diff --git a/Core/Src/stm32f1xx_it.c b/Core/Src/stm32f1xx_it.c
index b05afac..eff17e3 100644
--- a/Core/Src/stm32f1xx_it.c
+++ b/Core/Src/stm32f1xx_it.c
@@ -91,7 +91,7 @@ void NMI_Handler(void)
 void HardFault_Handler(void)
 {
   /* USER CODE BEGIN HardFault_IRQn 0 */
-
+	Log(fatal,"HardFault_Handler");
   /* USER CODE END HardFault_IRQn 0 */
   while (1)
   {
@@ -106,7 +106,7 @@ void HardFault_Handler(void)
 void MemManage_Handler(void)
 {
   /* USER CODE BEGIN MemoryManagement_IRQn 0 */
-
+	Log(fatal,"MemManage_Handler");
   /* USER CODE END MemoryManagement_IRQn 0 */
   while (1)
   {
@@ -121,7 +121,7 @@ void MemManage_Handler(void)
 void BusFault_Handler(void)
 {
   /* USER CODE BEGIN BusFault_IRQn 0 */
-
+	Log(fatal,"BusFault_Handler");
   /* USER CODE END BusFault_IRQn 0 */
   while (1)
   {
@@ -136,7 +136,7 @@ void BusFault_Handler(void)
 void UsageFault_Handler(void)
 {
   /* USER CODE BEGIN UsageFault_IRQn 0 */
-
+	Log(fatal,"UsageFault_Handler");
   /* USER CODE END UsageFault_IRQn 0 */
   while (1)
   {
@@ -248,6 +248,20 @@ void EXTI3_IRQHandler(void)
   /* USER CODE END EXTI3_IRQn 1 */
 }
 
+/**
+  * @brief This function handles EXTI line4 interrupt.
+  */
+void EXTI4_IRQHandler(void)
+{
+  /* USER CODE BEGIN EXTI4_IRQn 0 */
+
+  /* USER CODE END EXTI4_IRQn 0 */
+  HAL_GPIO_EXTI_IRQHandler(GPIO_PIN_4);
+  /* USER CODE BEGIN EXTI4_IRQn 1 */
+
+  /* USER CODE END EXTI4_IRQn 1 */
+}
+
 /**
   * @brief This function handles DMA1 channel1 global interrupt.
   */