diff --git a/src/stm32f0xx_it.c b/src/stm32f0xx_it.c
--- a/src/stm32f0xx_it.c
+++ b/src/stm32f0xx_it.c
@@ -1,105 +1,37 @@
-/**
-  ******************************************************************************
-  * @file    stm32f0xx_it.c
-  * @brief   Interrupt Service Routines.
-  ******************************************************************************
-  *
-  * COPYRIGHT(c) 2016 STMicroelectronics
-  *
-  * Redistribution and use in source and binary forms, with or without modification,
-  * are permitted provided that the following conditions are met:
-  *   1. Redistributions of source code must retain the above copyright notice,
-  *      this list of conditions and the following disclaimer.
-  *   2. Redistributions in binary form must reproduce the above copyright notice,
-  *      this list of conditions and the following disclaimer in the documentation
-  *      and/or other materials provided with the distribution.
-  *   3. Neither the name of STMicroelectronics nor the names of its contributors
-  *      may be used to endorse or promote products derived from this software
-  *      without specific prior written permission.
-  *
-  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
-  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
-  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
-  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
-  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
-  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-  *
-  ******************************************************************************
-  */
-/* Includes ------------------------------------------------------------------*/
+//
+// Interrupts: all global ISRs
+//
+
 #include "stm32f0xx_hal.h"
 #include "stm32f0xx.h"
 #include "stm32f0xx_it.h"
-
-/* USER CODE BEGIN 0 */
+#include "gpio.h"
 
-/* USER CODE END 0 */
-
-/* External variables --------------------------------------------------------*/
 extern DMA_HandleTypeDef hdma_usart1_rx;
 extern DMA_HandleTypeDef hdma_usart1_tx;
 extern UART_HandleTypeDef huart1;
+extern TIM_HandleTypeDef htim1;
+extern volatile uint8_t proceed;
 
-/******************************************************************************/
-/*            Cortex-M0 Processor Interruption and Exception Handlers         */ 
-/******************************************************************************/
-
-/**
-* @brief This function handles System tick timer.
-*/
 void SysTick_Handler(void)
 {
-  /* USER CODE BEGIN SysTick_IRQn 0 */
-
-  /* USER CODE END SysTick_IRQn 0 */
-  HAL_IncTick();
-  HAL_SYSTICK_IRQHandler();
-  /* USER CODE BEGIN SysTick_IRQn 1 */
-
-  /* USER CODE END SysTick_IRQn 1 */
+    HAL_IncTick();
+    HAL_SYSTICK_IRQHandler();
 }
 
-/******************************************************************************/
-/* STM32F0xx Peripheral Interrupt Handlers                                    */
-/* Add here the Interrupt Handlers for the used peripherals.                  */
-/* For the available peripheral interrupt handler names,                      */
-/* please refer to the startup file (startup_stm32f0xx.s).                    */
-/******************************************************************************/
-
-/**
-* @brief This function handles DMA1 channel 2 and 3 interrupts.
-*/
 void DMA1_Channel2_3_IRQHandler(void)
 {
-  /* USER CODE BEGIN DMA1_Channel2_3_IRQn 0 */
-
-  /* USER CODE END DMA1_Channel2_3_IRQn 0 */
-  HAL_DMA_IRQHandler(&hdma_usart1_tx);
-  HAL_DMA_IRQHandler(&hdma_usart1_rx);
-  /* USER CODE BEGIN DMA1_Channel2_3_IRQn 1 */
-
-  /* USER CODE END DMA1_Channel2_3_IRQn 1 */
+    HAL_DMA_IRQHandler(&hdma_usart1_tx);
+    HAL_DMA_IRQHandler(&hdma_usart1_rx);
 }
 
-/**
-* @brief This function handles USART1 global interrupt / USART1 wake-up interrupt through EXTI line 25.
-*/
 void USART1_IRQHandler(void)
 {
-  /* USER CODE BEGIN USART1_IRQn 0 */
-
-  /* USER CODE END USART1_IRQn 0 */
-  HAL_UART_IRQHandler(&huart1);
-  /* USER CODE BEGIN USART1_IRQn 1 */
-
-  /* USER CODE END USART1_IRQn 1 */
+    HAL_UART_IRQHandler(&huart1);
 }
 
-/* USER CODE BEGIN 1 */
-
-/* USER CODE END 1 */
-/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
+void TIM1_BRK_UP_TRG_COM_IRQHandler(void)
+{
+    proceed = 1;
+    HAL_TIM_IRQHandler(&htim1);
+}