LibJPEG_Encoding
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Outline
Includes
#include "main.h"
Private variables
SDFatFs
MyFile
MyFile1
SDPath
RGB_matrix
_aucLine
counter
bytesread
Xpos
Ypos
Private function prototypes
Private functions
main()
LCD_Config()
Jpeg_CallbackFunction(uint8_t *, uint32_t)
SystemClock_Config()
Error_Handler()
Files
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SourceVuSTM32 Libraries and SamplesLibJPEG_EncodingSrc/main.c
 
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/** ****************************************************************************** * @file LibJPEG/LibJPEG_Encoding/Src/main.c * @author MCD Application Team * @brief This file provides main program functions ****************************************************************************** * @attention * * Copyright (c) 2017 STMicroelectronics. * All rights reserved. * * This software is licensed under terms that can be found in the LICENSE file * in the root directory of this software component. * If no LICENSE file comes with this software, it is provided AS-IS. * ****************************************************************************** *//* ... */ /* Includes ------------------------------------------------------------------*/ #include "main.h" Includes /* Private typedef -----------------------------------------------------------*/ /* Private define ------------------------------------------------------------*/ /* Private macro -------------------------------------------------------------*/ /* Private variables ---------------------------------------------------------*/ FATFS SDFatFs; /* File system object for SD card logical drive */ FIL MyFile, MyFile1; /* File objects */ char SDPath[4]; /* SD card logical drive path */ RGB_typedef *RGB_matrix; uint8_t _aucLine[1024]; uint32_t counter = 0, bytesread; uint16_t Xpos = 0; uint16_t Ypos = 0; Private variables /* Private function prototypes -----------------------------------------------*/ static void SystemClock_Config(void); static uint8_t Jpeg_CallbackFunction(uint8_t* Row, uint32_t DataLength); static void LCD_Config(void); static void Error_Handler(void); Private function prototypes /* Private functions ---------------------------------------------------------*/ /** * @brief Main program * @param None * @retval None *//* ... */ int main(void) { /* STM32F4xx HAL library initialization: - Configure the Flash prefetch, instruction and Data caches - Configure the Systick to generate an interrupt each 1 msec - Set NVIC Group Priority to 4 - Global MSP (MCU Support Package) initialization *//* ... */ HAL_Init(); /* Configure the system clock to 180 MHz */ SystemClock_Config(); /* Initialize IO expander */ BSP_IO_Init(); /* Configure LED3 */ BSP_LED_Init(LED3); /*##-1- LCD Configuration ##################################################*/ LCD_Config(); /* ########################################################################### When the uSD Card is used; the Camera module must be unplugged, this is due to the shared pins between the two devices. Otherwise, you have to set camera sensor in Power Down mode, by calling the BSP_CAMERA_PwrDown() available under stm32446e_eval_camera.c BSP driver *//* ... */ /* Set camera sensor in Power Down mode */ BSP_CAMERA_PwrDown(); /*##-2- Link the micro SD disk I/O driver ##################################*/ if(FATFS_LinkDriver(&SD_Driver, SDPath) == 0) { /*##-3- Register the file system object to the FatFs module ##############*/ if(f_mount(&SDFatFs, (TCHAR const*)SDPath, 0) == FR_OK) { /*##-4- Create and Open a new jpg image file with write access #########*/ if(f_open(&MyFile1, "image.jpg", FA_CREATE_ALWAYS | FA_WRITE) == FR_OK) { /*##-5- Open the BMP image with read access ##########################*/ if(f_open(&MyFile, "image.bmp", FA_READ) == FR_OK) { /*##-6- Jpeg encoding ##############################################*/ jpeg_encode(&MyFile, &MyFile1, IMAGE_WIDTH, IMAGE_HEIGHT, IMAGE_QUALITY, _aucLine); /* Close the BMP and JPEG files */ f_close(&MyFile1); f_close(&MyFile); /*##-7- Jpeg decoding ##############################################*/ /* Open the BMP file for read */ if(f_open(&MyFile1, "image.jpg", FA_READ) == FR_OK) { /* Jpeg Decoding for display to LCD */ jpeg_decode(&MyFile1, IMAGE_WIDTH, _aucLine, Jpeg_CallbackFunction); /* Close the BMP file */ f_close(&MyFile1); }if (f_open(&MyFile1, "image.jpg", FA_READ) == FR_OK) { ... } else { Error_Handler(); }else { ... } }if (f_open(&MyFile, "image.bmp", FA_READ) == FR_OK) { ... } else { Error_Handler(); }else { ... } }if (f_open(&MyFile1, "image.jpg", FA_CREATE_ALWAYS | FA_WRITE) == FR_OK) { ... } else { Error_Handler(); }else { ... } }if (f_mount(&SDFatFs, (TCHAR const*)SDPath, 0) == FR_OK) { ... } else { Error_Handler(); }else { ... } }if (FATFS_LinkDriver(&SD_Driver, SDPath) == 0) { ... } /* Infinite loop */ while (1) { }while (1) { ... } }{ ... } /** * @brief LCD Configuration. * @retval None *//* ... */ static void LCD_Config(void) { uint8_t lcd_status = LCD_OK; /* LCD DSI initialization in mode Video Burst */ lcd_status = BSP_LCD_Init(); if(lcd_status != LCD_OK) { Error_Handler(); }if (lcd_status != LCD_OK) { ... } BSP_LCD_LayerDefaultInit(0, LCD_FB_START_ADDRESS); /* Clear the LCD Background layer */ BSP_LCD_Clear(LCD_COLOR_WHITE); BSP_LCD_SetFont(&LCD_DEFAULT_FONT); /* Clear the LCD */ BSP_LCD_SetBackColor(LCD_COLOR_WHITE); BSP_LCD_Clear(LCD_COLOR_WHITE); /* Set the LCD Text Color */ BSP_LCD_SetTextColor(LCD_COLOR_DARKBLUE); /* Display LCD messages */ BSP_LCD_DisplayStringAt(0, 430, (uint8_t *)"Application LibJPEG_Encoding", CENTER_MODE); /* Compute centered position to draw on screen the decoded pixels */ Xpos = (uint16_t)((BSP_LCD_GetXSize() - IMAGE_WIDTH) / 2); Ypos = (uint16_t)((BSP_LCD_GetYSize() - IMAGE_HEIGHT) / 2); }{ ... } /** * @brief Copy decompressed data to display buffer. * @param Row: Output row buffer * @param DataLength: Row width in output buffer * @retval None *//* ... */ static uint8_t Jpeg_CallbackFunction(uint8_t* Row, uint32_t DataLength) { uint32_t i = 0; RGB_matrix = (RGB_typedef*)Row; uint32_t ARGB8888Buffer[IMAGE_WIDTH]; #ifdef SWAP_RB for(i = 0; i < IMAGE_WIDTH; i++) { ARGB8888Buffer[i] = (uint32_t) ( 0xFF000000 | (((uint32_t)(RGB_matrix[i].B) & 0x000000FF) >> 0) | (((uint32_t)(RGB_matrix[i].G) & 0x000000FF) << 8) | (((uint32_t)(RGB_matrix[i].R) & 0x000000FF) << 16) ); BSP_LCD_DrawPixel((i + Xpos), (counter + Ypos), ARGB8888Buffer[i]); }for (i = 0; i < IMAGE_WIDTH; i++) { ... } /* ... */#else for(i = 0; i < IMAGE_WIDTH; i++) { ARGB8888Buffer[i] = (uint32_t) ( 0xFF000000 | (((uint32_t)(RGB_matrix[i].R) & 0x000000FF) >> 0) | (((uint32_t)(RGB_matrix[i].G) & 0x000000FF) << 8) | (((uint32_t)(RGB_matrix[i].B) & 0x000000FF) << 16) ); BSP_LCD_DrawPixel((i + Xpos), (counter + Ypos), ARGB8888Buffer[i]); }for (i = 0; i < IMAGE_WIDTH; i++) { ... } /* ... */#endif counter++; return 0; }{ ... } /** * @brief System Clock Configuration * The system Clock is configured as follow : * System Clock source = PLL (HSE) * SYSCLK(Hz) = 180000000 * HCLK(Hz) = 180000000 * AHB Prescaler = 1 * APB1 Prescaler = 4 * APB2 Prescaler = 2 * HSE Frequency(Hz) = 25000000 * PLL_M = 25 * PLL_N = 360 * PLL_P = 2 * PLL_Q = 7 * PLL_R = 6 * VDD(V) = 3.3 * Main regulator output voltage = Scale1 mode * Flash Latency(WS) = 5 * @param None * @retval None *//* ... */ static void SystemClock_Config(void) { RCC_ClkInitTypeDef RCC_ClkInitStruct; RCC_OscInitTypeDef RCC_OscInitStruct; HAL_StatusTypeDef ret = HAL_OK; /* Enable Power Control clock */ __HAL_RCC_PWR_CLK_ENABLE(); /* The voltage scaling allows optimizing the power consumption when the device is clocked below the maximum system frequency, to update the voltage scaling value regarding system frequency refer to product datasheet. *//* ... */ __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1); /* Enable HSE Oscillator and activate PLL with HSE as source */ RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE; RCC_OscInitStruct.HSEState = RCC_HSE_ON; RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE; RCC_OscInitStruct.PLL.PLLM = 25; RCC_OscInitStruct.PLL.PLLN = 360; RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2; RCC_OscInitStruct.PLL.PLLQ = 7; RCC_OscInitStruct.PLL.PLLR = 6; ret = HAL_RCC_OscConfig(&RCC_OscInitStruct); if(ret != HAL_OK) { while(1) { ; } }if (ret != HAL_OK) { ... } /* Activate the OverDrive to reach the 180 MHz Frequency */ ret = HAL_PWREx_EnableOverDrive(); if(ret != HAL_OK) { while(1) { ; } }if (ret != HAL_OK) { ... } /* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */ RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2); RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4; RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2; ret = HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5); if(ret != HAL_OK) { while(1) { ; } }if (ret != HAL_OK) { ... } }{ ... } /** * @brief This function is executed in case of error occurrence. * @param None * @retval None *//* ... */ static void Error_Handler(void) { /* Turn LED3 on */ BSP_LED_On(LED3); while(1) { }while (1) { ... } }{ ... } #ifdef USE_FULL_ASSERT /** * @brief Reports the name of the source file and the source line number * where the assert_param error has occurred. * @param file: pointer to the source file name * @param line: assert_param error line source number * @retval None *//* ... */ void assert_failed(uint8_t* file, uint32_t line) { /* User can add his own implementation to report the file name and line number, ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) *//* ... */ /* Infinite loop */ while (1) { }while (1) { ... } }assert_failed (uint8_t* file, uint32_t line) { ... } /* ... */#endifPrivate functions
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