FatFs_USBDisk_RTOS
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Outline
Includes
#include "main.h"
Private variables
USBDISKFatFs
MyFile
USBDISKPath
hUSBHost
MSC_ApplicationTypeDef
AppliEvent
Private function prototypes
Private functions
main()
StartThread(const void *)
MSC_Application()
USBH_UserProcess(USBH_HandleTypeDef *, uint8_t)
SystemClock_Config()
Error_Handler()
Files
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SourceVuSTM32 Libraries and SamplesFatFs_USBDisk_RTOSSrc/main.c
 
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/** ****************************************************************************** * @file FatFs/FatFs_USBDisk_RTOS/Src/main.c * @author MCD Application Team * @brief Main program body * This sample code shows how to use FatFs with USB disk drive in RTOS * mode. ****************************************************************************** * @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 USBDISKFatFs; /* File system object for USB disk logical drive */ FIL MyFile; /* File object */ char USBDISKPath[4]; /* USB Host logical drive path */ USBH_HandleTypeDef hUSBHost; /* USB Host handle */ typedef enum { DISCONNECTION_EVENT = 1, CONNECTION_EVENT, ...}MSC_ApplicationTypeDef; osMessageQId AppliEvent; Private variables /* Private function prototypes -----------------------------------------------*/ static void SystemClock_Config(void); static void Error_Handler(void); static void USBH_UserProcess(USBH_HandleTypeDef *phost, uint8_t id); static void MSC_Application(void); static void StartThread(void const *argument); Private function prototypes /* Private functions ---------------------------------------------------------*/ /** * @brief Main program * @param None * @retval None *//* ... */ int main(void) { /* STM32F4xx HAL library initialization: - Configure the Flash prefetch, Flash preread and Buffer caches - 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. - Low Level Initialization *//* ... */ HAL_Init(); /* Configure the system clock to 100 MHz */ SystemClock_Config(); /* Configure LED4 and LED3 */ BSP_LED_Init(LED4); BSP_LED_Init(LED3); /*##-1- Start task #########################################################*/ osThreadDef(USER_Thread, StartThread, osPriorityNormal, 0, 8 * configMINIMAL_STACK_SIZE); osThreadCreate(osThread(USER_Thread), NULL); /*##-2- Create Application Queue ###########################################*/ osMessageQDef(osqueue, 1, uint16_t); AppliEvent = osMessageCreate(osMessageQ(osqueue), NULL); /*##-3- Start scheduler ####################################################*/ osKernelStart(); /* We should never get here as control is now taken by the scheduler */ for( ;; ); }{ ... } /** * @brief Start task * @param pvParameters not used * @retval None *//* ... */ static void StartThread(void const *argument) { osEvent event; /* Link the USB Host disk I/O driver */ if(FATFS_LinkDriver(&USBH_Driver, USBDISKPath) == 0) { /* Init Host Library */ USBH_Init(&hUSBHost, USBH_UserProcess, 0); /* Add Supported Class */ USBH_RegisterClass(&hUSBHost, USBH_MSC_CLASS); /* Start Host Process */ USBH_Start(&hUSBHost); for( ;; ) { event = osMessageGet(AppliEvent, osWaitForever); if(event.status == osEventMessage) { switch(event.value.v) { case CONNECTION_EVENT: MSC_Application(); break; case CONNECTION_EVENT: case DISCONNECTION_EVENT: f_mount(NULL, (TCHAR const*)"", 0); break; case DISCONNECTION_EVENT: default: break;default }switch (event.value.v) { ... } }if (event.status == osEventMessage) { ... } }for (;;) { ... } }if (FATFS_LinkDriver(&USBH_Driver, USBDISKPath) == 0) { ... } }{ ... } /** * @brief Main routine for Mass Storage Class * @param None * @retval None *//* ... */ static void MSC_Application(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 */ /* Register the file system object to the FatFs module */ if(f_mount(&USBDISKFatFs, (TCHAR const*)USBDISKPath, 0) != FR_OK) { /* FatFs Initialization Error */ Error_Handler(); }if (f_mount(&USBDISKFatFs, (TCHAR const*)USBDISKPath, 0) != FR_OK) { ... } else { /* 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(); }if (f_open(&MyFile, "STM32.TXT", FA_CREATE_ALWAYS | FA_WRITE) != FR_OK) { ... } else { /* Write data to the text file */ res = f_write(&MyFile, wtext, sizeof(wtext), (void *)&byteswritten); if((byteswritten == 0) || (res != FR_OK)) { /* 'STM32.TXT' file Write or EOF Error */ Error_Handler(); }if ((byteswritten == 0) || (res != FR_OK)) { ... } else { /* Close the open text file */ f_close(&MyFile); /* 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(); }if (f_open(&MyFile, "STM32.TXT", FA_READ) != FR_OK) { ... } else { /* Read data from the text file */ res = f_read(&MyFile, rtext, sizeof(rtext), (void *)&bytesread); if((bytesread == 0) || (res != FR_OK)) { /* 'STM32.TXT' file Read or EOF Error */ Error_Handler(); }if ((bytesread == 0) || (res != FR_OK)) { ... } else { /* Close the open text file */ f_close(&MyFile); /* Compare read data with the expected data */ if((bytesread != byteswritten)) { /* Read data is different from the expected data */ Error_Handler(); }if ((bytesread != byteswritten)) { ... } else { /* Success of the demo: no error occurrence */ BSP_LED_On(LED3); }else { ... } }else { ... } }else { ... } }else { ... } }else { ... } }else { ... } /* Unlink the USB disk I/O driver */ FATFS_UnLinkDriver(USBDISKPath); }{ ... } /** * @brief User Process * @param phost: Host handle * @param id: Host Library user message ID * @retval None *//* ... */ static void USBH_UserProcess(USBH_HandleTypeDef *phost, uint8_t id) { switch(id) { case HOST_USER_SELECT_CONFIGURATION: break; case HOST_USER_SELECT_CONFIGURATION: case HOST_USER_DISCONNECTION: BSP_LED_Off(LED4); BSP_LED_Off(LED3); osMessagePut(AppliEvent, DISCONNECTION_EVENT, 0); break; case HOST_USER_DISCONNECTION: case HOST_USER_CLASS_ACTIVE: osMessagePut(AppliEvent, CONNECTION_EVENT, 0); break; case HOST_USER_CLASS_ACTIVE: default: break; default }switch (id) { ... } }{ ... } /** * @brief System Clock Configuration * The system Clock is configured as follow : * System Clock source = PLL (HSE) * SYSCLK(Hz) = 100000000 * HCLK(Hz) = 100000000 * AHB Prescaler = 1 * APB1 Prescaler = 2 * APB2 Prescaler = 1 * HSE Frequency(Hz) = 8000000 * PLL_M = 8 * PLL_N = 200 * PLL_P = 2 * PLL_Q = 7 * PLL_R = 2 * VDD(V) = 3.3 * Main regulator output voltage = Scale1 mode * Flash Latency(WS) = 3 * * The USB clock configuration from PLLI2S: * PLLI2SM = 8 * PLLI2SN = 192 * PLLI2SQ = 4 * @param None * @retval None *//* ... */ static void SystemClock_Config(void) { RCC_ClkInitTypeDef RCC_ClkInitStruct; RCC_OscInitTypeDef RCC_OscInitStruct; RCC_PeriphCLKInitTypeDef PeriphClkInitStruct; 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_BYPASS; RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE; RCC_OscInitStruct.PLL.PLLM = 8; RCC_OscInitStruct.PLL.PLLN = 200; RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2; RCC_OscInitStruct.PLL.PLLQ = 7; RCC_OscInitStruct.PLL.PLLR = 2; ret = HAL_RCC_OscConfig(&RCC_OscInitStruct); if(ret != HAL_OK) { while(1) { ; } }if (ret != HAL_OK) { ... } /* Select PLLSAI output as USB clock source */ PeriphClkInitStruct.PLLI2S.PLLI2SM = 8; PeriphClkInitStruct.PLLI2S.PLLI2SQ = 4; PeriphClkInitStruct.PLLI2S.PLLI2SN = 192; PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_CK48; PeriphClkInitStruct.Clk48ClockSelection = RCC_CK48CLKSOURCE_PLLI2SQ; HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct); /* 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_DIV2; RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; ret = HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_3); 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 LED4 on */ BSP_LED_On(LED4); 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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