diff --git a/midi2cv/drivers/gpio.cc b/midi2cv/drivers/gpio.cc
index 191df01..6185578 100644
--- a/midi2cv/drivers/gpio.cc
+++ b/midi2cv/drivers/gpio.cc
@@ -1,10 +1,11 @@
 #include "gpio.h"
 
-#include <stm32f37x_conf.h>
-
+#include <gpio.h>
 
 void GPIO::Init() {
+  gpio_mode_setup(0, 0, 0, 0);
 }
 
-void GPIO::Write(GPIO_TypeDef* port, uint16_t pin, bool state) {
+
+void GPIO::Write() {
 }
diff --git a/midi2cv/drivers/gpio.h b/midi2cv/drivers/gpio.h
index a890880..c3be452 100644
--- a/midi2cv/drivers/gpio.h
+++ b/midi2cv/drivers/gpio.h
@@ -3,37 +3,6 @@
 
 
 #include "stmlib/stmlib.h"
-#include <stm32f37x_conf.h>
-
-#define PORT_RST_OLED GPIOB
-#define PIN_RST_OLED GPIO_Pin_0
-#define PORT_SS_DAC0 GPIOB
-#define PIN_SS_DAC0 GPIO_Pin_6
-#define PORT_SS_DAC1 GPIOB
-#define PIN_SS_DAC1 GPIO_Pin_7
-#define PORT_RST_USB GPIOB
-#define PIN_RST_USB GPIO_Pin_8
-#define PORT_SS_USB GPIOB
-#define PIN_SS_USB GPIO_Pin_9
-#define PORT_SS_OLED GPIOB
-#define PIN_SS_OLED GPIO_Pin_11
-#define PORT_SDC_OLED GPIOB
-#define PIN_SDC_OLED GPIO_Pin_12
-
-#define PORT_GATE_OUT_1 GPIOA
-#define PIN_GATE_OUT_1 GPIO_Pin_0
-#define PORT_GATE_OUT_2 GPIOA
-#define PIN_GATE_OUT_2 GPIO_Pin_1
-#define PORT_GATE_OUT_3 GPIOA
-#define PIN_GATE_OUT_3 GPIO_Pin_2
-#define PORT_GATE_OUT_4 GPIOA
-#define PIN_GATE_OUT_4 GPIO_Pin_3
-#define PORT_GATE_OUT_5 GPIOA
-#define PIN_GATE_OUT_5 GPIO_Pin_4
-#define PORT_GATE_OUT_6 GPIOA
-#define PIN_GATE_OUT_6 GPIO_Pin_5
-
-#define GPIO_PIN(x) PORT_##x, PIN_##x
 
 class GPIO {
   public:
@@ -41,7 +10,7 @@ class GPIO {
     ~GPIO() {}
 
     void Init();
-    void Write(GPIO_TypeDef* port, uint16_t pin, bool state);
+    void Write();
   private:
     DISALLOW_COPY_AND_ASSIGN(GPIO);
 };
diff --git a/stmlib b/stmlib
index b5f84c6..652beb6 160000
--- a/stmlib
+++ b/stmlib
@@ -1 +1 @@
-Subproject commit b5f84c61b8a10dbba36f0ba12877ffde4b42d199
+Subproject commit 652beb65295a3b18273cac55f1a008ae7db9a52b