Diff: Electric_Loco.h

Revision:

1:8ef34deb5177

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Electric_Loco.h	Mon Nov 13 09:53:00 2017 +0000
@@ -0,0 +1,80 @@
+/*  Updated 12 Nov 2017
+    Jon Freeman
+
+  5" and 7.25" gauge Electric Locomotive Controller - ST DISCO-F746NG
+Uses built in display and touch screen.
+
+Display shows 'analogue' moving coil meter movements for :
+    Locomotive speed Miles per Hour
+    System voltage (range 20v - 90v or thereabouts)
+    Power Watts delivered to drive motors.
+
+Touch screen has three 'buttons', these are currently unused, and are where the meter movements show.
+Idea is to use two for two horns,
+
+Display has 'slider' touch control. This drives the loco.
+Control in central position when not driving or drfting.
+Moving towards bottom of screen applies regenerative braking - move further down applies harder braking.
+Moving towards top of screen powers drive motors, move further up applies more torque (current controller implemented)
+Take finger off and control drifts down to central 'neutral' position.
+*/
+#define MAX_TOUCHES 6       //  Touch screen can decode up to this many simultaneous finger press positions
+#define NEUTRAL_VAL   150   //  Number of pixels
+
+#define SLIDERX 418         //  slider graphic x position
+#define SLIDERY 2           //  slider graphic y position
+#define SLIDERW 50          //  pixel width of slider
+#define SLIDERH 268         //  pixel height of slider
+
+//  To get speedo reading correctly, need to use correct gear ratio and wheel size info
+//#define BOGIE_5_INCH
+#define BOGIE_7_and_a_quarter_INCH
+
+const   int
+
+    NUMBER_OF_MOTORS    = 4,    //  1 to 6 motors
+
+    BUTTON_RAD  = (SLIDERW / 2) - 4,    //  radius of circular 'knob' in slider control
+    MIN_POS     = BUTTON_RAD + 5,               //  top of screen
+    MAX_POS     = SLIDERH - (BUTTON_RAD + 1),   //  bottom of screen
+    CIRC_CTR = SLIDERX + BUTTON_RAD + 4;
+
+static const double
+#ifdef  BOGIE_7_and_a_quarter_INCH
+    MOTOR_PINION_T  = 17.0, //  motor pinion teeth, wheel gear teeth and wheel dia required to calculate speed and distance.
+    WHEEL_GEAR_T    = 76.0,
+    WHEEL_DIA_MM    = 147.0,
+#endif
+#ifdef  BOGIE_5_INCH
+    MOTOR_PINION_T  = 27.0, //  motor pinion teeth, wheel gear teeth and wheel dia required to calculate speed and distance.
+    WHEEL_GEAR_T    = 85.0,
+    WHEEL_DIA_MM    = 98.0,
+#endif
+    PI = 4.0 * atan(1.0),
+    WHEEL_CIRCUMFERENCE_METRE = PI * WHEEL_DIA_MM / 1000.0,
+    PULSES_PER_WHEEL_REV    = 32.0 * WHEEL_GEAR_T / MOTOR_PINION_T,
+    PULSES_PER_METRE        = PULSES_PER_WHEEL_REV / WHEEL_CIRCUMFERENCE_METRE,
+    rpm2mph         = 60.0                                      //  = Motor Revs per hour;
+                  * (MOTOR_PINION_T / WHEEL_GEAR_T)   //  = Wheel rev per hour
+                  * WHEEL_CIRCUMFERENCE_METRE         //  = metres per hour
+                  * 39.37                             //  = inches per hour
+                  / (1760 * 36)                       //  = miles per hour
+                  ;
+
+const   double LOCO_HANDBRAKE_ESCAPE_SPEED = 0.5;
+
+enum    {NO_DPS, ONE_DP};
+//  Assign unique number to every button we may use, and keep count of total number of them
+enum        {
+            ENTER, SLIDER, SPEEDO_BUT, VMETER_BUT, AMETER_BUT,
+            NUMOF_BUTTONS}  ;   //  button names
+enum        {
+            STATES, INACTIVE, RUN, NEUTRAL_DRIFT, REGEN_BRAKE, PARK, HANDBRAKE_SLIPPING};
+
+struct  slide   {   int position;    int    oldpos; int state; int direction;   bool recalc_run;    bool handbrake_slipping;    
+                    double handbrake_effort;   double   loco_speed;  }   ;
+struct  point   {   int x;    int y;  }   ;
+//struct  rect    {   struct point a, b; }   ;
+struct  key     {   int keynum; int x;  int y;  bool pressed;  }   ;
+struct  ky_bd   {   int count,  slider_y; key ky[MAX_TOUCHES + 1];   bool  sli;   }  ;
+