added key function C3R, channel3 reset

ChangeLog

@@ -4,6 +4,7 @@
     added DIG mix
     added steering speed (Turn, Return)
     added inactivity alarm
+    added function C3R for keys to reset channel3 value to centre
     internal changes of trims momentary/opposite_reset
 
 *0.1.0 (2 Jun 2011)

MANUAL.txt

@@ -232,5 +232,6 @@ CHn		- switch channel "n" value from one end value to opposite end
 		  selected for this button, then centre 3-pos value will also
 		  be detected and set to servo (but this was not tested yet,
 		  I wouldn't do this modification to my radio).
+C3R		- channel3 reset value to centre
 4WS		- switch crab (CRB) no-crab (NOC) for 4 wheel steering
 

menu_popup.c

@@ -399,6 +399,18 @@ static void kf_channel(s16 channel, u8 flags) {
     }
 }
 
+// reset channel value to 0
+static void kf_channel_reset(s16 channel, u8 flags) {
+    s8 *aval = &menu_channel3_8[channel - 3];
+
+    *aval = 0;
+    if (flags & FF_SHOW) {
+	lcd_segment(LS_SYM_CHANNEL, LS_ON);
+	lcd_7seg((u8)channel);
+	lcd_char_num3(*aval);
+    }
+}
+
 // change 4WS crab/no-crab
 static void kf_4ws(s16 unused, u8 flags) {
     if (flags & FF_SET) {
@@ -437,7 +449,8 @@ static const key_functions_s key_functions[] = {
 #endif
 #endif
 #endif
-    { 7, "4WS", KF_2STATE, kf_4ws, 0 },
+    { 8, "4WS", KF_2STATE, kf_4ws, 0 },
+    { 7, "C3R", KF_NONE, kf_channel_reset, 3 },
 };
 #define KEY_FUNCTIONS_SIZE  (sizeof(key_functions) / sizeof(key_functions_s))