diff --git a/src/hal/gpio.h b/src/hal/gpio.h
index 236e40f..4bd4586 100644
--- a/src/hal/gpio.h
+++ b/src/hal/gpio.h
@@ -4,73 +4,68 @@
 namespace hal {
 namespace gpio {
 
-typedef struct
-{
-    volatile uint8_t PINx;
-    volatile uint8_t DDRx;
-    volatile uint8_t PORTx;
-} GPIO_TypeDef;
-    
-    enum class Mode
+    typedef struct
     {
+        volatile uint8_t PINx;
+        volatile uint8_t DDRx;
+        volatile uint8_t PORTx;
+    } GPIO_TypeDef;
+
+    enum class Mode {
         input = 0,
         output,
     };
-    
-    enum class Pull
-    {
+
+    enum class Pull {
         none = 0,
         up,
         down, //not available on the AVR
     };
-    
-    enum class Level
-    {
+
+    enum class Level {
         low = 0,
         high,
     };
 
-struct GPIO_InitTypeDef
-{
-  Mode mode;
-  Pull pull;
-  Level level;
-  inline GPIO_InitTypeDef() : mode(Mode::input), pull(Pull::none){};
-  inline GPIO_InitTypeDef(Mode mode, Pull pull) : mode(mode), pull(pull) {};
-  inline GPIO_InitTypeDef(Mode mode, Level level) : mode(mode), level(level) {};
-};
+    struct GPIO_InitTypeDef {
+        Mode mode;
+        Pull pull;
+        Level level;
+        inline GPIO_InitTypeDef()
+            : mode(Mode::input)
+            , pull(Pull::none) {};
+        inline GPIO_InitTypeDef(Mode mode, Pull pull)
+            : mode(mode)
+            , pull(pull) {};
+        inline GPIO_InitTypeDef(Mode mode, Level level)
+            : mode(mode)
+            , level(level) {};
+    };
 
-inline void WritePin(GPIO_TypeDef * const port, const uint8_t pin, Level level)
-{
-    if (level == Level::high)
-        port->PORTx |= (1 << pin);
-    else
-        port->PORTx &= ~(1 << pin);
-}
-
-inline Level ReadPin(GPIO_TypeDef * const port, const uint8_t pin)
-{
-    return (Level)(port->PINx & (1 << pin));
-}
-
-inline void TogglePin(GPIO_TypeDef * const port, const uint8_t pin)
-{
-    port->PINx |= (1 << pin);
-}
-
-inline void Init(GPIO_TypeDef * const port, const uint8_t pin, GPIO_InitTypeDef GPIO_Init)
-{
-    if (GPIO_Init.mode == Mode::output)
-    {
-        WritePin(port, pin, GPIO_Init.level);
-        port->DDRx |= (1 << pin);
+    inline void WritePin(GPIO_TypeDef *const port, const uint8_t pin, Level level) {
+        if (level == Level::high)
+            port->PORTx |= (1 << pin);
+        else
+            port->PORTx &= ~(1 << pin);
     }
-    else
-    {
-        port->DDRx &= ~(1 << pin);
-        WritePin(port, pin, (Level)GPIO_Init.pull);
+
+    inline Level ReadPin(GPIO_TypeDef *const port, const uint8_t pin) {
+        return (Level)(port->PINx & (1 << pin));
+    }
+
+    inline void TogglePin(GPIO_TypeDef *const port, const uint8_t pin) {
+        port->PINx |= (1 << pin);
+    }
+
+    inline void Init(GPIO_TypeDef *const port, const uint8_t pin, GPIO_InitTypeDef GPIO_Init) {
+        if (GPIO_Init.mode == Mode::output) {
+            WritePin(port, pin, GPIO_Init.level);
+            port->DDRx |= (1 << pin);
+        } else {
+            port->DDRx &= ~(1 << pin);
+            WritePin(port, pin, (Level)GPIO_Init.pull);
+        }
     }
-}
 
 }
 }
@@ -79,4 +74,4 @@ inline void Init(GPIO_TypeDef * const port, const uint8_t pin, GPIO_InitTypeDef
 #define GPIOC ((hal::gpio::GPIO_TypeDef *)&PINC)
 #define GPIOD ((hal::gpio::GPIO_TypeDef *)&PIND)
 #define GPIOE ((hal::gpio::GPIO_TypeDef *)&PINE)
-#define GPIOF ((hal::gpio::GPIO_TypeDef *)&PINF)
\ No newline at end of file
+#define GPIOF ((hal::gpio::GPIO_TypeDef *)&PINF)