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-rw-r--r--12key-arduino/12key-arduino.ino151
-rw-r--r--12key-arduino/Button.h123
-rw-r--r--12key-arduino/pins.h10
3 files changed, 284 insertions, 0 deletions
diff --git a/12key-arduino/12key-arduino.ino b/12key-arduino/12key-arduino.ino
new file mode 100644
index 0000000..dc1210f
--- /dev/null
+++ b/12key-arduino/12key-arduino.ino
@@ -0,0 +1,151 @@
+#include <Arduino.h>
+#include "pins.h"
+
+class Button {
+ protected:
+ unsigned int m_mask;
+ unsigned int m_debounceTime;
+ bool m_debouncing;
+ unsigned long m_debounceEnd;
+ bool m_pressed;
+
+ void startDebounce() {
+ m_debouncing = true;
+ m_debounceEnd = millis() + m_debounceTime;
+ }
+
+ public:
+ static unsigned int state;
+ Button(unsigned int index, unsigned int debounceTime=4) {
+ 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 Button::state = 0;
+
+Button buttons[] = {
+ Button(0),
+ Button(1),
+ Button(2),
+ Button(3),
+ Button(4),
+ Button(5),
+ Button(6),
+ Button(7),
+ Button(8),
+ Button(9),
+ Button(10),
+ Button(11),
+};
+
+/* pin bitmask order: xxxx 1234 5678 9*0# */
+unsigned int ReadPins() {
+ 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);
+
+ return 0 |
+ (row1_buttons << 9) |
+ (row2_buttons << 6) |
+ (row3_buttons << 3) |
+ (row4_buttons << 0);
+}
+
+void setup() {
+ 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);
+
+ Serial.begin(115200);
+}
+
+
+void PrintPin(unsigned int pins, int index, const char *msg) {
+ if (pins & (1 << index)) {
+ Serial.print(msg);
+ }
+}
+
+
+void loop() {
+ unsigned int pins = ReadPins();
+ for (int i=0; i<12; i++) {
+ buttons[i].update(pins);
+ }
+
+ if (Button::state != 0) {
+ Serial.print("buttons: ");
+ PrintPin(Button::state, 11, "1");
+ PrintPin(Button::state, 10, "2");
+ PrintPin(Button::state, 9, "3");
+ PrintPin(Button::state, 8, "4");
+ PrintPin(Button::state, 7, "5");
+ PrintPin(Button::state, 6, "6");
+ PrintPin(Button::state, 5, "7");
+ PrintPin(Button::state, 4, "8");
+ PrintPin(Button::state, 3, "9");
+ PrintPin(Button::state, 2, "*");
+ PrintPin(Button::state, 1, "0");
+ PrintPin(Button::state, 0, "#");
+ Serial.println();
+ Button::state = 0;
+ }
+}
diff --git a/12key-arduino/Button.h b/12key-arduino/Button.h
new file mode 100644
index 0000000..c67086b
--- /dev/null
+++ b/12key-arduino/Button.h
@@ -0,0 +1,123 @@
+#pragma once
+
+#include <Arduino.h>
+#include "pins.h"
+
+class Button {
+ protected:
+ unsigned int m_mask;
+ unsigned int m_debounceTime;
+ bool m_debouncing;
+ unsigned long m_debounceEnd;
+ bool m_pressed;
+
+ static buttons[12];
+
+ void startDebounce() {
+ m_debouncing = true;
+ m_debounceEnd = millis() + m_debounceTime;
+ }
+
+ public:
+ static unsigned int state;
+ static void Setup() {
+ 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 UpdateAll() {
+ 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);
+ }
+ }
+
+ Button(unsigned int index, unsigned int debounceTime=4) {
+ 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 Button::state = 0;
+
+Button Button::buttons[12] = {
+ Button(0),
+ Button(1),
+ Button(2),
+ Button(3),
+ Button(4),
+ Button(5),
+ Button(6),
+ Button(7),
+ Button(8),
+ Button(9),
+ Button(10),
+ Button(11),
+};
diff --git a/12key-arduino/pins.h b/12key-arduino/pins.h
new file mode 100644
index 0000000..78eb7f2
--- /dev/null
+++ b/12key-arduino/pins.h
@@ -0,0 +1,10 @@
+#pragma once
+
+#define COL_1 A1
+#define COL_2 A3
+#define COL_3 15
+
+#define ROW_1 A2
+#define ROW_2 16
+#define ROW_3 14
+#define ROW_4 A0
generated by cgit v1.2.1 (git 2.18.0) at 2024-11-22 04:26:18 +0000