/** ****************************************************************************** * @file FatFs/FatFs_uSD/Src/main.c * @author MCD Application Team * @brief Main program body * This sample code shows how to use FatFs with uSD card drive. ****************************************************************************** * @attention * *

© Copyright (c) 2016 STMicroelectronics. * All rights reserved.

* * This software component is licensed by ST under BSD 3-Clause license, * the "License"; You may not use this file except in compliance with the * License. You may obtain a copy of the License at: * opensource.org/licenses/BSD-3-Clause * ****************************************************************************** */ /* Includes ------------------------------------------------------------------*/ #include "main.h" /* Private typedef -----------------------------------------------------------*/ /* Private define ------------------------------------------------------------*/ /* Private macro -------------------------------------------------------------*/ /* Private variables ---------------------------------------------------------*/ FATFS SDFatFs; /* File system object for SD card logical drive */ FIL MyFile; /* File object */ char SDPath[4]; /* SD card logical drive path */ /* Private function prototypes -----------------------------------------------*/ void SystemClock_Config(void); static void Error_Handler(void); /* Private functions ---------------------------------------------------------*/ /** * @brief Main program * @param None * @retval None */ int main(void) { FRESULT res; /* FatFs function common result code */ uint32_t byteswritten, bytesread; /* File write/read counts */ uint8_t wtext[] = "This is STM32 working with FatFs"; /* File write buffer */ uint8_t rtext[100]; /* File read buffer */ /* STM32F107xC HAL library initialization: - Configure the Flash prefetch - Systick timer is configured by default as source of time base, but user can eventually implement his proper time base source (a general purpose timer for example or other time source), keeping in mind that Time base duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and handled in milliseconds basis. - Set NVIC Group Priority to 4 - Low Level Initialization */ HAL_Init(); /* Configure the system clock to 72 MHz */ SystemClock_Config(); /* Configure LED_GREEN and LED_RED */ BSP_LED_Init(LED_GREEN); BSP_LED_Init(LED_RED); /*##-1- Link the micro SD disk I/O driver ##################################*/ if(FATFS_LinkDriver(&SD_Driver, SDPath) == 0) { /*##-2- Register the file system object to the FatFs module ##############*/ if(f_mount(&SDFatFs, (TCHAR const*)SDPath, 0) != FR_OK) { /* FatFs Initialization Error */ Error_Handler(); } else { /*##-3- Create a FAT file system (format) on the logical drive #########*/ /* WARNING: Formatting the uSD card will delete all content on the device */ if(f_mkfs((TCHAR const*)SDPath, 0, 0) != FR_OK) { /* FatFs Format Error */ Error_Handler(); } else { /*##-4- Create and Open a new text file object with write access #####*/ if(f_open(&MyFile, "STM32.TXT", FA_CREATE_ALWAYS | FA_WRITE) != FR_OK) { /* 'STM32.TXT' file Open for write Error */ Error_Handler(); } else { /*##-5- Write data to the text file ################################*/ res = f_write(&MyFile, wtext, sizeof(wtext), (void *)&byteswritten); /*##-6- Close the open text file #################################*/ if (f_close(&MyFile) != FR_OK ) { Error_Handler(); } if((byteswritten == 0) || (res != FR_OK)) { /* 'STM32.TXT' file Write or EOF Error */ Error_Handler(); } else { /*##-7- Open the text file object with read access ###############*/ if(f_open(&MyFile, "STM32.TXT", FA_READ) != FR_OK) { /* 'STM32.TXT' file Open for read Error */ Error_Handler(); } else { /*##-8- Read data from the text file ###########################*/ res = f_read(&MyFile, rtext, sizeof(rtext), (UINT*)&bytesread); if((bytesread == 0) || (res != FR_OK)) { /* 'STM32.TXT' file Read or EOF Error */ Error_Handler(); } else { /*##-9- Close the open text file #############################*/ f_close(&MyFile); /*##-10- Compare read data with the expected data ############*/ if((bytesread != byteswritten)) { /* Read data is different from the expected data */ Error_Handler(); } else { /* Success of the demo: no error occurrence */ BSP_LED_On(LED_GREEN); } } } } } } } } /*##-11- Unlink the RAM disk I/O driver ####################################*/ FATFS_UnLinkDriver(SDPath); /* Infinite loop */ while (1) { } } /** * @brief System Clock Configuration * The system Clock is configured as follow : * System Clock source = PLL (HSE) * SYSCLK(Hz) = 72000000 * HCLK(Hz) = 72000000 * AHB Prescaler = 1 * APB1 Prescaler = 2 * APB2 Prescaler = 1 * HSE Frequency(Hz) = 25000000 * HSE PREDIV1 = 5 * HSE PREDIV2 = 5 * PLL2MUL = 8 * Flash Latency(WS) = 2 * @param None * @retval None */ void SystemClock_Config(void) { RCC_ClkInitTypeDef clkinitstruct = {0}; RCC_OscInitTypeDef oscinitstruct = {0}; /* Configure PLLs ------------------------------------------------------*/ /* PLL2 configuration: PLL2CLK = (HSE / HSEPrediv2Value) * PLL2MUL = (25 / 5) * 8 = 40 MHz */ /* PREDIV1 configuration: PREDIV1CLK = PLL2CLK / HSEPredivValue = 40 / 5 = 8 MHz */ /* PLL configuration: PLLCLK = PREDIV1CLK * PLLMUL = 8 * 9 = 72 MHz */ /* Enable HSE Oscillator and activate PLL with HSE as source */ oscinitstruct.OscillatorType = RCC_OSCILLATORTYPE_HSE; oscinitstruct.HSEState = RCC_HSE_ON; oscinitstruct.HSEPredivValue = RCC_HSE_PREDIV_DIV5; oscinitstruct.Prediv1Source = RCC_PREDIV1_SOURCE_PLL2; oscinitstruct.PLL.PLLState = RCC_PLL_ON; oscinitstruct.PLL.PLLSource = RCC_PLLSOURCE_HSE; oscinitstruct.PLL.PLLMUL = RCC_PLL_MUL9; oscinitstruct.PLL2.PLL2State = RCC_PLL2_ON; oscinitstruct.PLL2.PLL2MUL = RCC_PLL2_MUL8; oscinitstruct.PLL2.HSEPrediv2Value = RCC_HSE_PREDIV2_DIV5; if (HAL_RCC_OscConfig(&oscinitstruct)!= HAL_OK) { /* Initialization Error */ while(1); } /* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */ clkinitstruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2); clkinitstruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; clkinitstruct.AHBCLKDivider = RCC_SYSCLK_DIV1; clkinitstruct.APB2CLKDivider = RCC_HCLK_DIV1; clkinitstruct.APB1CLKDivider = RCC_HCLK_DIV2; if (HAL_RCC_ClockConfig(&clkinitstruct, FLASH_LATENCY_2)!= HAL_OK) { /* Initialization Error */ while(1); } } /** * @brief This function is executed in case of error occurrence. * @param None * @retval None */ static void Error_Handler(void) { while(1) { /* Toggle LED_RED fast */ BSP_LED_Toggle(LED_RED); HAL_Delay(40); } } #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) {} } #endif /** * @} */ /** * @} */ /** * @} */ /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/