Added globals and function prototypes.

src/main.c

@@ -1,6 +1,7 @@
 #include "stdio.h"
 
 #include <avr/io.h>
+#include <avr/eeprom.h>
 #include <util/delay.h>
 
 
@@ -12,12 +13,27 @@
 #define LED_PIN PB5
 #define BLINK_DELAY_MS 5000
 
+#define PWM_PIN1 PB0  // Pin 5 - Motor PWM 1
+#define PWM_PIN2 PB1  // Pin 6 - Motor PWM 2
+#define ADC_PIN PB3   // Pin 2 - Fader position reading
+#define BUTTON_PIN PB4 // Pin 3 - Button input
+
+#define LONG_PRESS_TIME 1000  // 1 second hold
+#define SHORT_PRESS_TIME 50   // Debounce time
+
+uint8_t saved_position EEMEM;  // EEPROM storage for fader position
+
 //#############################
 //Prototypes
 //#############################
 
 void led_blink(void);
 
+void setup(void);
+uint16_t readADC(void);
+void motorCoast(void);
+void motorMove(int direction);
+uint8_t readButton(void);
 
 
 //#############################
@@ -26,11 +42,26 @@ void led_blink(void);
 
 int main(int argc, char **argv)
 { 
-    led_blink();
 
     while(1) {
+        uint16_t fader_pos = readADC() >> 2; // Scale 10-bit ADC to 8-bit (0-255)
+        uint8_t buttonState = readButton();
+        
+        if (buttonState == 2) { // Long press - Save position
+            eeprom_update_byte(&saved_position, fader_pos);
+        } 
+        else if (buttonState == 1) { // Short press - Move to saved position
+            uint8_t target_pos = eeprom_read_byte(&saved_position);
+            if (fader_pos < target_pos - 2) motorMove(1); // Move up
+            else if (fader_pos > target_pos + 2) motorMove(-1); // Move down
+            else motorCoast(); // Stop when reached position
+        } 
+        else {
+            motorCoast(); // Default to coast mode
+        }
+
         led_blink();
-        _delay_ms(500);
+         
     }
     
     return 0;