diff --git a/.gitignore b/.gitignore
index 567609b..69fa449 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1 @@
-build/
+_build/
diff --git a/.vscode/c_cpp_properties.json b/.vscode/c_cpp_properties.json
index bd491f1..c39ec3d 100644
--- a/.vscode/c_cpp_properties.json
+++ b/.vscode/c_cpp_properties.json
@@ -3,7 +3,8 @@
         {
             "name": "Linux",
             "includePath": [
-                "${workspaceFolder}/**"
+                "${workspaceFolder}/**",
+                "${workspaceFolder}/base"
             ],
             "defines": [],
             "compilerPath": "/usr/bin/clang",
diff --git a/.vscode/launch.json b/.vscode/launch.json
index c292221..308edaa 100644
--- a/.vscode/launch.json
+++ b/.vscode/launch.json
@@ -8,7 +8,7 @@
             "name": "gdb Launch Debug",
             "type": "cppdbg",
             "request": "launch",
-            "program": "${workspaceFolder}/build/firmware.elf",
+            "program": "${workspaceFolder}/_build/firmware.elf",
             "args": [
                 "-d","${workspaceFolder}/Core/Src",
                 "-d","${workspaceFolder}/Core/Startup",
@@ -53,7 +53,7 @@
                 },
                 {
                     "description": "Load executable into debugger.",
-                    "text": "file ${workspaceFolder}/build/firmware.elf",
+                    "text": "file ${workspaceFolder}/_build/firmware.elf",
                     "ignoreFailures": false
                 },
                 {
diff --git a/Core/Src/main.cc b/Core/main.cc
similarity index 91%
rename from Core/Src/main.cc
rename to Core/main.cc
index e1bb58d..b67de4c 100644
--- a/Core/Src/main.cc
+++ b/Core/main.cc
@@ -5,13 +5,15 @@
 
 #include "main.h"
 
+#include "platform/stm32g0xx/Gpio.h"
+
 IWDG_HandleTypeDef hiwdg;
 UART_HandleTypeDef huart2;
 
 static void SystemClock_Config(void);
 static void MX_GPIO_Init(void);
 static void MX_USART2_UART_Init(void);
-static void MX_IWDG_Init(void);
+// static void MX_IWDG_Init(void);
 
 #define SYS_TICK_PRIO   0
 
@@ -64,7 +66,11 @@ int main(void)
             j = 800;
         }
         printf("%u: Hello World\r\n", i++);
+<<<<<<< HEAD
         HAL_GPIO_TogglePin(LED_GREEN_GPIO_Port, LED_GREEN_Pin);
+=======
+        green_led.toggle();
+>>>>>>> 133286e (fix: format)
         HAL_Delay(j);
         // HAL_IWDG_Refresh(&hiwdg);
     }
@@ -137,16 +143,16 @@ void SystemClock_Config(void)
     MODIFY_REG(RCC->CCIPR, RCC_CCIPR_USART2SEL, RCC_USART2CLKSOURCE_PCLK1);
 }
 
-static void MX_IWDG_Init(void)
-{
-    hiwdg.Instance = IWDG;
-    hiwdg.Init.Prescaler = IWDG_PRESCALER_4;
-    hiwdg.Init.Window = 4095;
-    hiwdg.Init.Reload = 4095;
-    if (HAL_IWDG_Init(&hiwdg) != HAL_OK) {
-        Error_Handler();
-    }
-}
+// static void MX_IWDG_Init(void)
+// {
+//     hiwdg.Instance = IWDG;
+//     hiwdg.Init.Prescaler = IWDG_PRESCALER_4;
+//     hiwdg.Init.Window = 4095;
+//     hiwdg.Init.Reload = 4095;
+//     if (HAL_IWDG_Init(&hiwdg) != HAL_OK) {
+//         Error_Handler();
+//     }
+// }
 
 static void MX_USART2_UART_Init(void)
 {
diff --git a/Core/Inc/main.h b/Core/main.h
similarity index 100%
rename from Core/Inc/main.h
rename to Core/main.h
diff --git a/Core/Src/print.c b/Core/print.c
similarity index 100%
rename from Core/Src/print.c
rename to Core/print.c
diff --git a/Drivers/STM32G0xx_HAL_Driver/Inc/Legacy/stm32_hal_legacy.h b/Legacy/STM32G0xx_HAL_Driver/Inc/Legacy/stm32_hal_legacy.h
similarity index 100%
rename from Drivers/STM32G0xx_HAL_Driver/Inc/Legacy/stm32_hal_legacy.h
rename to Legacy/STM32G0xx_HAL_Driver/Inc/Legacy/stm32_hal_legacy.h
diff --git a/Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal.h b/Legacy/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal.h
similarity index 100%
rename from Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal.h
rename to Legacy/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal.h
diff --git a/Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_cortex.h b/Legacy/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_cortex.h
similarity index 100%
rename from Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_cortex.h
rename to Legacy/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_cortex.h
diff --git a/Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_def.h b/Legacy/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_def.h
similarity index 100%
rename from Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_def.h
rename to Legacy/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_def.h
diff --git a/Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_dma.h b/Legacy/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_dma.h
similarity index 100%
rename from Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_dma.h
rename to Legacy/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_dma.h
diff --git a/Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_dma_ex.h b/Legacy/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_dma_ex.h
similarity index 100%
rename from Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_dma_ex.h
rename to Legacy/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_dma_ex.h
diff --git a/Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_exti.h b/Legacy/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_exti.h
similarity index 100%
rename from Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_exti.h
rename to Legacy/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_exti.h
diff --git a/Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_flash.h b/Legacy/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_flash.h
similarity index 100%
rename from Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_flash.h
rename to Legacy/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_flash.h
diff --git a/Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_flash_ex.h b/Legacy/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_flash_ex.h
similarity index 100%
rename from Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_flash_ex.h
rename to Legacy/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_flash_ex.h
diff --git a/Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_gpio.h b/Legacy/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_gpio.h
similarity index 100%
rename from Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_gpio.h
rename to Legacy/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_gpio.h
diff --git a/Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_gpio_ex.h b/Legacy/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_gpio_ex.h
similarity index 100%
rename from Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_gpio_ex.h
rename to Legacy/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_gpio_ex.h
diff --git a/Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_iwdg.h b/Legacy/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_iwdg.h
similarity index 100%
rename from Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_iwdg.h
rename to Legacy/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_iwdg.h
diff --git a/Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_pwr.h b/Legacy/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_pwr.h
similarity index 100%
rename from Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_pwr.h
rename to Legacy/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_pwr.h
diff --git a/Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_pwr_ex.h b/Legacy/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_pwr_ex.h
similarity index 100%
rename from Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_pwr_ex.h
rename to Legacy/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_pwr_ex.h
diff --git a/Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_rcc.h b/Legacy/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_rcc.h
similarity index 100%
rename from Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_rcc.h
rename to Legacy/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_rcc.h
diff --git a/Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_rcc_ex.h b/Legacy/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_rcc_ex.h
similarity index 100%
rename from Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_rcc_ex.h
rename to Legacy/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_rcc_ex.h
diff --git a/Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_tim.h b/Legacy/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_tim.h
similarity index 100%
rename from Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_tim.h
rename to Legacy/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_tim.h
diff --git a/Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_tim_ex.h b/Legacy/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_tim_ex.h
similarity index 100%
rename from Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_tim_ex.h
rename to Legacy/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_tim_ex.h
diff --git a/Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_uart.h b/Legacy/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_uart.h
similarity index 100%
rename from Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_uart.h
rename to Legacy/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_uart.h
diff --git a/Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_uart_ex.h b/Legacy/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_uart_ex.h
similarity index 100%
rename from Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_uart_ex.h
rename to Legacy/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_uart_ex.h
diff --git a/Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_ll_dma.h b/Legacy/STM32G0xx_HAL_Driver/Inc/stm32g0xx_ll_dma.h
similarity index 100%
rename from Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_ll_dma.h
rename to Legacy/STM32G0xx_HAL_Driver/Inc/stm32g0xx_ll_dma.h
diff --git a/Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_ll_dmamux.h b/Legacy/STM32G0xx_HAL_Driver/Inc/stm32g0xx_ll_dmamux.h
similarity index 100%
rename from Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_ll_dmamux.h
rename to Legacy/STM32G0xx_HAL_Driver/Inc/stm32g0xx_ll_dmamux.h
diff --git a/Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_ll_rcc.h b/Legacy/STM32G0xx_HAL_Driver/Inc/stm32g0xx_ll_rcc.h
similarity index 100%
rename from Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_ll_rcc.h
rename to Legacy/STM32G0xx_HAL_Driver/Inc/stm32g0xx_ll_rcc.h
diff --git a/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal.c b/Legacy/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal.c
similarity index 100%
rename from Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal.c
rename to Legacy/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal.c
diff --git a/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_cortex.c b/Legacy/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_cortex.c
similarity index 100%
rename from Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_cortex.c
rename to Legacy/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_cortex.c
diff --git a/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_dma.c b/Legacy/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_dma.c
similarity index 100%
rename from Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_dma.c
rename to Legacy/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_dma.c
diff --git a/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_dma_ex.c b/Legacy/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_dma_ex.c
similarity index 100%
rename from Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_dma_ex.c
rename to Legacy/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_dma_ex.c
diff --git a/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_exti.c b/Legacy/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_exti.c
similarity index 100%
rename from Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_exti.c
rename to Legacy/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_exti.c
diff --git a/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_flash.c b/Legacy/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_flash.c
similarity index 100%
rename from Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_flash.c
rename to Legacy/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_flash.c
diff --git a/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_flash_ex.c b/Legacy/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_flash_ex.c
similarity index 100%
rename from Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_flash_ex.c
rename to Legacy/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_flash_ex.c
diff --git a/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_gpio.c b/Legacy/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_gpio.c
similarity index 100%
rename from Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_gpio.c
rename to Legacy/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_gpio.c
diff --git a/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_iwdg.c b/Legacy/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_iwdg.c
similarity index 100%
rename from Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_iwdg.c
rename to Legacy/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_iwdg.c
diff --git a/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_pwr.c b/Legacy/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_pwr.c
similarity index 100%
rename from Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_pwr.c
rename to Legacy/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_pwr.c
diff --git a/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_pwr_ex.c b/Legacy/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_pwr_ex.c
similarity index 100%
rename from Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_pwr_ex.c
rename to Legacy/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_pwr_ex.c
diff --git a/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_rcc.c b/Legacy/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_rcc.c
similarity index 100%
rename from Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_rcc.c
rename to Legacy/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_rcc.c
diff --git a/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_rcc_ex.c b/Legacy/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_rcc_ex.c
similarity index 100%
rename from Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_rcc_ex.c
rename to Legacy/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_rcc_ex.c
diff --git a/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_tim.c b/Legacy/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_tim.c
similarity index 100%
rename from Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_tim.c
rename to Legacy/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_tim.c
diff --git a/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_tim_ex.c b/Legacy/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_tim_ex.c
similarity index 100%
rename from Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_tim_ex.c
rename to Legacy/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_tim_ex.c
diff --git a/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_uart.c b/Legacy/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_uart.c
similarity index 100%
rename from Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_uart.c
rename to Legacy/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_uart.c
diff --git a/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_uart_ex.c b/Legacy/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_uart_ex.c
similarity index 100%
rename from Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_uart_ex.c
rename to Legacy/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_uart_ex.c
diff --git a/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_ll_dma.c b/Legacy/STM32G0xx_HAL_Driver/Src/stm32g0xx_ll_dma.c
similarity index 100%
rename from Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_ll_dma.c
rename to Legacy/STM32G0xx_HAL_Driver/Src/stm32g0xx_ll_dma.c
diff --git a/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_ll_rcc.c b/Legacy/STM32G0xx_HAL_Driver/Src/stm32g0xx_ll_rcc.c
similarity index 100%
rename from Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_ll_rcc.c
rename to Legacy/STM32G0xx_HAL_Driver/Src/stm32g0xx_ll_rcc.c
diff --git a/Makefile b/Makefile
index 2e5fa12..5f15b63 100644
--- a/Makefile
+++ b/Makefile
@@ -3,40 +3,32 @@ TARGET = firmware
 DEBUG = 1
 OPT = -O0
 
-BUILD_DIR = build
+BUILD_DIR = _build
 
 CC_SOURCES = \
-Core/Src/main.cc \
+Core/main.cc \
+platform/stm32g0xx/Gpio.cc \
 
 C_SOURCES = \
-Core/Src/stm32g0xx_it.c \
-Core/Src/stm32g0xx_hal_msp.c \
-Core/Src/system_stm32g0xx.c \
-Core/Src/syscalls.c \
-Core/Src/sysmem.c \
-Core/Src/print.c \
-Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_rcc.c \
-Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal.c \
-Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_cortex.c \
-Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_rcc_ex.c \
-Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_pwr.c \
-Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_pwr_ex.c \
-Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_iwdg.c \
-Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_uart_ex.c \
-Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_uart.c \
-Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_gpio.c
-# Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_tim.c \
-# Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_tim_ex.c \
-# Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_ll_rcc.c \
-# Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_flash.c \
-# Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_flash_ex.c \
-# Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_dma.c \
-# Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_dma_ex.c \
-
-# Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_exti.c
+platform/stm32g0xx/stm32g0xx_it.c \
+platform/stm32g0xx/stm32g0xx_hal_msp.c \
+platform/stm32g0xx/system_stm32g0xx.c \
+platform/stm32g0xx/syscalls.c \
+platform/stm32g0xx/sysmem.c \
+Core/print.c \
+Legacy/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_rcc.c \
+Legacy/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal.c \
+Legacy/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_cortex.c \
+Legacy/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_rcc_ex.c \
+Legacy/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_pwr.c \
+Legacy/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_pwr_ex.c \
+Legacy/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_iwdg.c \
+Legacy/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_uart_ex.c \
+Legacy/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_uart.c \
+Legacy/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_gpio.c
 
 ASM_SOURCES = \
-Core/Startup/startup_stm32g071rbtx.s
+platform/stm32g0xx/startup_stm32g071rbtx.s
 
 PREFIX = arm-none-eabi-
 CC = $(PREFIX)gcc
@@ -51,22 +43,18 @@ BIN = $(CP) -O binary -S
 CPU = -mcpu=cortex-m0plus
 MCU = $(CPU) -mthumb $(FPU) $(FLOAT-ABI)
 
-AS_DEFS = 
-
 C_DEFS = \
 -DUSE_HAL_DRIVER \
 -DSTM32G071xx
 
-
-AS_INCLUDES =
-
 C_INCLUDES = \
--ICore/Inc \
--IDrivers/STM32G0xx_HAL_Driver/Inc \
--IDrivers/STM32G0xx_HAL_Driver/Inc/Legacy \
--IDrivers/CMSIS/Device/ST/STM32G0xx/Include \
--IDrivers/CMSIS/Include
-
+-I. \
+-ICore \
+-ILegacy/STM32G0xx_HAL_Driver/Inc \
+-ILegacy/STM32G0xx_HAL_Driver/Inc/Legacy \
+-Iarch/CMSIS/Device/ST/STM32G0xx/Include \
+-Iarch/CMSIS/Include \
+-Iplatform/stm32g0xx
 
 ASFLAGS = $(MCU) $(AS_DEFS) $(AS_INCLUDES) $(OPT) -Wall -fdata-sections -ffunction-sections
 CFLAGS = $(MCU) $(C_DEFS) $(C_INCLUDES) $(OPT) -Wall -fdata-sections -ffunction-sections
@@ -77,7 +65,7 @@ endif
 
 CFLAGS += -MMD -MP -MF"$(@:%.o=%.d)"
 
-LDSCRIPT = STM32G071RBTX_FLASH.ld
+LDSCRIPT = platform/stm32g0xx/STM32G071RBTX_FLASH.ld
 
 LIBS = -lc -lm -lnosys
 LIBDIR =
@@ -105,7 +93,6 @@ $(BUILD_DIR)/%.o: %.s Makefile | $(BUILD_DIR)
 
 $(BUILD_DIR)/$(TARGET).elf: $(OBJECTS) Makefile
 	$(CXX) $(OBJECTS) $(LDFLAGS) -o $@
-	# $(CC) $(OBJECTS) $(LDFLAGS) -o $@
 	$(SZ) $@
 
 $(BUILD_DIR)/%.hex: $(BUILD_DIR)/%.elf | $(BUILD_DIR)
diff --git a/Drivers/CMSIS/Device/ST/STM32G0xx/Include/stm32g071xx.h b/arch/CMSIS/Device/ST/STM32G0xx/Include/stm32g071xx.h
similarity index 100%
rename from Drivers/CMSIS/Device/ST/STM32G0xx/Include/stm32g071xx.h
rename to arch/CMSIS/Device/ST/STM32G0xx/Include/stm32g071xx.h
diff --git a/Drivers/CMSIS/Device/ST/STM32G0xx/Include/stm32g0xx.h b/arch/CMSIS/Device/ST/STM32G0xx/Include/stm32g0xx.h
similarity index 100%
rename from Drivers/CMSIS/Device/ST/STM32G0xx/Include/stm32g0xx.h
rename to arch/CMSIS/Device/ST/STM32G0xx/Include/stm32g0xx.h
diff --git a/Drivers/CMSIS/Device/ST/STM32G0xx/Include/system_stm32g0xx.h b/arch/CMSIS/Device/ST/STM32G0xx/Include/system_stm32g0xx.h
similarity index 100%
rename from Drivers/CMSIS/Device/ST/STM32G0xx/Include/system_stm32g0xx.h
rename to arch/CMSIS/Device/ST/STM32G0xx/Include/system_stm32g0xx.h
diff --git a/Drivers/CMSIS/Include/cmsis_armcc.h b/arch/CMSIS/Include/cmsis_armcc.h
similarity index 100%
rename from Drivers/CMSIS/Include/cmsis_armcc.h
rename to arch/CMSIS/Include/cmsis_armcc.h
diff --git a/Drivers/CMSIS/Include/cmsis_armclang.h b/arch/CMSIS/Include/cmsis_armclang.h
similarity index 100%
rename from Drivers/CMSIS/Include/cmsis_armclang.h
rename to arch/CMSIS/Include/cmsis_armclang.h
diff --git a/Drivers/CMSIS/Include/cmsis_armclang_ltm.h b/arch/CMSIS/Include/cmsis_armclang_ltm.h
similarity index 100%
rename from Drivers/CMSIS/Include/cmsis_armclang_ltm.h
rename to arch/CMSIS/Include/cmsis_armclang_ltm.h
diff --git a/Drivers/CMSIS/Include/cmsis_compiler.h b/arch/CMSIS/Include/cmsis_compiler.h
similarity index 100%
rename from Drivers/CMSIS/Include/cmsis_compiler.h
rename to arch/CMSIS/Include/cmsis_compiler.h
diff --git a/Drivers/CMSIS/Include/cmsis_gcc.h b/arch/CMSIS/Include/cmsis_gcc.h
similarity index 100%
rename from Drivers/CMSIS/Include/cmsis_gcc.h
rename to arch/CMSIS/Include/cmsis_gcc.h
diff --git a/Drivers/CMSIS/Include/cmsis_iccarm.h b/arch/CMSIS/Include/cmsis_iccarm.h
similarity index 100%
rename from Drivers/CMSIS/Include/cmsis_iccarm.h
rename to arch/CMSIS/Include/cmsis_iccarm.h
diff --git a/Drivers/CMSIS/Include/cmsis_version.h b/arch/CMSIS/Include/cmsis_version.h
similarity index 100%
rename from Drivers/CMSIS/Include/cmsis_version.h
rename to arch/CMSIS/Include/cmsis_version.h
diff --git a/Drivers/CMSIS/Include/core_armv81mml.h b/arch/CMSIS/Include/core_armv81mml.h
similarity index 100%
rename from Drivers/CMSIS/Include/core_armv81mml.h
rename to arch/CMSIS/Include/core_armv81mml.h
diff --git a/Drivers/CMSIS/Include/core_armv8mbl.h b/arch/CMSIS/Include/core_armv8mbl.h
similarity index 100%
rename from Drivers/CMSIS/Include/core_armv8mbl.h
rename to arch/CMSIS/Include/core_armv8mbl.h
diff --git a/Drivers/CMSIS/Include/core_armv8mml.h b/arch/CMSIS/Include/core_armv8mml.h
similarity index 100%
rename from Drivers/CMSIS/Include/core_armv8mml.h
rename to arch/CMSIS/Include/core_armv8mml.h
diff --git a/Drivers/CMSIS/Include/core_cm0.h b/arch/CMSIS/Include/core_cm0.h
similarity index 100%
rename from Drivers/CMSIS/Include/core_cm0.h
rename to arch/CMSIS/Include/core_cm0.h
diff --git a/Drivers/CMSIS/Include/core_cm0plus.h b/arch/CMSIS/Include/core_cm0plus.h
similarity index 100%
rename from Drivers/CMSIS/Include/core_cm0plus.h
rename to arch/CMSIS/Include/core_cm0plus.h
diff --git a/Drivers/CMSIS/Include/core_cm1.h b/arch/CMSIS/Include/core_cm1.h
similarity index 100%
rename from Drivers/CMSIS/Include/core_cm1.h
rename to arch/CMSIS/Include/core_cm1.h
diff --git a/Drivers/CMSIS/Include/core_cm23.h b/arch/CMSIS/Include/core_cm23.h
similarity index 100%
rename from Drivers/CMSIS/Include/core_cm23.h
rename to arch/CMSIS/Include/core_cm23.h
diff --git a/Drivers/CMSIS/Include/core_cm3.h b/arch/CMSIS/Include/core_cm3.h
similarity index 100%
rename from Drivers/CMSIS/Include/core_cm3.h
rename to arch/CMSIS/Include/core_cm3.h
diff --git a/Drivers/CMSIS/Include/core_cm33.h b/arch/CMSIS/Include/core_cm33.h
similarity index 100%
rename from Drivers/CMSIS/Include/core_cm33.h
rename to arch/CMSIS/Include/core_cm33.h
diff --git a/Drivers/CMSIS/Include/core_cm35p.h b/arch/CMSIS/Include/core_cm35p.h
similarity index 100%
rename from Drivers/CMSIS/Include/core_cm35p.h
rename to arch/CMSIS/Include/core_cm35p.h
diff --git a/Drivers/CMSIS/Include/core_cm4.h b/arch/CMSIS/Include/core_cm4.h
similarity index 100%
rename from Drivers/CMSIS/Include/core_cm4.h
rename to arch/CMSIS/Include/core_cm4.h
diff --git a/Drivers/CMSIS/Include/core_cm7.h b/arch/CMSIS/Include/core_cm7.h
similarity index 100%
rename from Drivers/CMSIS/Include/core_cm7.h
rename to arch/CMSIS/Include/core_cm7.h
diff --git a/Drivers/CMSIS/Include/core_sc000.h b/arch/CMSIS/Include/core_sc000.h
similarity index 100%
rename from Drivers/CMSIS/Include/core_sc000.h
rename to arch/CMSIS/Include/core_sc000.h
diff --git a/Drivers/CMSIS/Include/core_sc300.h b/arch/CMSIS/Include/core_sc300.h
similarity index 100%
rename from Drivers/CMSIS/Include/core_sc300.h
rename to arch/CMSIS/Include/core_sc300.h
diff --git a/Drivers/CMSIS/Include/mpu_armv7.h b/arch/CMSIS/Include/mpu_armv7.h
similarity index 100%
rename from Drivers/CMSIS/Include/mpu_armv7.h
rename to arch/CMSIS/Include/mpu_armv7.h
diff --git a/Drivers/CMSIS/Include/mpu_armv8.h b/arch/CMSIS/Include/mpu_armv8.h
similarity index 100%
rename from Drivers/CMSIS/Include/mpu_armv8.h
rename to arch/CMSIS/Include/mpu_armv8.h
diff --git a/Drivers/CMSIS/Include/tz_context.h b/arch/CMSIS/Include/tz_context.h
similarity index 100%
rename from Drivers/CMSIS/Include/tz_context.h
rename to arch/CMSIS/Include/tz_context.h
diff --git a/STM32G071RBTX_FLASH.ld b/platform/stm32g0xx/STM32G071RBTX_FLASH.ld
similarity index 100%
rename from STM32G071RBTX_FLASH.ld
rename to platform/stm32g0xx/STM32G071RBTX_FLASH.ld
diff --git a/Core/Startup/startup_stm32g071rbtx.s b/platform/stm32g0xx/startup_stm32g071rbtx.s
similarity index 100%
rename from Core/Startup/startup_stm32g071rbtx.s
rename to platform/stm32g0xx/startup_stm32g071rbtx.s
diff --git a/Core/Inc/stm32g0xx_hal_conf.h b/platform/stm32g0xx/stm32g0xx_hal_conf.h
similarity index 100%
rename from Core/Inc/stm32g0xx_hal_conf.h
rename to platform/stm32g0xx/stm32g0xx_hal_conf.h
diff --git a/Core/Src/stm32g0xx_hal_msp.c b/platform/stm32g0xx/stm32g0xx_hal_msp.c
similarity index 100%
rename from Core/Src/stm32g0xx_hal_msp.c
rename to platform/stm32g0xx/stm32g0xx_hal_msp.c
diff --git a/Core/Src/stm32g0xx_it.c b/platform/stm32g0xx/stm32g0xx_it.c
similarity index 100%
rename from Core/Src/stm32g0xx_it.c
rename to platform/stm32g0xx/stm32g0xx_it.c
diff --git a/Core/Inc/stm32g0xx_it.h b/platform/stm32g0xx/stm32g0xx_it.h
similarity index 100%
rename from Core/Inc/stm32g0xx_it.h
rename to platform/stm32g0xx/stm32g0xx_it.h
diff --git a/Core/Src/syscalls.c b/platform/stm32g0xx/syscalls.c
similarity index 100%
rename from Core/Src/syscalls.c
rename to platform/stm32g0xx/syscalls.c
diff --git a/Core/Src/sysmem.c b/platform/stm32g0xx/sysmem.c
similarity index 100%
rename from Core/Src/sysmem.c
rename to platform/stm32g0xx/sysmem.c
diff --git a/Core/Src/system_stm32g0xx.c b/platform/stm32g0xx/system_stm32g0xx.c
similarity index 100%
rename from Core/Src/system_stm32g0xx.c
rename to platform/stm32g0xx/system_stm32g0xx.c