]>
Commit | Line | Data |
---|---|---|
1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2011 Uwe Hermann <uwe@hermann-uwe.de> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
20 | ||
21 | #include <stdlib.h> | |
22 | #include <fcntl.h> | |
23 | #include <unistd.h> | |
24 | #include <sys/stat.h> | |
25 | #include "libsigrok.h" | |
26 | #include "libsigrok-internal.h" | |
27 | ||
28 | #define LOG_PREFIX "input/chronovu-la8" | |
29 | ||
30 | #define DEFAULT_NUM_CHANNELS 8 | |
31 | #define DEFAULT_SAMPLERATE "100MHz" | |
32 | #define MAX_CHUNK_SIZE 4096 | |
33 | #define CHRONOVU_LA8_FILESIZE 8 * 1024 * 1024 + 5 | |
34 | ||
35 | struct context { | |
36 | gboolean started; | |
37 | uint64_t samplerate; | |
38 | }; | |
39 | ||
40 | static int format_match(GHashTable *metadata) | |
41 | { | |
42 | int size; | |
43 | ||
44 | size = GPOINTER_TO_INT(g_hash_table_lookup(metadata, | |
45 | GINT_TO_POINTER(SR_INPUT_META_FILESIZE))); | |
46 | if (size == CHRONOVU_LA8_FILESIZE) | |
47 | return TRUE; | |
48 | ||
49 | return FALSE; | |
50 | } | |
51 | ||
52 | static int init(struct sr_input *in, GHashTable *options) | |
53 | { | |
54 | struct sr_channel *ch; | |
55 | struct context *inc; | |
56 | uint64_t samplerate; | |
57 | int num_channels, i; | |
58 | const char *s; | |
59 | char name[16]; | |
60 | ||
61 | num_channels = g_variant_get_int32(g_hash_table_lookup(options, "numchannels")); | |
62 | if (num_channels < 1) { | |
63 | sr_err("Invalid value for numchannels: must be at least 1."); | |
64 | return SR_ERR_ARG; | |
65 | } | |
66 | ||
67 | s = g_variant_get_string(g_hash_table_lookup(options, "samplerate"), NULL); | |
68 | if (sr_parse_sizestring(s, &samplerate) != SR_OK) { | |
69 | sr_err("Invalid samplerate '%s'.", s); | |
70 | return SR_ERR_ARG; | |
71 | } | |
72 | ||
73 | in->sdi = sr_dev_inst_new(0, SR_ST_ACTIVE, NULL, NULL, NULL); | |
74 | in->priv = inc = g_malloc0(sizeof(struct context)); | |
75 | inc->samplerate = samplerate; | |
76 | ||
77 | for (i = 0; i < num_channels; i++) { | |
78 | snprintf(name, 16, "%d", i); | |
79 | ch = sr_channel_new(i, SR_CHANNEL_LOGIC, TRUE, name); | |
80 | in->sdi->channels = g_slist_append(in->sdi->channels, ch); | |
81 | } | |
82 | ||
83 | return SR_OK; | |
84 | } | |
85 | ||
86 | static int receive(const struct sr_input *in, GString *buf) | |
87 | { | |
88 | struct sr_datafeed_packet packet; | |
89 | struct sr_datafeed_meta meta; | |
90 | struct sr_datafeed_logic logic; | |
91 | struct sr_config *src; | |
92 | struct context *inc; | |
93 | gsize chunk_size, i; | |
94 | int chunk, num_channels; | |
95 | ||
96 | inc = in->priv; | |
97 | ||
98 | g_string_append_len(in->buf, buf->str, buf->len); | |
99 | ||
100 | num_channels = g_slist_length(in->sdi->channels); | |
101 | ||
102 | std_session_send_df_header(in->sdi, LOG_PREFIX); | |
103 | inc->started = TRUE; | |
104 | ||
105 | packet.type = SR_DF_META; | |
106 | packet.payload = &meta; | |
107 | src = sr_config_new(SR_CONF_SAMPLERATE, g_variant_new_uint64(inc->samplerate)); | |
108 | meta.config = g_slist_append(NULL, src); | |
109 | sr_session_send(in->sdi, &packet); | |
110 | sr_config_free(src); | |
111 | ||
112 | packet.type = SR_DF_LOGIC; | |
113 | packet.payload = &logic; | |
114 | logic.unitsize = (num_channels + 7) / 8; | |
115 | logic.data = in->buf->str; | |
116 | ||
117 | /* Cut off at multiple of unitsize. */ | |
118 | chunk_size = in->buf->len / logic.unitsize * logic.unitsize; | |
119 | ||
120 | chunk = 0; | |
121 | for (i = 0; i < chunk_size; i += chunk) { | |
122 | chunk = MAX(MAX_CHUNK_SIZE, chunk_size - i); | |
123 | logic.length = chunk; | |
124 | sr_session_send(in->sdi, &packet); | |
125 | } | |
126 | ||
127 | if (in->buf->len > chunk_size) | |
128 | g_string_erase(in->buf, 0, in->buf->len - chunk_size); | |
129 | ||
130 | return SR_OK; | |
131 | } | |
132 | ||
133 | static int cleanup(struct sr_input *in) | |
134 | { | |
135 | struct sr_datafeed_packet packet; | |
136 | struct context *inc; | |
137 | ||
138 | inc = in->priv; | |
139 | ||
140 | if (inc->started) { | |
141 | packet.type = SR_DF_END; | |
142 | sr_session_send(in->sdi, &packet); | |
143 | } | |
144 | g_free(in->priv); | |
145 | in->priv = NULL; | |
146 | ||
147 | return SR_OK; | |
148 | } | |
149 | ||
150 | static struct sr_option options[] = { | |
151 | { "numchannels", "Number of channels", "Number of channels", NULL, NULL }, | |
152 | { "samplerate", "Sample rate", "Sample rate", NULL, NULL }, | |
153 | { 0 } | |
154 | }; | |
155 | ||
156 | static struct sr_option *get_options(void) | |
157 | { | |
158 | if (!options[0].def) { | |
159 | options[0].def = g_variant_ref_sink(g_variant_new_int32(DEFAULT_NUM_CHANNELS)); | |
160 | options[1].def = g_variant_ref_sink(g_variant_new_string(DEFAULT_SAMPLERATE)); | |
161 | } | |
162 | ||
163 | return options; | |
164 | } | |
165 | ||
166 | SR_PRIV struct sr_input_module input_chronovu_la8 = { | |
167 | .id = "chronovu-la8", | |
168 | .name = "Chronovu-LA8", | |
169 | .desc = "ChronoVu LA8", | |
170 | .metadata = { SR_INPUT_META_FILESIZE | SR_INPUT_META_REQUIRED }, | |
171 | .options = get_options, | |
172 | .format_match = format_match, | |
173 | .init = init, | |
174 | .receive = receive, | |
175 | .cleanup = cleanup, | |
176 | }; |