387 lines
10 KiB
C
387 lines
10 KiB
C
/* USER CODE BEGIN Header */
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/**
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******************************************************************************
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* @file Examples_LL/PWR/PWR_EnterStandbyMode/Src/main.c
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* @author MCD Application Team
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* @brief This example describes how to enter and exit the Standby mode with
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* a wakeup pin or external reset through the STM32WLxx PWR LL 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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#define BUTTON_MODE_GPIO 0
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#define BUTTON_MODE_EXTI 1
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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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/* USER CODE END PV */
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/* Private function prototypes -----------------------------------------------*/
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void SystemClock_Config(void);
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static void MX_GPIO_Init(void);
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/* USER CODE BEGIN PFP */
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void Configure_PWR(void);
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void LED_Blinking(uint32_t Period);
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void UserButton_Init(uint32_t Button_Mode);
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uint32_t UserButton_GetState(void);
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void EnterStandbyMode(void);
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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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/* System interrupt init*/
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NVIC_SetPriorityGrouping(NVIC_PRIORITYGROUP_4);
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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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/* Initialize User push-button (B1) in GPIO mode */
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UserButton_Init(BUTTON_MODE_GPIO);
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/* USER CODE END SysInit */
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/* Initialize all configured peripherals */
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MX_GPIO_Init();
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/* USER CODE BEGIN 2 */
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/* Initialize User push-button (B1) in EXTI mode */
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UserButton_Init(BUTTON_MODE_EXTI);
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/* Configure Power IP */
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Configure_PWR();
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/* Led blinking in Run mode */
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LED_Blinking(LED_BLINK_FAST);
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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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}
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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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LL_FLASH_SetLatency(LL_FLASH_LATENCY_0);
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while(LL_FLASH_GetLatency() != LL_FLASH_LATENCY_0)
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{
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}
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LL_PWR_SetRegulVoltageScaling(LL_PWR_REGU_VOLTAGE_SCALE2);
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LL_RCC_HSI_Enable();
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/* Wait till HSI is ready */
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while(LL_RCC_HSI_IsReady() != 1)
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{
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}
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LL_RCC_HSI_SetCalibTrimming(64);
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LL_RCC_SetSysClkSource(LL_RCC_SYS_CLKSOURCE_HSI);
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/* Wait till System clock is ready */
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while(LL_RCC_GetSysClkSource() != LL_RCC_SYS_CLKSOURCE_STATUS_HSI)
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{
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}
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LL_RCC_SetAHBPrescaler(LL_RCC_SYSCLK_DIV_1);
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LL_RCC_SetAHB3Prescaler(LL_RCC_SYSCLK_DIV_1);
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LL_RCC_SetAPB1Prescaler(LL_RCC_APB1_DIV_1);
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LL_RCC_SetAPB2Prescaler(LL_RCC_APB2_DIV_1);
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LL_Init1msTick(16000000);
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/* Update CMSIS variable (which can be updated also through SystemCoreClockUpdate function) */
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LL_SetSystemCoreClock(16000000);
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}
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/**
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* @brief GPIO Initialization Function
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* @param None
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* @retval None
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*/
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static void MX_GPIO_Init(void)
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{
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LL_GPIO_InitTypeDef GPIO_InitStruct = {0};
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/* GPIO Ports Clock Enable */
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LL_AHB2_GRP1_EnableClock(LL_AHB2_GRP1_PERIPH_GPIOB);
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/**/
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LL_GPIO_ResetOutputPin(LED2_GPIO_Port, LED2_Pin);
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/**/
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GPIO_InitStruct.Pin = LED2_Pin;
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GPIO_InitStruct.Mode = LL_GPIO_MODE_OUTPUT;
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GPIO_InitStruct.Speed = LL_GPIO_SPEED_FREQ_LOW;
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GPIO_InitStruct.OutputType = LL_GPIO_OUTPUT_PUSHPULL;
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GPIO_InitStruct.Pull = LL_GPIO_PULL_NO;
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LL_GPIO_Init(LED2_GPIO_Port, &GPIO_InitStruct);
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}
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/* USER CODE BEGIN 4 */
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/**
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* @brief Set LED2 to Blinking mode for an infinite loop (toggle period based on value provided as input parameter).
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* @param Period : Period of time (in ms) between each toggling of LED
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* This parameter can be user defined values. Pre-defined values used in that example are :
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* @arg LED_BLINK_FAST : Fast Blinking
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* @arg LED_BLINK_SLOW : Slow Blinking
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* @arg LED_BLINK_ERROR : Error specific Blinking
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* @retval None
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*/
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void LED_Blinking(uint32_t Period)
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{
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/* Toggle IO in an infinite loop */
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while (1)
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{
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LL_GPIO_TogglePin(LED2_GPIO_Port, LED2_Pin);
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LL_mDelay(Period);
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}
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}
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/**
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* @brief Configures User push-button (B1) in GPIO or EXTI Line Mode.
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* @param ButtonMode: Specifies Button mode.
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* This parameter can be one of following parameters:
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* @arg BUTTON_MODE_GPIO: Button will be used as simple IO
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* @arg BUTTON_MODE_EXTI: Button will be connected to EXTI line with interrupt
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* generation capability
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* @retval None
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*/
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void UserButton_Init(uint32_t Button_Mode)
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{
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/* Enable the BUTTON Clock */
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USER_BUTTON_GPIO_CLK_ENABLE();
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/* Configure GPIO for BUTTON */
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LL_GPIO_SetPinMode(USER_BUTTON_GPIO_PORT, USER_BUTTON_PIN, LL_GPIO_MODE_INPUT);
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LL_GPIO_SetPinPull(USER_BUTTON_GPIO_PORT, USER_BUTTON_PIN, LL_GPIO_PULL_UP);
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if(Button_Mode == BUTTON_MODE_EXTI)
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{
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/* Connect External Line to the GPIO */
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USER_BUTTON_SYSCFG_SET_EXTI();
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/* Enable a falling trigger EXTI line 13 Interrupt */
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USER_BUTTON_EXTI_LINE_ENABLE();
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USER_BUTTON_EXTI_FALLING_TRIG_ENABLE();
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/* Configure NVIC for USER_BUTTON_EXTI_IRQn */
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NVIC_EnableIRQ(USER_BUTTON_EXTI_IRQn);
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NVIC_SetPriority(USER_BUTTON_EXTI_IRQn,0x03);
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}
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}
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/**
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* @brief Returns the selected Button state.
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* @param None
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* @retval The Button GPIO pin value.
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*/
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uint32_t UserButton_GetState(void)
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{
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return LL_GPIO_IsInputPinSet(USER_BUTTON_GPIO_PORT, USER_BUTTON_PIN);
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}
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/**
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* @brief Function to configure and initialize PWR IP.
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* @param None
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* @retval None
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*/
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void Configure_PWR(void)
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{
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/* Check if the system was resumed from Standby mode */
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if(LL_PWR_IsActiveFlag_C1SB() != 0)
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{
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/* Clear Standby flag */
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LL_PWR_ClearFlag_C1STOP_C1STB();
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/* Change LED speed to SLOW to indicate exit from Standby mode */
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LED_Blinking(LED_BLINK_SLOW);
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/* Wait that user release the User push-button (B1) */
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while(UserButton_GetState() == 0){}
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}
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/* Check and Clear the Wakeup flag */
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if (LL_PWR_IsActiveFlag_WU1() != 0)
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{
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LL_PWR_ClearFlag_WU1();
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}
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}
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/**
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* @brief Function to configure and enter in Standby Mode.
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* @param None
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* @retval None
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*/
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void EnterStandbyMode(void)
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{
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/* Wait that user release the User push-button (B1) */
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while(UserButton_GetState() == 0){}
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/* Turn-off LED */
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/* Note: LED state at this step depends on blinking state at the instant of user button is pressed. */
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LL_GPIO_ResetOutputPin(GPIOB, LL_GPIO_PIN_9);
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/* Disable all used wakeup sources */
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LL_PWR_DisableWakeUpPin(LL_PWR_WAKEUP_PIN1);
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/* Clear all wake up Flag */
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LL_PWR_ClearFlag_WU();
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/* Enable pull up on wakeup pin */
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/* Note: Setting not mandatory but recommended since there is no external pulling resistor on pin PA0 on STM32WL Nucleo board */
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LL_PWR_EnableGPIOPullUp(LL_PWR_GPIO_A, LL_PWR_GPIO_BIT_0);
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/* Enable pull-up and pull-down configuration for CPU1 */
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LL_PWR_EnablePUPDCfg();
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/* Enable wakeup pin */
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LL_PWR_EnableWakeUpPin(LL_PWR_WAKEUP_PIN1);
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/* As default User push-button (B1) state is high level, need to clear all wake up Flag again */
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LL_PWR_ClearFlag_WU();
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/** Request to enter Standby mode
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* Following procedure describe in STM32WLxx Reference Manual
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* See PWR part, section Low-power modes, Standby mode
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*/
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/* Set Standby mode when CPU enters deepsleep */
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LL_PWR_SetPowerMode(LL_PWR_MODE_STANDBY);
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/* Set SLEEPDEEP bit of Cortex System Control Register */
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LL_LPM_EnableDeepSleep();
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/* This option is used to ensure that store operations are completed */
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#if defined ( __CC_ARM)
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__force_stores();
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#endif
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/* Request Wait For Interrupt */
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__WFI();
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}
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/******************************************************************************/
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/* USER IRQ HANDLER TREATMENT */
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/******************************************************************************/
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/**
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* @brief Function to manage BUTTON IRQ Handler
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* @param None
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* @retval None
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*/
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void UserButton_Callback(void)
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{
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/* Turn LED off */
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LL_GPIO_ResetOutputPin(LED2_GPIO_Port, LED2_Pin);
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/* Configure and enter in Standby Mode */
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EnterStandbyMode();
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/* Here Device is in Standby mode */
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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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/* 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", 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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/* USER CODE END 6 */
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}
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#endif /* USE_FULL_ASSERT */
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