254 lines
7.1 KiB
C
254 lines
7.1 KiB
C
/* USER CODE BEGIN Header */
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/**
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******************************************************************************
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* @file Examples_LL/UTILS/UTILS_ConfigureSystemClock/Src/main.c
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* @author MCD Application Team
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* @brief This example describes how to configure system clock using PLL with
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* HSI as source clock through the STM32WLxx UTILS 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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/* 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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/* Variable to store PLL parameters */
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/* Configuration will allow to reach a SYSCLK frequency set to 24MHz:
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Syst freq = ((HSI_VALUE / PLLM) * PLLN)/ PLLR)
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((16MHz / 1 ) * 6 / 4 ) = 24MHz */
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LL_UTILS_PLLInitTypeDef sUTILS_PLLInitStruct = {LL_RCC_PLLM_DIV_1, 6, LL_RCC_PLLR_DIV_4};
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/* Variable to store AHB and APB buses clock configuration */
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/* Settings to have HCLK1 set to 48MHz, APB1 to 12MHz and APB2 to 24MHz */
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LL_UTILS_ClkInitTypeDef sUTILS_ClkInitStruct = {LL_RCC_SYSCLK_DIV_1, LL_RCC_APB1_DIV_4, LL_RCC_APB2_DIV_2};
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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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void LED_Init(void);
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void MCO_ConfigGPIO(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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/* System started with default clock used after reset */
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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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/* Switch to PLL with HSI as clock source */
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LL_PLL_ConfigSystemClock_HSI(&sUTILS_PLLInitStruct, &sUTILS_ClkInitStruct);
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/*
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CMSIS variable automatically updated according to new configuration.
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SystemCoreClock should be equal to calculated HCLK frequency.
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FLASH latency is also tuned according to system constraints described
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in the reference manual.
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*/
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/* Set Systick to 1ms in using frequency set to SystemCoreClock */
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LL_Init1msTick(SystemCoreClock);
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/* Initialize LED2 */
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LED_Init();
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/* Configure SYSCLK for MCO */
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MCO_ConfigGPIO();
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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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LL_GPIO_TogglePin(LED2_GPIO_PORT, LED2_PIN);
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LL_mDelay(1000);
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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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/* USER CODE BEGIN 4 */
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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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/* Select MCO clock source and prescaler */
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LL_RCC_ConfigMCO(LL_RCC_MCO1SOURCE_SYSCLK, LL_RCC_MCO1_DIV_1);
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}
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/**
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* @brief Configure MCO pin (PA8).
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* @param None
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* @retval None
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*/
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void MCO_ConfigGPIO(void)
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{
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/* MCO Clock Enable */
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LL_AHB2_GRP1_EnableClock(LL_AHB2_GRP1_PERIPH_GPIOA);
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/* Configure the MCO pin in alternate function mode */
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LL_GPIO_SetPinMode(GPIOA, LL_GPIO_PIN_8, LL_GPIO_MODE_ALTERNATE);
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LL_GPIO_SetPinOutputType(GPIOA, LL_GPIO_PIN_8, LL_GPIO_OUTPUT_PUSHPULL);
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LL_GPIO_SetPinSpeed(GPIOA, LL_GPIO_PIN_8, LL_GPIO_SPEED_FREQ_VERY_HIGH);
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LL_GPIO_SetPinPull(GPIOA, LL_GPIO_PIN_8, LL_GPIO_PULL_NO);
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LL_GPIO_SetAFPin_8_15(GPIOA, LL_GPIO_PIN_8, LL_GPIO_AF_0);
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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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