346 lines
8.7 KiB
C
346 lines
8.7 KiB
C
/*
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* This file is part of the sigrok project.
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*
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* Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <stdlib.h>
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#include <string.h>
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#include <glib.h>
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#include <sigrok.h>
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#include "config.h"
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struct context {
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unsigned int num_enabled_probes;
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unsigned int unitsize;
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char *probelist[MAX_NUM_PROBES+1];
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char *header;
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};
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#define MAX_HEADER_LEN 1024 + (MAX_NUM_PROBES * (MAX_PROBENAME_LEN + 10))
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const char *gnuplot_header = "\
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# Sample data in space-separated columns format usable by gnuplot\n\
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#\n\
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# Generated by: %s on %s%s\
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# Period: %s\n\
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#\n\
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# Column\tProbe\n\
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# -------------------------------------\
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----------------------------------------\n\
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# 0\t\tSample counter (for internal gnuplot purposes)\n%s\n";
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const char *gnuplot_header_comment = "\
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# Comment: Acquisition with %d/%d probes at %s\n";
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static int init(struct sr_output *o)
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{
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struct context *ctx;
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struct sr_probe *probe;
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GSList *l;
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uint64_t samplerate;
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unsigned int i;
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int b, num_probes;
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char *c, *frequency_s;
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char wbuf[1000], comment[128];
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time_t t;
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if (!(ctx = calloc(1, sizeof(struct context))))
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return SR_ERR_MALLOC;
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if (!(ctx->header = calloc(1, MAX_HEADER_LEN + 1))) {
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free(ctx);
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return SR_ERR_MALLOC;
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}
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o->internal = ctx;
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ctx->num_enabled_probes = 0;
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for (l = o->device->probes; l; l = l->next) {
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probe = l->data;
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if (!probe->enabled)
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continue;
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ctx->probelist[ctx->num_enabled_probes++] = probe->name;
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}
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ctx->probelist[ctx->num_enabled_probes] = 0;
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ctx->unitsize = (ctx->num_enabled_probes + 7) / 8;
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num_probes = g_slist_length(o->device->probes);
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comment[0] = '\0';
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if (o->device->plugin && device_has_hwcap(o->device, SR_HWCAP_SAMPLERATE)) {
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samplerate = *((uint64_t *) o->device->plugin->get_device_info(
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o->device->plugin_index, SR_DI_CUR_SAMPLERATE));
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if (!(frequency_s = sr_samplerate_string(samplerate))) {
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free(ctx->header);
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free(ctx);
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return SR_ERR;
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}
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snprintf(comment, 127, gnuplot_header_comment,
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ctx->num_enabled_probes, num_probes, frequency_s);
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free(frequency_s);
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}
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/* Columns / channels */
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wbuf[0] = '\0';
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for (i = 0; i < ctx->num_enabled_probes; i++) {
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c = (char *)&wbuf + strlen((char *)&wbuf);
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sprintf(c, "# %d\t\t%s\n", i + 1, ctx->probelist[i]);
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}
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if (!(frequency_s = sr_period_string(samplerate))) {
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free(ctx->header);
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free(ctx);
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return SR_ERR;
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}
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t = time(NULL);
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b = snprintf(ctx->header, MAX_HEADER_LEN, gnuplot_header,
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PACKAGE_STRING, ctime(&t), comment, frequency_s,
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(char *)&wbuf);
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free(frequency_s);
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if (b < 0) {
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free(ctx->header);
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free(ctx);
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return SR_ERR;
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}
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return 0;
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}
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static int event(struct sr_output *o, int event_type, char **data_out,
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uint64_t *length_out)
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{
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struct context *ctx;
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ctx = o->internal;
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switch (event_type) {
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case SR_DF_TRIGGER:
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/* TODO: can a trigger mark be in a gnuplot data file? */
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break;
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case SR_DF_END:
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free(o->internal);
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o->internal = NULL;
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break;
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}
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*data_out = NULL;
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*length_out = 0;
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return SR_OK;
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}
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static int data(struct sr_output *o, char *data_in, uint64_t length_in,
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char **data_out, uint64_t *length_out)
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{
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struct context *ctx;
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unsigned int max_linelen, outsize, p, curbit, i;
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uint64_t sample;
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static uint64_t samplecount = 0;
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char *outbuf, *c;
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ctx = o->internal;
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max_linelen = 16 + ctx->num_enabled_probes * 2;
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outsize = length_in / ctx->unitsize * max_linelen;
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if (ctx->header)
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outsize += strlen(ctx->header);
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if (!(outbuf = calloc(1, outsize)))
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return SR_ERR_MALLOC;
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outbuf[0] = '\0';
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if (ctx->header) {
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/* The header is still here, this must be the first packet. */
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strncpy(outbuf, ctx->header, outsize);
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free(ctx->header);
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ctx->header = NULL;
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}
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for (i = 0; i <= length_in - ctx->unitsize; i += ctx->unitsize) {
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memcpy(&sample, data_in + i, ctx->unitsize);
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/* The first column is a counter (needed for gnuplot). */
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c = outbuf + strlen(outbuf);
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sprintf(c, "%" PRIu64 "\t", samplecount++);
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/* The next columns are the values of all channels. */
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for (p = 0; p < ctx->num_enabled_probes; p++) {
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curbit = (sample & ((uint64_t) (1 << p))) >> p;
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c = outbuf + strlen(outbuf);
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sprintf(c, "%d ", curbit);
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}
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c = outbuf + strlen(outbuf);
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sprintf(c, "\n");
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}
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*data_out = outbuf;
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*length_out = strlen(outbuf);
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return SR_OK;
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}
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static int analog_init(struct sr_output *o)
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{
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struct context *ctx;
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struct sr_probe *probe;
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GSList *l;
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uint64_t samplerate;
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unsigned int i;
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int b, num_probes;
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char *c, *frequency_s;
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char wbuf[1000], comment[128];
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time_t t;
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if (!(ctx = calloc(1, sizeof(struct context))))
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return SR_ERR_MALLOC;
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if (!(ctx->header = calloc(1, MAX_HEADER_LEN + 1))) {
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free(ctx);
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return SR_ERR_MALLOC;
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}
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o->internal = ctx;
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ctx->num_enabled_probes = 0;
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for (l = o->device->probes; l; l = l->next) {
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probe = l->data;
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if (!probe->enabled)
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continue;
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ctx->probelist[ctx->num_enabled_probes++] = probe->name;
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}
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ctx->probelist[ctx->num_enabled_probes] = 0;
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// ctx->unitsize = (ctx->num_enabled_probes + 7) / 8;
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ctx->unitsize = sizeof(struct analog_sample) +
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(ctx->num_enabled_probes * sizeof(struct analog_probe));
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num_probes = g_slist_length(o->device->probes);
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comment[0] = '\0';
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if (o->device->plugin && device_has_hwcap(o->device, SR_HWCAP_SAMPLERATE)) {
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samplerate = *((uint64_t *) o->device->plugin->get_device_info(
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o->device->plugin_index, SR_DI_CUR_SAMPLERATE));
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if (!(frequency_s = sr_samplerate_string(samplerate))) {
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free(ctx->header);
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free(ctx);
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return SR_ERR;
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}
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snprintf(comment, 127, gnuplot_header_comment,
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ctx->num_enabled_probes, num_probes, frequency_s);
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free(frequency_s);
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}
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/* Columns / channels */
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wbuf[0] = '\0';
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for (i = 0; i < ctx->num_enabled_probes; i++) {
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c = (char *)&wbuf + strlen((char *)&wbuf);
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sprintf(c, "# %d\t\t%s\n", i + 1, ctx->probelist[i]);
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}
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if (!(frequency_s = sr_period_string(samplerate))) {
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free(ctx->header);
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free(ctx);
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return SR_ERR;
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}
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t = time(NULL);
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b = snprintf(ctx->header, MAX_HEADER_LEN, gnuplot_header,
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PACKAGE_STRING, ctime(&t), comment, frequency_s,
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(char *)&wbuf);
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free(frequency_s);
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if (b < 0) {
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free(ctx->header);
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free(ctx);
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return SR_ERR;
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}
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return 0;
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}
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static int analog_data(struct sr_output *o, char *data_in, uint64_t length_in,
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char **data_out, uint64_t *length_out)
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{
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struct context *ctx;
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unsigned int max_linelen, outsize, p, /* curbit, */ i;
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// uint64_t sample;
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static uint64_t samplecount = 0;
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char *outbuf, *c;
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struct analog_sample *sample;
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ctx = o->internal;
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// max_linelen = 16 + ctx->num_enabled_probes * 2;
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max_linelen = 16 + ctx->num_enabled_probes * 30;
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outsize = length_in / ctx->unitsize * max_linelen;
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if (ctx->header)
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outsize += strlen(ctx->header);
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if (!(outbuf = calloc(1, outsize)))
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return SR_ERR_MALLOC;
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outbuf[0] = '\0';
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if (ctx->header) {
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/* The header is still here, this must be the first packet. */
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strncpy(outbuf, ctx->header, outsize);
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free(ctx->header);
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ctx->header = NULL;
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}
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for (i = 0; i <= length_in - ctx->unitsize; i += ctx->unitsize) {
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// memcpy(&sample, data_in + i, ctx->unitsize);
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sample = (struct analog_sample *) (data_in + i);
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/* The first column is a counter (needed for gnuplot). */
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c = outbuf + strlen(outbuf);
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sprintf(c, "%" PRIu64 "\t", samplecount++);
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/* The next columns are the values of all channels. */
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for (p = 0; p < ctx->num_enabled_probes; p++) {
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// curbit = (sample & ((uint64_t) (1 << p))) >> p;
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c = outbuf + strlen(outbuf);
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// sprintf(c, "%d ", curbit);
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/*
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* FIXME: Should be doing proper raw->voltage conversion
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* here, casting to int16_t isn't it. Remember that if
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* res = 1 conversion isn't necessary.
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*/
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sprintf(c, "%f ", (double) ((int16_t) (sample->probes[p].val &
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((1 << sample->probes[p].res) - 1))));
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}
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c = outbuf + strlen(outbuf);
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sprintf(c, "\n");
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}
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*data_out = outbuf;
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*length_out = strlen(outbuf);
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return SR_OK;
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}
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struct sr_output_format output_gnuplot = {
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"gnuplot",
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"Gnuplot",
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SR_DF_LOGIC,
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init,
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data,
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event,
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};
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struct sr_output_format output_analog_gnuplot = {
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"analog_gnuplot",
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"Gnuplot analog",
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SR_DF_ANALOG,
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analog_init,
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analog_data,
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event,
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};
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