3. Demo examples

This section describes a simple application to make the four LEDs of the STM32 Discovery F407 blinking and reacting to the press of the blue button on the board.

The purpose of this example is to show how a single application can interact with the GPIOs, in both output mode (with the LEDs: PD12, PD13, PD14 and PD15) and input mode (with the push Button: PA0).

Two demo examples are provided:

• A ‘blinky’ standalone user task (see Blinky demo) executes on the top of Ewok. It toggles the board LEDs and waits for some blue button pressing events to switch the blinking pattern
• The ‘blinky with IPC’ demo (see Blinky with IPC demo) do the same as the ‘blinky’ app, but with two tasks communicating with IPC. On task manage the LEDs while the other receives events from the blue button.

• 3.1. Blinky demo
  • 3.1.1. Building and running the demo
  • 3.1.2. Understanding the demo code
• 3.2. Blinky with IPC demo
  • 3.2.1. The ‘button’ app
  • 3.2.2. The ‘leds’ app