Controlling Dot Matrix LED 8×8 1088BS using Joystick

1//Joystick configuration
2#define ANALOG_X_PIN A0
3#define ANALOG_Y_PIN A1
4#define ANALOG_BUTTON_PIN A2
5#define ANALOG_X_CORRECTION 125
6#define ANALOG_Y_CORRECTION 128
7#define MOVE_THRESHOLD 50  // minimal value from joystick to move
8#define MOVING_TIME 500    //Time in miliseconds
9
10struct button {
11	byte pressed = 0;
12};
13
14struct analog {
15	short x, y;
16
17	button button;
18};
19
20struct position {
21	short x, y;
22};
23
24position currentPosition{ 0, 0 };
25
26//Dot matrix 8x8 config
27//ROW x Arduino PIN for example row[0] = PIN 22, row[5] = PIN 9
28const int row[8] = {
29	22, 34, 2, 28, 9, 3, 8, 5
30};
31//COLUMN x Arduino PIN for example col[0] = PIN 32, row[5] = PIN 4
32const int col[8] = {
33	32, 7, 6, 24, 4, 26, 36, 38
34};
35
36void setup() {
37	pinMode(ANALOG_BUTTON_PIN, INPUT_PULLUP);
38
39	resetPosition(currentPosition);
40
41	Serial.begin(9600);
42}
43
44void loop() {
45	analog analog;
46
47	analog.x = readAnalogAxisLevel(ANALOG_X_PIN) - ANALOG_X_CORRECTION;
48	analog.y = readAnalogAxisLevel(ANALOG_Y_PIN) - ANALOG_Y_CORRECTION;
49	analog.y = analog.y * -1;  //reverse axis
50
51	analog.button.pressed = isAnalogButtonPressed(ANALOG_BUTTON_PIN);
52
53	Serial.print("Analog X:");
54	Serial.println(analog.x);
55
56	Serial.print("Analog Y:");
57	Serial.println(analog.y);
58
59	if (analog.button.pressed) {
60		Serial.println("Button pressed");
61		resetPosition(currentPosition);
62	} else {
63		Serial.println("Button not pressed");
64	}
65
66	move(analog.x, analog.y);
67
68	Serial.println("Current Dot Position x:" + (String)currentPosition.x + " y:" + (String)currentPosition.y);
69
70	delay(MOVING_TIME);
71}
72
73byte readAnalogAxisLevel(int pin) {
74	return map(analogRead(pin), 0, 1023, 0, 255);
75}
76
77bool isAnalogButtonPressed(int pin) {
78	return digitalRead(pin) == 0;
79}
80
81void resetPosition(position &pos) {
82	for (int thisPin = 0; thisPin < 8; thisPin++) {
83		pinMode(col[thisPin], OUTPUT);
84		pinMode(row[thisPin], OUTPUT);
85		digitalWrite(col[thisPin], HIGH);
86		digitalWrite(row[thisPin], LOW);
87	}
88
89	digitalWrite(row[0], HIGH);
90	digitalWrite(col[0], LOW);
91	pos.x = 0;
92	pos.y = 0;
93}
94
95void move(short x, short y) {
96	position oldPosition = currentPosition;
97
98	if (x > MOVE_THRESHOLD && oldPosition.x < 7) {
99		digitalWrite(col[oldPosition.x + 1], LOW);
100		digitalWrite(col[oldPosition.x], HIGH);
101		currentPosition.x = oldPosition.x + 1;
102	}
103
104	if (x < -1 * MOVE_THRESHOLD && oldPosition.x > 0) {
105		digitalWrite(col[oldPosition.x - 1], LOW);
106		digitalWrite(col[oldPosition.x], HIGH);
107		currentPosition.x = oldPosition.x - 1;
108	}
109
110	if (y < -1 * MOVE_THRESHOLD && oldPosition.y < 7) {
111		digitalWrite(row[oldPosition.y + 1], HIGH);
112		digitalWrite(row[oldPosition.y], LOW);
113		currentPosition.y = oldPosition.y + 1;
114	}
115
116	if (y > MOVE_THRESHOLD && oldPosition.y > 0) {
117		digitalWrite(row[oldPosition.y - 1], HIGH);
118		digitalWrite(row[oldPosition.y], LOW);
119		currentPosition.y = oldPosition.y - 1;
120	}
121}