#include "libsigrok.h"
#include "libsigrok-internal.h"
-/* Message logging helpers with subsystem-specific prefix string. */
-#define LOG_PREFIX "output/vcd: "
-#define sr_log(l, s, args...) sr_log(l, LOG_PREFIX s, ## args)
-#define sr_spew(s, args...) sr_spew(LOG_PREFIX s, ## args)
-#define sr_dbg(s, args...) sr_dbg(LOG_PREFIX s, ## args)
-#define sr_info(s, args...) sr_info(LOG_PREFIX s, ## args)
-#define sr_warn(s, args...) sr_warn(LOG_PREFIX s, ## args)
-#define sr_err(s, args...) sr_err(LOG_PREFIX s, ## args)
+#define LOG_PREFIX "output/vcd"
struct context {
- int num_enabled_probes;
- GArray *probeindices;
+ int num_enabled_channels;
+ GArray *channelindices;
GString *header;
uint8_t *prevsample;
int period;
uint64_t samplerate;
- unsigned int unitsize;
+ uint64_t samplecount;
};
-static const char *vcd_header_comment = "\
-$comment\n Acquisition with %d/%d probes at %s\n$end\n";
+static const char *const vcd_header_comment =
+ "$comment\n Acquisition with %d/%d channels at %s\n$end\n";
static int init(struct sr_output *o)
{
struct context *ctx;
- struct sr_probe *probe;
+ struct sr_channel *ch;
GSList *l;
GVariant *gvar;
- int num_probes, i;
+ int num_channels, i;
char *samplerate_s, *frequency_s, *timestamp;
time_t t;
- if (!(ctx = g_try_malloc0(sizeof(struct context)))) {
+ if (!(ctx = g_malloc0(sizeof(struct context)))) {
sr_err("%s: ctx malloc failed", __func__);
return SR_ERR_MALLOC;
}
o->internal = ctx;
- ctx->num_enabled_probes = 0;
- ctx->probeindices = g_array_new(FALSE, FALSE, sizeof(int));
+ ctx->num_enabled_channels = 0;
+ ctx->channelindices = g_array_new(FALSE, FALSE, sizeof(int));
- for (l = o->sdi->probes; l; l = l->next) {
- probe = l->data;
- if (!probe->enabled)
+ for (l = o->sdi->channels; l; l = l->next) {
+ ch = l->data;
+ if (ch->type != SR_CHANNEL_LOGIC)
continue;
- ctx->probeindices = g_array_append_val(
- ctx->probeindices, probe->index);
- ctx->num_enabled_probes++;
+ if (!ch->enabled)
+ continue;
+ ctx->channelindices = g_array_append_val(
+ ctx->channelindices, ch->index);
+ ctx->num_enabled_channels++;
}
- if (ctx->num_enabled_probes > 94) {
- sr_err("VCD only supports 94 probes.");
+ if (ctx->num_enabled_channels > 94) {
+ sr_err("VCD only supports 94 channels.");
return SR_ERR;
}
- ctx->unitsize = (ctx->num_enabled_probes + 7) / 8;
ctx->header = g_string_sized_new(512);
- num_probes = g_slist_length(o->sdi->probes);
+ num_channels = g_slist_length(o->sdi->channels);
/* timestamp */
t = time(NULL);
return SR_ERR;
}
g_string_append_printf(ctx->header, vcd_header_comment,
- ctx->num_enabled_probes, num_probes, samplerate_s);
+ ctx->num_enabled_channels, num_channels, samplerate_s);
g_free(samplerate_s);
}
g_string_append_printf(ctx->header, "$scope module %s $end\n", PACKAGE);
/* Wires / channels */
- for (i = 0, l = o->sdi->probes; l; l = l->next, i++) {
- probe = l->data;
- if (!probe->enabled)
+ for (i = 0, l = o->sdi->channels; l; l = l->next, i++) {
+ ch = l->data;
+ if (ch->type != SR_CHANNEL_LOGIC)
+ continue;
+ if (!ch->enabled)
continue;
g_string_append_printf(ctx->header, "$var wire 1 %c %s $end\n",
- (char)('!' + i), probe->name);
+ (char)('!' + i), ch->name);
}
g_string_append(ctx->header, "$upscope $end\n"
- "$enddefinitions $end\n$dumpvars\n");
-
- if (!(ctx->prevsample = g_try_malloc0(ctx->unitsize))) {
- g_string_free(ctx->header, TRUE);
- g_free(ctx);
- sr_err("%s: ctx->prevsample malloc failed", __func__);
- return SR_ERR_MALLOC;
- }
+ "$enddefinitions $end\n");
return SR_OK;
}
unsigned int i;
int p, curbit, prevbit, index;
uint8_t *sample;
- static uint64_t samplecount = 0;
+ gboolean timestamp_written;
(void)sdi;
*out = NULL;
if (!o || !o->internal)
- return SR_ERR_ARG;
+ return SR_ERR_BUG;
ctx = o->internal;
- if (packet->type == SR_DF_END) {
- *out = g_string_new("$dumpoff\n$end\n");
- return SR_OK;
- } else if (packet->type != SR_DF_LOGIC)
- return SR_OK;
-
if (ctx->header) {
/* The header is still here, this must be the first packet. */
*out = ctx->header;
ctx->header = NULL;
+ ctx->samplecount = 0;
} else {
*out = g_string_sized_new(512);
}
+ if (packet->type != SR_DF_LOGIC) {
+ if (packet->type == SR_DF_END)
+ /* Write final timestamp as length indicator. */
+ g_string_append_printf(*out, "#%.0f\n",
+ (double)ctx->samplecount /
+ ctx->samplerate * ctx->period);
+ return SR_OK;
+ }
+
logic = packet->payload;
- for (i = 0; i <= logic->length - logic->unitsize; i += logic->unitsize) {
- samplecount++;
+ if (!ctx->prevsample) {
+ /* Can't allocate this until we know the stream's unitsize. */
+ if (!(ctx->prevsample = g_malloc0(logic->unitsize))) {
+ g_free(ctx);
+ sr_err("%s: ctx->prevsample malloc failed", __func__);
+ return SR_ERR_MALLOC;
+ }
+ }
+
+ for (i = 0; i <= logic->length - logic->unitsize; i += logic->unitsize) {
sample = logic->data + i;
+ timestamp_written = FALSE;
+
+ for (p = 0; p < ctx->num_enabled_channels; p++) {
+ index = g_array_index(ctx->channelindices, int, p);
- for (p = 0; p < ctx->num_enabled_probes; p++) {
- index = g_array_index(ctx->probeindices, int, p);
- curbit = (sample[p / 8] & (((uint8_t) 1) << index)) >> index;
- prevbit = (ctx->prevsample[p / 8] & (((uint8_t) 1) << index)) >> index;
+ curbit = ((unsigned)sample[index / 8]
+ >> (index % 8)) & 1;
+ prevbit = ((unsigned)ctx->prevsample[index / 8]
+ >> (index % 8)) & 1;
/* VCD only contains deltas/changes of signals. */
- if (prevbit == curbit)
+ if (prevbit == curbit && ctx->samplecount > 0)
continue;
+ /* Output timestamp of subsequent signal changes. */
+ if (!timestamp_written)
+ g_string_append_printf(*out, "#%.0f",
+ (double)ctx->samplecount /
+ ctx->samplerate * ctx->period);
+
/* 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));
+ g_string_append_c(*out, ' ');
+ g_string_append_c(*out, '0' + curbit);
+ g_string_append_c(*out, '!' + p);
+
+ timestamp_written = TRUE;
}
- memcpy(ctx->prevsample, sample, ctx->unitsize);
+ if (timestamp_written)
+ g_string_append_c(*out, '\n');
+
+ ctx->samplecount++;
+ memcpy(ctx->prevsample, sample, logic->unitsize);
}
return SR_OK;
return SR_ERR_ARG;
ctx = o->internal;
+ g_free(ctx->prevsample);
+ g_array_free(ctx->channelindices, TRUE);
g_free(ctx);
return SR_OK;
struct sr_output_format output_vcd = {
.id = "vcd",
.description = "Value Change Dump (VCD)",
- .df_type = SR_DF_LOGIC,
.init = init,
.receive = receive,
.cleanup = cleanup,
projects / libsigrok.git / blobdiff