From ddfa2308c0be4c002f982ae9da6032ee7854117d Mon Sep 17 00:00:00 2001
From: Keith Packard <keithp@keithp.com>
Date: Fri, 17 Jul 2009 21:24:45 -0700
Subject: [PATCH] Support the not-connected GPS state

---
 aoview/aoview.h         |  3 ++-
 aoview/aoview_monitor.c | 14 +++++++++++---
 aoview/aoview_state.c   | 10 ++++++----
 3 files changed, 19 insertions(+), 8 deletions(-)

diff --git a/aoview/aoview.h b/aoview/aoview.h
index b4d13159..800349ec 100644
--- a/aoview/aoview.h
+++ b/aoview/aoview.h
@@ -69,7 +69,8 @@ struct aodata {
 	int	flight_pres;
 	int	ground_pres;
 	int	nsat;
-	int	locked;
+	int	gps_locked;
+	int	gps_connected;
 	struct {
 		int hour;
 		int minute;
diff --git a/aoview/aoview_monitor.c b/aoview/aoview_monitor.c
index 43381800..8d120091 100644
--- a/aoview/aoview_monitor.c
+++ b/aoview/aoview_monitor.c
@@ -106,14 +106,22 @@ aoview_monitor_parse(const char *input_line)
 	aoview_parse_int(&data.flight_pres, words[30]);
 	aoview_parse_int(&data.ground_pres, words[32]);
 	aoview_parse_int(&data.nsat, words[34]);
-	if (strcmp (words[36], "unlocked") != 0 && nword >= 40) {
-		data.locked = 1;
+	if (strcmp (words[36], "unlocked") == 0) {
+		data.gps_connected = 1;
+		data.gps_locked = 0;
+		data.gps_time.hour = data.gps_time.minute = data.gps_time.second = 0;
+		data.lat = data.lon = 0;
+		data.alt = 0;
+	} else if (nword >= 40) {
+		data.gps_locked = 1;
+		data.gps_connected = 1;
 		sscanf(words[36], "%d:%d:%d", &data.gps_time.hour, &data.gps_time.minute, &data.gps_time.second);
 		aoview_parse_pos(&data.lat, words[37]);
 		aoview_parse_pos(&data.lon, words[38]);
 		sscanf(words[39], "%dm", &data.alt);
 	} else {
-		data.locked = 0;
+		data.gps_connected = 0;
+		data.gps_locked = 0;
 		data.gps_time.hour = data.gps_time.minute = data.gps_time.second = 0;
 		data.lat = data.lon = 0;
 		data.alt = 0;
diff --git a/aoview/aoview_state.c b/aoview/aoview_state.c
index cf1594cd..a0a608e0 100644
--- a/aoview/aoview_state.c
+++ b/aoview/aoview_state.c
@@ -130,7 +130,7 @@ aoview_state_derive(struct aodata *data, struct aostate *state)
 	state->main_sense = data->main / 32767.0 * 15.0;
 	state->battery = data->batt / 32767.0 * 5.0;
 	if (!strcmp(data->state, "pad")) {
-		if (data->locked && data->nsat >= 4) {
+		if (data->gps_locked && data->nsat >= 4) {
 			state->npad++;
 			state->pad_lat_total += data->lat;
 			state->pad_lon_total += data->lon;
@@ -159,7 +159,7 @@ aoview_state_derive(struct aodata *data, struct aostate *state)
 
 	if (state->height > state->max_height)
 		state->max_height = state->height;
-	if (data->locked) {
+	if (data->gps_locked) {
 		state->lat = data->lat;
 		state->lon = data->lon;
 		aoview_great_circle(state->pad_lat, state->pad_lon, data->lat, data->lon,
@@ -296,7 +296,7 @@ aoview_state_notify(struct aodata *data)
 	aoview_table_add_row(0, "Main", "%5.2fV", state->main_sense);
 	aoview_table_add_row(0, "Pad altitude", "%dm", state->ground_altitude);
 	aoview_table_add_row(1, "Satellites", "%d", state->data.nsat);
-	if (state->data.locked) {
+	if (state->data.gps_locked) {
 		aoview_state_add_deg(1, "Latitude", state->data.lat, 'N', 'S');
 		aoview_state_add_deg(1, "Longitude", state->data.lon, 'E', 'W');
 		aoview_table_add_row(1, "GPS height", "%d", state->gps_height);
@@ -313,8 +313,10 @@ aoview_state_notify(struct aodata *data)
 				     state->data.hdop, state->data.h_error, state->data.v_error);
 		aoview_table_add_row(1, "Distance from pad", "%5.0fm", state->distance);
 		aoview_table_add_row(1, "Direction from pad", "%4.0f°", state->bearing);
-	} else {
+	} else if (state->data.gps_connected) {
 		aoview_table_add_row(1, "GPS", "unlocked");
+	} else {
+		aoview_table_add_row(1, "GPS", "not available");
 	}
 	if (state->npad) {
 		aoview_state_add_deg(1, "Pad latitude", state->pad_lat, 'N', 'S');
-- 
2.30.2