mirror of
https://github.com/STMicroelectronics/STM32CubeF4.git
synced 2025-05-03 22:17:07 +08:00
272 lines
7.8 KiB
C
272 lines
7.8 KiB
C
/**
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******************************************************************************
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* @file Examples_LL/PWR/PWR_EnterStopMode/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 STOP_MAINREGU mode
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* through the STM32F4xx PWR LL API.
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2017 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 STM32F4xx_LL_Examples
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* @{
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*/
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/** @addtogroup PWR_EnterStopMode
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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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/* Private function prototypes -----------------------------------------------*/
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void SystemClock_Config(void);
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void Configure_PWR(void);
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void LED_Init(void);
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void LED_Off(void);
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void LED_Blinking_5s(void);
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void EnterSTOP_MAINREGUMode(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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/* Configure the system clock to 100 MHz */
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SystemClock_Config();
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/* Initialize LED2 */
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LED_Init();
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/* Configure Power IP */
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Configure_PWR();
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/* Led blinking during 5s in RUN mode */
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LED_Blinking_5s();
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/* Switch OFF LED2 */
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LED_Off();
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/* Enter STOP_MAINREGU mode */
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EnterSTOP_MAINREGUMode();
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/* Here Device is in STOP_MAINREGU mode */
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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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/**
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* @brief Initialize LED2.
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* @param None
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* @retval None
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*/
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void LED_Init(void)
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{
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/* Enable the LED2 Clock */
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LED2_GPIO_CLK_ENABLE();
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/* Configure IO in output push-pull mode to drive external LED2 */
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LL_GPIO_SetPinMode(LED2_GPIO_PORT, LED2_PIN, LL_GPIO_MODE_OUTPUT);
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/* Reset value is LL_GPIO_OUTPUT_PUSHPULL */
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//LL_GPIO_SetPinOutputType(LED2_GPIO_PORT, LED2_PIN, LL_GPIO_OUTPUT_PUSHPULL);
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/* Reset value is LL_GPIO_SPEED_FREQ_LOW */
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//LL_GPIO_SetPinSpeed(LED2_GPIO_PORT, LED2_PIN, LL_GPIO_SPEED_FREQ_LOW);
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/* Reset value is LL_GPIO_PULL_NO */
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//LL_GPIO_SetPinPull(LED2_GPIO_PORT, LED2_PIN, LL_GPIO_PULL_NO);
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}
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/**
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* @brief Turn-off LED2.
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* @param None
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* @retval None
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*/
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void LED_Off(void)
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{
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/* Turn LED2 off */
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LL_GPIO_ResetOutputPin(LED2_GPIO_PORT, LED2_PIN);
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}
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/**
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* @brief Set LED2 to Blinking mode during 5s.
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* @param None
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* @retval None
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*/
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void LED_Blinking_5s(void)
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{
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uint32_t i = 0;
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/* Toggle IO in during 5s (25*200ms) */
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for(i = 0; i < 25; i++)
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{
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LL_GPIO_TogglePin(LED2_GPIO_PORT, LED2_PIN);
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LL_mDelay(200);
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}
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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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/* Enable Power Clock */
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LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_PWR);
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}
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/**
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* @brief Function to configure and enter in STOP_MAINREGU Mode.
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* @param None
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* @retval None
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*/
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void EnterSTOP_MAINREGUMode(void)
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{
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LL_GPIO_InitTypeDef gpio_initstruct = {LL_GPIO_PIN_ALL, LL_GPIO_MODE_ANALOG,
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LL_GPIO_SPEED_FREQ_HIGH, LL_GPIO_OUTPUT_PUSHPULL,
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LL_GPIO_PULL_NO, LL_GPIO_AF_0};
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/* Set all GPIO in analog state to reduce power consumption, */
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/* Note: Debug using ST-Link is not possible during the execution of this */
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/* example because communication between ST-link and the device */
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/* under test is done through UART. All GPIO pins are disabled (set */
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/* to analog input mode) including UART I/O pins. */
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LL_AHB1_GRP1_EnableClock(LL_AHB1_GRP1_PERIPH_GPIOA |
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LL_AHB1_GRP1_PERIPH_GPIOB |
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LL_AHB1_GRP1_PERIPH_GPIOC |
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LL_AHB1_GRP1_PERIPH_GPIOD |
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LL_AHB1_GRP1_PERIPH_GPIOE |
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LL_AHB1_GRP1_PERIPH_GPIOH);
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LL_GPIO_Init(GPIOA, &gpio_initstruct);
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LL_GPIO_Init(GPIOB, &gpio_initstruct);
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LL_GPIO_Init(GPIOC, &gpio_initstruct);
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LL_GPIO_Init(GPIOD, &gpio_initstruct);
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LL_GPIO_Init(GPIOE, &gpio_initstruct);
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LL_GPIO_Init(GPIOH, &gpio_initstruct);
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LL_AHB1_GRP1_DisableClock(LL_AHB1_GRP1_PERIPH_GPIOA |
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LL_AHB1_GRP1_PERIPH_GPIOB |
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LL_AHB1_GRP1_PERIPH_GPIOC |
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LL_AHB1_GRP1_PERIPH_GPIOD |
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LL_AHB1_GRP1_PERIPH_GPIOE |
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LL_AHB1_GRP1_PERIPH_GPIOH);
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/** Request to enter STOP_MAINREGU mode
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* Following procedure describe in STM32F4xx Reference Manual
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* See PWR part, section Low-power modes, STOP_MAINREGU mode
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*/
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/* Set STOP_MAINREGU mode when CPU enters deepsleep */
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LL_PWR_SetPowerMode(LL_PWR_MODE_STOP_MAINREGU);
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/* Set SLEEPDEEP bit of Cortex System Control Register */
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LL_LPM_EnableDeepSleep();
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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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* @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) = 100000000
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* HCLK(Hz) = 100000000
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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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* PLL_M = 8
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* PLL_N = 400
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* PLL_P = 4
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* VDD(V) = 3.3
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* Main regulator output voltage = Scale1 mode
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* Flash Latency(WS) = 3
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* @param None
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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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/* Enable HSE oscillator */
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LL_RCC_HSE_EnableBypass();
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LL_RCC_HSE_Enable();
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while(LL_RCC_HSE_IsReady() != 1)
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{
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};
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/* Set FLASH latency */
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LL_FLASH_SetLatency(LL_FLASH_LATENCY_3);
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/* Main PLL configuration and activation */
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LL_RCC_PLL_ConfigDomain_SYS(LL_RCC_PLLSOURCE_HSE, LL_RCC_PLLM_DIV_8, 400, LL_RCC_PLLP_DIV_4);
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LL_RCC_PLL_Enable();
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while(LL_RCC_PLL_IsReady() != 1)
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{
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};
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/* Sysclk activation on the main PLL */
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LL_RCC_SetAHBPrescaler(LL_RCC_SYSCLK_DIV_1);
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LL_RCC_SetSysClkSource(LL_RCC_SYS_CLKSOURCE_PLL);
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while(LL_RCC_GetSysClkSource() != LL_RCC_SYS_CLKSOURCE_STATUS_PLL)
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{
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};
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/* Set APB1 & APB2 prescaler */
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LL_RCC_SetAPB1Prescaler(LL_RCC_APB1_DIV_2);
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LL_RCC_SetAPB2Prescaler(LL_RCC_APB2_DIV_1);
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/* Set systick to 1ms */
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SysTick_Config(100000000 / 1000);
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/* Update CMSIS variable (which can be updated also through SystemCoreClockUpdate function) */
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SystemCoreClock = 100000000;
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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", 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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