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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> | |
c73d2ea4 | 5 | * Copyright (C) 2010-2012 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> | |
1a081ca6 | 25 | #include "config.h" |
cd315a80 UH |
26 | #include "sigrok.h" |
27 | #include "sigrok-internal.h" | |
4c9ffa83 UH |
28 | |
29 | struct context { | |
30 | int num_enabled_probes; | |
31 | int unitsize; | |
8ec95d22 | 32 | char *probelist[SR_MAX_NUM_PROBES + 1]; |
4c9ffa83 | 33 | int *prevbits; |
fbf1ff5d | 34 | GString *header; |
08b488b8 | 35 | uint64_t prevsample; |
b33e7d70 HE |
36 | int period; |
37 | uint64_t samplerate; | |
4c9ffa83 UH |
38 | }; |
39 | ||
d078d2e5 | 40 | static const char *vcd_header_comment = "\ |
7aae7462 BV |
41 | $comment\n Acquisition with %d/%d probes at %s\n$end\n"; |
42 | ||
f50f3f40 | 43 | static int init(struct sr_output *o) |
4c9ffa83 | 44 | { |
4c9ffa83 | 45 | struct context *ctx; |
1afe8989 | 46 | struct sr_probe *probe; |
4c9ffa83 | 47 | GSList *l; |
b33e7d70 | 48 | int num_probes, i; |
fbf1ff5d | 49 | char *samplerate_s, *frequency_s, *timestamp; |
5cca9adb | 50 | time_t t; |
4c9ffa83 | 51 | |
133a37bf UH |
52 | if (!(ctx = g_try_malloc0(sizeof(struct context)))) { |
53 | sr_err("vcd out: %s: ctx malloc failed", __func__); | |
e46b8fb1 | 54 | return SR_ERR_MALLOC; |
133a37bf | 55 | } |
757b8c62 | 56 | |
4c9ffa83 UH |
57 | o->internal = ctx; |
58 | ctx->num_enabled_probes = 0; | |
757b8c62 | 59 | |
bb7ef793 | 60 | for (l = o->dev->probes; l; l = l->next) { |
4c9ffa83 | 61 | probe = l->data; |
757b8c62 UH |
62 | if (!probe->enabled) |
63 | continue; | |
64 | ctx->probelist[ctx->num_enabled_probes++] = probe->name; | |
4c9ffa83 | 65 | } |
fbf1ff5d | 66 | if (ctx->num_enabled_probes > 94) { |
7b48d6e1 | 67 | sr_err("vcd out: VCD only supports 94 probes."); |
e46b8fb1 | 68 | return SR_ERR; |
fbf1ff5d | 69 | } |
4c9ffa83 UH |
70 | |
71 | ctx->probelist[ctx->num_enabled_probes] = 0; | |
72 | ctx->unitsize = (ctx->num_enabled_probes + 7) / 8; | |
fbf1ff5d | 73 | ctx->header = g_string_sized_new(512); |
bb7ef793 | 74 | num_probes = g_slist_length(o->dev->probes); |
4c9ffa83 | 75 | |
fbf1ff5d BV |
76 | /* timestamp */ |
77 | t = time(NULL); | |
133a37bf | 78 | timestamp = g_strdup(ctime(&t)); |
fbf1ff5d BV |
79 | timestamp[strlen(timestamp)-1] = 0; |
80 | g_string_printf(ctx->header, "$date %s $end\n", timestamp); | |
133a37bf | 81 | g_free(timestamp); |
4c9ffa83 | 82 | |
fbf1ff5d BV |
83 | /* generator */ |
84 | g_string_append_printf(ctx->header, "$version %s %s $end\n", | |
85 | PACKAGE, PACKAGE_VERSION); | |
4c9ffa83 | 86 | |
c09f0b57 UH |
87 | if (o->dev->driver && sr_dev_has_hwcap(o->dev, SR_HWCAP_SAMPLERATE)) { |
88 | ctx->samplerate = *((uint64_t *) o->dev->driver->dev_info_get( | |
89 | o->dev->driver_index, SR_DI_CUR_SAMPLERATE)); | |
a00ba012 | 90 | if (!((samplerate_s = sr_samplerate_string(ctx->samplerate)))) { |
fbf1ff5d | 91 | g_string_free(ctx->header, TRUE); |
133a37bf | 92 | g_free(ctx); |
e46b8fb1 | 93 | return SR_ERR; |
6b5e3cee | 94 | } |
fbf1ff5d BV |
95 | g_string_append_printf(ctx->header, vcd_header_comment, |
96 | ctx->num_enabled_probes, num_probes, samplerate_s); | |
133a37bf | 97 | g_free(samplerate_s); |
7aae7462 | 98 | } |
4c9ffa83 | 99 | |
fbf1ff5d BV |
100 | /* timescale */ |
101 | /* VCD can only handle 1/10/100 (s - fs), so scale up first */ | |
59df0c77 UH |
102 | if (ctx->samplerate > SR_MHZ(1)) |
103 | ctx->period = SR_GHZ(1); | |
104 | else if (ctx->samplerate > SR_KHZ(1)) | |
105 | ctx->period = SR_MHZ(1); | |
fbf1ff5d | 106 | else |
59df0c77 | 107 | ctx->period = SR_KHZ(1); |
a00ba012 | 108 | if (!(frequency_s = sr_period_string(ctx->period))) { |
fbf1ff5d | 109 | g_string_free(ctx->header, TRUE); |
133a37bf | 110 | g_free(ctx); |
e46b8fb1 | 111 | return SR_ERR; |
fbf1ff5d BV |
112 | } |
113 | g_string_append_printf(ctx->header, "$timescale %s $end\n", frequency_s); | |
133a37bf | 114 | g_free(frequency_s); |
fbf1ff5d BV |
115 | |
116 | /* scope */ | |
117 | g_string_append_printf(ctx->header, "$scope module %s $end\n", PACKAGE); | |
118 | ||
4c9ffa83 | 119 | /* Wires / channels */ |
bc010c05 | 120 | for (i = 0; i < ctx->num_enabled_probes; i++) { |
fbf1ff5d BV |
121 | g_string_append_printf(ctx->header, "$var wire 1 %c %s $end\n", |
122 | (char)('!' + i), ctx->probelist[i]); | |
4c9ffa83 UH |
123 | } |
124 | ||
fbf1ff5d BV |
125 | g_string_append(ctx->header, "$upscope $end\n" |
126 | "$enddefinitions $end\n$dumpvars\n"); | |
4c9ffa83 | 127 | |
133a37bf | 128 | if (!(ctx->prevbits = g_try_malloc0(sizeof(int) * num_probes))) { |
fbf1ff5d | 129 | g_string_free(ctx->header, TRUE); |
133a37bf UH |
130 | g_free(ctx); |
131 | sr_err("vcd out: %s: ctx->prevbits malloc failed", __func__); | |
e46b8fb1 | 132 | return SR_ERR_MALLOC; |
6b5e3cee | 133 | } |
5a8fda15 | 134 | |
e46b8fb1 | 135 | return SR_OK; |
4c9ffa83 UH |
136 | } |
137 | ||
054e6709 | 138 | static int event(struct sr_output *o, int event_type, uint8_t **data_out, |
4c9ffa83 UH |
139 | uint64_t *length_out) |
140 | { | |
054e6709 | 141 | uint8_t *outbuf; |
4c9ffa83 | 142 | |
99c1fc59 | 143 | switch (event_type) { |
5a2326a7 | 144 | case SR_DF_END: |
054e6709 | 145 | outbuf = (uint8_t *)g_strdup("$dumpoff\n$end\n"); |
4c9ffa83 | 146 | *data_out = outbuf; |
054e6709 | 147 | *length_out = strlen((const char *)outbuf); |
133a37bf | 148 | g_free(o->internal); |
4c9ffa83 UH |
149 | o->internal = NULL; |
150 | break; | |
9ab95e54 BV |
151 | default: |
152 | *data_out = NULL; | |
153 | *length_out = 0; | |
154 | break; | |
4c9ffa83 UH |
155 | } |
156 | ||
e46b8fb1 | 157 | return SR_OK; |
4c9ffa83 UH |
158 | } |
159 | ||
054e6709 UH |
160 | static int data(struct sr_output *o, const uint8_t *data_in, |
161 | uint64_t length_in, uint8_t **data_out, uint64_t *length_out) | |
4c9ffa83 UH |
162 | { |
163 | struct context *ctx; | |
fbf1ff5d | 164 | unsigned int i; |
afc8e4de | 165 | int p, curbit, prevbit; |
08b488b8 | 166 | uint64_t sample; |
086eac7c | 167 | static uint64_t samplecount = 0; |
fbf1ff5d | 168 | GString *out; |
08b488b8 | 169 | int first_sample = 0; |
4c9ffa83 UH |
170 | |
171 | ctx = o->internal; | |
fbf1ff5d | 172 | out = g_string_sized_new(512); |
6b5e3cee | 173 | |
4c9ffa83 UH |
174 | if (ctx->header) { |
175 | /* The header is still here, this must be the first packet. */ | |
fbf1ff5d BV |
176 | g_string_append(out, ctx->header->str); |
177 | g_string_free(ctx->header, TRUE); | |
4c9ffa83 | 178 | ctx->header = NULL; |
08b488b8 | 179 | first_sample = 1; |
4c9ffa83 UH |
180 | } |
181 | ||
607b58de | 182 | for (i = 0; i <= length_in - ctx->unitsize; i += ctx->unitsize) { |
086eac7c | 183 | samplecount++; |
08b488b8 | 184 | |
607b58de | 185 | memcpy(&sample, data_in + i, ctx->unitsize); |
08b488b8 HE |
186 | |
187 | if (first_sample) { | |
188 | /* First packet. We neg to make sure sample is stored. */ | |
189 | ctx->prevsample = ~sample; | |
190 | first_sample = 0; | |
191 | } | |
192 | ||
4c9ffa83 | 193 | for (p = 0; p < ctx->num_enabled_probes; p++) { |
fbe2f794 | 194 | curbit = (sample & ((uint64_t) (1 << p))) >> p; |
08b488b8 | 195 | prevbit = (ctx->prevsample & ((uint64_t) (1 << p))) >> p; |
fbe2f794 UH |
196 | |
197 | /* VCD only contains deltas/changes of signals. */ | |
607b58de UH |
198 | if (prevbit == curbit) |
199 | continue; | |
4c9ffa83 | 200 | |
fbe2f794 | 201 | /* Output which signal changed to which value. */ |
b33e7d70 | 202 | g_string_append_printf(out, "#%" PRIu64 "\n%i%c\n", |
32c0551b | 203 | (uint64_t)(((float)samplecount / ctx->samplerate) |
b33e7d70 | 204 | * ctx->period), curbit, (char)('!' + p)); |
4c9ffa83 | 205 | } |
08b488b8 HE |
206 | |
207 | ctx->prevsample = sample; | |
4c9ffa83 UH |
208 | } |
209 | ||
054e6709 | 210 | *data_out = (uint8_t *)out->str; |
fbf1ff5d BV |
211 | *length_out = out->len; |
212 | g_string_free(out, FALSE); | |
4c9ffa83 | 213 | |
e46b8fb1 | 214 | return SR_OK; |
4c9ffa83 UH |
215 | } |
216 | ||
f50f3f40 | 217 | struct sr_output_format output_vcd = { |
cdb3573c | 218 | .id = "vcd", |
d494a4aa UH |
219 | .description = "Value Change Dump (VCD)", |
220 | .df_type = SR_DF_LOGIC, | |
221 | .init = init, | |
222 | .data = data, | |
223 | .event = event, | |
4c9ffa83 | 224 | }; |