STM32CubeF7

/**
  @page DynamicSwitch_Standalone USB Host Dynamic Switch application
  
  @verbatim
  ******************** (C) COPYRIGHT 2016 STMicroelectronics *******************
  * @file    USB_Host/DynamicSwitch_Standalone/readme.txt 
  * @author  MCD Application Team
  * @brief   Description of the USB Host Dynamic Switch application.
  ******************************************************************************
  *
  * Copyright (c) 2016 STMicroelectronics International N.V. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without 
  * modification, are permitted, provided that the following conditions are met:
  *
  * 1. Redistribution of source code must retain the above copyright notice, 
  *    this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright notice,
  *    this list of conditions and the following disclaimer in the documentation
  *    and/or other materials provided with the distribution.
  * 3. Neither the name of STMicroelectronics nor the names of other 
  *    contributors to this software may be used to endorse or promote products 
  *    derived from this software without specific written permission.
  * 4. This software, including modifications and/or derivative works of this 
  *    software, must execute solely and exclusively on microcontroller or
  *    microprocessor devices manufactured by or for STMicroelectronics.
  * 5. Redistribution and use of this software other than as permitted under 
  *    this license is void and will automatically terminate your rights under 
  *    this license. 
  *
  * THIS SOFTWARE IS PROVIDED BY STMICROELECTRONICS AND CONTRIBUTORS "AS IS" 
  * AND ANY EXPRESS, IMPLIED OR STATUTORY WARRANTIES, INCLUDING, BUT NOT 
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A 
  * PARTICULAR PURPOSE AND NON-INFRINGEMENT OF THIRD PARTY INTELLECTUAL PROPERTY
  * RIGHTS ARE DISCLAIMED TO THE FULLEST EXTENT PERMITTED BY LAW. IN NO EVENT 
  * SHALL STMICROELECTRONICS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, 
  * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 
  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 
  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
  * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  ******************************************************************************
   @endverbatim

@par Application Description 

This application is a part of the USB Host Library package using STM32Cube firmware. It describes how to use
dynamically switch, on the same port, between available USB host applications on the STM32F723xx devices.

The USBH_RegisterClass() API is provided by the USB Host Library to load the class driver. In this 
application MSC and HID classes are loaded and the user can start his application depending on the
connected device. 

At the beginning of the main program the HAL_Init() function is called to reset all the peripherals,
initialize the Flash interface and the systick. The user is provided with the SystemClock_Config()
function to configure the system clock (SYSCLK) to run at 216 Mhz. The Full Speed (FS) USB module uses
internally a 48-MHz clock which is coming from the main PLL.

When the application is started, the connected USB device is detected in the appropriate mode 
(MSC/HID) and gets initialized. The STM32 MCU behaves as a (MSC/HID) Host, it enumerates the
device and extracts VID, PID, manufacturer name, Serial number and product name information and displays it 
on the LCD screen.

At the beginning of each application (MSC/HID), a menu is displayed and the user can select any 
operation from the menu using the Touch Screen.

@note Care must be taken when using HAL_Delay(), this function provides accurate delay (in milliseconds)
      based on variable incremented in SysTick ISR. This implies that if HAL_Delay() is called from
      a peripheral ISR process, then the SysTick interrupt must have higher priority (numerically lower)
      than the peripheral interrupt. Otherwise the caller ISR process will be blocked.
      To change the SysTick interrupt priority you have to use HAL_NVIC_SetPriority() function.
      
@note The application needs to ensure that the SysTick time base is always set to 1 millisecond
      to have correct HAL operation.
      
For more details about the STM32Cube USB Host library, please refer to UM1720  
"STM32Cube USB Host library".


@par USB Library Configuration

To select the appropriate USB Core to work with, user must add the following macro defines within the
compiler preprocessor (already done in the preconfigured projects provided with this application):
      - "USE_USB_HS" when using USB High Speed (HS) Core
      - "USE_USB_FS" when using USB Full Speed (FS) Core 

It is possible to fine tune needed USB Host features by modifying defines values in USBH configuration
file <20>usbh_conf.h<> available under the project includes directory, in a way to fit the application
requirements, such as:
  - Level of debug: USBH_DEBUG_LEVEL
                  0: No debug messages
                  1: Only User messages are shown
                  2: User and Error messages are shown
                  3: All messages and internal debug messages are shown
   By default debug messages are displayed on the debugger IO terminal; to redirect the Library
   messages on the LCD screen, lcd_log.c driver need to be added to the application sources.
 
  - Number of supported classes: USBH_MAX_NUM_SUPPORTED_CLASS  

@par Keywords

Middleware, USB Host, MSC, HID, Full-Speed, High-Speed, LCD, SD Card, Mass Storage, FatFS

@Note<74>If the user code size exceeds the DTCM-RAM size or starts from internal cacheable memories (SRAM1 and SRAM2),that is shared between several processors,
 <20><><A0><A0><A0>then it is highly recommended to enable the CPU cache and maintain its coherence at application level.
<0A><><A0><A0><A0><A0>The address and the size of cacheable buffers (shared between CPU and other masters)  must be properly updated to be aligned to cache line size (32 bytes).

@Note It is recommended to enable the cache and maintain its coherence, but depending on the use case
<0A><><A0><A0><A0> It is also possible to configure the MPU as "Write through", to guarantee the write access coherence.
<0A><><A0><A0><A0><A0>In that case, the MPU must be configured as Cacheable/Bufferable/Not Shareable.
<0A><><A0><A0><A0><A0>Even though the user must manage the cache coherence for read accesses.
<0A><><A0><A0><A0><A0>Please refer to the AN4838 <20>Managing memory protection unit (MPU) in STM32 MCUs<55>
<0A><><A0><A0><A0><A0>Please refer to the AN4839 <20>Level 1 cache on STM32F7 Series<65>

@par Directory contents

  - USB_Host/DynamicSwitch_Standalone/Src/main.c                  Main program
  - USB_Host/DynamicSwitch_Standalone/Src/usbh_diskio_dma.c       FatFS usbh diskio driver implementation
  - USB_Host/DynamicSwitch_Standalone/Src/system_stm32f7xx.c      STM32F7xx system clock configuration file
  - USB_Host/DynamicSwitch_Standalone/Src/stm32f7xx_it.c          Interrupt handlers
  - USB_Host/DynamicSwitch_Standalone/Src/menu.c                  Main Menu State Machine
  - USB_Host/DynamicSwitch_Standalone/Src/usbh_conf.c             General low level driver configuration
  - USB_Host/DynamicSwitch_Standalone/Src/msc_explorer.c          Explore the USB flash disk content
  - USB_Host/DynamicSwitch_Standalone/Src/file_operations.c       Write/read file on the disk 
  - USB_Host/DynamicSwitch_Standalone/Src/msc_menu.c              MSC State Machine
  - USB_Host/DynamicSwitch_Standalone/Src/hid_menu.c              HID State Machine
  - USB_Host/DynamicSwitch_Standalone/Src/mouse.c                 HID mouse functions  
  - USB_Host/DynamicSwitch_Standalone/Src/keyboard.c              HID keyboard functions
  - USB_Host/DynamicSwitch_Standalone/Inc/main.h                  Main program header file
  - USB_Host/DynamicSwitch_Standalone/Inc/usbh_diskio_dma.h       FatFS usbh diskio driver header file
  - USB_Host/DynamicSwitch_Standalone/Inc/stm32f7xx_it.h          Interrupt handlers header file
  - USB_Host/DynamicSwitch_Standalone/Inc/lcd_log_conf.h          LCD log configuration file
  - USB_Host/DynamicSwitch_Standalone/Inc/stm32f7xx_hal_conf.h    HAL configuration file
  - USB_Host/DynamicSwitch_Standalone/Inc/usbh_conf.h             USB Host driver Configuration file
  - USB_Host/DynamicSwitch_Standalone/Inc/ffconf.h                FatFs Module Configuration file
 

@par Hardware and Software environment

  - This application runs on STM32F723xx devices.
    
  - This application has been tested with STMicroelectronics STM32F723IE-Discovery Rev. C
    boards and can be easily tailored to any other supported device and development
    board.

  - STM32F723E-Discovery Set-up
    - Plug the USB device into the STM32F723E-Discovery board through 'USB micro A-Male 
      to A-Female' cable to the connector:
      - CN19 : to use USB High Speed (HS) 
      - CN18 : to use USB Full Speed (FS)

@par How to use it ?

In order to make the program work, you must do the following :
 - Open your preferred toolchain 
 - Rebuild all files and load your image into target memory
 - In the workspace toolbar select the project configuration:
   - STM32F723E-DISCOVERY_USBH-HS: to configure the project for STM32F723xx devices using USB OTG HS peripheral
   - STM32F723E-DISCOVERY_USBH-FS: to configure the project for STM32F723xx devices using USB OTG FS peripheral
 - Run the application
 
 * <h3><center>&copy; COPYRIGHT STMicroelectronics</center></h3>
 */
readme.txt Unescape Escape

readme.txt
