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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; | |
33 | char *data; | |
34 | }; | |
35 | ||
36 | const char *vcd_header = "\ | |
37 | $date\n %s\n$end\n\ | |
38 | $version\n %s\n$end\n\ | |
39 | $comment\n Acquisition with %d/%d probes at %s\n$end\n\ | |
40 | $timescale\n %i %s\n$end\n\ | |
41 | $scope module %s $end\n\ | |
42 | %s\ | |
43 | $upscope $end\n\ | |
44 | $enddefinitions $end\n\ | |
45 | $dumpvars\n"; | |
46 | ||
47 | static void init(struct output *o) | |
48 | { | |
49 | /* Maximum header length */ | |
50 | #define MAX_HEADER_LEN 2048 | |
51 | ||
52 | struct context *ctx; | |
53 | struct probe *probe; | |
54 | GSList *l; | |
55 | uint64_t samplerate; | |
56 | int i, b, num_probes; | |
57 | char *c; | |
58 | char sbuf[10], wbuf[1000]; | |
59 | ||
60 | ctx = malloc(sizeof(struct context)); | |
61 | o->internal = ctx; | |
62 | ctx->num_enabled_probes = 0; | |
63 | for (l = o->device->probes; l; l = l->next) { | |
64 | probe = l->data; | |
65 | if (probe->enabled) | |
66 | ctx->probelist[ctx->num_enabled_probes++] = probe->name; | |
67 | } | |
68 | ||
69 | ctx->probelist[ctx->num_enabled_probes] = 0; | |
70 | ctx->unitsize = (ctx->num_enabled_probes + 7) / 8; | |
71 | ||
72 | /* TODO: Allow for configuration via o->param. */ | |
73 | ||
74 | ctx->header = calloc(1, MAX_HEADER_LEN + 1); | |
75 | num_probes = g_slist_length(o->device->probes); | |
76 | samplerate = *((uint64_t *) o->device->plugin->get_device_info( | |
4c100f32 | 77 | o->device->plugin_index, DI_CUR_SAMPLERATE)); |
4c9ffa83 UH |
78 | |
79 | /* Samplerate string */ | |
80 | if (samplerate >= GHZ(1)) | |
81 | snprintf(sbuf, 10, "%"PRIu64" GHz", samplerate / 1000000000); | |
82 | else if (samplerate >= MHZ(1)) | |
83 | snprintf(sbuf, 10, "%"PRIu64" MHz", samplerate / 1000000); | |
84 | else if (samplerate >= KHZ(1)) | |
85 | snprintf(sbuf, 10, "%"PRIu64" KHz", samplerate / 1000); | |
86 | else | |
87 | snprintf(sbuf, 10, "%"PRIu64" Hz", samplerate); | |
88 | ||
89 | /* Wires / channels */ | |
90 | wbuf[0] = '\0'; | |
91 | for (i = 0; i < num_probes; i++) { | |
92 | c = (char *)&wbuf + strlen((char *)&wbuf); | |
93 | sprintf(c, "$var wire 1 %c channel%i $end\n", | |
94 | (char)('!' + i), i); | |
95 | } | |
96 | ||
97 | /* TODO: date: File or signals? Make y/n configurable. */ | |
98 | b = snprintf(ctx->header, MAX_HEADER_LEN, vcd_header, "TODO: Date", | |
99 | PACKAGE_STRING, ctx->num_enabled_probes, num_probes, | |
100 | (char *)&sbuf, 1, "ns", PACKAGE, (char *)&wbuf); | |
101 | ||
102 | ctx->prevbits = calloc(sizeof(int), num_probes); | |
103 | } | |
104 | ||
105 | static int event(struct output *o, int event_type, char **data_out, | |
106 | uint64_t *length_out) | |
107 | { | |
108 | struct context *ctx; | |
109 | char *outbuf; | |
110 | int outlen; | |
111 | ||
112 | ctx = o->internal; | |
113 | switch(event_type) { | |
114 | case DF_TRIGGER: | |
115 | break; | |
116 | case DF_END: | |
117 | outlen = strlen("$dumpoff\n$end\n"); | |
118 | outbuf = malloc(outlen + 1); | |
119 | snprintf(outbuf, outlen, "$dumpoff\n$end\n"); | |
120 | *data_out = outbuf; | |
121 | *length_out = outlen; | |
122 | free(o->internal); | |
123 | o->internal = NULL; | |
124 | break; | |
125 | } | |
126 | ||
127 | return SIGROK_OK; | |
128 | } | |
129 | ||
130 | static int data(struct output *o, char *data_in, uint64_t length_in, | |
131 | char **data_out, uint64_t *length_out) | |
132 | { | |
133 | struct context *ctx; | |
134 | int offset, outsize, p, curbit, prevbit; | |
135 | uint64_t sample, prevsample; | |
136 | char *outbuf, *c; | |
137 | ||
138 | ctx = o->internal; | |
139 | outsize = strlen(ctx->header); | |
140 | outbuf = calloc(1, outsize + 1 + 10000); // FIXME: Use realloc(). | |
141 | if (ctx->header) { | |
142 | /* The header is still here, this must be the first packet. */ | |
143 | strncpy(outbuf, ctx->header, outsize); | |
144 | free(ctx->header); | |
145 | ctx->header = NULL; | |
146 | } else { | |
147 | outbuf[0] = 0; | |
148 | } | |
149 | ||
150 | /* TODO: Are disabled probes handled correctly? */ | |
151 | ||
152 | for (offset = 0; offset <= length_in - ctx->unitsize; | |
153 | offset += ctx->unitsize) { | |
154 | memcpy(&sample, data_in + offset, ctx->unitsize); | |
155 | for (p = 0; p < ctx->num_enabled_probes; p++) { | |
156 | curbit = (sample & ((uint64_t) (1 << p))) != 0; | |
157 | if (offset == 0) { | |
158 | prevbit = ~curbit; | |
159 | } else { | |
160 | memcpy(&prevsample, data_in + offset - 1, ctx->unitsize); | |
161 | prevbit = (prevsample & ((uint64_t) (1 << p))) != 0; | |
162 | } | |
163 | ||
164 | if (prevbit != curbit) { | |
165 | /* FIXME: Only once per sample? */ | |
166 | c = outbuf + strlen(outbuf); | |
167 | sprintf(c, "#%i\n", offset * 1 /* TODO */); | |
168 | ||
169 | c = outbuf + strlen(outbuf); | |
170 | sprintf(c, "%i%c\n", curbit, (char)('!' + p /* FIXME? */)); | |
171 | } | |
172 | } | |
173 | ||
174 | /* TODO: Do a realloc() here if strlen(outbuf) is almost "full"... */ | |
175 | } | |
176 | ||
177 | *data_out = outbuf; | |
178 | *length_out = strlen(outbuf); | |
179 | ||
180 | return SIGROK_OK; | |
181 | } | |
182 | ||
183 | struct output_format output_vcd = { | |
184 | "vcd", | |
185 | "Value Change Dump (VCD)", | |
186 | init, | |
187 | data, | |
188 | event, | |
189 | }; |