diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7f5496a..dd62483 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -36,6 +36,8 @@ set(PROJECT_INCLUDE_DIRECTORIES
         SHAL/Include/Peripheral/GPIO/Reg
         SHAL/Include/Peripheral/UART
         SHAL/Include/Peripheral/UART/Reg
+        SHAL/Include/Peripheral/I2C
+        SHAL/Include/Peripheral/I2C/Reg
         SHAL/Include/Peripheral/EXT/
         ${CMAKE_CURRENT_SOURCE_DIR}/SHAL/Include
 )
diff --git a/SHAL/Include/Core/SHAL_CORE.h b/SHAL/Include/Core/SHAL_CORE.h
index c37cda4..3c4ef85 100644
--- a/SHAL/Include/Core/SHAL_CORE.h
+++ b/SHAL/Include/Core/SHAL_CORE.h
@@ -13,9 +13,16 @@
 
 //Universal structs and defines ---------------------------
 
-
-
-
+enum class AF_Mask : uint8_t{
+    AF0,
+    AF1,
+    AF2,
+    AF3,
+    AF4,
+    AF5,
+    AF6,
+    AF7
+};
 
 //---------------------------------------------------------
 
diff --git a/SHAL/Include/Peripheral/I2C/Reg/SHAL_I2C_REG.h b/SHAL/Include/Peripheral/I2C/Reg/SHAL_I2C_REG.h
new file mode 100644
index 0000000..291321a
--- /dev/null
+++ b/SHAL/Include/Peripheral/I2C/Reg/SHAL_I2C_REG.h
@@ -0,0 +1,8 @@
+//
+// Created by Luca on 9/9/2025.
+//
+
+#ifndef SHMINGO_HAL_SHAL_I2C_REG_H
+#define SHMINGO_HAL_SHAL_I2C_REG_H
+
+#endif //SHMINGO_HAL_SHAL_I2C_REG_H
diff --git a/SHAL/Include/Peripheral/I2C/Reg/SHAL_I2C_REG_F072xB.h b/SHAL/Include/Peripheral/I2C/Reg/SHAL_I2C_REG_F072xB.h
new file mode 100644
index 0000000..ecee868
--- /dev/null
+++ b/SHAL/Include/Peripheral/I2C/Reg/SHAL_I2C_REG_F072xB.h
@@ -0,0 +1,20 @@
+//
+// Created by Luca on 9/9/2025.
+//
+
+#ifndef SHMINGO_HAL_SHAL_I2C_REG_F072XB_H
+#define SHMINGO_HAL_SHAL_I2C_REG_F072XB_H
+
+#include "SHAL_CORE.h"
+
+enum class I2C_Pair : uint8_t{
+    //I2C_1
+    SCL1B6_SDA1B7, //AF1
+    SCL1B8_SDA1B9, //AF1
+
+    //I2C_2
+    SCL2B10_SDA2B11, //AF1
+    SCL2B13_SDA2B14, //AF5
+};
+
+#endif //SHMINGO_HAL_SHAL_I2C_REG_F072XB_H
diff --git a/SHAL/Include/Peripheral/I2C/Reg/SHAL_I2C_TYPES.h b/SHAL/Include/Peripheral/I2C/Reg/SHAL_I2C_TYPES.h
new file mode 100644
index 0000000..c88a007
--- /dev/null
+++ b/SHAL/Include/Peripheral/I2C/Reg/SHAL_I2C_TYPES.h
@@ -0,0 +1,25 @@
+//
+// Created by Luca on 9/9/2025.
+//
+
+#ifndef SHMINGO_HAL_SHAL_I2C_TYPES_H
+#define SHMINGO_HAL_SHAL_I2C_TYPES_H
+
+#include "SHAL_CORE.h"
+#include "SHAL_GPIO_REG.h"
+
+//Information necessary for I2C
+struct SHAL_I2C_Pair {
+    I2C_TypeDef* I2CReg;
+    GPIO_Key SCL_Key;
+    GPIO_Key SDA_Key;
+    AF_Mask SCL_Mask;
+    AF_Mask SDA_Mask;
+};
+
+struct SHAL_I2C_Enable_REG{
+    volatile uint32_t* reg;
+    uint32_t mask;
+};
+
+#endif //SHMINGO_HAL_SHAL_I2C_TYPES_H
diff --git a/SHAL/Include/Peripheral/I2C/SHAL_I2C.h b/SHAL/Include/Peripheral/I2C/SHAL_I2C.h
new file mode 100644
index 0000000..80476e9
--- /dev/null
+++ b/SHAL/Include/Peripheral/I2C/SHAL_I2C.h
@@ -0,0 +1,8 @@
+//
+// Created by Luca on 9/9/2025.
+//
+
+#ifndef SHMINGO_HAL_SHAL_I2C_H
+#define SHMINGO_HAL_SHAL_I2C_H
+
+#endif //SHMINGO_HAL_SHAL_I2C_H
diff --git a/SHAL/Include/Peripheral/UART/Reg/SHAL_UART_TYPES.h b/SHAL/Include/Peripheral/UART/Reg/SHAL_UART_TYPES.h
index 1220373..a1d0a1f 100644
--- a/SHAL/Include/Peripheral/UART/Reg/SHAL_UART_TYPES.h
+++ b/SHAL/Include/Peripheral/UART/Reg/SHAL_UART_TYPES.h
@@ -8,20 +8,10 @@
 #include "SHAL_CORE.h"
 #include "SHAL_GPIO_REG.h"
 
-enum class AF_Mask : uint8_t{
-    AF0,
-    AF1,
-    AF2,
-    AF3,
-    AF4,
-    AF5,
-    AF6,
-    AF7
-};
+
 
 //Represents a pair of pins usable for USART Tx + Rx in combination, and their alternate function mapping
 struct SHAL_UART_Pair{
-
     USART_TypeDef* USARTReg;
     GPIO_Key TxKey;
     GPIO_Key RxKey;