STM32F4 Programming in C 2- Interrupt Push Button and LED coding in Keil

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Blink LED using Push Button external Interrupt on STM32F4 Discovery Board. The code was generated using ST Microelectronics STM32CubeMx software.

The STM32F4DISCOVERY Discovery kit allows users to easily develop applications with the STM32F407 high-performance microcontrollers with ARM®Cortex®-M4 32-bit core. It includes everything required either for beginners or for experienced users to get quickly started.

Based on the STM32F407VGT6, it includes an ST-LINK/V2 or ST-LINK/V2-A embedded debug tool, two ST MEMS digital accelerometers, a digital microphone, one audio DAC with an integrated class D speaker driver, LEDs and push buttons and a USB OTG micro-AB connector.

Key Features:
STM32F407VGT6 microcontroller featuring 32-bit ARM Cortex® -M4 with FPU core, 1-Mbyte Flash memory, 192-Kbyte RAM in an LQFP100 package
On-board ST-LINK/V2 on STM32F4DISCOVERY or ST-LINK/V2-A on STM32F407G-DISC1
ARM® mbed™ -enabled (http://mbed.org) with ST-LINK/V2-A only
USB ST-LINK with re-enumeration capability and three different interfaces:
Virtual com port (with ST-LINK/V2-A only)
Mass storage (with ST-LINK/V2-A only)
Debug port
Board power supply: through USB bus or from an external 5 V supply voltage
External application power supply: 3 V and 5 V
LIS302DL or LIS3DSH ST MEMS 3-axis accelerometer
MP45DT02 ST MEMS audio sensor omnidirectional digital microphone
CS43L22 audio DAC with integrated class D speaker driver
Eight LEDs:
LD1 (red/green) for USB communication
LD2 (red) for 3.3 V power on
Four user LEDs, LD3 (orange), LD4 (green), LD5 (red) and LD6 (blue)
2 USB OTG LEDs LD7 (green) VBUS and LD8 (red) over-current
Two push buttons (user and reset)
USB OTG FS with micro-AB connector
Extension header for all LQFP100 I/Os for quick connection to prototyping board and easy probing
Comprehensive free software including a variety of examples, part of STM32CubeF4 package or STSW-STM32068 for legacy standard libraries usage.

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