added option throttle brake cut-off

ChangeLog

 
 *0.3.2 ()
 
+    added option throttle brake cut of to be able to drive forward only
+	vehicles (boats)
+
 *0.3.1 (26 Jun 2011)
 
     DIG mix can be set to channel 1 to have dual-ESC steering (boat, tank, ...)

MANUAL.txt

@@ -83,19 +83,22 @@ Standard menu:
     > turn wheel right to show right arrow - this represents Return speed 1-100%
 	100% means no delay
 	1%   means above 4s delay end to end
-- 4WS and DIG mixes
+- mixes 4WS, DIG, throttle brake cut-off (for boats with forward-only throttle)
     > choose menu EPOINT and press ENTER-long
     > menu EPOINT will blink
-    > select one of mixes 4WS (4) or DIG (d)
-    > press ENTER and choose channel for this mix or OFF
-	- for dual-ESC steering (boat, tank, ...) select DIG channel 1 and
-	  with D/R reduce required ESC travel (at 100% it will go to contra
-	  to allow steering at place)
-    > press ENTER and set mix in range -100...0...100 %
-	0%   is default and means both channel have same max steering/throttle
-	100% means 100% reduce on rear steering/throttle (eg. no steering)
-       -100% means 100% reduce on front steering/throttle (eg. no steering)
-    > for 4WS press ENTER and select crab (CRB) or no-crab (NOC)
+    > select one of mixes 4WS (4), DIG (d) or brake cut-off (b)
+      for mixes 4WS, DIG:
+	> press ENTER and choose channel for this mix or OFF
+	    - for dual-ESC steering (boat, tank, ...) select DIG channel 1 and
+	    with D/R reduce required ESC travel (at 100% it will go to contra
+	    to allow steering at place)
+	> press ENTER and set mix in range -100...0...100 %
+	    0%   is default and means both channel have same max steering/throttle
+	    100% means 100% reduce on rear steering/throttle (eg. no steering)
+	-100% means 100% reduce on front steering/throttle (eg. no steering)
+	> for 4WS press ENTER and select crab (CRB) or no-crab (NOC)
+      for brake cut-off:
+	> ser OFF or CUT
 - Key mapping specific for each model:
     > choose menu REV and press ENTER-long
     > menu REV will blink

calc.c

@@ -274,7 +274,7 @@ static void calc_loop(void) {
 	    menu_DIG_mix = (s8)(DIG_mix / PPM(5));
 	    // set it 2 times more to have contra ESC steering, it can be
 	    //   reduced by D/R setting
-	    DIG_mix *= 2;
+	    if (!cm.brake_off)  DIG_mix *= 2;
 	}
 
 
@@ -286,6 +286,7 @@ static void calc_loop(void) {
 			    cg.calib_throttle_mid << ADC_OVS_SHIFT,
 			    cg.calib_throttle_bck << ADC_OVS_SHIFT,
 			    cg.throttle_dead_zone << ADC_OVS_SHIFT);
+	if (cm.brake_off && val > 0)  val = 0;  // throttle brake cut off
 	val = expo(val, (u8)(val < 0 ? cm.expo_forward : cm.expo_back));
 	if (cm.abs_type) {
 	    // apply selected ABS
@@ -312,8 +313,10 @@ static void calc_loop(void) {
 	    }
 	}
 	val = dualrate(val, (u8)(val < 0 ? cm.dr_forward : cm.dr_back));
-	if (!cm.channel_DIG)
+	if (!cm.channel_DIG) {
+	    if (cm.brake_off)  val = val * 2 + PPM(500);
 	    channel_params(2, val);
+	}
 	else {
 	    // DIG mixing
 	    val2 = val;
@@ -325,6 +328,10 @@ static void calc_loop(void) {
 		// reduce rear throttle
 		val2 = (s16)((s32)val2 * (PPM(500) - DIG_mix) / PPM(500));
 
+	    if (cm.brake_off) {
+		val  = val  * 2 + PPM(500);
+		val2 = val2 * 2 + PPM(500);
+	    }
 	    channel_params(2, val);
 	    channel_params(cm.channel_DIG, val2);
 	}

config.c

@@ -108,6 +108,7 @@ void config_model_set_default(void) {
     cm.expo_back	= 0;
     cm.abs_type		= 0;
     cm.channel_4WS	= 0;
+    cm.brake_off	= 0;
     cm.channel_DIG	= 0;
     cm.channel_MP	= 0;
     memset(cm.multi_position, (u8)MULTI_POSITION_END, NUM_MULTI_POSITION);

config.h

@@ -122,6 +122,7 @@ typedef struct {
     s8 expo[3];			// steering/forward/back
     u8 abs_type:2;
     u8 channel_4WS:4;		// channel for 4WS mix or 0 when off
+    u8 brake_off:1;		// don't use brake side of throttle
     u8 channel_DIG:4;		// channel for DIG mix or 0 when off
     u8 channel_MP:4;		// channel for MultiPosition or 0 when off
     s8 multi_position[NUM_MULTI_POSITION];  // values for MultiPosition

menu_mix.c

@@ -140,13 +140,36 @@ static u8 mix_DIG(u8 val_id, u8 action) {
 }
 
 
+static u8 mix_brake_off(u8 val_id, u8 action) {
+    u8 id = val_id;
+    u8 val;
+
+    if (action == 1) {
+	// change value
+	cm.brake_off ^= 1;
+    }
+    else if (action == 2) {
+	// select next value
+	id = 1;  // only one item
+    }
+
+    // show value
+    lcd_7seg(L7_B);
+    lcd_chars(cm.brake_off ? "CUT" : "OFF");
+
+    return id;
+}
+
+
 
 
 
 
 typedef u8 (*mix_func_t)(u8 val_id, u8 action);
 static const mix_func_t menu_funcs[] = {
-    mix_4WS, mix_DIG
+    mix_4WS,
+    mix_DIG,
+    mix_brake_off,
 };
 #define MAX_MENU_IDS  (sizeof(menu_funcs) / sizeof(void *))