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https://github.com/STMicroelectronics/STM32CubeF3.git
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302 lines
10 KiB
C
302 lines
10 KiB
C
/**
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******************************************************************************
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* @file TIM/TIM_Combined/Src/main.c
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* @author MCD Application Team
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* @brief This sample code shows how to use STM32F3xx TIM HAL API to generate
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* 3 PWM combined signals with TIM1 Channel5.
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******************************************************************************
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* @attention
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*
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* <h2><center>© Copyright (c) 2016 STMicroelectronics.
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* All rights reserved.</center></h2>
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*
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* This software component is licensed by ST under BSD 3-Clause license,
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* the "License"; You may not use this file except in compliance with the
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* License. You may obtain a copy of the License at:
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* opensource.org/licenses/BSD-3-Clause
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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 STM32F3xx_HAL_Examples
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* @{
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*/
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/** @addtogroup TIM_Combined
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* @{
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*/
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/* Private typedef -----------------------------------------------------------*/
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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 sConfig;
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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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uint16_t TimerPeriod = 0;
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uint16_t Channel1Pulse = 0, Channel2Pulse = 0, Channel3Pulse = 0, Channel5Pulse = 0;
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/* STM32F3xx 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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- Set NVIC Group Priority to 4
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- Low Level Initialization
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*/
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HAL_Init();
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/* Configure LED3 */
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BSP_LED_Init(LED3);
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/* Configure the system clock to have a system clock = 72 Mhz */
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SystemClock_Config();
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/*##-1- Configure the TIM peripheral #######################################*/
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/* ---------------------------------------------------------------------------
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Generate 3 combined PWM signals:
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TIM1 input clock (TIM1CLK) is set to APB2 clock (PCLK2)
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=> TIM1CLK = PCLK2 = SystemCoreClock
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TIM1CLK = SystemCoreClock, Prescaler = 0, TIM1 counter clock = SystemCoreClock
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SystemCoreClock is set to 72 MHz for STM32F30x devices
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The objective is to generate 3 combined PWM signal at 8.78 KHz (in center aligned mode):
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- TIM1_Period = (SystemCoreClock / (8.78*2)) - 1
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The channel 1 duty cycle is set to 50%
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The channel 2 duty cycle is set to 37.5%
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The channel 3 duty cycle is set to 25%
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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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The channel 5 is used in PWM2 mode with duty cycle set to 6.22%
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The 3 resulting signals are made of an AND logical combination of two reference PWMs:
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- Channel 1 and Channel 5
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- Channel 2 and Channel 5
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- Channel 3 and Channel 5
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Note:
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SystemCoreClock variable holds HCLK frequency and is defined in system_stm32f3xx.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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/* Compute the value to be set in ARR regiter to generate signal frequency at 8.78 Khz */
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TimerPeriod = (SystemCoreClock / 17570 ) - 1;
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/* Compute CCR1 value to generate a duty cycle at 50% for channel 1 */
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Channel1Pulse = (uint16_t) (((uint32_t) 5 * (TimerPeriod - 1)) / 10);
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/* Compute CCR2 value to generate a duty cycle at 37.5% for channel 2 */
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Channel2Pulse = (uint16_t) (((uint32_t) 375 * (TimerPeriod - 1)) / 1000);
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/* Compute CCR3 value to generate a duty cycle at 25% for channel 3 */
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Channel3Pulse = (uint16_t) (((uint32_t) 25 * (TimerPeriod - 1)) / 100);
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/* Compute CCR5 value to generate a duty cycle at 6.22% for channel 5 (in PWM2)*/
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Channel5Pulse = (uint16_t) (((uint32_t) 622 * (TimerPeriod - 1)) / 10000);
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/* Initialize Timer TIM1 */
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TimHandle.Instance = TIM1;
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TimHandle.Init.Prescaler = 0;
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TimHandle.Init.Period = TimerPeriod;
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TimHandle.Init.ClockDivision = 0;
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TimHandle.Init.CounterMode = TIM_COUNTERMODE_CENTERALIGNED1;
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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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/* Channels 1 configuration on TIM1 */
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sConfig.OCMode = TIM_OCMODE_PWM1;
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sConfig.Pulse = Channel1Pulse;
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sConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
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sConfig.OCNPolarity = TIM_OCNPOLARITY_HIGH;
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sConfig.OCFastMode = TIM_OCFAST_DISABLE;
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sConfig.OCIdleState = TIM_OCIDLESTATE_RESET;
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sConfig.OCNIdleState = TIM_OCNIDLESTATE_RESET;
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if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, 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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/* Channels 2 configuration on TIM1 */
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sConfig.Pulse = Channel2Pulse;
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if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, 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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/* Channels 3 configuration on TIM1 */
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sConfig.Pulse = Channel3Pulse;
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if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, 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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/* Channels 5 configuration on TIM1 */
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sConfig.OCMode = TIM_OCMODE_PWM2;
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sConfig.Pulse = Channel5Pulse;
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if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_5) != 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- Group channel 5 and channels 1, 2 and 3 ############################*/
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if(HAL_TIMEx_GroupChannel5(&TimHandle, (TIM_GROUPCH5_OC1REFC |\
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TIM_GROUPCH5_OC2REFC |\
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TIM_GROUPCH5_OC3REFC)) != 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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/*##-4- Start PWM signals generation #######################################*/
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/* Start TIM1 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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/* PWM Generation Error */
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Error_Handler();
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}
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/* Start TIM1 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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/* PWM Generation Error */
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Error_Handler();
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}
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/* Start TIM1 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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/* PWM Generation Error */
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Error_Handler();
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}
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/* Start TIM1 channel 5 */
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if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_5) != HAL_OK)
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{
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/* PWM Generation 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 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 LED3 on */
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BSP_LED_On(LED3);
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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 (HSE)
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* SYSCLK(Hz) = 72000000
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* HCLK(Hz) = 72000000
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* AHB Prescaler = 1
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* APB1 Prescaler = 2
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* APB2 Prescaler = 1
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* HSE Frequency(Hz) = 8000000
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* HSE PREDIV = 1
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* PLLMUL = RCC_PLL_MUL9 (9)
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* Flash Latency(WS) = 2
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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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/* Enable HSE Oscillator and activate PLL with HSE as source */
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RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
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RCC_OscInitStruct.HSEState = RCC_HSE_ON;
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RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
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RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
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RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
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RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;
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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, PCLK1 and PCLK2
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clocks dividers */
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RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
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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_DIV2;
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RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
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if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2)!= HAL_OK)
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{
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Error_Handler();
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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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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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