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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> | |
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 <string.h> | |
23 | #include <glib.h> | |
24 | #include <sigrok.h> | |
25 | #include "config.h" | |
26 | ||
27 | struct context { | |
28 | int num_enabled_probes; | |
29 | int unitsize; | |
30 | char *probelist[65]; | |
31 | int *prevbits; | |
32 | char *header; | |
4c9ffa83 UH |
33 | }; |
34 | ||
35 | const char *vcd_header = "\ | |
36 | $date\n %s\n$end\n\ | |
37 | $version\n %s\n$end\n\ | |
38 | $comment\n Acquisition with %d/%d probes at %s\n$end\n\ | |
39 | $timescale\n %i %s\n$end\n\ | |
40 | $scope module %s $end\n\ | |
41 | %s\ | |
42 | $upscope $end\n\ | |
43 | $enddefinitions $end\n\ | |
44 | $dumpvars\n"; | |
45 | ||
5a8fda15 | 46 | static int init(struct output *o) |
4c9ffa83 UH |
47 | { |
48 | /* Maximum header length */ | |
49 | #define MAX_HEADER_LEN 2048 | |
50 | ||
51 | struct context *ctx; | |
52 | struct probe *probe; | |
53 | GSList *l; | |
54 | uint64_t samplerate; | |
55 | int i, b, num_probes; | |
25e7d9b1 UH |
56 | char *c, *samplerate_s; |
57 | char wbuf[1000]; | |
4c9ffa83 UH |
58 | |
59 | ctx = malloc(sizeof(struct context)); | |
e31b636d UH |
60 | if (ctx == NULL) |
61 | return SIGROK_ERR_MALLOC; | |
4c9ffa83 UH |
62 | o->internal = ctx; |
63 | ctx->num_enabled_probes = 0; | |
64 | for (l = o->device->probes; l; l = l->next) { | |
65 | probe = l->data; | |
66 | if (probe->enabled) | |
67 | ctx->probelist[ctx->num_enabled_probes++] = probe->name; | |
68 | } | |
69 | ||
70 | ctx->probelist[ctx->num_enabled_probes] = 0; | |
71 | ctx->unitsize = (ctx->num_enabled_probes + 7) / 8; | |
72 | ||
73 | /* TODO: Allow for configuration via o->param. */ | |
74 | ||
75 | ctx->header = calloc(1, MAX_HEADER_LEN + 1); | |
e31b636d UH |
76 | if (ctx->header == NULL) |
77 | return SIGROK_ERR_MALLOC; | |
4c9ffa83 | 78 | num_probes = g_slist_length(o->device->probes); |
e31b636d | 79 | /* TODO: Handle num_probes == 0, too many probes, etc. */ |
4c9ffa83 | 80 | samplerate = *((uint64_t *) o->device->plugin->get_device_info( |
4c100f32 | 81 | o->device->plugin_index, DI_CUR_SAMPLERATE)); |
4c9ffa83 | 82 | |
25e7d9b1 | 83 | if ((samplerate_s = sigrok_samplerate_string(samplerate)) == NULL) |
99c1fc59 | 84 | return -1; /* FIXME */ |
4c9ffa83 UH |
85 | |
86 | /* Wires / channels */ | |
87 | wbuf[0] = '\0'; | |
bc010c05 | 88 | for (i = 0; i < ctx->num_enabled_probes; i++) { |
4c9ffa83 | 89 | c = (char *)&wbuf + strlen((char *)&wbuf); |
bc010c05 | 90 | sprintf(c, "$var wire 1 %c channel%s $end\n", |
99c1fc59 | 91 | (char)('!' + i), ctx->probelist[i]); |
4c9ffa83 UH |
92 | } |
93 | ||
99c1fc59 | 94 | /* TODO: Date: File or signals? Make y/n configurable. */ |
4c9ffa83 UH |
95 | b = snprintf(ctx->header, MAX_HEADER_LEN, vcd_header, "TODO: Date", |
96 | PACKAGE_STRING, ctx->num_enabled_probes, num_probes, | |
25e7d9b1 | 97 | samplerate_s, 1, "ns", PACKAGE, (char *)&wbuf); |
e31b636d | 98 | /* TODO: Handle snprintf errors. */ |
4c9ffa83 | 99 | |
25e7d9b1 UH |
100 | free(samplerate_s); |
101 | ||
4c9ffa83 | 102 | ctx->prevbits = calloc(sizeof(int), num_probes); |
e31b636d UH |
103 | if (ctx->prevbits == NULL) |
104 | return SIGROK_ERR_MALLOC; | |
5a8fda15 UH |
105 | |
106 | return 0; | |
4c9ffa83 UH |
107 | } |
108 | ||
109 | static int event(struct output *o, int event_type, char **data_out, | |
110 | uint64_t *length_out) | |
111 | { | |
112 | struct context *ctx; | |
113 | char *outbuf; | |
114 | int outlen; | |
115 | ||
116 | ctx = o->internal; | |
99c1fc59 | 117 | switch (event_type) { |
4c9ffa83 UH |
118 | case DF_TRIGGER: |
119 | break; | |
120 | case DF_END: | |
121 | outlen = strlen("$dumpoff\n$end\n"); | |
122 | outbuf = malloc(outlen + 1); | |
e31b636d UH |
123 | if (outbuf == NULL) |
124 | return SIGROK_ERR_MALLOC; | |
bc010c05 | 125 | snprintf(outbuf, outlen + 1, "$dumpoff\n$end\n"); |
4c9ffa83 UH |
126 | *data_out = outbuf; |
127 | *length_out = outlen; | |
128 | free(o->internal); | |
129 | o->internal = NULL; | |
130 | break; | |
131 | } | |
132 | ||
133 | return SIGROK_OK; | |
134 | } | |
135 | ||
136 | static int data(struct output *o, char *data_in, uint64_t length_in, | |
137 | char **data_out, uint64_t *length_out) | |
138 | { | |
139 | struct context *ctx; | |
afc8e4de UH |
140 | unsigned int offset, outsize; |
141 | int p, curbit, prevbit; | |
4c9ffa83 UH |
142 | uint64_t sample, prevsample; |
143 | char *outbuf, *c; | |
144 | ||
145 | ctx = o->internal; | |
146 | outsize = strlen(ctx->header); | |
99c1fc59 | 147 | outbuf = calloc(1, outsize + 1 + 10000); /* FIXME: Use realloc(). */ |
e31b636d UH |
148 | if (outbuf == NULL) |
149 | return SIGROK_ERR_MALLOC; | |
4c9ffa83 UH |
150 | if (ctx->header) { |
151 | /* The header is still here, this must be the first packet. */ | |
152 | strncpy(outbuf, ctx->header, outsize); | |
153 | free(ctx->header); | |
154 | ctx->header = NULL; | |
155 | } else { | |
156 | outbuf[0] = 0; | |
157 | } | |
158 | ||
159 | /* TODO: Are disabled probes handled correctly? */ | |
160 | ||
161 | for (offset = 0; offset <= length_in - ctx->unitsize; | |
99c1fc59 | 162 | offset += ctx->unitsize) { |
4c9ffa83 UH |
163 | memcpy(&sample, data_in + offset, ctx->unitsize); |
164 | for (p = 0; p < ctx->num_enabled_probes; p++) { | |
165 | curbit = (sample & ((uint64_t) (1 << p))) != 0; | |
166 | if (offset == 0) { | |
167 | prevbit = ~curbit; | |
168 | } else { | |
99c1fc59 UH |
169 | memcpy(&prevsample, data_in + offset - 1, |
170 | ctx->unitsize); | |
171 | prevbit = | |
172 | (prevsample & ((uint64_t) (1 << p))) != 0; | |
4c9ffa83 UH |
173 | } |
174 | ||
175 | if (prevbit != curbit) { | |
176 | /* FIXME: Only once per sample? */ | |
177 | c = outbuf + strlen(outbuf); | |
178 | sprintf(c, "#%i\n", offset * 1 /* TODO */); | |
179 | ||
180 | c = outbuf + strlen(outbuf); | |
99c1fc59 UH |
181 | sprintf(c, "%i%c\n", curbit, |
182 | (char)('!' + p /* FIXME? */)); | |
4c9ffa83 UH |
183 | } |
184 | } | |
185 | ||
99c1fc59 | 186 | /* TODO: Use realloc() if strlen(outbuf) is almost "full"... */ |
4c9ffa83 UH |
187 | } |
188 | ||
189 | *data_out = outbuf; | |
190 | *length_out = strlen(outbuf); | |
191 | ||
192 | return SIGROK_OK; | |
193 | } | |
194 | ||
195 | struct output_format output_vcd = { | |
196 | "vcd", | |
197 | "Value Change Dump (VCD)", | |
198 | init, | |
199 | data, | |
200 | event, | |
201 | }; |