text: /**
    ******************************************************************************
    * @file    TIM/6Steps/stm32f10x_it.c 
    * @author  MCD Application Team
    * @version V3.6.0
    * @date    20-September-2021
    * @brief   Main Interrupt Service Routines.
    *          This file provides template for all exceptions handler and peripherals
    *          interrupt service routine.
    ******************************************************************************
    * @attention
    *
    * Copyright (c) 2011 STMicroelectronics.
    * All rights reserved.
    *
    * This software is licensed under terms that can be found in the LICENSE file
    * in the root directory of this software component.
    * If no LICENSE file comes with this software, it is provided AS-IS.
    *
    ******************************************************************************
    */
  
  /* Includes ------------------------------------------------------------------*/
  #include "stm32f10x_it.h"
  
  /** @addtogroup STM32F10x_StdPeriph_Examples
    * @{
    */
  
  /** @addtogroup TIM_6Steps
    * @{
    */ 
  
  /* Private typedef -----------------------------------------------------------*/
  /* Private define ------------------------------------------------------------*/
  /* Private macro -------------------------------------------------------------*/
  /* Private variables ---------------------------------------------------------*/
  __IO uint32_t step = 1;
  
  /* Private function prototypes -----------------------------------------------*/
  /* Private functions ---------------------------------------------------------*/
  
  /******************************************************************************/
  /*            Cortex-M3 Processor Exceptions Handlers                         */
  /******************************************************************************/
  
  /**
    * @brief  This function handles NMI exception.
    * @param  None
    * @retval None
    */
  void NMI_Handler(void)
  {
  }
  
  /**
    * @brief  This function handles Hard Fault exception.
    * @param  None
    * @retval None
    */
  void HardFault_Handler(void)
  {
    /* Go to infinite loop when Hard Fault exception occurs */
    while (1)
    {}
  }
  
  /**
    * @brief  This function handles Memory Manage exception.
    * @param  None
    * @retval None
    */
  void MemManage_Handler(void)
  {
    /* Go to infinite loop when Memory Manage exception occurs */
    while (1)
    {}
  }
  
  /**
    * @brief  This function handles Bus Fault exception.
    * @param  None
    * @retval None
    */
  void BusFault_Handler(void)
  {
    /* Go to infinite loop when Bus Fault exception occurs */
    while (1)
    {}
  }
  
  /**
    * @brief  This function handles Usage Fault exception.
    * @param  None
    * @retval None
    */
  void UsageFault_Handler(void)
  {
    /* Go to infinite loop when Usage Fault exception occurs */
    while (1)
    {}
  }
  
  /**
    * @brief  This function handles Debug Monitor exception.
    * @param  None
    * @retval None
    */
  void DebugMon_Handler(void)
  {}
  
  /**
    * @brief  This function handles SVCall exception.
    * @param  None
    * @retval None
    */
  void SVC_Handler(void)
  {}
  
  /**
    * @brief  This function handles PendSV_Handler exception.
    * @param  None
    * @retval None
    */
  void PendSV_Handler(void)
  {}
  
  /**
    * @brief  This function handles SysTick Handler.
    * @param  None
    * @retval None
    */
  void SysTick_Handler(void)
  {
    /* Generate TIM1 COM event by software */
    TIM_GenerateEvent(TIM1, TIM_EventSource_COM);
  }
  
  /******************************************************************************/
  /*            STM32F10x Peripherals Interrupt Handlers                        */
  /******************************************************************************/
  
  /**
    * @brief  This function handles TIM1 Trigger and commutation interrupts
    *   requests.
    * @param  None
    * @retval None
    */
  #if defined (STM32F10X_LD_VL) || defined (STM32F10X_MD_VL) || defined (STM32F10X_HD_VL)
  void TIM1_TRG_COM_TIM17_IRQHandler(void)
  #else
  void TIM1_TRG_COM_IRQHandler(void)
  #endif	
  {
     /* Clear TIM1 COM pending bit */
     TIM_ClearITPendingBit(TIM1, TIM_IT_COM);
  
    if (step == 1)
    {
      /* Next step: Step 2 Configuration ---------------------------- */
      /*  Channel3 configuration */
      TIM_CCxCmd(TIM1, TIM_Channel_3, TIM_CCx_Disable);
      TIM_CCxNCmd(TIM1, TIM_Channel_3, TIM_CCxN_Disable);
  
      /*  Channel1 configuration */
      TIM_SelectOCxM(TIM1, TIM_Channel_1, TIM_OCMode_PWM1);
      TIM_CCxCmd(TIM1, TIM_Channel_1, TIM_CCx_Enable);
      TIM_CCxNCmd(TIM1, TIM_Channel_1, TIM_CCxN_Disable);
  
      /*  Channel2 configuration */
      TIM_SelectOCxM(TIM1, TIM_Channel_2, TIM_OCMode_PWM1 );
      TIM_CCxCmd(TIM1, TIM_Channel_2, TIM_CCx_Disable);
      TIM_CCxNCmd(TIM1, TIM_Channel_2, TIM_CCxN_Enable);
      step++;
    }
    else if (step == 2)
    {
      /* Next step: Step 3 Configuration ---------------------------- */
      /*  Channel2 configuration */
      TIM_SelectOCxM(TIM1, TIM_Channel_2, TIM_OCMode_PWM1);
      TIM_CCxCmd(TIM1, TIM_Channel_2, TIM_CCx_Disable);
      TIM_CCxNCmd(TIM1, TIM_Channel_2, TIM_CCxN_Enable);
      
      /*  Channel3 configuration */
      TIM_SelectOCxM(TIM1, TIM_Channel_3, TIM_OCMode_PWM1);
      TIM_CCxCmd(TIM1, TIM_Channel_3, TIM_CCx_Enable);
       TIM_CCxNCmd(TIM1, TIM_Channel_3, TIM_CCxN_Disable);
  
      /*  Channel1 configuration */
      TIM_CCxCmd(TIM1, TIM_Channel_1, TIM_CCx_Disable);
      TIM_CCxNCmd(TIM1, TIM_Channel_1, TIM_CCxN_Disable);
      step++;
    }
    else if (step == 3)
    {
      /* Next step: Step 4 Configuration ---------------------------- */
      /*  Channel3 configuration */
      TIM_SelectOCxM(TIM1, TIM_Channel_3, TIM_OCMode_PWM1);
      TIM_CCxCmd(TIM1, TIM_Channel_3, TIM_CCx_Enable);
      TIM_CCxNCmd(TIM1, TIM_Channel_3, TIM_CCxN_Disable);
  
      /*  Channel2 configuration */
      TIM_CCxCmd(TIM1, TIM_Channel_2, TIM_CCx_Disable);
      TIM_CCxNCmd(TIM1, TIM_Channel_2, TIM_CCxN_Disable);
  
      /*  Channel1 configuration */
      TIM_SelectOCxM(TIM1, TIM_Channel_1, TIM_OCMode_PWM1);
      TIM_CCxCmd(TIM1, TIM_Channel_1, TIM_CCx_Disable);
      TIM_CCxNCmd(TIM1, TIM_Channel_1, TIM_CCxN_Enable);
      step++;
    }
    else if (step == 4)
    {
      /* Next step: Step 5 Configuration ---------------------------- */
      /*  Channel3 configuration */
      TIM_CCxCmd(TIM1, TIM_Channel_3, TIM_CCx_Disable);
      TIM_CCxNCmd(TIM1, TIM_Channel_3, TIM_CCxN_Disable);
  
      /*  Channel1 configuration */
      TIM_SelectOCxM(TIM1, TIM_Channel_1, TIM_OCMode_PWM1);
      TIM_CCxCmd(TIM1, TIM_Channel_1, TIM_CCx_Disable);
      TIM_CCxNCmd(TIM1, TIM_Channel_1, TIM_CCxN_Enable);
  
      /*  Channel2 configuration */
      TIM_SelectOCxM(TIM1, TIM_Channel_2, TIM_OCMode_PWM1);
      TIM_CCxCmd(TIM1, TIM_Channel_2, TIM_CCx_Enable);
      TIM_CCxNCmd(TIM1, TIM_Channel_2, TIM_CCxN_Disable);
      step++;
    }
    else if (step == 5)
    {
      /* Next step: Step 6 Configuration ---------------------------- */
      /*  Channel3 configuration */
      TIM_SelectOCxM(TIM1, TIM_Channel_3, TIM_OCMode_PWM1);
      TIM_CCxCmd(TIM1, TIM_Channel_3, TIM_CCx_Disable);
      TIM_CCxNCmd(TIM1, TIM_Channel_3, TIM_CCxN_Enable);
  
      /*  Channel1 configuration */
      TIM_CCxCmd(TIM1, TIM_Channel_1, TIM_CCx_Disable);
      TIM_CCxNCmd(TIM1, TIM_Channel_1, TIM_CCxN_Disable);
  
      /*  Channel2 configuration */
      TIM_SelectOCxM(TIM1, TIM_Channel_2, TIM_OCMode_PWM1);
      TIM_CCxCmd(TIM1, TIM_Channel_2, TIM_CCx_Enable);
      TIM_CCxNCmd(TIM1, TIM_Channel_2, TIM_CCxN_Disable);
      step++;
    }
    else
    {
      /* Next step: Step 1 Configuration ---------------------------- */
      /*  Channel1 configuration */
      TIM_SelectOCxM(TIM1, TIM_Channel_1, TIM_OCMode_PWM1);
      TIM_CCxCmd(TIM1, TIM_Channel_1, TIM_CCx_Enable);
      TIM_CCxNCmd(TIM1, TIM_Channel_2, TIM_CCxN_Disable);
  
      /*  Channel3 configuration */
      TIM_SelectOCxM(TIM1, TIM_Channel_3, TIM_OCMode_PWM1);
      TIM_CCxCmd(TIM1, TIM_Channel_3, TIM_CCx_Disable);
      TIM_CCxNCmd(TIM1, TIM_Channel_3, TIM_CCxN_Enable);
  
      /*  Channel2 configuration */
      TIM_CCxCmd(TIM1, TIM_Channel_2, TIM_CCx_Disable);
      TIM_CCxNCmd(TIM1, TIM_Channel_2, TIM_CCxN_Disable);
      step = 1;
    }
  }
  
  /******************************************************************************/
  /*                 STM32F10x Peripherals Interrupt Handlers                   */
  /*  Add here the Interrupt Handler for the used peripheral(s) (PPP), for the  */
  /*  available peripheral interrupt handler's name please refer to the startup */
  /*  file (startup_stm32f10x_xx.s).                                            */
  /******************************************************************************/
  
  /**
    * @brief  This function handles PPP interrupt request.
    * @param  None
    * @retval None
    */
  /*void PPP_IRQHandler(void)
  {
  }*/
  
  /**
    * @}
    */ 
  
  /**
    * @}
    */ 
  
  