446 lines
12 KiB
C
446 lines
12 KiB
C
/* USER CODE BEGIN Header */
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/**
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* @file UART/UART_TwoBoards_ComIT/Src/main.c
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* @author MCD Application Team
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* @brief This sample code shows how to use UART HAL API to transmit
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* and receive a data buffer with a communication process based on
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* IT transfer.
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* The communication is done using 2 Boards.
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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 TRANSMITTER_BOARD
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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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UART_HandleTypeDef huart1;
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/* USER CODE BEGIN PV */
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__IO ITStatus UartReady = RESET;
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__IO uint32_t UserButtonStatus = 0; /* set to 1 after User Button interrupt */
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/* Buffer used for transmission */
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uint8_t aTxBuffer[] = " ****UART_TwoBoards_ComIT**** ****UART_TwoBoards_ComIT**** ****UART_TwoBoards_ComIT**** ";
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/* Buffer used for reception */
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uint8_t aRxBuffer[RXBUFFERSIZE];
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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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static void MX_USART1_UART_Init(void);
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/* USER CODE BEGIN PFP */
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static uint16_t Buffercmp(uint8_t *pBuffer1, uint8_t *pBuffer2, uint16_t BufferLength);
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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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/* STM32WLxx 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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/* 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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MX_GPIO_Init();
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MX_USART1_UART_Init();
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/* USER CODE BEGIN 2 */
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/* Configure LED1 and LED3 */
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BSP_LED_Init(LED1);
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BSP_LED_Init(LED3);
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#ifdef TRANSMITTER_BOARD
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/* Configure User push-button (B1) in Interrupt mode */
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BSP_PB_Init(BUTTON_SW1, BUTTON_MODE_EXTI);
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/* Wait for User push-button (B1) press before starting the Communication.
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In the meantime, LED1 is blinking */
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while (UserButtonStatus == 0)
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{
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/* Toggle LED1*/
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BSP_LED_Toggle(LED1);
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HAL_Delay(100);
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}
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BSP_LED_Off(LED1);
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/* The board sends the message and expects to receive it back */
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/*##-1- Start the transmission process #####################################*/
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/* While the UART in reception process, user can transmit data through
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"aTxBuffer" buffer */
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if (HAL_UART_Transmit_IT(&huart1, (uint8_t *)aTxBuffer, TXBUFFERSIZE) != HAL_OK)
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{
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Error_Handler();
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}
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/*##-2- Wait for the end of the transfer ###################################*/
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while (UartReady != SET)
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{
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}
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/* Reset transmission flag */
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UartReady = RESET;
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/*##-3- Put UART peripheral in reception process ###########################*/
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if (HAL_UART_Receive_IT(&huart1, (uint8_t *)aRxBuffer, RXBUFFERSIZE) != HAL_OK)
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{
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Error_Handler();
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}
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#else
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/* The board receives the message and sends it back */
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/*##-1- Put UART peripheral in reception process ###########################*/
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if (HAL_UART_Receive_IT(&huart1, (uint8_t *)aRxBuffer, RXBUFFERSIZE) != HAL_OK)
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{
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Error_Handler();
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}
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/*##-2- Wait for the end of the transfer ###################################*/
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/* While waiting for message to come from the other board, LED1 is
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blinking according to the following pattern: a double flash every half-second */
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while (UartReady != SET)
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{
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BSP_LED_On(LED1);
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HAL_Delay(100);
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BSP_LED_Off(LED1);
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HAL_Delay(100);
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BSP_LED_On(LED1);
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HAL_Delay(100);
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BSP_LED_Off(LED1);
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HAL_Delay(500);
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}
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/* Reset transmission flag */
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UartReady = RESET;
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BSP_LED_Off(LED1);
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/*##-3- Start the transmission process #####################################*/
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/* While the UART in reception process, user can transmit data through
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"aTxBuffer" buffer */
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if (HAL_UART_Transmit_IT(&huart1, (uint8_t *)aTxBuffer, TXBUFFERSIZE) != HAL_OK)
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{
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Error_Handler();
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}
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#endif /* TRANSMITTER_BOARD */
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/*##-4- Wait for the end of the transfer ###################################*/
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while (UartReady != SET)
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{
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}
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/* Reset transmission flag */
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UartReady = RESET;
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/*##-5- Compare the sent and received buffers ##############################*/
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if (Buffercmp((uint8_t *)aTxBuffer, (uint8_t *)aRxBuffer, RXBUFFERSIZE))
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{
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Error_Handler();
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}
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/* Turn on LED1 if test passes then enter infinite loop */
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BSP_LED_On(LED1);
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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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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 buses 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_8;
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RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
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RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_MSI;
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RCC_OscInitStruct.PLL.PLLM = RCC_PLLM_DIV4;
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RCC_OscInitStruct.PLL.PLLN = 24;
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RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
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RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2;
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RCC_OscInitStruct.PLL.PLLQ = RCC_PLLQ_DIV2;
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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_PLLCLK;
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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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/**
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* @brief USART1 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_USART1_UART_Init(void)
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{
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/* USER CODE BEGIN USART1_Init 0 */
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/* USER CODE END USART1_Init 0 */
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/* USER CODE BEGIN USART1_Init 1 */
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/* USER CODE END USART1_Init 1 */
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huart1.Instance = USART1;
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huart1.Init.BaudRate = 9600;
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huart1.Init.WordLength = UART_WORDLENGTH_8B;
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huart1.Init.StopBits = UART_STOPBITS_1;
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huart1.Init.Parity = UART_PARITY_NONE;
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huart1.Init.Mode = UART_MODE_TX_RX;
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huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
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huart1.Init.OverSampling = UART_OVERSAMPLING_16;
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huart1.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
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huart1.Init.ClockPrescaler = UART_PRESCALER_DIV1;
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huart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
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if (HAL_UART_Init(&huart1) != HAL_OK)
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{
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Error_Handler();
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}
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if (HAL_UARTEx_SetTxFifoThreshold(&huart1, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)
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{
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Error_Handler();
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}
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if (HAL_UARTEx_SetRxFifoThreshold(&huart1, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK)
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{
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Error_Handler();
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}
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if (HAL_UARTEx_DisableFifoMode(&huart1) != HAL_OK)
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{
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Error_Handler();
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}
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/* USER CODE BEGIN USART1_Init 2 */
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/* USER CODE END USART1_Init 2 */
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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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/* GPIO Ports Clock Enable */
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__HAL_RCC_GPIOB_CLK_ENABLE();
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}
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/* USER CODE BEGIN 4 */
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/**
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* @brief Tx Transfer completed callback
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* @param UartHandle: UART handle.
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* @note This example shows a simple way to report end of IT Tx transfer, and
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* you can add your own implementation.
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* @retval None
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*/
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void HAL_UART_TxCpltCallback(UART_HandleTypeDef *UartHandle)
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{
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/* Set transmission flag: transfer complete */
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UartReady = SET;
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}
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/**
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* @brief Rx Transfer completed callback
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* @param UartHandle: UART handle
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* @note This example shows a simple way to report end of DMA Rx transfer, and
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* you can add your own implementation.
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* @retval None
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*/
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void HAL_UART_RxCpltCallback(UART_HandleTypeDef *UartHandle)
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{
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/* Set transmission flag: transfer complete */
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UartReady = SET;
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}
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/**
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* @brief UART error callbacks
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* @param UartHandle: UART handle
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* @note This example shows a simple way to report transfer error, and you can
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* add your own implementation.
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* @retval None
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*/
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void HAL_UART_ErrorCallback(UART_HandleTypeDef *UartHandle)
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{
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Error_Handler();
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}
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/**
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* @brief EXTI line detection callbacks
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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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UserButtonStatus = 1;
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}
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}
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/**
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* @brief Compares two buffers.
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* @param pBuffer1, pBuffer2: buffers to be compared.
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* @param BufferLength: buffer's length
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* @retval 0 : pBuffer1 identical to pBuffer2
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* >0 : pBuffer1 differs from pBuffer2
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*/
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static uint16_t Buffercmp(uint8_t *pBuffer1, uint8_t *pBuffer2, uint16_t BufferLength)
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{
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while (BufferLength--)
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{
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if ((*pBuffer1) != *pBuffer2)
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{
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return BufferLength;
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}
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pBuffer1++;
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pBuffer2++;
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}
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return 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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/* Turn LED3 on */
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BSP_LED_On(LED3);
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while (1);
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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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/* 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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