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4c9ffa83 UH |
1 | /* |
2 | * This file is part of the sigrok project. | |
3 | * | |
4 | * Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de> | |
13d8e03c | 5 | * Copyright (C) 2013 Bert Vermeulen <bert@biot.com> |
4c9ffa83 UH |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
20 | */ | |
21 | ||
22 | #include <stdlib.h> | |
23 | #include <string.h> | |
24 | #include <glib.h> | |
545f9786 | 25 | #include "config.h" /* Needed for PACKAGE and others. */ |
45c59c8b BV |
26 | #include "libsigrok.h" |
27 | #include "libsigrok-internal.h" | |
4c9ffa83 | 28 | |
a944a84b UH |
29 | /* Message logging helpers with driver-specific prefix string. */ |
30 | #define DRIVER_LOG_DOMAIN "output/vcd: " | |
31 | #define sr_log(l, s, args...) sr_log(l, DRIVER_LOG_DOMAIN s, ## args) | |
32 | #define sr_spew(s, args...) sr_spew(DRIVER_LOG_DOMAIN s, ## args) | |
33 | #define sr_dbg(s, args...) sr_dbg(DRIVER_LOG_DOMAIN s, ## args) | |
34 | #define sr_info(s, args...) sr_info(DRIVER_LOG_DOMAIN s, ## args) | |
35 | #define sr_warn(s, args...) sr_warn(DRIVER_LOG_DOMAIN s, ## args) | |
36 | #define sr_err(s, args...) sr_err(DRIVER_LOG_DOMAIN s, ## args) | |
37 | ||
4c9ffa83 UH |
38 | struct context { |
39 | int num_enabled_probes; | |
8ec95d22 | 40 | char *probelist[SR_MAX_NUM_PROBES + 1]; |
ba6568c5 | 41 | int probeindices[SR_MAX_NUM_PROBES + 1]; |
4c9ffa83 | 42 | int *prevbits; |
fbf1ff5d | 43 | GString *header; |
08b488b8 | 44 | uint64_t prevsample; |
b33e7d70 HE |
45 | int period; |
46 | uint64_t samplerate; | |
4c9ffa83 UH |
47 | }; |
48 | ||
d078d2e5 | 49 | static const char *vcd_header_comment = "\ |
7aae7462 BV |
50 | $comment\n Acquisition with %d/%d probes at %s\n$end\n"; |
51 | ||
f50f3f40 | 52 | static int init(struct sr_output *o) |
4c9ffa83 | 53 | { |
4c9ffa83 | 54 | struct context *ctx; |
1afe8989 | 55 | struct sr_probe *probe; |
4c9ffa83 | 56 | GSList *l; |
ec4063b8 | 57 | GVariant *gvar; |
b33e7d70 | 58 | int num_probes, i; |
fbf1ff5d | 59 | char *samplerate_s, *frequency_s, *timestamp; |
5cca9adb | 60 | time_t t; |
4c9ffa83 | 61 | |
133a37bf | 62 | if (!(ctx = g_try_malloc0(sizeof(struct context)))) { |
a944a84b | 63 | sr_err("%s: ctx malloc failed", __func__); |
e46b8fb1 | 64 | return SR_ERR_MALLOC; |
133a37bf | 65 | } |
757b8c62 | 66 | |
4c9ffa83 UH |
67 | o->internal = ctx; |
68 | ctx->num_enabled_probes = 0; | |
757b8c62 | 69 | |
5c3c1241 | 70 | for (l = o->sdi->probes; l; l = l->next) { |
4c9ffa83 | 71 | probe = l->data; |
757b8c62 UH |
72 | if (!probe->enabled) |
73 | continue; | |
ba6568c5 BV |
74 | ctx->probelist[ctx->num_enabled_probes] = probe->name; |
75 | ctx->probeindices[ctx->num_enabled_probes] = probe->index; | |
76 | ctx->num_enabled_probes++; | |
4c9ffa83 | 77 | } |
fbf1ff5d | 78 | if (ctx->num_enabled_probes > 94) { |
a944a84b | 79 | sr_err("VCD only supports 94 probes."); |
e46b8fb1 | 80 | return SR_ERR; |
fbf1ff5d | 81 | } |
4c9ffa83 UH |
82 | |
83 | ctx->probelist[ctx->num_enabled_probes] = 0; | |
fbf1ff5d | 84 | ctx->header = g_string_sized_new(512); |
5c3c1241 | 85 | num_probes = g_slist_length(o->sdi->probes); |
4c9ffa83 | 86 | |
fbf1ff5d BV |
87 | /* timestamp */ |
88 | t = time(NULL); | |
133a37bf | 89 | timestamp = g_strdup(ctime(&t)); |
fbf1ff5d BV |
90 | timestamp[strlen(timestamp)-1] = 0; |
91 | g_string_printf(ctx->header, "$date %s $end\n", timestamp); | |
133a37bf | 92 | g_free(timestamp); |
4c9ffa83 | 93 | |
fbf1ff5d BV |
94 | /* generator */ |
95 | g_string_append_printf(ctx->header, "$version %s %s $end\n", | |
96 | PACKAGE, PACKAGE_VERSION); | |
4c9ffa83 | 97 | |
4d15e5c9 | 98 | if (o->sdi->driver && sr_dev_has_option(o->sdi, SR_CONF_SAMPLERATE)) { |
ec4063b8 BV |
99 | o->sdi->driver->config_get(SR_CONF_SAMPLERATE, &gvar, o->sdi); |
100 | ctx->samplerate = g_variant_get_uint64(gvar); | |
a00ba012 | 101 | if (!((samplerate_s = sr_samplerate_string(ctx->samplerate)))) { |
fbf1ff5d | 102 | g_string_free(ctx->header, TRUE); |
133a37bf | 103 | g_free(ctx); |
ec4063b8 | 104 | g_variant_unref(gvar); |
e46b8fb1 | 105 | return SR_ERR; |
6b5e3cee | 106 | } |
fbf1ff5d BV |
107 | g_string_append_printf(ctx->header, vcd_header_comment, |
108 | ctx->num_enabled_probes, num_probes, samplerate_s); | |
133a37bf | 109 | g_free(samplerate_s); |
ec4063b8 | 110 | g_variant_unref(gvar); |
7aae7462 | 111 | } |
4c9ffa83 | 112 | |
fbf1ff5d BV |
113 | /* timescale */ |
114 | /* VCD can only handle 1/10/100 (s - fs), so scale up first */ | |
59df0c77 UH |
115 | if (ctx->samplerate > SR_MHZ(1)) |
116 | ctx->period = SR_GHZ(1); | |
117 | else if (ctx->samplerate > SR_KHZ(1)) | |
118 | ctx->period = SR_MHZ(1); | |
fbf1ff5d | 119 | else |
59df0c77 | 120 | ctx->period = SR_KHZ(1); |
a00ba012 | 121 | if (!(frequency_s = sr_period_string(ctx->period))) { |
fbf1ff5d | 122 | g_string_free(ctx->header, TRUE); |
133a37bf | 123 | g_free(ctx); |
e46b8fb1 | 124 | return SR_ERR; |
fbf1ff5d BV |
125 | } |
126 | g_string_append_printf(ctx->header, "$timescale %s $end\n", frequency_s); | |
133a37bf | 127 | g_free(frequency_s); |
fbf1ff5d BV |
128 | |
129 | /* scope */ | |
130 | g_string_append_printf(ctx->header, "$scope module %s $end\n", PACKAGE); | |
131 | ||
4c9ffa83 | 132 | /* Wires / channels */ |
bc010c05 | 133 | for (i = 0; i < ctx->num_enabled_probes; i++) { |
fbf1ff5d BV |
134 | g_string_append_printf(ctx->header, "$var wire 1 %c %s $end\n", |
135 | (char)('!' + i), ctx->probelist[i]); | |
4c9ffa83 UH |
136 | } |
137 | ||
fbf1ff5d BV |
138 | g_string_append(ctx->header, "$upscope $end\n" |
139 | "$enddefinitions $end\n$dumpvars\n"); | |
4c9ffa83 | 140 | |
133a37bf | 141 | if (!(ctx->prevbits = g_try_malloc0(sizeof(int) * num_probes))) { |
fbf1ff5d | 142 | g_string_free(ctx->header, TRUE); |
133a37bf | 143 | g_free(ctx); |
a944a84b | 144 | sr_err("%s: ctx->prevbits malloc failed", __func__); |
e46b8fb1 | 145 | return SR_ERR_MALLOC; |
6b5e3cee | 146 | } |
5a8fda15 | 147 | |
e46b8fb1 | 148 | return SR_OK; |
4c9ffa83 UH |
149 | } |
150 | ||
bbe6e336 | 151 | static GString *receive(struct sr_output *o, const struct sr_dev_inst *sdi, |
d5585e32 | 152 | const struct sr_datafeed_packet *packet) |
4c9ffa83 | 153 | { |
d5585e32 | 154 | const struct sr_datafeed_logic *logic; |
4c9ffa83 | 155 | struct context *ctx; |
d5585e32 | 156 | GString *text; |
fbf1ff5d | 157 | unsigned int i; |
ba6568c5 | 158 | int p, curbit, prevbit, index; |
08b488b8 | 159 | uint64_t sample; |
086eac7c | 160 | static uint64_t samplecount = 0; |
d5585e32 | 161 | gboolean first_sample; |
4c9ffa83 | 162 | |
d5585e32 BV |
163 | (void)sdi; |
164 | ||
165 | if (!o || !o->internal) | |
166 | return NULL; | |
4c9ffa83 | 167 | ctx = o->internal; |
d5585e32 BV |
168 | |
169 | if (packet->type == SR_DF_END) { | |
170 | text = g_string_sized_new(16); | |
171 | g_string_printf(text, "$dumpoff\n$end\n"); | |
172 | return text; | |
173 | } else if (packet->type != SR_DF_LOGIC) | |
174 | return NULL; | |
6b5e3cee | 175 | |
4c9ffa83 UH |
176 | if (ctx->header) { |
177 | /* The header is still here, this must be the first packet. */ | |
d5585e32 | 178 | text = ctx->header; |
4c9ffa83 | 179 | ctx->header = NULL; |
d5585e32 BV |
180 | first_sample = TRUE; |
181 | } else { | |
182 | text = g_string_sized_new(512); | |
183 | first_sample = FALSE; | |
4c9ffa83 UH |
184 | } |
185 | ||
d5585e32 BV |
186 | logic = packet->payload; |
187 | for (i = 0; i <= logic->length - logic->unitsize; i += logic->unitsize) { | |
086eac7c | 188 | samplecount++; |
08b488b8 | 189 | |
d5585e32 | 190 | memcpy(&sample, logic->data + i, logic->unitsize); |
08b488b8 HE |
191 | |
192 | if (first_sample) { | |
193 | /* First packet. We neg to make sure sample is stored. */ | |
194 | ctx->prevsample = ~sample; | |
d5585e32 | 195 | first_sample = FALSE; |
08b488b8 HE |
196 | } |
197 | ||
4c9ffa83 | 198 | for (p = 0; p < ctx->num_enabled_probes; p++) { |
ba6568c5 BV |
199 | index = ctx->probeindices[p]; |
200 | curbit = (sample & (((uint64_t) 1) << index)) >> index; | |
201 | prevbit = (ctx->prevsample & (((uint64_t) 1) << index)) >> index; | |
fbe2f794 UH |
202 | |
203 | /* VCD only contains deltas/changes of signals. */ | |
607b58de UH |
204 | if (prevbit == curbit) |
205 | continue; | |
4c9ffa83 | 206 | |
fbe2f794 | 207 | /* Output which signal changed to which value. */ |
d5585e32 | 208 | g_string_append_printf(text, "#%" PRIu64 "\n%i%c\n", |
32c0551b | 209 | (uint64_t)(((float)samplecount / ctx->samplerate) |
b33e7d70 | 210 | * ctx->period), curbit, (char)('!' + p)); |
4c9ffa83 | 211 | } |
08b488b8 HE |
212 | |
213 | ctx->prevsample = sample; | |
4c9ffa83 UH |
214 | } |
215 | ||
d5585e32 BV |
216 | return text; |
217 | } | |
218 | ||
219 | static int cleanup(struct sr_output *o) | |
220 | { | |
221 | struct context *ctx; | |
222 | ||
223 | if (!o || !o->internal) | |
224 | return SR_ERR_ARG; | |
225 | ||
226 | ctx = o->internal; | |
227 | g_free(ctx); | |
4c9ffa83 | 228 | |
e46b8fb1 | 229 | return SR_OK; |
4c9ffa83 UH |
230 | } |
231 | ||
f50f3f40 | 232 | struct sr_output_format output_vcd = { |
cdb3573c | 233 | .id = "vcd", |
d494a4aa UH |
234 | .description = "Value Change Dump (VCD)", |
235 | .df_type = SR_DF_LOGIC, | |
236 | .init = init, | |
bbe6e336 UH |
237 | .recv = receive, |
238 | .cleanup = cleanup, | |
4c9ffa83 | 239 | }; |