261 lines
8.1 KiB
C
261 lines
8.1 KiB
C
/**
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******************************************************************************
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* @file FatFs/FatFs_uSD/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 use FatFs with uSD card drive.
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2016 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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/* 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; /* File object */
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char SDPath[4]; /* SD card logical drive path */
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/* Private function prototypes -----------------------------------------------*/
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void SystemClock_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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FRESULT res; /* FatFs function common result code */
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uint32_t byteswritten, bytesread; /* File write/read counts */
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uint8_t wtext[] = "This is STM32 working with FatFs"; /* File write buffer */
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uint8_t rtext[100]; /* File read buffer */
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/* STM32F103xG 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 LED_GREEN and LED_RED */
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BSP_LED_Init(LED_GREEN);
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BSP_LED_Init(LED_RED);
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/* Configure the system clock to 72 MHz */
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SystemClock_Config();
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/*##-1- 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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/*##-2- 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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/* FatFs Initialization Error */
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Error_Handler();
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}
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else
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{
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/*##-3- Create a FAT file system (format) on the logical drive #########*/
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/* WARNING: Formatting the uSD card will delete all content on the device */
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if(f_mkfs((TCHAR const*)SDPath, 0, 0) != FR_OK)
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{
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/* FatFs Format Error */
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Error_Handler();
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}
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else
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{
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/*##-4- Create and Open a new text file object with write access #####*/
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if(f_open(&MyFile, "STM32.TXT", FA_CREATE_ALWAYS | FA_WRITE) != FR_OK)
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{
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/* 'STM32.TXT' file Open for write Error */
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Error_Handler();
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}
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else
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{
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/*##-5- Write data to the text file ################################*/
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res = f_write(&MyFile, wtext, sizeof(wtext), (void *)&byteswritten);
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/*##-6- Close the open text file #################################*/
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if (f_close(&MyFile) != FR_OK )
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{
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Error_Handler();
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}
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if((byteswritten == 0) || (res != FR_OK))
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{
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/* 'STM32.TXT' file Write or EOF Error */
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Error_Handler();
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}
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else
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{
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/*##-7- Open the text file object with read access ###############*/
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if(f_open(&MyFile, "STM32.TXT", FA_READ) != FR_OK)
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{
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/* 'STM32.TXT' file Open for read Error */
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Error_Handler();
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}
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else
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{
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/*##-8- Read data from the text file ###########################*/
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res = f_read(&MyFile, rtext, sizeof(rtext), (UINT*)&bytesread);
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if((bytesread == 0) || (res != FR_OK))
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{
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/* 'STM32.TXT' file Read or EOF Error */
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Error_Handler();
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}
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else
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{
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/*##-9- Close the open text file #############################*/
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f_close(&MyFile);
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/*##-10- Compare read data with the expected data ############*/
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if((bytesread != byteswritten))
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{
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/* Read data is different from the expected data */
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Error_Handler();
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}
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else
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{
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/* Success of the demo: no error occurrence */
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BSP_LED_On(LED_GREEN);
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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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}
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}
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/*##-11- Unlink the RAM disk I/O driver ####################################*/
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FATFS_UnLinkDriver(SDPath);
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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 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) = 72000000
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* HCLK(Hz) = 72000000
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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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* HSE PREDIV1 = 1
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* PLLMUL = 9
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* Flash Latency(WS) = 2
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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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RCC_ClkInitTypeDef clkinitstruct = {0};
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RCC_OscInitTypeDef oscinitstruct = {0};
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/* Enable HSE Oscillator and activate PLL with HSE as source */
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oscinitstruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
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oscinitstruct.HSEState = RCC_HSE_ON;
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oscinitstruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
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oscinitstruct.PLL.PLLState = RCC_PLL_ON;
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oscinitstruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
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oscinitstruct.PLL.PLLMUL = RCC_PLL_MUL9;
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if (HAL_RCC_OscConfig(&oscinitstruct)!= HAL_OK)
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{
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/* Initialization Error */
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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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clkinitstruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
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clkinitstruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
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clkinitstruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
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clkinitstruct.APB2CLKDivider = RCC_HCLK_DIV1;
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clkinitstruct.APB1CLKDivider = RCC_HCLK_DIV2;
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if (HAL_RCC_ClockConfig(&clkinitstruct, FLASH_LATENCY_2)!= HAL_OK)
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{
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/* Initialization Error */
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while(1);
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}
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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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while(1)
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{
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/* Toggle LED_RED fast */
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BSP_LED_Toggle(LED_RED);
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HAL_Delay(40);
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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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#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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/**
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* @}
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*/
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