2 * This file is part of the sigrok project.
4 * Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de>
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.
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.
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
28 unsigned int num_enabled_probes;
29 unsigned int unitsize;
34 const char *gnuplot_header = "\
35 # Sample data in space-separated columns format usable by gnuplot\n\
37 # Generated by: %s on %s%s\
39 # Column/probe assignment:\n\
40 # Column 0: Sample counter (for internal gnuplot purposes)\n%s\n";
42 const char *gnuplot_header_comment = "\
43 # Comment: Acquisition with %d/%d probes at %s\n";
45 static int init(struct output *o)
47 /* Maximum header length */
48 #define MAX_HEADER_LEN 2048
56 char *c, *samplerate_s;
57 char wbuf[1000], comment[128];
60 if (!(ctx = calloc(1, sizeof(struct context))))
61 return SIGROK_ERR_MALLOC;
64 ctx->num_enabled_probes = 0;
65 for (l = o->device->probes; l; l = l->next) {
68 ctx->probelist[ctx->num_enabled_probes++] = probe->name;
71 ctx->probelist[ctx->num_enabled_probes] = 0;
72 ctx->unitsize = (ctx->num_enabled_probes + 7) / 8;
74 /* TODO: Allow for configuration via o->param. */
76 if (!(ctx->header = calloc(1, MAX_HEADER_LEN + 1))) {
78 return SIGROK_ERR_MALLOC;
81 num_probes = g_slist_length(o->device->probes);
82 /* TODO: Handle num_probes == 0, too many probes, etc. */
85 if (o->device->plugin) {
86 samplerate = *((uint64_t *) o->device->plugin->get_device_info(
87 o->device->plugin_index, DI_CUR_SAMPLERATE));
88 if (!(samplerate_s = sigrok_samplerate_string(samplerate))) {
93 snprintf(comment, 127, gnuplot_header_comment,
94 ctx->num_enabled_probes, num_probes, samplerate_s);
98 /* Columns / channels */
100 for (i = 0; i < ctx->num_enabled_probes; i++) {
101 c = (char *)&wbuf + strlen((char *)&wbuf);
102 sprintf(c, "# Column %d: %s\n", i + 1, ctx->probelist[i]);
105 /* TODO: date: File or signals? Make y/n configurable. */
106 /* TODO: Timescale */
108 b = snprintf(ctx->header, MAX_HEADER_LEN, gnuplot_header,
109 PACKAGE_STRING, ctime(&t), comment, 1, "ns",
112 /* TODO: Handle snprintf errors. */
117 static int event(struct output *o, int event_type, char **data_out,
118 uint64_t *length_out)
123 switch (event_type) {
138 static int data(struct output *o, char *data_in, uint64_t length_in,
139 char **data_out, uint64_t *length_out)
142 unsigned int i, outsize, p, curbit;
143 uint64_t sample, count = 0;
149 outsize = strlen(ctx->header);
151 /* FIXME: Use realloc(). */
152 if (!(outbuf = calloc(1, outsize + 1 + 1000000)))
153 return SIGROK_ERR_MALLOC; /* TODO: free()? What to free? */
157 /* The header is still here, this must be the first packet. */
158 strncpy(outbuf, ctx->header, outsize);
163 /* TODO: Are disabled probes handled correctly? */
165 for (i = 0; i <= length_in - ctx->unitsize; i += ctx->unitsize) {
166 memcpy(&sample, data_in + i, ctx->unitsize);
168 /* The first column is a counter (needed for gnuplot). */
169 c = outbuf + strlen(outbuf);
170 sprintf(c, "%" PRIu64 "\t\t", count++);
172 /* The next columns are the values of all channels. */
173 for (p = 0; p < ctx->num_enabled_probes; p++) {
174 curbit = (sample & ((uint64_t) (1 << p))) != 0;
175 c = outbuf + strlen(outbuf);
176 sprintf(c, "%d ", curbit);
179 c = outbuf + strlen(outbuf);
182 /* TODO: realloc() if strlen(outbuf) is almost "full"... */
186 *length_out = strlen(outbuf);
191 struct output_format output_gnuplot = {