STM32CubeF4

@verbatim
******************** (C) COPYRIGHT 2017 STMicroelectronics *******************
* @file Demonstrations/readme.txt
* @author MCD Application Team
* @brief Description STM32F4 Discovery Demo
******************************************************************************
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@endverbatim

@par Demo Description

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.
Then the SystemClock_Config() function is used to configure the system clock
(SYSCLK) to run at 168 MHz.

- Connect the STM32F4-Discovery RevB & RevC board to a PC with a 'USB type A to Mini-B' cable
through USB connector CN1 to power the board. Then red LED1 (COM) and
LED2 (PWR) light up.
- All 4 LEDs between B1 and B2 are blinking as chenillard.
- Press User Button B1 (User) then MEMS sensor (LIS302DL for revB or LIS3DSCH
for revC or LIS3DSH for revD) is enabled, move the board and observe the four Leds blinking according
to the motion direction.
- Connect the board to a PC with a second USB'type A to micro-B cable through USB
connector CN5, this convert it to a standard mouse. Move the STM32F4-Discovery
board and see the mouse moves according to the motion direction.
- Press B1 or B2 to restart demonstration.

@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.

@par Directory contents

- Demonstrations/Inc/stm32f4xx_hal_conf.h HAL configuration file
- Demonstrations/Inc/stm32f4xx_it.h Interrupt handlers header file
- Demonstrations/Inc/main.h Main program header file
- Demonstrations/Inc/ffconf.h FAT file system module configuration file
- Demonstrations/Inc/usbd_desc.h USB device HID descriptor header file
- Demonstrations/Inc/usbd_conf.h USB device driver Configuration file
- Demonstrations/Src/stm32f4xx_it.c Interrupt handlers
- Demonstrations/Src/main.c Main program
- Demonstrations/Src/usbd_desc.c USB device HID descriptor
- Demonstrations/Src/usbd_conf.c General low level driver configuration
- Demonstrations/Src/system_stm32f4xx.c STM32F4xx system clock configuration file
- Demonstrations/Src/stm32f4xx_hal_msp.c HAL MSP module file

@par Hardware and Software environment

- This Demo runs on STM32F407xx Devices.

- This example has been tested with STMicroelectronics STM32F4-Discovery RevB & RevC & RevD (MB997B & MB997C & MB997D)
and can be easily tailored to any other supported device and development board.

- STM32F4-Discovery RevB & RevC & RevD Set-up
- Connect the STM32F4-DISCO board through 'USB micro A-Male
A-Male' cable to the connector CN5.

@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
- Run the example