+++ /dev/null
-/*
- * This file is part of the sigrok project.
- *
- * Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de>
- * Copyright (C) 2011 Bert Vermeulen <bert@biot.com>
- *
- * 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 "sigrok-internal.h"
-#include "config.h"
-
-struct context {
- int num_enabled_probes;
- int unitsize;
- char *probelist[65];
- int *prevbits;
- GString *header;
- uint64_t prevsample;
- int period;
- uint64_t samplerate;
-};
-
-static const char *vcd_header_comment = "\
-$comment\n Acquisition with %d/%d probes at %s\n$end\n";
-
-static int init(struct sr_output *o)
-{
- struct context *ctx;
- struct sr_probe *probe;
- GSList *l;
- int num_probes, i;
- char *samplerate_s, *frequency_s, *timestamp;
- time_t t;
-
- if (!(ctx = calloc(1, sizeof(struct context))))
- return SR_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)
- continue;
- ctx->probelist[ctx->num_enabled_probes++] = probe->name;
- }
- if (ctx->num_enabled_probes > 94) {
- sr_warn("VCD only supports 94 probes.");
- return SR_ERR;
- }
-
- ctx->probelist[ctx->num_enabled_probes] = 0;
- ctx->unitsize = (ctx->num_enabled_probes + 7) / 8;
- ctx->header = g_string_sized_new(512);
- num_probes = g_slist_length(o->device->probes);
-
- /* timestamp */
- t = time(NULL);
- timestamp = strdup(ctime(&t));
- timestamp[strlen(timestamp)-1] = 0;
- g_string_printf(ctx->header, "$date %s $end\n", timestamp);
- free(timestamp);
-
- /* generator */
- g_string_append_printf(ctx->header, "$version %s %s $end\n",
- PACKAGE, PACKAGE_VERSION);
-
- if (o->device->plugin && sr_device_has_hwcap(o->device, SR_HWCAP_SAMPLERATE)) {
- ctx->samplerate = *((uint64_t *) o->device->plugin->get_device_info(
- o->device->plugin_index, SR_DI_CUR_SAMPLERATE));
- if (!((samplerate_s = sr_samplerate_string(ctx->samplerate)))) {
- g_string_free(ctx->header, TRUE);
- free(ctx);
- return SR_ERR;
- }
- g_string_append_printf(ctx->header, vcd_header_comment,
- ctx->num_enabled_probes, num_probes, samplerate_s);
- free(samplerate_s);
- }
-
- /* timescale */
- /* VCD can only handle 1/10/100 (s - fs), so scale up first */
- if (ctx->samplerate > SR_MHZ(1))
- ctx->period = SR_GHZ(1);
- else if (ctx->samplerate > SR_KHZ(1))
- ctx->period = SR_MHZ(1);
- else
- ctx->period = SR_KHZ(1);
- if (!(frequency_s = sr_period_string(ctx->period))) {
- g_string_free(ctx->header, TRUE);
- free(ctx);
- return SR_ERR;
- }
- g_string_append_printf(ctx->header, "$timescale %s $end\n", frequency_s);
- free(frequency_s);
-
- /* scope */
- g_string_append_printf(ctx->header, "$scope module %s $end\n", PACKAGE);
-
- /* Wires / channels */
- for (i = 0; i < ctx->num_enabled_probes; i++) {
- g_string_append_printf(ctx->header, "$var wire 1 %c %s $end\n",
- (char)('!' + i), ctx->probelist[i]);
- }
-
- g_string_append(ctx->header, "$upscope $end\n"
- "$enddefinitions $end\n$dumpvars\n");
-
- if (!(ctx->prevbits = calloc(sizeof(int), num_probes))) {
- g_string_free(ctx->header, TRUE);
- free(ctx);
- return SR_ERR_MALLOC;
- }
-
- return SR_OK;
-}
-
-static int event(struct sr_output *o, int event_type, char **data_out,
- uint64_t *length_out)
-{
- struct context *ctx;
- char *outbuf;
-
- ctx = o->internal;
- switch (event_type) {
- case SR_DF_END:
- outbuf = strdup("$dumpoff\n$end\n");
- *data_out = outbuf;
- *length_out = strlen(outbuf);
- free(o->internal);
- o->internal = NULL;
- break;
- default:
- *data_out = NULL;
- *length_out = 0;
- break;
- }
-
- return SR_OK;
-}
-
-static int data(struct sr_output *o, const char *data_in, uint64_t length_in,
- char **data_out, uint64_t *length_out)
-{
- struct context *ctx;
- unsigned int i;
- int p, curbit, prevbit;
- uint64_t sample;
- static uint64_t samplecount = 0;
- GString *out;
- int first_sample = 0;
-
- ctx = o->internal;
- out = g_string_sized_new(512);
-
- if (ctx->header) {
- /* The header is still here, this must be the first packet. */
- g_string_append(out, ctx->header->str);
- g_string_free(ctx->header, TRUE);
- ctx->header = NULL;
- first_sample = 1;
- }
-
- for (i = 0; i <= length_in - ctx->unitsize; i += ctx->unitsize) {
- samplecount++;
-
- memcpy(&sample, data_in + i, ctx->unitsize);
-
- if (first_sample) {
- /* First packet. We neg to make sure sample is stored. */
- ctx->prevsample = ~sample;
- first_sample = 0;
- }
-
- for (p = 0; p < ctx->num_enabled_probes; p++) {
- curbit = (sample & ((uint64_t) (1 << p))) >> p;
- prevbit = (ctx->prevsample & ((uint64_t) (1 << p))) >> p;
-
- /* VCD only contains deltas/changes of signals. */
- if (prevbit == curbit)
- continue;
-
- /* Output which signal changed to which value. */
- g_string_append_printf(out, "#%" PRIu64 "\n%i%c\n",
- (uint64_t)(((float)samplecount / ctx->samplerate)
- * ctx->period), curbit, (char)('!' + p));
- }
-
- ctx->prevsample = sample;
- }
-
- *data_out = out->str;
- *length_out = out->len;
- g_string_free(out, FALSE);
-
- return SR_OK;
-}
-
-struct sr_output_format output_vcd = {
- .id = "vcd",
- .description = "Value Change Dump (VCD)",
- .df_type = SR_DF_LOGIC,
- .init = init,
- .data = data,
- .event = event,
-};
projects / libsigrok.git / blobdiff