--- /dev/null
+/*
+ * This file is part of the sigrok project.
+ *
+ * Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <glib.h>
+#include <sigrok.h>
+#include "config.h"
+
+struct context {
+ int num_enabled_probes;
+ int unitsize;
+ char *probelist[65];
+ char *header;
+};
+
+const char *gnuplot_header = "\
+# Sample data in space-separated columns format usable by gnuplot\n\
+#\n\
+# Generated by: %s on %s\n\
+# Comment: Acquisition with %d/%d probes at %s\n\
+# Timescale: %d %s\n\
+# Column assignment:\n%s\n";
+
+static int init(struct output *o)
+{
+/* Maximum header length */
+#define MAX_HEADER_LEN 2048
+
+ struct context *ctx;
+ struct probe *probe;
+ GSList *l;
+ uint64_t samplerate;
+ int i, b, num_probes;
+ char *c;
+ char sbuf[10], wbuf[1000];
+
+ ctx = malloc(sizeof(struct context));
+ if (ctx == NULL)
+ return SIGROK_ERR_MALLOC;
+ o->internal = ctx;
+ ctx->num_enabled_probes = 0;
+ for (l = o->device->probes; l; l = l->next) {
+ probe = l->data;
+ if (probe->enabled)
+ ctx->probelist[ctx->num_enabled_probes++] = probe->name;
+ }
+
+ ctx->probelist[ctx->num_enabled_probes] = 0;
+ ctx->unitsize = (ctx->num_enabled_probes + 7) / 8;
+
+ /* TODO: Allow for configuration via o->param. */
+
+ ctx->header = calloc(1, MAX_HEADER_LEN + 1);
+ if (ctx->header == NULL)
+ return SIGROK_ERR_MALLOC;
+ num_probes = g_slist_length(o->device->probes);
+ /* TODO: Handle num_probes == 0, too many probes, etc. */
+ samplerate = *((uint64_t *) o->device->plugin->get_device_info(
+ o->device->plugin_index, DI_CUR_SAMPLERATE));
+
+ /* Samplerate string */
+ if (samplerate >= GHZ(1))
+ snprintf(sbuf, 10, "%"PRIu64" GHz", samplerate / 1000000000);
+ else if (samplerate >= MHZ(1))
+ snprintf(sbuf, 10, "%"PRIu64" MHz", samplerate / 1000000);
+ else if (samplerate >= KHZ(1))
+ snprintf(sbuf, 10, "%"PRIu64" KHz", samplerate / 1000);
+ else
+ snprintf(sbuf, 10, "%"PRIu64" Hz", samplerate);
+
+ /* Columns / channels */
+ wbuf[0] = '\0';
+ for (i = 0; i < ctx->num_enabled_probes; i++) {
+ c = (char *)&wbuf + strlen((char *)&wbuf);
+ sprintf(c, "# Column %d: channel %s\n", i, ctx->probelist[i]);
+ }
+
+ /* TODO: date: File or signals? Make y/n configurable. */
+ /* TODO: Timescale */
+ b = snprintf(ctx->header, MAX_HEADER_LEN, gnuplot_header,
+ PACKAGE_STRING, "TODO", ctx->num_enabled_probes,
+ num_probes, (char *)&sbuf, 1, "ns", (char *)&wbuf);
+
+ /* TODO: Handle snprintf errors. */
+
+ return 0;
+}
+
+static int event(struct output *o, int event_type, char **data_out,
+ uint64_t *length_out)
+{
+ struct context *ctx;
+ char *outbuf;
+ int outlen = 1; /* FIXME */
+
+ ctx = o->internal;
+ switch(event_type) {
+ case DF_TRIGGER:
+ break;
+ case DF_END:
+ outbuf = calloc(1, 1); // FIXME
+ if (outbuf == NULL)
+ return SIGROK_ERR_MALLOC;
+ *data_out = outbuf;
+ *length_out = outlen;
+ free(o->internal);
+ o->internal = NULL;
+ break;
+ }
+
+ return SIGROK_OK;
+}
+
+static int data(struct output *o, char *data_in, uint64_t length_in,
+ char **data_out, uint64_t *length_out)
+{
+ struct context *ctx;
+ int offset, outsize, p, curbit;
+ uint64_t sample, count = 0;
+ char *outbuf, *c;
+
+ ctx = o->internal;
+ outsize = strlen(ctx->header);
+ outbuf = calloc(1, outsize + 1 + 10000); // FIXME: Use realloc().
+ if (outbuf == NULL)
+ return SIGROK_ERR_MALLOC;
+ if (ctx->header) {
+ /* The header is still here, this must be the first packet. */
+ strncpy(outbuf, ctx->header, outsize);
+ free(ctx->header);
+ ctx->header = NULL;
+ } else {
+ outbuf[0] = 0;
+ }
+
+ /* TODO: Are disabled probes handled correctly? */
+
+ for (offset = 0; offset <= length_in - ctx->unitsize;
+ offset += ctx->unitsize) {
+ memcpy(&sample, data_in + offset, ctx->unitsize);
+
+ /* The first column is a counter (needed for gnuplot). */
+ c = outbuf + strlen(outbuf);
+ sprintf(c, "%"PRIu64"\t\t", count++);
+
+ /* The next columns are the values of all channels. */
+ for (p = 0; p < ctx->num_enabled_probes; p++) {
+ curbit = (sample & ((uint64_t) (1 << p))) != 0;
+ c = outbuf + strlen(outbuf);
+ sprintf(c, "%d ", curbit);
+ }
+
+ c = outbuf + strlen(outbuf);
+ sprintf(c, "\n");
+
+ /* TODO: realloc() if strlen(outbuf) is almost "full"... */
+ }
+
+ *data_out = outbuf;
+ *length_out = strlen(outbuf);
+
+ return SIGROK_OK;
+}
+
+struct output_format output_gnuplot = {
+ "gnuplot",
+ "Gnuplot",
+ init,
+ data,
+ event,
+};
projects / libsigrok.git / commitdiff