From 32696420021d5da818ffad681a97eb427c847920 Mon Sep 17 00:00:00 2001
From: rafa <rafaelcorreia1602@gmail.com>
Date: Sat, 24 May 2025 18:48:22 +0100
Subject: [PATCH] Add encoder controller

---
 code/EncoderController.cpp | 90 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 90 insertions(+)
 create mode 100644 code/EncoderController.cpp

diff --git a/code/EncoderController.cpp b/code/EncoderController.cpp
new file mode 100644
index 0000000..4ce0598
--- /dev/null
+++ b/code/EncoderController.cpp
@@ -0,0 +1,90 @@
+#include <Arduino.h>
+
+enum EncoderDirection {
+    COUNTERCLOCKWISE = 2,
+    STOPPED = 0,
+    CLOCKWISE = 1,
+};
+
+enum ButtonState {
+    PRESSED = 0,
+    RELEASED = 1,
+};
+
+class EncoderController {
+
+    private:
+        int pin_clk;
+        int pin_dt;
+        int last_clk = HIGH;
+        int new_clk;
+        int dt_value;
+        EncoderDirection current_direction;
+        int pin_btn;
+        int button;
+        bool last_button_state = HIGH; // começa como solto
+        bool button_click_registered = false;
+
+    public:
+        EncoderController(int pin_dt, int pin_clk, int pin_btn) {
+            this->pin_dt = pin_dt;
+            this->pin_clk = pin_clk;
+            this->pin_btn = pin_btn;
+        }
+
+        void configure_pins() {
+            pinMode(this->pin_dt, INPUT_PULLUP);
+            pinMode(this->pin_clk, INPUT_PULLUP);
+            pinMode(this->pin_btn, INPUT_PULLUP);
+        }
+
+        bool clk_pin_changed(){
+            this->new_clk = digitalRead(this->pin_clk);
+            return this->new_clk != this->last_clk;
+        }
+
+        void read(){
+            if (this->clk_pin_changed()) {
+                this->last_clk = this->new_clk;
+                this->dt_value = digitalRead(this->pin_dt);
+                if (this->new_clk == LOW && this->dt_value == HIGH) {
+                    
+                    this->current_direction = CLOCKWISE;
+                }
+                if (this->new_clk == LOW && this->dt_value == LOW) {
+                    
+                    this->current_direction = COUNTERCLOCKWISE;
+                }
+            }
+
+            int current_state = digitalRead(this->pin_btn);
+            if (this->last_button_state == HIGH && current_state == LOW) {
+                this->button_click_registered = true;
+            }
+            this->last_button_state = current_state;
+        }
+
+        bool rotated_clockwise(){
+            if(this->current_direction == CLOCKWISE){
+                this->current_direction = STOPPED;
+                return true; 
+            }   
+            return false;
+        }
+
+        bool rotated_counterclockwise(){
+            if(this->current_direction == COUNTERCLOCKWISE){
+                this->current_direction = STOPPED;
+                return true; 
+            }   
+            return false;
+        }
+
+        bool button_pressed(){
+           if (this->button_click_registered) {
+                this->button_click_registered = false;
+                return true;
+            }
+            return false;
+        }
+};
\ No newline at end of file