};
const char *vcd_header = "\
-$date\n %s\n$end\n\
-$version\n %s\n$end\n\
-$comment\n Acquisition with %d/%d probes at %s\n$end\n\
+$date\n %s$end\n\
+$version\n %s\n$end\n%s\
$timescale\n %i %s\n$end\n\
$scope module %s $end\n\
%s\
$enddefinitions $end\n\
$dumpvars\n";
+const char *vcd_header_comment = "\
+$comment\n Acquisition with %d/%d probes at %s\n$end\n";
+
static int init(struct output *o)
{
/* Maximum header length */
uint64_t samplerate;
int i, b, num_probes;
char *c, *samplerate_s;
- char wbuf[1000];
+ char wbuf[1000], comment[128];
+ time_t t;
- ctx = malloc(sizeof(struct context));
- if (ctx == NULL)
+ if (!(ctx = calloc(1, sizeof(struct context))))
return SIGROK_ERR_MALLOC;
+
o->internal = ctx;
ctx->num_enabled_probes = 0;
+
for (l = o->device->probes; l; l = l->next) {
probe = l->data;
- if (probe->enabled)
- ctx->probelist[ctx->num_enabled_probes++] = probe->name;
+ if (!probe->enabled)
+ continue;
+ ctx->probelist[ctx->num_enabled_probes++] = probe->name;
}
ctx->probelist[ctx->num_enabled_probes] = 0;
/* TODO: Allow for configuration via o->param. */
- ctx->header = calloc(1, MAX_HEADER_LEN + 1);
- if (ctx->header == NULL)
+ if (!(ctx->header = calloc(1, MAX_HEADER_LEN + 1))) {
+ free(ctx);
return SIGROK_ERR_MALLOC;
+ }
num_probes = g_slist_length(o->device->probes);
- /* TODO: Handle num_probes == 0, too many probes, etc. */
- samplerate = *((uint64_t *) o->device->plugin->get_device_info(
- o->device->plugin_index, DI_CUR_SAMPLERATE));
- if ((samplerate_s = sigrok_samplerate_string(samplerate)) == NULL)
- return -1; // FIXME
+ comment[0] = '\0';
+ if (o->device->plugin) {
+ /* TODO: Handle num_probes == 0, too many probes, etc. */
+ /* TODO: Error handling. */
+ samplerate = *((uint64_t *) o->device->plugin->get_device_info(
+ o->device->plugin_index, DI_CUR_SAMPLERATE));
+ if (!((samplerate_s = sigrok_samplerate_string(samplerate)))) {
+ free(ctx->header);
+ free(ctx);
+ return SIGROK_ERR;
+ }
+ /* TODO: Handle sprintf() errors. */
+ snprintf(comment, 127, vcd_header_comment,
+ ctx->num_enabled_probes, num_probes, samplerate_s);
+ free(samplerate_s);
+ }
/* Wires / channels */
wbuf[0] = '\0';
for (i = 0; i < ctx->num_enabled_probes; i++) {
c = (char *)&wbuf + strlen((char *)&wbuf);
+ /* TODO: Needs fixing for very large number of probes. */
+ /* TODO: Handle sprintf() errors. */
sprintf(c, "$var wire 1 %c channel%s $end\n",
- (char)('!' + i), ctx->probelist[i]);
+ (char)('!' + i), ctx->probelist[i]);
}
- /* TODO: date: File or signals? Make y/n configurable. */
- b = snprintf(ctx->header, MAX_HEADER_LEN, vcd_header, "TODO: Date",
- PACKAGE_STRING, ctx->num_enabled_probes, num_probes,
- samplerate_s, 1, "ns", PACKAGE, (char *)&wbuf);
- /* TODO: Handle snprintf errors. */
+ /* TODO: Date: File or signals? Make y/n configurable. */
+ t = time(NULL);
+ b = snprintf(ctx->header, MAX_HEADER_LEN, vcd_header, ctime(&t),
+ PACKAGE_STRING, comment, 1, "ns", PACKAGE, (char *)&wbuf);
+ /* TODO: Handle snprintf() errors. */
- free(samplerate_s);
-
- ctx->prevbits = calloc(sizeof(int), num_probes);
- if (ctx->prevbits == NULL)
+ if (!(ctx->prevbits = calloc(sizeof(int), num_probes))) {
+ free(ctx->header);
+ free(ctx);
return SIGROK_ERR_MALLOC;
+ }
- return 0;
+ return SIGROK_OK;
}
static int event(struct output *o, int event_type, char **data_out,
int outlen;
ctx = o->internal;
- switch(event_type) {
+ switch (event_type) {
case DF_TRIGGER:
+ /* TODO */
break;
case DF_END:
outlen = strlen("$dumpoff\n$end\n");
- outbuf = malloc(outlen + 1);
- if (outbuf == NULL)
+ if (!(outbuf = malloc(outlen + 1)))
return SIGROK_ERR_MALLOC;
+ /* TODO: Bug? Drop the + 1? */
+ /* TODO: Handle snprintf() errors. */
snprintf(outbuf, outlen + 1, "$dumpoff\n$end\n");
*data_out = outbuf;
*length_out = outlen;
char **data_out, uint64_t *length_out)
{
struct context *ctx;
- int offset, outsize, p, curbit, prevbit;
+ unsigned int i, outsize;
+ int p, curbit, prevbit;
uint64_t sample, prevsample;
+ static uint64_t samplecount = 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;
+ outsize = 0;
+ if (ctx->header)
+ outsize = strlen(ctx->header);
+
+ /* FIXME: Use realloc(). */
+ if (!(outbuf = calloc(1, outsize + 1 + 10000)))
+ return SIGROK_ERR_MALLOC; /* TODO: free()? What to free? */
+
+ outbuf[0] = '\0';
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);
+ for (i = 0; i <= length_in - ctx->unitsize; i += ctx->unitsize) {
+ samplecount++;
+ memcpy(&sample, data_in + i, ctx->unitsize);
+ if (i == 0)
+ prevsample = sample;
+ else
+ memcpy(&prevsample, data_in + i - 1, ctx->unitsize);
+
for (p = 0; p < ctx->num_enabled_probes; p++) {
- curbit = (sample & ((uint64_t) (1 << p))) != 0;
- if (offset == 0) {
- prevbit = ~curbit;
- } else {
- memcpy(&prevsample, data_in + offset - 1, ctx->unitsize);
- prevbit = (prevsample & ((uint64_t) (1 << p))) != 0;
- }
-
- if (prevbit != curbit) {
- /* FIXME: Only once per sample? */
- c = outbuf + strlen(outbuf);
- sprintf(c, "#%i\n", offset * 1 /* TODO */);
-
- c = outbuf + strlen(outbuf);
- sprintf(c, "%i%c\n", curbit, (char)('!' + p /* FIXME? */));
- }
+ curbit = (sample & ((uint64_t) (1 << p))) >> p;
+ prevbit = (prevsample & ((uint64_t) (1 << p))) >> p;
+
+ /* VCD only contains deltas/changes of signals. */
+ if (prevbit == curbit)
+ continue;
+
+ /* Output which signal changed to which value. */
+ c = outbuf + strlen(outbuf);
+ sprintf(c, "#%" PRIu64 "\n%i%c\n", samplecount,
+ curbit, (char)('!' + p));
}
- /* TODO: Do a realloc() here if strlen(outbuf) is almost "full"... */
+ /* TODO: Use realloc() if strlen(outbuf) is almost "full"... */
}
*data_out = outbuf;
struct output_format output_vcd = {
"vcd",
"Value Change Dump (VCD)",
+ DF_LOGIC,
init,
data,
event,
projects / libsigrok.git / blobdiff