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112 lines
5.8 KiB
Plaintext
112 lines
5.8 KiB
Plaintext
/**
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@page CustomHID_Standalone USB Device Custom HID example
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@verbatim
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******************************************************************************
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* @file USB_Device/CustomHID_Standalone/readme.txt
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* @author MCD Application Team
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* @brief Description of the USB Custom HID example.
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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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@endverbatim
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@par Example Description
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Use of the USB device application based on the Custom HID Class.
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This is a typical example on how to use the STM32F3xx USB Device peripheral, where the STM32 MCU is
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enumerated as a HID compliant device using the native PC Host HID driver to which the STM32303C-EVAL board
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is connected.
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At the beginning of the main program the HAL_Init() function is called to reset all the peripherals,
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initialize the Flash interface and the systick. The user is provided with the SystemClock_Config()
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function to configure the system clock (SYSCLK) to run at 72 MHz. The Full Speed (FS) USB module uses
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internally a 48-MHz clock, which is generated from an integrated PLL.
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It is possible to remappe the USB interrupts (USB_LP and USB_WKUP) on interrupt lines 75 and 76.
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User can select USB line Interrupt through macro defined in main.h.
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(USE_USB_INTERRUPT_DEFAULT and USE_USB_INTERRUPT_REMAPPED)
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@note The application needs to ensure that the SysTick time base is set to 1 millisecond
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to have correct HAL configuration.
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@note To reduce the example footprint, the toolchain dynamic allocation is replaced by a static allocation
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by returning the address of a pre-defined static buffer with the HID class structure size.
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@note Care must be taken when using HAL_Delay(), this function provides accurate delay (in milliseconds)
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based on variable incremented in SysTick ISR. This implies that if HAL_Delay() is called from
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a peripheral ISR process, then the SysTick interrupt must have higher priority (numerically lower)
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than the peripheral interrupt. Otherwise the caller ISR process will be blocked.
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To change the SysTick interrupt priority you have to use HAL_NVIC_SetPriority() function.
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To test the application, user must proceed as follows:
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- Start the "USB HID Demonstrator" PC applet and connect STM32 USB to PC
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- The device should be detected and shown in the USB HID target box
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- Press Graphic View button
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- Select "use SET_FEATURE" or "use SET_REPORT" in order to use SET_REPORT request to send HID Report
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for LED control
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- Use the potentiometer of the STM324xG-EVAL board to transfer the result of the converted voltage
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(via the ADC) the to the PC host (these values are sent to the PC using the endpoint1 IN)
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- Make sure that following report ID are configured: LED1 ID (0x1), LED2 ID(0x2), LED3 ID(0x3),
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LED4 ID(0x4), BUTTON1_ID(0x5) and Potentiometer_ID(0x7).
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- Select LEDs to switch on/off on the STM32303C-EVAL board: a SET_REPORT request will be sent
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@note Care must be taken when using HAL_Delay(), this function provides accurate delay (in milliseconds)
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based on variable incremented in SysTick ISR. This implies that if HAL_Delay() is called from
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a peripheral ISR process, then the SysTick interrupt must have higher priority (numerically lower)
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than the peripheral interrupt. Otherwise the caller ISR process will be blocked.
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To change the SysTick interrupt priority you have to use HAL_NVIC_SetPriority() function.
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@note The application need to ensure that the SysTick time base is always set to 1 millisecond
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to have correct HAL operation.
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@note The built-in USB peripheral of the STM32F3x does not provide a specific interrupt for USB cable plug/unplug
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detection. The correct way to detect the USB cable plug/unplug is to detect the availability of the VBUS line
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using a normal GPIO pin (external interrupt line).
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@par Directory contents
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- USB_Device/CustomHID_Standalone/Src/main.c Main program
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- USB_Device/CustomHID_Standalone/Src/system_stm32f3xx.c STM32F3xx system clock configuration file
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- USB_Device/CustomHID_Standalone/Src/stm32f3xx_it.c Interrupt handlers
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- USB_Device/CustomHID_Standalone/Src/stm32f3xx_hal_msp.c HAL MSP module
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- USB_Device/CustomHID_Standalone/Src/usbd_conf.c General low level driver configuration
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- USB_Device/CustomHID_Standalone/Src/usbd_desc.c USB device descriptor
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- USB_Device/CustomHID_Standalone/Inc/main.h Main program header file
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- USB_Device/CustomHID_Standalone/Inc/stm32f3xx_it.h Interrupt handlers header file
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- USB_Device/CustomHID_Standalone/Inc/stm32f3xx_hal_conf.h HAL configuration file
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- USB_Device/CustomHID_Standalone/Inc/usbd_conf.h USB device driver Configuration file
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- USB_Device/CustomHID_Standalone/Inc/usbd_desc.h USB device descriptor header file
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@par Hardware and Software environment
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- This example runs on STM32F303xx devices.
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- This example has been tested with STMicroelectronics STM32303C-EVAL
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evaluation boards and can be easily tailored to any other supported device
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and development board.
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- STM32303C-EVAL Set-up
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- Connect the STM32303C-EVAL board to the PC through 'USB Type A-Male
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to A-Male'
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@par How to use it ?
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In order to make the program work, you must do the following:
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- Open your preferred toolchain
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- Rebuild all files and load your image into target memory
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- Run the example
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*/
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