X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=src%2Fhardware%2Fdemo%2Fprotocol.c;h=9969abf90f4171154751d48a4a239529e7507589;hb=393375e1fee969e7c80feac0cb1df718bd652578;hp=242d471ee26831fcf6f7240d0cc0f44fa1e1541c;hpb=81d53a29d6afad1e091bb765d6952ec047e0dc6a;p=libsigrok.git

diff --git a/src/hardware/demo/protocol.c b/src/hardware/demo/protocol.c
index 242d471e..9969abf9 100644
--- a/src/hardware/demo/protocol.c
+++ b/src/hardware/demo/protocol.c
@@ -273,12 +273,40 @@ static void logic_generator(struct sr_dev_inst *sdi, uint64_t size)
 		break;
 	case PATTERN_INC:
 		for (i = 0; i < size; i++) {
-			for (j = 0; j < devc->logic_unitsize; j++) {
+			for (j = 0; j < devc->logic_unitsize; j++)
 				devc->logic_data[i + j] = devc->step;
-			}
 			devc->step++;
 		}
 		break;
+	case PATTERN_WALKING_ONE:
+		/* j contains the value of the highest bit */
+	        j = 1 << (devc->num_logic_channels - 1);
+		for (i = 0; i < size; i++) {
+			devc->logic_data[i] = devc->step;
+			if (devc->step == 0)
+				devc->step = 1;
+			else
+				if (devc->step == j)
+					devc->step = 0;
+				else
+					devc->step <<= 1;
+		}
+		break;
+	case PATTERN_WALKING_ZERO:
+		/* Same as walking one, only with inverted output */
+		/* j contains the value of the highest bit */
+	        j = 1 << (devc->num_logic_channels - 1);
+		for (i = 0; i < size; i++) {
+			devc->logic_data[i] = ~devc->step;
+			if (devc->step == 0)
+				devc->step = 1;
+			else
+				if (devc->step == j)
+					devc->step = 0;
+				else
+					devc->step <<= 1;
+		}
+		break;
 	case PATTERN_ALL_LOW:
 	case PATTERN_ALL_HIGH:
 		/* These were set when the pattern mode was selected. */
@@ -304,6 +332,34 @@ static void logic_generator(struct sr_dev_inst *sdi, uint64_t size)
 	}
 }
 
+/*
+ * Fixup a memory image of generated logic data before it gets sent to
+ * the session's datafeed. Mask out content from disabled channels.
+ *
+ * TODO: Need we apply a channel map, and enforce a dense representation
+ * of the enabled channels' data?
+ */
+static void logic_fixup_feed(struct dev_context *devc,
+		struct sr_datafeed_logic *logic)
+{
+	size_t fp_off;
+	uint8_t fp_mask;
+	size_t off, idx;
+	uint8_t *sample;
+
+	fp_off = devc->first_partial_logic_index;
+	fp_mask = devc->first_partial_logic_mask;
+	if (fp_off == logic->unitsize)
+		return;
+
+	for (off = 0; off < logic->length; off += logic->unitsize) {
+		sample = logic->data + off;
+		sample[fp_off] &= fp_mask;
+		for (idx = fp_off + 1; idx < logic->unitsize; idx++)
+			sample[idx] = 0x00;
+	}
+}
+
 static void send_analog_packet(struct analog_gen *ag,
 		struct sr_dev_inst *sdi, uint64_t *analog_sent,
 		uint64_t analog_pos, uint64_t analog_todo)
@@ -314,13 +370,16 @@ static void send_analog_packet(struct analog_gen *ag,
 	int ag_pattern_pos;
 	unsigned int i;
 
+	if (!ag->ch || !ag->ch->enabled)
+		return;
+
 	devc = sdi->priv;
 	packet.type = SR_DF_ANALOG;
 	packet.payload = &ag->packet;
 
 	if (!devc->avg) {
 		ag_pattern_pos = analog_pos % ag->num_samples;
-		sending_now = MIN(analog_todo, ag->num_samples-ag_pattern_pos);
+		sending_now = MIN(analog_todo, ag->num_samples - ag_pattern_pos);
 		ag->packet.data = ag->pattern_data + ag_pattern_pos;
 		ag->packet.num_samples = sending_now;
 		sr_session_send(sdi, &packet);
@@ -329,7 +388,7 @@ static void send_analog_packet(struct analog_gen *ag,
 		*analog_sent = MAX(*analog_sent, sending_now);
 	} else {
 		ag_pattern_pos = analog_pos % ag->num_samples;
-		to_avg = MIN(analog_todo, ag->num_samples-ag_pattern_pos);
+		to_avg = MIN(analog_todo, ag->num_samples - ag_pattern_pos);
 
 		for (i = 0; i < to_avg; i++) {
 			ag->avg_val = (ag->avg_val +
@@ -385,7 +444,7 @@ SR_PRIV int demo_prepare_data(int fd, int revents, void *cb_data)
 	if (devc->cur_samplerate <= 0
 			|| (devc->num_logic_channels <= 0
 			&& devc->num_analog_channels <= 0)) {
-		sdi->driver->dev_acquisition_stop(sdi);
+		sr_dev_acquisition_stop(sdi);
 		return G_SOURCE_CONTINUE;
 	}
 
@@ -413,7 +472,11 @@ SR_PRIV int demo_prepare_data(int fd, int revents, void *cb_data)
 	todo_us = samples_todo * G_USEC_PER_SEC / devc->cur_samplerate;
 
 	logic_done  = devc->num_logic_channels  > 0 ? 0 : samples_todo;
+	if (!devc->enabled_logic_channels)
+		logic_done = samples_todo;
 	analog_done = devc->num_analog_channels > 0 ? 0 : samples_todo;
+	if (!devc->enabled_analog_channels)
+		analog_done = samples_todo;
 
 	while (logic_done < samples_todo || analog_done < samples_todo) {
 		/* Logic */
@@ -426,6 +489,7 @@ SR_PRIV int demo_prepare_data(int fd, int revents, void *cb_data)
 			logic.length = sending_now * devc->logic_unitsize;
 			logic.unitsize = devc->logic_unitsize;
 			logic.data = devc->logic_data;
+			logic_fixup_feed(devc, &logic);
 			sr_session_send(sdi, &packet);
 			logic_done += sending_now;
 		}
@@ -457,7 +521,7 @@ SR_PRIV int demo_prepare_data(int fd, int revents, void *cb_data)
 			|| (limit_us > 0 && devc->spent_us >= limit_us)) {
 
 		/* If we're averaging everything - now is the time to send data */
-		if (devc->avg_samples == 0) {
+		if (devc->avg && devc->avg_samples == 0) {
 			g_hash_table_iter_init(&iter, devc->ch_ag);
 			while (g_hash_table_iter_next(&iter, NULL, &value)) {
 				ag = value;
@@ -469,7 +533,7 @@ SR_PRIV int demo_prepare_data(int fd, int revents, void *cb_data)
 			}
 		}
 		sr_dbg("Requested number of samples reached.");
-		sdi->driver->dev_acquisition_stop(sdi);
+		sr_dev_acquisition_stop(sdi);
 	}
 
 	return G_SOURCE_CONTINUE;