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sr: sr_parse_triggerstring docs/improvements. 

Also fix smaller typos and cosmetics.
This commit is contained in:
Uwe Hermann 2012-04-07 17:35:14 +02:00
parent 44dfd483db
commit bf978d3553
2 changed files with 28 additions and 9 deletions
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2
device.c
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@ -353,6 +353,8 @@ SR_API int sr_dev_trigger_set(struct sr_dev *dev, int probenum,
g_free(p->trigger);
p->trigger = g_strdup(trigger);
sr_dbg("dev: %s: Setting '%s' trigger for probe %d.", __func__,
p->trigger, probenum);
return SR_OK;
}

35
strutil.c
View File

@ -111,12 +111,25 @@ SR_API char *sr_period_string(uint64_t frequency)
}
/**
* TODO
* Parse a trigger specification string.
*
* @param dev TODO
* @param triggerstring TODO
* @param dev The device for which the trigger specification is intended.
* @param triggerstring The string containing the trigger specification for
* one or more probes of this device. Entries for multiple probes are
* comma-separated. Triggers are specified in the form key=value,
* where the key is a probe number (or probe name) and the value is
* the requested trigger type. Valid trigger types currently
* include 'r' (rising edge), 'f' (falling edge), 'c' (any pin value
* change), '0' (low value), or '1' (high value).
* Example: "1=r,sck=f,miso=0,7=c"
*
* @return TODO
* @return Pointer to a list of trigger types (strings), or NULL upon errors.
* The pointer list (if non-NULL) has as many entries as the
* respective device has probes (all physically available probes,
* not just enabled ones). Entries of the list which don't have
* a trigger value set in 'triggerstring' are NULL, the other entries
* contain the respective trigger type which is requested for the
* respective probe (e.g. "r", "c", and so on).
*/
SR_API char **sr_parse_triggerstring(struct sr_dev *dev,
const char *triggerstring)
@ -131,14 +144,18 @@ SR_API char **sr_parse_triggerstring(struct sr_dev *dev,
error = FALSE;
if (!(triggerlist = g_try_malloc0(max_probes * sizeof(char *)))) {
sr_err("session file: %s: metafile malloc failed", __func__);
sr_err("strutil: %s: triggerlist malloc failed", __func__);
return NULL;
}
tokens = g_strsplit(triggerstring, ",", max_probes);
trigger_types = dev->driver->dev_info_get(0, SR_DI_TRIGGER_TYPES);
if (trigger_types == NULL)
if (!trigger_types) {
sr_err("strutil: %s: Device doesn't support any triggers.",
__func__);
return NULL;
}
for (i = 0; tokens[i]; i++) {
if (tokens[i][0] < '0' || tokens[i][0] > '9') {
@ -158,7 +175,7 @@ SR_API char **sr_parse_triggerstring(struct sr_dev *dev,
}
if (probenum < 1 || probenum > max_probes) {
sr_err("Invalid probe.\n");
sr_err("strutil: Invalid probe (%d).\n", probenum);
error = TRUE;
break;
}
@ -166,8 +183,8 @@ SR_API char **sr_parse_triggerstring(struct sr_dev *dev,
if ((trigger = strchr(tokens[i], '='))) {
for (tc = ++trigger; *tc; tc++) {
if (strchr(trigger_types, *tc) == NULL) {
sr_err("Unsupported trigger type "
"'%c'\n", *tc);
sr_err("strutil: Unsupported trigger "
"type '%c'.\n", *tc);
error = TRUE;
break;
}