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\
41 # -------------------------------------\
42 ----------------------------------------\n\
43 # 0\t\tSample counter (for internal gnuplot purposes)\n%s\n";
45 const char *gnuplot_header_comment = "\
46 # Comment: Acquisition with %d/%d probes at %s\n";
48 static int init(struct output *o)
50 /* Maximum header length */
51 #define MAX_HEADER_LEN 2048
59 char *c, *samplerate_s;
60 char wbuf[1000], comment[128];
63 if (!(ctx = calloc(1, sizeof(struct context))))
64 return SIGROK_ERR_MALLOC;
67 ctx->num_enabled_probes = 0;
68 for (l = o->device->probes; l; l = l->next) {
71 ctx->probelist[ctx->num_enabled_probes++] = probe->name;
74 ctx->probelist[ctx->num_enabled_probes] = 0;
75 ctx->unitsize = (ctx->num_enabled_probes + 7) / 8;
77 /* TODO: Allow for configuration via o->param. */
79 if (!(ctx->header = calloc(1, MAX_HEADER_LEN + 1))) {
81 return SIGROK_ERR_MALLOC;
84 num_probes = g_slist_length(o->device->probes);
85 /* TODO: Handle num_probes == 0, too many probes, etc. */
88 if (o->device->plugin) {
89 samplerate = *((uint64_t *) o->device->plugin->get_device_info(
90 o->device->plugin_index, DI_CUR_SAMPLERATE));
91 if (!(samplerate_s = sigrok_samplerate_string(samplerate))) {
96 snprintf(comment, 127, gnuplot_header_comment,
97 ctx->num_enabled_probes, num_probes, samplerate_s);
101 /* Columns / channels */
103 for (i = 0; i < ctx->num_enabled_probes; i++) {
104 c = (char *)&wbuf + strlen((char *)&wbuf);
105 sprintf(c, "# %d\t\t%s\n", i + 1, ctx->probelist[i]);
108 /* TODO: date: File or signals? Make y/n configurable. */
109 /* TODO: Timescale */
111 b = snprintf(ctx->header, MAX_HEADER_LEN, gnuplot_header,
112 PACKAGE_STRING, ctime(&t), comment, 1, "ns",
115 /* TODO: Handle snprintf errors. */
120 static int event(struct output *o, int event_type, char **data_out,
121 uint64_t *length_out)
126 switch (event_type) {
141 static int data(struct output *o, char *data_in, uint64_t length_in,
142 char **data_out, uint64_t *length_out)
145 unsigned int i, outsize, p, curbit;
147 static uint64_t samplecount = 0;
153 outsize = strlen(ctx->header);
155 /* FIXME: Use realloc(). */
156 if (!(outbuf = calloc(1, outsize + 1 + 1000000)))
157 return SIGROK_ERR_MALLOC; /* TODO: free()? What to free? */
161 /* The header is still here, this must be the first packet. */
162 strncpy(outbuf, ctx->header, outsize);
167 /* TODO: Are disabled probes handled correctly? */
169 for (i = 0; i <= length_in - ctx->unitsize; i += ctx->unitsize) {
170 memcpy(&sample, data_in + i, ctx->unitsize);
172 /* The first column is a counter (needed for gnuplot). */
173 c = outbuf + strlen(outbuf);
174 sprintf(c, "%" PRIu64 "\t\t", samplecount++);
176 /* The next columns are the values of all channels. */
177 for (p = 0; p < ctx->num_enabled_probes; p++) {
178 curbit = (sample & ((uint64_t) (1 << p))) != 0;
179 c = outbuf + strlen(outbuf);
180 sprintf(c, "%d ", curbit);
183 c = outbuf + strlen(outbuf);
186 /* TODO: realloc() if strlen(outbuf) is almost "full"... */
190 *length_out = strlen(outbuf);
195 struct output_format output_gnuplot = {