/**
@page HID_Standalone USB Host Human Interface (HID) application
@verbatim
******************** (C) COPYRIGHT 2017 STMicroelectronics *******************
* @file USB_Host/HID_Standalone/readme.txt
* @author MCD Application Team
* @brief Description of the USB Host HID application.
******************************************************************************
* @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.
*
******************************************************************************
@endverbatim
@par Application Description
This application shows how to use the USB host application based on the Human Interface Class (HID) on the STM32F4xx devices.
This is a typical application on how to use the STM32F4xx USB OTG Host peripheral to interact with an USB
HID Device such as a Mouse or a Keyboard.
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 168 MHz. The Full Speed (FS) USB module uses
internally a 48-MHz clock, which is generated from an integrated PLL. In the High Speed (HS) mode the
USB clock (60 MHz) is driven by the ULPI.
It's worth noting that the system clock (SYSCLK) can be configured, depending on the used USB Core:
- SYSCLK is set to 168 MHz: for FS Core (FS or HS-IN-FS), because used embedded PHY
requires 48 MHz clock, achieved only when system clock
is set to 168 MHz.
- SYSCLK is set to 180 MHz: for only HS Core, since no embedded PHY is used.
When the application is started, the connected HID device (Mouse/Keyboard) is detected in HID mode and
gets initialized. The STM32 MCU behaves as a HID Host, it enumerates the device and extracts VID, PID,
manufacturer name, Serial no and product name information and displays it on the LCD screen.
This application is based on interacting with a HID device (Mouse/Keyboard) through a HID routine.
A menu is displayed and the user can select any operation from the menu using the Joystick buttons:
- "Start HID" operation starts the appropriate HID application to the attached HID Device.
- "Start Mouse / Re-Initialize" operation starts Mouse HID application. Moving the mouse will move
the pointer in the display rectangle and if a button is pressed, the corresponding rectangle will be
highlighted in Blue.
- "Start Keyboard / Clear" operation starts Keyboard HID application. Taped Keyboard characters are
displayed on the LCD screen.
- "Re-Enumerate" operation performs a new Enumeration of the device.
@note In case of using an AZERTY keyboard, user should add "AZERTY_KEYBOARD" define to ensure correct
displaying taped characters.
@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
- "USE_USB_HS" and "USE_USB_HS_IN_FS" when using USB High Speed (HS) Core in FS mode
It is possible to fine tune needed USB Host features by modifying defines values in USBH configuration
file "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.
@par Keywords
Connectivity, USB_Host, HID, Full Speed, High Speed, Joystick, Mouse, Keyboard, enumerate
@par Directory contents
- USB_Host/HID_Standalone/Src/main.c Main program
- USB_Host/HID_Standalone/Src/system_stm32f4xx.c STM32F4xx system clock configuration file
- USB_Host/HID_Standalone/Src/stm32f4xx_it.c Interrupt handlers
- USB_Host/HID_Standalone/Src/menu.c HID State Machine
- USB_Host/HID_Standalone/Src/usbh_conf.c General low level driver configuration
- USB_Host/HID_Standalone/Src/mouse.c HID mouse functions file
- USB_Host/HID_Standalone/Src/keyboard.c HID keyboard functions file
- USB_Host/HID_Standalone/Inc/main.h Main program header file
- USB_Host/HID_Standalone/Inc/stm32f4xx_it.h Interrupt handlers header file
- USB_Host/HID_Standalone/Inc/lcd_log_conf.h LCD log configuration file
- USB_Host/HID_Standalone/Inc/stm32f4xx_hal_conf.h HAL configuration file
- USB_Host/HID_Standalone/Inc/usbh_conf.h USB Host driver Configuration file
@par Hardware and Software environment
- This application runs on STM32F429xx/STM32F439xx devices.
- This application has been tested with STMicroelectronics STM324x9I-EVAL RevB
evaluation boards and can be easily tailored to any other supported device
and development board.
- STM324x9I-EVAL RevB Set-up
- Plug the USB key into the STM324x9I-EVAL board through 'USB micro A-Male
to A-Female' cable to the connector:
- CN9 : to use USB High Speed (HS) with embedded PHY(U7)
- CN14: to use USB Full Speed (FS)
Please ensure that jumper JP16 is not fitted.
- CN15: to use USB HS-IN-FS.
Note that some FS signals are shared with the HS ULPI bus, so some PCB rework is needed.
For more details, refer to section 2.8 USB OTG2 HS & FS in UM1667
@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:
- STM324x9I-EVAL_USBH-HS: to configure the project for STM32F4xx devices using USB OTG HS peripheral
- STM324x9I-EVAL_USBH-FS: to configure the project for STM32F4xx devices using USB OTG FS peripheral
- STM324x9I-EVAL_USBH-HS-IN-FS: to configure the project for STM32F4xx devices and use USB OTG HS
peripheral In FS (using embedded PHY).
- Run the application
*/
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