(DA) Internet of Things and Smart Electronics- ELE3006M2122 / FinalProject

FinalCode

Joystick.h@0:3262800b671c, 2022-02-04 (annotated)

Committer:
ciarankane123
Date:
Fri Feb 04 23:40:21 2022 +0000
Revision:
0:3262800b671c
Project

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ciarankane123 0:3262800b671c 1 #ifndef JOYSTICK_H
ciarankane123 0:3262800b671c 2 #define JOYSTICK_H
ciarankane123 0:3262800b671c 3
ciarankane123 0:3262800b671c 4 #include "mbed.h"
ciarankane123 0:3262800b671c 5
ciarankane123 0:3262800b671c 6 // this value can be tuned to alter tolerance of joystick movement
ciarankane123 0:3262800b671c 7 #define TOL 0.1f
ciarankane123 0:3262800b671c 8 #define RAD2DEG 57.2957795131f
ciarankane123 0:3262800b671c 9
ciarankane123 0:3262800b671c 10 enum Direction {
ciarankane123 0:3262800b671c 11 CENTRE, // 0
ciarankane123 0:3262800b671c 12 N, // 1
ciarankane123 0:3262800b671c 13 NE, // 2
ciarankane123 0:3262800b671c 14 E, // 3
ciarankane123 0:3262800b671c 15 SE, // 4
ciarankane123 0:3262800b671c 16 S, // 5
ciarankane123 0:3262800b671c 17 SW, // 6
ciarankane123 0:3262800b671c 18 W, // 7
ciarankane123 0:3262800b671c 19 NW // 8
ciarankane123 0:3262800b671c 20 };
ciarankane123 0:3262800b671c 21
ciarankane123 0:3262800b671c 22 struct Vector2D {
ciarankane123 0:3262800b671c 23 float x;
ciarankane123 0:3262800b671c 24 float y;
ciarankane123 0:3262800b671c 25 };
ciarankane123 0:3262800b671c 26
ciarankane123 0:3262800b671c 27 struct Polar {
ciarankane123 0:3262800b671c 28 float mag;
ciarankane123 0:3262800b671c 29 float angle;
ciarankane123 0:3262800b671c 30 };
ciarankane123 0:3262800b671c 31
ciarankane123 0:3262800b671c 32 /** Joystick Class
ciarankane123 0:3262800b671c 33 @brief Acknowledgements to Dr Craig A. Evans, University of Leeds
ciarankane123 0:3262800b671c 34 @brief Library for interfacing with analogue joystick
ciarankane123 0:3262800b671c 35 @upgraded Dr Edmond Nurellari, University of Lincoln
ciarankane123 0:3262800b671c 36
ciarankane123 0:3262800b671c 37 Example:
ciarankane123 0:3262800b671c 38
ciarankane123 0:3262800b671c 39 @code
ciarankane123 0:3262800b671c 40
ciarankane123 0:3262800b671c 41 #include "mbed.h"
ciarankane123 0:3262800b671c 42 #include "Joystick.h"
ciarankane123 0:3262800b671c 43
ciarankane123 0:3262800b671c 44 // y x button
ciarankane123 0:3262800b671c 45 Joystick joystick(PTB10,PTB11,PTC16);
ciarankane123 0:3262800b671c 46
ciarankane123 0:3262800b671c 47 int main() {
ciarankane123 0:3262800b671c 48
ciarankane123 0:3262800b671c 49 joystick.init();
ciarankane123 0:3262800b671c 50
ciarankane123 0:3262800b671c 51 while(1) {
ciarankane123 0:3262800b671c 52
ciarankane123 0:3262800b671c 53 Vector2D coord = joystick.get_coord();
ciarankane123 0:3262800b671c 54 printf("Coord = %f,%f\n",coord.x,coord.y);
ciarankane123 0:3262800b671c 55
ciarankane123 0:3262800b671c 56 Vector2D mapped_coord = joystick.get_mapped_coord();
ciarankane123 0:3262800b671c 57 printf("Mapped coord = %f,%f\n",mapped_coord.x,mapped_coord.y);
ciarankane123 0:3262800b671c 58
ciarankane123 0:3262800b671c 59 float mag = joystick.get_mag();
ciarankane123 0:3262800b671c 60 float angle = joystick.get_angle();
ciarankane123 0:3262800b671c 61 printf("Mag = %f Angle = %f\n",mag,angle);
ciarankane123 0:3262800b671c 62
ciarankane123 0:3262800b671c 63 Direction d = joystick.get_direction();
ciarankane123 0:3262800b671c 64 printf("Direction = %i\n",d);
ciarankane123 0:3262800b671c 65
ciarankane123 0:3262800b671c 66 if (joystick.button_pressed() ) {
ciarankane123 0:3262800b671c 67 printf("Button Pressed\n");
ciarankane123 0:3262800b671c 68 }
ciarankane123 0:3262800b671c 69
ciarankane123 0:3262800b671c 70 wait(0.5);
ciarankane123 0:3262800b671c 71 }
ciarankane123 0:3262800b671c 72
ciarankane123 0:3262800b671c 73
ciarankane123 0:3262800b671c 74 }
ciarankane123 0:3262800b671c 75
ciarankane123 0:3262800b671c 76 * @endcode
ciarankane123 0:3262800b671c 77 */
ciarankane123 0:3262800b671c 78 class Joystick
ciarankane123 0:3262800b671c 79 {
ciarankane123 0:3262800b671c 80 public:
ciarankane123 0:3262800b671c 81
ciarankane123 0:3262800b671c 82 // y-pot x-pot button
ciarankane123 0:3262800b671c 83 Joystick(PinName vertPin,PinName horizPin,PinName clickPin);
ciarankane123 0:3262800b671c 84
ciarankane123 0:3262800b671c 85 void init(); // needs to be called at start with joystick centred
ciarankane123 0:3262800b671c 86 float get_mag(); // polar
ciarankane123 0:3262800b671c 87 float get_angle(); // polar
ciarankane123 0:3262800b671c 88 Vector2D get_coord(); // cartesian co-ordinates x,y
ciarankane123 0:3262800b671c 89 Vector2D get_mapped_coord(); // x,y mapped to circle
ciarankane123 0:3262800b671c 90 Direction get_direction(); // N,NE,E,SE etc.
ciarankane123 0:3262800b671c 91 Polar get_polar(); // mag and angle in struct form
ciarankane123 0:3262800b671c 92 bool button_pressed(); // read button flag set in ISR when button pressed
ciarankane123 0:3262800b671c 93
ciarankane123 0:3262800b671c 94 private:
ciarankane123 0:3262800b671c 95
ciarankane123 0:3262800b671c 96 AnalogIn *vert;
ciarankane123 0:3262800b671c 97 AnalogIn *horiz;
ciarankane123 0:3262800b671c 98 InterruptIn *click;
ciarankane123 0:3262800b671c 99
ciarankane123 0:3262800b671c 100 int _click_flag; // flag set in ISR
ciarankane123 0:3262800b671c 101 void click_isr(); // ISR on button press
ciarankane123 0:3262800b671c 102
ciarankane123 0:3262800b671c 103 // centred x,y values
ciarankane123 0:3262800b671c 104 float _x0;
ciarankane123 0:3262800b671c 105 float _y0;
ciarankane123 0:3262800b671c 106
ciarankane123 0:3262800b671c 107 };
ciarankane123 0:3262800b671c 108
ciarankane123 0:3262800b671c 109 #endif