329 lines
8.9 KiB
C
329 lines
8.9 KiB
C
/* USER CODE BEGIN Header */
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/**
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******************************************************************************
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* @file HAL/HAL_TimeBase/Src/main.c
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* @author MCD Application Team
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* @brief This example describes how to configure HAL time base using
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* the STM32WLxx HAL API.
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2020 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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/* USER CODE END Header */
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/* Includes ------------------------------------------------------------------*/
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#include "main.h"
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/* Private includes ----------------------------------------------------------*/
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/* USER CODE BEGIN Includes */
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/* USER CODE END Includes */
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/* Private typedef -----------------------------------------------------------*/
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/* USER CODE BEGIN PTD */
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/* USER CODE END PTD */
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/* Private define ------------------------------------------------------------*/
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/* USER CODE BEGIN PD */
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/* USER CODE END PD */
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/* Private macro -------------------------------------------------------------*/
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/* USER CODE BEGIN PM */
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/* USER CODE END PM */
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/* Private variables ---------------------------------------------------------*/
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/* USER CODE BEGIN PV */
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TIM_HandleTypeDef htim2;
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/* Private variables ---------------------------------------------------------*/
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uint32_t uwIncrementState = 0;
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/* USER CODE END PV */
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/* Private function prototypes -----------------------------------------------*/
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void SystemClock_Config(void);
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/* USER CODE BEGIN PFP */
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/* Private function prototypes -----------------------------------------------*/
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/* USER CODE END PFP */
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/* Private user code ---------------------------------------------------------*/
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/* USER CODE BEGIN 0 */
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/* USER CODE END 0 */
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/**
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* @brief The application entry point.
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* @retval int
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*/
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int main(void)
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{
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/* USER CODE BEGIN 1 */
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/* USER CODE END 1 */
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/* MCU Configuration--------------------------------------------------------*/
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/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
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HAL_Init();
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/* USER CODE BEGIN Init */
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/* USER CODE END Init */
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/* Configure the system clock */
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SystemClock_Config();
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/* USER CODE BEGIN SysInit */
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/* USER CODE END SysInit */
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/* Initialize all configured peripherals */
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/* USER CODE BEGIN 2 */
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/* Configure LED2 */
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BSP_LED_Init(LED2);
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/* Configure User push-button */
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BSP_PB_Init(BUTTON_SW1, BUTTON_MODE_EXTI);
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/* USER CODE END 2 */
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/* Infinite loop */
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/* USER CODE BEGIN WHILE */
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while (1)
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{
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/* USER CODE END WHILE */
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/* USER CODE BEGIN 3 */
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/* Insert a 1s delay */
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HAL_Delay(1000);
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/* Toggle LED2 */
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BSP_LED_Toggle(LED2);
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}
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/* USER CODE END 3 */
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}
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/**
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* @brief System Clock Configuration
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* @retval None
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*/
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void SystemClock_Config(void)
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{
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RCC_OscInitTypeDef RCC_OscInitStruct = {0};
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RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
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/** Configure the main internal regulator output voltage
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*/
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__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
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/** Initializes the CPU, AHB and APB busses clocks
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*/
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RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSI;
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RCC_OscInitStruct.MSIState = RCC_MSI_ON;
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RCC_OscInitStruct.MSICalibrationValue = RCC_MSICALIBRATION_DEFAULT;
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RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_11;
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RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
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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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/** Configure the SYSCLKSource, HCLK, PCLK1 and PCLK2 clocks dividers
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*/
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RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK3|RCC_CLOCKTYPE_HCLK
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|RCC_CLOCKTYPE_SYSCLK|RCC_CLOCKTYPE_PCLK1
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|RCC_CLOCKTYPE_PCLK2;
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RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_MSI;
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RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
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RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
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RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
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RCC_ClkInitStruct.AHBCLK3Divider = RCC_SYSCLK_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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/* USER CODE BEGIN 4 */
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/**
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* @brief This function configures the TIM2 as a time base source.
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* The time source is configured to have 1ms time base with a dedicated
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* Tick interrupt priority.
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* @note This function is called automatically at the beginning of program after
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* reset by HAL_Init() or at any time when clock is configured, by HAL_RCC_ClockConfig().
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* @param TickPriority: Tick interrupt priority.
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* @retval HAL status
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*/
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HAL_StatusTypeDef HAL_InitTick (uint32_t TickPriority)
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{
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RCC_ClkInitTypeDef clkconfig;
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uint32_t uwTimclock, uwAPB1Prescaler = 0;
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uint32_t uwPrescalerValue = 0;
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uint32_t pFLatency;
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/*Configure the TIM2 IRQ priority */
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HAL_NVIC_SetPriority(TIM2_IRQn, TickPriority ,0);
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/* Enable the TIM2 global Interrupt */
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HAL_NVIC_EnableIRQ(TIM2_IRQn);
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/* Enable TIM2 clock */
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__HAL_RCC_TIM2_CLK_ENABLE();
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/* Get clock configuration */
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HAL_RCC_GetClockConfig(&clkconfig, &pFLatency);
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/* Get APB1 prescaler */
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uwAPB1Prescaler = clkconfig.APB1CLKDivider;
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/* Compute TIM2 clock */
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if (uwAPB1Prescaler == RCC_HCLK_DIV1)
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{
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uwTimclock = HAL_RCC_GetPCLK1Freq();
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}
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else
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{
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uwTimclock = 2*HAL_RCC_GetPCLK1Freq();
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}
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/* Compute the prescaler value to have TIM2 counter clock equal to 1MHz */
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uwPrescalerValue = (uint32_t) ((uwTimclock / 1000000) - 1);
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/* Initialize TIM2 */
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htim2.Instance = TIM2;
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/* Initialize TIMx peripheral as follow:
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+ Period = [(TIM2CLK/1000) - 1]. to have a (1/1000) s time base.
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+ Prescaler = (uwTimclock/1000000 - 1) to have a 1MHz counter clock.
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+ ClockDivision = 0
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+ Counter direction = Up
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*/
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htim2.Init.Period = (1000000 / 1000) - 1;
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htim2.Init.Prescaler = uwPrescalerValue;
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htim2.Init.ClockDivision = 0;
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htim2.Init.CounterMode = TIM_COUNTERMODE_UP;
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if(HAL_TIM_Base_Init(&htim2) != 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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/* Start the TIM time Base generation in interrupt mode */
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if(HAL_TIM_Base_Start_IT(&htim2) != 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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/* Return function status */
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return HAL_OK;
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}
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/**
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* @brief Suspend Tick increment.
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* @note Disable the tick increment by disabling TIM2 update interrupt.
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* @param None
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* @retval None
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*/
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void HAL_SuspendTick(void)
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{
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/* Disable TIM2 update Interrupt */
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__HAL_TIM_DISABLE_IT(&htim2, TIM_IT_UPDATE);
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}
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/**
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* @brief Resume Tick increment.
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* @note Enable the tick increment by Enabling TIM2 update interrupt.
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* @param None
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* @retval None
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*/
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void HAL_ResumeTick(void)
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{
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/* Enable TIM2 Update interrupt */
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__HAL_TIM_ENABLE_IT(&htim2, TIM_IT_UPDATE);
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}
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/**
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* @brief Period elapsed callback in non blocking mode
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* @note This function is called when TIM2 interrupt took place, inside
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* HAL_TIM_IRQHandler(). It makes a direct call to HAL_IncTick() to increment
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* a global variable "uwTick" used as application time base.
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* @param htim : TIM handle
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* @retval None
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*/
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void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
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{
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HAL_IncTick();
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}
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/**
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* @brief EXTI line detection callback.
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* @param GPIO_Pin: Specifies the pins connected EXTI line
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* @retval None
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*/
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void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
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{
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if(GPIO_Pin == BUTTON_SW1_PIN)
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{
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if (uwIncrementState == 0)
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{
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/* Suspend tick increment */
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HAL_SuspendTick();
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/* Change the Push button state */
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uwIncrementState = 1;
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}
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else
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{
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/* Resume tick increment */
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HAL_ResumeTick();
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/* Change the Push button state */
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uwIncrementState = 0;
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}
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}
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}
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/* USER CODE END 4 */
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/**
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* @brief This function is executed in case of error occurrence.
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* @retval None
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*/
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void Error_Handler(void)
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{
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/* USER CODE BEGIN Error_Handler_Debug */
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/* User can add his own implementation to report the HAL error return state */
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while(1)
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{
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}
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/* USER CODE END Error_Handler_Debug */
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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 CODE BEGIN 6 */
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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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/* USER CODE END 6 */
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}
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#endif /* USE_FULL_ASSERT */
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