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83e9d586 | 1 | /* |
50985c20 | 2 | * This file is part of the libsigrok project. |
83e9d586 UH |
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 | |
2ea1fdf1 | 17 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
83e9d586 UH |
18 | */ |
19 | ||
6ec6c43b | 20 | #include <config.h> |
83e9d586 UH |
21 | #include <stdlib.h> |
22 | #include <fcntl.h> | |
23 | #include <unistd.h> | |
36423d04 | 24 | #include <sys/stat.h> |
c1aae900 | 25 | #include <libsigrok/libsigrok.h> |
45c59c8b | 26 | #include "libsigrok-internal.h" |
83e9d586 | 27 | |
b95dd761 | 28 | #define LOG_PREFIX "input/chronovu-la8" |
8e7f1cfd | 29 | |
02e24c0c | 30 | #define DEFAULT_NUM_CHANNELS 8 |
1a46cc62 | 31 | #define DEFAULT_SAMPLERATE SR_MHZ(100) |
9a4fd01a | 32 | #define CHUNK_SIZE (4 * 1024 * 1024) |
e8eb2422 GS |
33 | |
34 | /* | |
35 | * File layout: | |
36 | * - Fixed size 8MiB data part at offset 0. | |
37 | * - Either one byte per sample for LA8. | |
38 | * - Or two bytes per sample for LA16, in little endian format. | |
39 | * - Five byte "header" at offset 8MiB. | |
40 | * - One "clock divider" byte. The byte value is the divider factor | |
41 | * minus 1. Value 0xff is invalid. Base clock is 100MHz for LA8, or | |
42 | * 200MHz for LA16. | |
43 | * - Four bytes for the trigger position. This 32bit value is the | |
44 | * sample number in little endian format, or 0 when unused. | |
45 | */ | |
46 | #define CHRONOVU_LA8_DATASIZE (8 * 1024 * 1024) | |
47 | #define CHRONOVU_LA8_HDRSIZE (sizeof(uint8_t) + sizeof(uint32_t)) | |
48 | #define CHRONOVU_LA8_FILESIZE (CHRONOVU_LA8_DATASIZE + CHRONOVU_LA8_HDRSIZE) | |
83e9d586 | 49 | |
02e24c0c BV |
50 | struct context { |
51 | gboolean started; | |
52 | uint64_t samplerate; | |
e8eb2422 | 53 | uint64_t samples_remain; |
02e24c0c | 54 | }; |
83e9d586 | 55 | |
54ee427d | 56 | static int format_match(GHashTable *metadata, unsigned int *confidence) |
83e9d586 | 57 | { |
f54a55da | 58 | uint64_t size; |
83e9d586 | 59 | |
54ee427d GS |
60 | /* |
61 | * In the absence of a reliable condition like magic strings, | |
62 | * we can only guess based on the file size. Since this is | |
63 | * rather weak a condition, signal "little confidence" and | |
64 | * optionally give precedence to better matches. | |
65 | */ | |
f54a55da | 66 | size = GPOINTER_TO_SIZE(g_hash_table_lookup(metadata, |
02e24c0c | 67 | GINT_TO_POINTER(SR_INPUT_META_FILESIZE))); |
54ee427d GS |
68 | if (size != CHRONOVU_LA8_FILESIZE) |
69 | return SR_ERR; | |
70 | *confidence = 100; | |
83e9d586 | 71 | |
54ee427d | 72 | return SR_OK; |
83e9d586 UH |
73 | } |
74 | ||
02e24c0c | 75 | static int init(struct sr_input *in, GHashTable *options) |
83e9d586 | 76 | { |
02e24c0c | 77 | struct context *inc; |
ba7dd8bb | 78 | int num_channels, i; |
02e24c0c BV |
79 | char name[16]; |
80 | ||
81 | num_channels = g_variant_get_int32(g_hash_table_lookup(options, "numchannels")); | |
82 | if (num_channels < 1) { | |
83 | sr_err("Invalid value for numchannels: must be at least 1."); | |
84 | return SR_ERR_ARG; | |
85 | } | |
86 | ||
aac29cc1 | 87 | in->sdi = g_malloc0(sizeof(struct sr_dev_inst)); |
02e24c0c | 88 | in->priv = inc = g_malloc0(sizeof(struct context)); |
edd28877 BV |
89 | |
90 | inc->samplerate = g_variant_get_uint64(g_hash_table_lookup(options, "samplerate")); | |
464d12c7 | 91 | |
ba7dd8bb | 92 | for (i = 0; i < num_channels; i++) { |
00ed77f2 | 93 | snprintf(name, sizeof(name), "%d", i); |
5e23fcab | 94 | sr_channel_new(in->sdi, i, SR_CHANNEL_LOGIC, TRUE, name); |
464d12c7 | 95 | } |
83e9d586 UH |
96 | |
97 | return SR_OK; | |
98 | } | |
99 | ||
7066fd46 | 100 | static int process_buffer(struct sr_input *in) |
83e9d586 | 101 | { |
83e9d586 | 102 | struct sr_datafeed_packet packet; |
2df1e819 | 103 | struct sr_datafeed_meta meta; |
9c939c51 | 104 | struct sr_datafeed_logic logic; |
2df1e819 | 105 | struct sr_config *src; |
02e24c0c BV |
106 | struct context *inc; |
107 | gsize chunk_size, i; | |
e8eb2422 GS |
108 | gsize chunk; |
109 | uint16_t unitsize; | |
83e9d586 | 110 | |
02e24c0c | 111 | inc = in->priv; |
e8eb2422 GS |
112 | unitsize = (g_slist_length(in->sdi->channels) + 7) / 8; |
113 | ||
04c2f202 | 114 | if (!inc->started) { |
bee2b016 | 115 | std_session_send_df_header(in->sdi); |
04c2f202 | 116 | |
d0181813 BV |
117 | if (inc->samplerate) { |
118 | packet.type = SR_DF_META; | |
119 | packet.payload = &meta; | |
120 | src = sr_config_new(SR_CONF_SAMPLERATE, g_variant_new_uint64(inc->samplerate)); | |
121 | meta.config = g_slist_append(NULL, src); | |
122 | sr_session_send(in->sdi, &packet); | |
c01378c9 | 123 | g_slist_free(meta.config); |
d0181813 BV |
124 | sr_config_free(src); |
125 | } | |
126 | ||
e8eb2422 GS |
127 | inc->samples_remain = CHRONOVU_LA8_DATASIZE; |
128 | inc->samples_remain /= unitsize; | |
129 | ||
d0181813 | 130 | inc->started = TRUE; |
04c2f202 | 131 | } |
83e9d586 | 132 | |
83e9d586 | 133 | packet.type = SR_DF_LOGIC; |
9c939c51 | 134 | packet.payload = &logic; |
e8eb2422 | 135 | logic.unitsize = unitsize; |
02e24c0c | 136 | |
e8eb2422 | 137 | /* Cut off at multiple of unitsize. Avoid sending the "header". */ |
02e24c0c | 138 | chunk_size = in->buf->len / logic.unitsize * logic.unitsize; |
e8eb2422 | 139 | chunk_size = MIN(chunk_size, inc->samples_remain * unitsize); |
83e9d586 | 140 | |
02e24c0c | 141 | for (i = 0; i < chunk_size; i += chunk) { |
04c2f202 | 142 | logic.data = in->buf->str + i; |
8bc2fa6d | 143 | chunk = MIN(CHUNK_SIZE, chunk_size - i); |
e8eb2422 GS |
144 | if (chunk) { |
145 | logic.length = chunk; | |
146 | sr_session_send(in->sdi, &packet); | |
147 | inc->samples_remain -= chunk / unitsize; | |
148 | } | |
83e9d586 | 149 | } |
04c2f202 | 150 | g_string_erase(in->buf, 0, chunk_size); |
02e24c0c BV |
151 | |
152 | return SR_OK; | |
153 | } | |
154 | ||
7066fd46 BV |
155 | static int receive(struct sr_input *in, GString *buf) |
156 | { | |
157 | int ret; | |
158 | ||
159 | g_string_append_len(in->buf, buf->str, buf->len); | |
160 | ||
161 | if (!in->sdi_ready) { | |
162 | /* sdi is ready, notify frontend. */ | |
163 | in->sdi_ready = TRUE; | |
164 | return SR_OK; | |
165 | } | |
166 | ||
167 | ret = process_buffer(in); | |
168 | ||
169 | return ret; | |
170 | } | |
171 | ||
172 | static int end(struct sr_input *in) | |
02e24c0c | 173 | { |
02e24c0c | 174 | struct context *inc; |
7066fd46 | 175 | int ret; |
02e24c0c | 176 | |
7066fd46 BV |
177 | if (in->sdi_ready) |
178 | ret = process_buffer(in); | |
179 | else | |
180 | ret = SR_OK; | |
02e24c0c | 181 | |
7066fd46 | 182 | inc = in->priv; |
3be42bc2 | 183 | if (inc->started) |
bee2b016 | 184 | std_session_send_df_end(in->sdi); |
83e9d586 | 185 | |
7066fd46 | 186 | return ret; |
83e9d586 UH |
187 | } |
188 | ||
ef9d3fef SA |
189 | static int reset(struct sr_input *in) |
190 | { | |
191 | struct context *inc = in->priv; | |
192 | ||
193 | inc->started = FALSE; | |
194 | g_string_truncate(in->buf, 0); | |
195 | ||
196 | return SR_OK; | |
197 | } | |
198 | ||
02e24c0c | 199 | static struct sr_option options[] = { |
867293a1 UH |
200 | { "numchannels", "Number of logic channels", "The number of (logic) channels in the data", NULL, NULL }, |
201 | { "samplerate", "Sample rate (Hz)", "The sample rate of the (logic) data in Hz", NULL, NULL }, | |
06ad20be | 202 | ALL_ZERO |
02e24c0c BV |
203 | }; |
204 | ||
2c240774 | 205 | static const struct sr_option *get_options(void) |
02e24c0c BV |
206 | { |
207 | if (!options[0].def) { | |
208 | options[0].def = g_variant_ref_sink(g_variant_new_int32(DEFAULT_NUM_CHANNELS)); | |
edd28877 | 209 | options[1].def = g_variant_ref_sink(g_variant_new_uint64(DEFAULT_SAMPLERATE)); |
02e24c0c BV |
210 | } |
211 | ||
212 | return options; | |
213 | } | |
214 | ||
d4c93774 | 215 | SR_PRIV struct sr_input_module input_chronovu_la8 = { |
83e9d586 | 216 | .id = "chronovu-la8", |
b20eb520 UH |
217 | .name = "ChronoVu LA8", |
218 | .desc = "ChronoVu LA8 native file format data", | |
c7bc82ff | 219 | .exts = (const char*[]){"kdt", NULL}, |
02e24c0c BV |
220 | .metadata = { SR_INPUT_META_FILESIZE | SR_INPUT_META_REQUIRED }, |
221 | .options = get_options, | |
83e9d586 UH |
222 | .format_match = format_match, |
223 | .init = init, | |
02e24c0c | 224 | .receive = receive, |
7066fd46 | 225 | .end = end, |
ef9d3fef | 226 | .reset = reset, |
83e9d586 | 227 | }; |