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#pragma once
#include <Arduino.h>
#include "pins.h"
#define DEFAULT_DEBOUNCE_TIME 25
#define KEY_1 0x800
#define KEY_2 0x400
#define KEY_3 0x200
#define KEY_4 0x100
#define KEY_5 0x080
#define KEY_6 0x040
#define KEY_7 0x020
#define KEY_8 0x010
#define KEY_9 0x008
#define KEY_STAR 0x004
#define KEY_0 0x002
#define KEY_HASH 0x001
class Keypad {
protected:
unsigned int m_mask;
unsigned int m_debounceTime;
bool m_debouncing;
unsigned long m_debounceEnd;
bool m_pressed;
static Keypad buttons[12];
void startDebounce() {
m_debouncing = true;
m_debounceEnd = millis() + m_debounceTime;
}
public:
static unsigned int state;
static void Setup() {
pinMode(LED, OUTPUT);
pinMode(COL_1, INPUT_PULLUP);
pinMode(COL_2, INPUT_PULLUP);
pinMode(COL_3, INPUT_PULLUP);
pinMode(ROW_1, INPUT_PULLUP);
pinMode(ROW_2, INPUT_PULLUP);
pinMode(ROW_3, INPUT_PULLUP);
pinMode(ROW_4, INPUT_PULLUP);
}
static void Update() {
byte col1 = 1 - digitalRead(COL_1);
byte col2 = 1 - digitalRead(COL_2);
byte col3 = 1 - digitalRead(COL_3);
byte row1 = 1 - digitalRead(ROW_1);
byte row2 = 1 - digitalRead(ROW_2);
byte row3 = 1 - digitalRead(ROW_3);
byte row4 = 1 - digitalRead(ROW_4);
#define BUILD_ROW(row, c1, c2, c3) \
( ((row & c1) << 2) | ((row & c2) << 1) | (row & c3) )
byte row1_buttons = BUILD_ROW(row1, col1, col2, col3);
byte row2_buttons = BUILD_ROW(row2, col1, col2, col3);
byte row3_buttons = BUILD_ROW(row3, col1, col2, col3);
byte row4_buttons = BUILD_ROW(row4, col1, col2, col3);
unsigned int pins = 0 |
(row1_buttons << 9) |
(row2_buttons << 6) |
(row3_buttons << 3) |
(row4_buttons << 0);
for (int i=0; i<12; i++) {
buttons[i].update(pins);
}
}
Keypad(unsigned int index, unsigned int debounceTime=DEFAULT_DEBOUNCE_TIME) {
m_mask = 1 << index;
m_debounceTime = debounceTime;
m_debouncing = false;
m_pressed = false;
}
void update(unsigned int pins) {
if (m_debouncing) {
if (millis() > m_debounceEnd) {
/* done debouncing, continue */
m_debouncing = false;
}
else {
/* still debouncing, ignore changes */
return;
}
}
if ((m_mask & pins)) {
/* pressed */
if (m_pressed) {
/* already marked */
}
else {
/* update state */
m_pressed = true;
state = state | m_mask;
startDebounce();
}
}
else {
/* released */
if (!m_pressed) {
/* already marked, ignore */
}
else {
/* update state */
m_pressed = false;
state = state & ~m_mask;
startDebounce();
}
}
}
};
unsigned int Keypad::state = 0;
Keypad Keypad::buttons[12] = {
Keypad(0),
Keypad(1),
Keypad(2),
Keypad(3),
Keypad(4),
Keypad(5),
Keypad(6),
Keypad(7),
Keypad(8),
Keypad(9),
Keypad(10),
Keypad(11),
};
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