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https://github.com/STMicroelectronics/STM32CubeF0.git
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328 lines
10 KiB
C
328 lines
10 KiB
C
/**
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******************************************************************************
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* @file TIM/TIM_ComplementarySignals/Src/main.c
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* @author MCD Application Team
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* @brief This sample code shows how to use STM32F0xx TIM HAL API to generate
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* 3 signals in PWM with its complementaries.
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2016 STMicroelectronics.
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* All rights reserved.
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*
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* This software is licensed under terms that can be found in the LICENSE file
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* in the root directory of this software component.
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* If no LICENSE file comes with this software, it is provided AS-IS.
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*
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "main.h"
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/** @addtogroup STM32F0xx_HAL_Examples
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* @{
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*/
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/** @addtogroup TIM_ComplementarySignals
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* @{
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*/
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/* Private typedef -----------------------------------------------------------*/
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#define PERIOD_VALUE (1200 - 1) /* Period Value */
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#define PULSE1_VALUE 600 /* Capture Compare 1 Value */
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#define PULSE2_VALUE 300 /* Capture Compare 2 Value */
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#define PULSE3_VALUE 150 /* Capture Compare 3 Value */
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/* Private define ------------------------------------------------------------*/
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/* Private macro -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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/* Timer handler declaration */
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TIM_HandleTypeDef TimHandle;
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/* Timer Output Compare Configuration Structure declaration */
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TIM_OC_InitTypeDef sPWMConfig;
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/* Timer Break Configuration Structure declaration */
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TIM_BreakDeadTimeConfigTypeDef sBreakConfig;
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/* Counter Prescaler value */
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uint32_t uwPrescalerValue = 0;
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/* Private function prototypes -----------------------------------------------*/
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static void SystemClock_Config(void);
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static void Error_Handler(void);
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/* Private functions ---------------------------------------------------------*/
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/**
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* @brief Main program
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* @param None
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* @retval None
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*/
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int main(void)
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{
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/* STM32F0xx HAL library initialization:
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- Configure the Flash prefetch
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- Systick timer is configured by default as source of time base, but user
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can eventually implement his proper time base source (a general purpose
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timer for example or other time source), keeping in mind that Time base
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duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and
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handled in milliseconds basis.
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- Low Level Initialization
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*/
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HAL_Init();
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/* Configure LED2 */
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BSP_LED_Init(LED2);
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/* Configure the system clock to 48 MHz */
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SystemClock_Config();
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/* Compute the prescaler value to have TIM1 counter clock equal to 12MHz */
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uwPrescalerValue = (uint32_t) ((SystemCoreClock / 12000000) - 1);
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/*##-1- Configure the TIM peripheral #######################################*/
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/* ---------------------------------------------------------------------------
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1/ Generate 3 complementary PWM signals with 3 different duty cycles:
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TIM1 input clock (TIM1CLK) is set to APB1 clock (PCLK1), since APB1
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prescaler is 1.
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TIM1CLK = PCLK1
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PCLK1 = HCLK
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=> TIM1CLK = HCLK = SystemCoreClock
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TIM1CLK is fixed to SystemCoreClock, the TIM1 Prescaler is set to have
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TIM1 counter clock = 12MHz.
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The objective is to generate PWM signal at 10 KHz:
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- TIM1_Period = (TIM1 counter clock / 10000) - 1
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The Three Duty cycles are computed as the following description:
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The channel 1 duty cycle is set to 50% so channel 1N is set to 50%.
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The channel 2 duty cycle is set to 25% so channel 2N is set to 75%.
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The channel 3 duty cycle is set to 12.5% so channel 3N is set to 87.5%.
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The Timer pulse is calculated as follows:
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- ChannelxPulse = DutyCycle * (TIM1_Period - 1) / 100
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2/ Insert a dead time equal to (100/SystemCoreClock) us
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3/ Configure the break feature, active at High level, and using the automatic
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output enable feature
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4/ Use the Locking parameters level1.
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Note:
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SystemCoreClock variable holds HCLK frequency and is defined in system_stm32f0xx.c file.
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Each time the core clock (HCLK) changes, user had to update SystemCoreClock
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variable value. Otherwise, any configuration based on this variable will be incorrect.
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This variable is updated in three ways:
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1) by calling CMSIS function SystemCoreClockUpdate()
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2) by calling HAL API function HAL_RCC_GetSysClockFreq()
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3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency
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--------------------------------------------------------------------------- */
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/* Initialize TIM peripheral as follows:
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+ Prescaler = (SystemCoreClock/12000000) - 1
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+ Period = (1200 - 1) (to have an output frequency equal to 10 KHz)
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+ ClockDivision = 0
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+ Counter direction = Up
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*/
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/* Select the Timer instance */
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TimHandle.Instance = TIM1;
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TimHandle.Init.Prescaler = uwPrescalerValue;
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TimHandle.Init.Period = PERIOD_VALUE;
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TimHandle.Init.ClockDivision = 0;
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TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
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TimHandle.Init.RepetitionCounter = 0;
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TimHandle.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
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if(HAL_TIM_PWM_Init(&TimHandle) != HAL_OK)
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{
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/* Initialization Error */
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Error_Handler();
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}
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/*##-2- Configure the PWM channels #########################################*/
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/* Common configuration for all channels */
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sPWMConfig.OCMode = TIM_OCMODE_PWM1;
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sPWMConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
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sPWMConfig.OCNPolarity = TIM_OCNPOLARITY_HIGH;
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sPWMConfig.OCIdleState = TIM_OCIDLESTATE_SET;
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sPWMConfig.OCNIdleState = TIM_OCNIDLESTATE_RESET;
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sPWMConfig.OCFastMode = TIM_OCFAST_DISABLE;
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/* Set the pulse value for channel 1 */
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sPWMConfig.Pulse = PULSE1_VALUE;
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if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sPWMConfig, TIM_CHANNEL_1) != HAL_OK)
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{
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/* Configuration Error */
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Error_Handler();
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}
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/* Set the pulse value for channel 2 */
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sPWMConfig.Pulse = PULSE2_VALUE;
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if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sPWMConfig, TIM_CHANNEL_2) != HAL_OK)
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{
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/* Configuration Error */
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Error_Handler();
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}
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/* Set the pulse value for channel 3 */
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sPWMConfig.Pulse = PULSE3_VALUE;
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if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sPWMConfig, TIM_CHANNEL_3) != HAL_OK)
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{
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/* Configuration Error */
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Error_Handler();
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}
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/* Set the Break feature & Dead time */
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sBreakConfig.BreakState = TIM_BREAK_ENABLE;
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sBreakConfig.DeadTime = 100;
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sBreakConfig.OffStateRunMode = TIM_OSSR_ENABLE;
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sBreakConfig.OffStateIDLEMode = TIM_OSSI_ENABLE;
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sBreakConfig.LockLevel = TIM_LOCKLEVEL_1;
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sBreakConfig.BreakPolarity = TIM_BREAKPOLARITY_HIGH;
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sBreakConfig.AutomaticOutput = TIM_AUTOMATICOUTPUT_ENABLE;
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if(HAL_TIMEx_ConfigBreakDeadTime(&TimHandle, &sBreakConfig) != HAL_OK)
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{
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/* Configuration Error */
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Error_Handler();
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}
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/*##-3- Start PWM signals generation #######################################*/
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/* Start channel 1 */
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if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_1) != HAL_OK)
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{
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/* Starting Error */
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Error_Handler();
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}
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/* Start channel 1N */
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if(HAL_TIMEx_PWMN_Start(&TimHandle, TIM_CHANNEL_1) != HAL_OK)
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{
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/* Starting Error */
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Error_Handler();
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}
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/* Start channel 2 */
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if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_2) != HAL_OK)
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{
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/* Starting Error */
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Error_Handler();
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}
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/* Start channel 2N */
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if(HAL_TIMEx_PWMN_Start(&TimHandle, TIM_CHANNEL_2) != HAL_OK)
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{
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/* Starting Error */
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Error_Handler();
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}
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/* Start channel 3 */
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if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_3) != HAL_OK)
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{
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/* Starting Error */
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Error_Handler();
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}
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/* Start channel 3N */
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if(HAL_TIMEx_PWMN_Start(&TimHandle, TIM_CHANNEL_3) != HAL_OK)
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{
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/* Starting Error */
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Error_Handler();
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}
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while (1)
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{
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}
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}
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/**
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* @brief System Clock Configuration
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* The system Clock is configured as follow :
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* System Clock source = PLL (HSI48)
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* SYSCLK(Hz) = 48000000
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* HCLK(Hz) = 48000000
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* AHB Prescaler = 1
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* APB1 Prescaler = 1
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* HSI Frequency(Hz) = 48000000
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* PREDIV = 2
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* PLLMUL = 2
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* Flash Latency(WS) = 1
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* @param None
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* @retval None
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*/
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static void SystemClock_Config(void)
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{
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RCC_ClkInitTypeDef RCC_ClkInitStruct;
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RCC_OscInitTypeDef RCC_OscInitStruct;
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/* Select HSI48 Oscillator as PLL source */
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RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI48;
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RCC_OscInitStruct.HSI48State = RCC_HSI48_ON;
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RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
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RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI48;
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RCC_OscInitStruct.PLL.PREDIV = RCC_PREDIV_DIV2;
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RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL2;
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if (HAL_RCC_OscConfig(&RCC_OscInitStruct)!= HAL_OK)
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{
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Error_Handler();
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}
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/* Select PLL as system clock source and configure the HCLK and PCLK1 clocks dividers */
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RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1);
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RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
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RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
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RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
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if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1)!= HAL_OK)
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{
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Error_Handler();
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}
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}
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/**
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* @brief This function is executed in case of error occurrence.
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* @param None
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* @retval None
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*/
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static void Error_Handler(void)
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{
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/* Turn LED2 on */
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BSP_LED_On(LED2);
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while (1)
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{
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}
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}
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#ifdef USE_FULL_ASSERT
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/**
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* @brief Reports the name of the source file and the source line number
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* where the assert_param error has occurred.
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* @param file: pointer to the source file name
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* @param line: assert_param error line source number
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* @retval None
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*/
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void assert_failed(uint8_t *file, uint32_t line)
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{
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/* User can add his own implementation to report the file name and line number,
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ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
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/* Infinite loop */
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while (1)
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{
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}
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}
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#endif
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/**
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* @}
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*/
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/**
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* @}
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*/
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