turned encoder into class

include/encoder.hpp

@@ -1,11 +1,30 @@
 #ifndef ENCODER_H
 #define ENCODER_H
-#include <atomic>
-#include "esp_pm.h"
+#include "driver/gpio.h"
 
-extern volatile int32_t encoder_count;
-extern esp_pm_lock_handle_t encoder_pm_lock;
-
-void encoder_init();
+class Encoder {
+public:
+    // Shared between ISR and main code
+    volatile int32_t count;
+    
+    // ISR-only state
+    uint8_t last_state_a;
+    uint8_t last_state_b;
+    int8_t last_count_base;
+    
+    // Configuration
+    gpio_num_t pin_a;
+    gpio_num_t pin_b;
+    
+    // Static ISR that receives instance pointer via arg
+    static void isr_handler(void* arg);
+    
+    // Constructor and methods
+    Encoder(gpio_num_t pinA, gpio_num_t pinB);
+    void init();
+    int32_t getCount() const { return count; }
+    void setCount(int32_t value) { count = value; }
+    void deinit();
+};
 
 #endif