mirror of
https://github.com/STMicroelectronics/STM32CubeF4.git
synced 2025-05-05 19:29:25 +08:00
268 lines
8.4 KiB
C
268 lines
8.4 KiB
C
/**
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******************************************************************************
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* @file LibJPEG/LibJPEG_Encoding/Src/main.c
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* @author MCD Application Team
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* @brief Main program body
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* This sample code shows how to compress BMP file to JPEG file.
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******************************************************************************
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* @attention
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*
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* <h2><center>© Copyright (c) 2017 STMicroelectronics.
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* All rights reserved.</center></h2>
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*
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* This software component is licensed by ST under Ultimate Liberty license
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* SLA0044, the "License"; You may not use this file except in compliance with
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* the License. You may obtain a copy of the License at:
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* www.st.com/SLA0044
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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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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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/* Private macro -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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FATFS SDFatFs; /* File system object for SD card logical drive */
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FIL MyFile, MyFile1; /* File objects */
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char SDPath[4]; /* SD card logical drive path */
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RGB_typedef *RGB_matrix;
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uint8_t Image_BMP[1024];
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uint32_t counter, bytesread;
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/* Private function prototypes -----------------------------------------------*/
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static void SystemClock_Config(void);
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static uint8_t Jpeg_CallbackFunction(uint8_t* Row, uint32_t DataLength);
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static void LCD_Config(void);
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static void Error_Handler(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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/* STM32F4xx 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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HAL_Init();
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/* Configure the system clock to 100 MHz */
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SystemClock_Config();
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/* Configure LED3 */
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BSP_LED_Init(LED3);
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/*##-1- LCD Configuration ##################################################*/
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LCD_Config();
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/*##-2- Link the micro SD disk I/O driver ##################################*/
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if(FATFS_LinkDriver(&SD_Driver, SDPath) == 0)
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{
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/*##-3- Register the file system object to the FatFs module ##############*/
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if(f_mount(&SDFatFs, (TCHAR const*)SDPath, 0) == FR_OK)
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{
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/*##-4- Create and Open a new jpg image file with write access #########*/
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if(f_open(&MyFile1, "image.jpg", FA_CREATE_ALWAYS | FA_WRITE) == FR_OK)
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{
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/*##-5- Open the BMP image with read access ##########################*/
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if(f_open(&MyFile, "image.bmp", FA_READ) == FR_OK)
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{
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/*##-6- Jpeg encoding ##############################################*/
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jpeg_encode(&MyFile, &MyFile1, IMAGE_WIDTH, IMAGE_HEIGHT, IMAGE_QUALITY, Image_BMP);
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/* Close the BMP and JPEG files */
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f_close(&MyFile1);
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f_close(&MyFile);
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/*##-7- Jpeg decoding ##############################################*/
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/* Open the BMP file for read */
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if(f_open(&MyFile1, "image.jpg", FA_READ) == FR_OK)
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{
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/* Jpeg Decoding for display to LCD */
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jpeg_decode(&MyFile1, IMAGE_WIDTH, Image_BMP, Jpeg_CallbackFunction);
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/* Close the BMP file */
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f_close(&MyFile1);
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}
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else
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{
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Error_Handler();
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}
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}
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else
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{
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Error_Handler();
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}
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}
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else
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{
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Error_Handler();
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}
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}
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else
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{
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Error_Handler();
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}
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}
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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 LCD Configuration.
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* @Param None
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* @retval None
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*/
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static void LCD_Config(void)
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{
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/* LCD Initialization */
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BSP_LCD_Init();
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/* Clear the LCD */
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BSP_LCD_Clear(LCD_COLOR_WHITE);
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}
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/**
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* @brief Copy decompressed data to display buffer.
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* @param Row: Output row buffer
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* @param DataLength: Row width in output buffer
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* @retval None
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*/
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static uint8_t Jpeg_CallbackFunction(uint8_t* Row, uint32_t DataLength)
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{
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uint32_t i = 0;
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RGB_matrix = (RGB_typedef*)Row;
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uint16_t RGB16Buffer[IMAGE_WIDTH];
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for(i = 0; i < IMAGE_WIDTH; i++)
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{
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RGB16Buffer[i] = (uint16_t)
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(((RGB_matrix[i].B & 0x00F8) >> 3)|
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((RGB_matrix[i].G & 0x00FC) << 3)|
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((RGB_matrix[i].R & 0x00F8) << 8));
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BSP_LCD_DrawPixel(i, counter, RGB16Buffer[i]);
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}
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counter++;
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return 0;
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}
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/**
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* @brief This function is executed in case of error occurrence.
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* @param None
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* @retval None
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*/
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static void Error_Handler(void)
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{
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/* Turn LED3 on */
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BSP_LED_On(LED3);
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/* Stop the program with an 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 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 = 200
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* PLL_P = 2
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* PLL_Q = 7
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* PLL_R = 2
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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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static void SystemClock_Config(void)
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{
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RCC_ClkInitTypeDef RCC_ClkInitStruct;
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RCC_OscInitTypeDef RCC_OscInitStruct;
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HAL_StatusTypeDef ret = HAL_OK;
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/* Enable Power Control clock */
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__HAL_RCC_PWR_CLK_ENABLE();
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/* The voltage scaling allows optimizing the power consumption when the device is
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clocked below the maximum system frequency, to update the voltage scaling value
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regarding system frequency refer to product datasheet. */
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__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
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/* Enable HSE Oscillator and activate PLL with HSE as source */
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RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
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RCC_OscInitStruct.HSEState = RCC_HSE_ON;
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RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
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RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
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RCC_OscInitStruct.PLL.PLLM = 8;
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RCC_OscInitStruct.PLL.PLLN = 200;
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RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
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RCC_OscInitStruct.PLL.PLLQ = 7;
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RCC_OscInitStruct.PLL.PLLR = 2;
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ret = HAL_RCC_OscConfig(&RCC_OscInitStruct);
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if(ret != HAL_OK)
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{
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while(1) { ; }
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}
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/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2
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clocks dividers */
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RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | 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_DIV2;
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RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
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ret = HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_3);
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if(ret != HAL_OK)
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{
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while(1) { ; }
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}
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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\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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}
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#endif
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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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