d\n", lno);
return -1;
}
for (i = 2; ishex(buf[i]) && ishex(buf[i + 1]); i += 2) {
if (count >= sizeof(bytes)) {
printc_err("srec: too many bytes on "
"line %d\n", lno);
return -1;
}
bytes[count++] = (hexval(buf[i]) << 4) |
hexval(buf[i + 1]);
}
while (buf[i]) {
if (!isspace(buf[i])) {
printc_err("srec: trailing garbage on "
"line %d\n", lno);
return -1;
}
i++;
}
if (count < 2) {
printc_err("srec: too few bytes on line %d\n",
lno);
return -1;
}
if (bytes[0] + 1 != count) {
printc_err("srec: byte count mismatch on "
"line %d\n", lno);
return -1;
}
for (i = 0; i + 1 < count; i++)
cksum += bytes[i];
cksum = ~cksum;
if (cksum != bytes[count - 1]) {
printc_err("srec: checksum error on line %d "
"(calc = 0x%02x, read = 0x%02x)\n",
lno, cksum, bytes[count - 1]);
return -1;
}
if (buf[1] >= '1' && buf[1] <= '3') {
int addrbytes = buf[1] - '1' + 2;
address_t addr = 0;
struct binfile_chunk ch = {0};
for (i = 0; i < addrbytes; i++)
addr = (addr << 8) | bytes[i + 1];
if (count < addrbytes + 2) {
printc_err("srec: too few address bytes "
"on line %d\n", lno);
return -1;
}
ch.addr = addr;
ch.data = bytes + addrbytes + 1;
ch.len = count - 2 - addrbytes;
if (cb(user_data, &ch) < 0) {
printc_err("srec: error on line %d\n", lno);
return -1;
}
}
}
return 0;
}
|
