hameg-hmo: Add SR_CONF_TRIGGER_PATTERN support.

Introduce support for the Pattern Trigger functionality, sometimes also
called Logic Trigger.

include/libsigrok/libsigrok.h

@@ -770,6 +770,9 @@ enum sr_configkey {
 	/** The device supports setting trigger slope. */
 	SR_CONF_TRIGGER_SLOPE,
 
+	/** The device supports setting a pattern for the logic trigger. */
+	SR_CONF_TRIGGER_PATTERN,
+
 	/** The device supports averaging. */
 	SR_CONF_AVERAGING,
 

src/hardware/hameg-hmo/api.c

@@ -200,6 +200,9 @@ static int config_get(uint32_t key, GVariant **data,
 	case SR_CONF_TRIGGER_SLOPE:
 		*data = g_variant_new_string((*model->trigger_slopes)[state->trigger_slope]);
 		break;
+	case SR_CONF_TRIGGER_PATTERN:
+		*data = g_variant_new_string(state->trigger_pattern);
+		break;
 	case SR_CONF_HORIZ_TRIGGERPOS:
 		*data = g_variant_new_double(state->horiz_triggerpos);
 		break;
@@ -250,7 +253,7 @@ static int config_set(uint32_t key, GVariant *data,
 	const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 {
 	int ret, cg_type, idx, j;
-	char command[MAX_COMMAND_SIZE], float_str[30];
+	char command[MAX_COMMAND_SIZE], float_str[30], *tmp_str;
 	struct dev_context *devc;
 	const struct scope_config *model;
 	struct scope_state *state;
@@ -341,6 +344,21 @@ static int config_set(uint32_t key, GVariant *data,
 			   (*model->trigger_slopes)[idx]);
 		ret = sr_scpi_send(sdi->conn, command);
 		break;
+	case SR_CONF_TRIGGER_PATTERN:
+		tmp_str = (char *)g_variant_get_string(data, 0);
+		idx = strlen(tmp_str);
+		if (idx == 0 || idx > model->analog_channels + model->digital_channels)
+			return SR_ERR_ARG;
+		g_snprintf(command, sizeof(command),
+			   (*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_PATTERN],
+			   tmp_str);
+		if (sr_scpi_send(sdi->conn, command) != SR_OK ||
+		    sr_scpi_get_opc(sdi->conn) != SR_OK)
+			return SR_ERR;
+		g_free(state->trigger_pattern);
+		state->trigger_pattern = g_strdup(tmp_str);
+		ret = SR_OK;
+		break;
 	case SR_CONF_COUPLING:
 		if (!cg)
 			return SR_ERR_CHANNEL_GROUP;

src/hardware/hameg-hmo/protocol.c

@@ -46,6 +46,12 @@ static const char *hameg_scpi_dialect[] = {
 	[SCPI_CMD_SET_DIG_POD_STATE]	      = ":POD%d:STAT %d",
 	[SCPI_CMD_GET_TRIGGER_SLOPE]	      = ":TRIG:A:EDGE:SLOP?",
 	[SCPI_CMD_SET_TRIGGER_SLOPE]	      = ":TRIG:A:TYPE EDGE;:TRIG:A:EDGE:SLOP %s",
+	[SCPI_CMD_GET_TRIGGER_PATTERN]	      = ":TRIG:A:PATT:SOUR?",
+	[SCPI_CMD_SET_TRIGGER_PATTERN]	      = ":TRIG:A:TYPE LOGIC;" \
+					        ":TRIG:A:PATT:FUNC AND;" \
+					        ":TRIG:A:PATT:COND TRUE;" \
+					        ":TRIG:A:PATT:MODE OFF;" \
+					        ":TRIG:A:PATT:SOUR \"%s\"",
 	[SCPI_CMD_GET_TRIGGER_SOURCE]	      = ":TRIG:A:SOUR?",
 	[SCPI_CMD_SET_TRIGGER_SOURCE]	      = ":TRIG:A:SOUR %s",
 	[SCPI_CMD_GET_DIG_CHAN_STATE]	      = ":LOG%d:STAT?",
@@ -72,6 +78,7 @@ static const uint32_t devopts[] = {
 	SR_CONF_HORIZ_TRIGGERPOS | SR_CONF_GET | SR_CONF_SET,
 	SR_CONF_TRIGGER_SOURCE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
 	SR_CONF_TRIGGER_SLOPE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
+	SR_CONF_TRIGGER_PATTERN | SR_CONF_GET | SR_CONF_SET,
 };
 
 static const uint32_t devopts_cg_analog[] = {
@@ -415,10 +422,15 @@ static void scope_state_dump(const struct scope_config *config,
 	sr_info("Current samplerate: %s", tmp);
 	g_free(tmp);
 
-	sr_info("Current trigger: %s (source), %s (slope) %.2f (offset)",
-		(*config->trigger_sources)[state->trigger_source],
-		(*config->trigger_slopes)[state->trigger_slope],
-		state->horiz_triggerpos);
+	if (!strcmp("PATT", (*config->trigger_sources)[state->trigger_source]))
+		sr_info("Current trigger: %s (pattern), %.2f (offset)",
+			state->trigger_pattern,
+			state->horiz_triggerpos);
+	else // Edge (slope) trigger
+		sr_info("Current trigger: %s (source), %s (slope) %.2f (offset)",
+			(*config->trigger_sources)[state->trigger_source],
+			(*config->trigger_slopes)[state->trigger_slope],
+			state->horiz_triggerpos);
 }
 
 static int scope_state_get_array_option(struct sr_scpi_dev_inst *scpi,
@@ -773,6 +785,11 @@ SR_PRIV int hmo_scope_state_get(struct sr_dev_inst *sdi)
 			&state->trigger_slope) != SR_OK)
 		return SR_ERR;
 
+	if (sr_scpi_get_string(sdi->conn,
+			       (*config->scpi_dialect)[SCPI_CMD_GET_TRIGGER_PATTERN],
+			       &state->trigger_pattern) != SR_OK)
+		return SR_ERR;
+
 	if (hmo_update_sample_rate(sdi) != SR_OK)
 		return SR_ERR;
 

src/hardware/hameg-hmo/protocol.h

@@ -29,7 +29,7 @@
 #define LOG_PREFIX "hameg-hmo"
 
 #define MAX_INSTRUMENT_VERSIONS 10
-#define MAX_COMMAND_SIZE 48
+#define MAX_COMMAND_SIZE 128
 #define MAX_ANALOG_CHANNEL_COUNT 4
 #define MAX_DIGITAL_CHANNEL_COUNT 16
 #define MAX_DIGITAL_GROUP_COUNT	2
@@ -103,6 +103,8 @@ struct scope_state {
 
 	int trigger_source;
 	int trigger_slope;
+	char *trigger_pattern;
+
 	uint64_t sample_rate;
 };
 

src/hwdriver.c

@@ -83,6 +83,8 @@ static struct sr_key_info sr_key_info_config[] = {
 		"Run length encoding", NULL},
 	{SR_CONF_TRIGGER_SLOPE, SR_T_STRING, "triggerslope",
 		"Trigger slope", NULL},
+	{SR_CONF_TRIGGER_PATTERN, SR_T_STRING, "triggerpattern",
+		"Trigger pattern", NULL},
 	{SR_CONF_AVERAGING, SR_T_BOOL, "averaging",
 		"Averaging", NULL},
 	{SR_CONF_AVG_SAMPLES, SR_T_UINT64, "avg_samples",

src/scpi.h

@@ -39,6 +39,8 @@ enum {
 	SCPI_CMD_SET_VERTICAL_DIV,
 	SCPI_CMD_GET_TRIGGER_SLOPE,
 	SCPI_CMD_SET_TRIGGER_SLOPE,
+	SCPI_CMD_GET_TRIGGER_PATTERN,
+	SCPI_CMD_SET_TRIGGER_PATTERN,
 	SCPI_CMD_GET_TRIGGER_SOURCE,
 	SCPI_CMD_SET_TRIGGER_SOURCE,
 	SCPI_CMD_GET_COUPLING,