Added the debouncing code

Added the debouncing code and the interrupt service routines.

src/main.c

@@ -1,10 +1,3 @@
-/*
- * Author: Jake G Email: jakegoodwin@gorge.works
- * FileName: main.c
- * Date: 2025
- * Descripton: Program for Atiny13A controllers
- */
-
 #ifndef MCU
 #define MCU atiny13a
 #endif
@@ -13,9 +6,8 @@
 #define F_CPU 4800000UL
 #endif
 
-#include "stdio.h"
-
-#include <avr/io.h>
+#include "main.h"
+#include <avr/interrupt.h>
 #include <avr/eeprom.h>
 #include <util/delay.h>
 
@@ -24,23 +16,17 @@
 //Globals
 //#############################
 
+/* This line isn't really quite right.*/
+//uint8_t saved_position EEMEM;  // EEPROM storage for fader position
 
-//Debounce check number.
-#define MAX_CHECKS 10
+btn_state btn1;
 
-#define LED_PORT (1<<5) 
-#define LED_PIN PB5
-#define BLINK_DELAY_MS 5000
+/*Some variables for managing the debouncing*/
+volatile uint8_t debounced_state;
+volatile uint8_t db_state[MAX_CHECKS];
+volatile uint8_t idx;
 
-#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
+volatile uint16_t tick_count;
 
 //#############################
 //Prototypes
@@ -48,7 +34,6 @@ uint8_t saved_position EEMEM;  // EEPROM storage for fader position
 
 void led_blink(void);
 
-void setup(void);
 uint16_t readADC(void);
 void motorCoast(void);
 void motorMove(int direction);
@@ -62,6 +47,7 @@ uint8_t readButton(void);
 int main(int argc, char **argv)
 { 
 
+    /*
     while(1) {
         uint16_t fader_pos = readADC() >> 2; // Scale 10-bit ADC to 8-bit (0-255)
         uint8_t buttonState = readButton();
@@ -82,7 +68,8 @@ int main(int argc, char **argv)
         led_blink();
          
     }
-    
+    */
+
     return 0;
 }
 
@@ -92,6 +79,55 @@ int main(int argc, char **argv)
 //#############################
 
 
+void init_prog(void)
+{
+    /*Set the debounced state to all high*/
+    debounced_state = 0xFF;
+
+    init_btn(&btn1, PIN_SW1, PIN_ACTIVE1);
+
+    /*Wait 5ms for pull-up resistors voltage to become stable.*/
+    _delay_ms(5);
+
+    /*check if the eeprom has info. */
+    while(! eeprom_is_ready()) {} //Blocks until eeprom is ready.
+
+    //Checks against a bit pattern we defined to represent the start of data.
+    if(eeprom_read_byte((uint8_t *)ROM_SP_ADR) == START_PATTERN) {
+        //Reads the two bytes representing the two states.       
+        btn1.is_active = eeprom_read_byte((uint8_t *)ROM_BP1_ADR);
+    }
+    else {
+        //otherwise we write the init values for the start pattern and states.
+        eeprom_write_byte((uint8_t *)ROM_SP_ADR, START_PATTERN);
+        eeprom_write_byte((uint8_t *)ROM_BP1_ADR, 0x0);
+    }
+
+    btn1.is_pressed = ((PINB & (1<<btn1.input_pin))  == 0);
+
+    /*This is to read if the user wants to change the saved states.*/
+    /*Manually read the current switch state*/
+    /*
+    if(btn1.is_pressed){
+        btn1.is_active = ! btn1.is_active;
+        eeprom_write_byte((uint8_t *)ROM_BP1_ADR, btn1.is_active);
+        blink_bypass1();
+    }
+    if(btn2.is_pressed){
+        btn2.is_active = ! btn2.is_active;
+        eeprom_write_byte((uint8_t *)ROM_BP2_ADR, btn2.is_active);
+        blink_bypass2();
+    }   
+
+    if(btn1.is_active){PORTB |= (1<<btn1.output_pin);}
+    if(btn2.is_active){PORTB |= (1<<btn2.output_pin);}
+    */
+
+    init_timer0(); 
+}
+
+
+
 /*
  * ############################
  * DEBOUNCING CODE 
@@ -161,11 +197,6 @@ ISR(TIM0_OVF_vect)
         btn1.pressed_ticks += 1;
     }
 
-    if(btn2.timer_enabled && btn2.pressed_ticks <= UINT8_MAX){
-        btn2.pressed_ticks += 1;
-    }
-
-
     /*Re-Enable global interrupts*/
     sei();
 }