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First attempt at using Ada to program the STM32F4 Discovery board

Here's my first attempt at pushing the user button to blink the red LED on a STM32F4 Discovery board, using AdaCore's GNAT Community Edition.


What you need:
STM32F4 Discovery board
GNAT Community Edition (download and install both the compiler toolchain and the arm-elf)
Ada Drivers Library with examples

It's been a while since I had my STM32 boards installed on my computer, so you may (or may not) need to install a driver for the ST-LINK/V2 programmer...

1. Connect the board, you should have a STM32 STLink device.

2. Start GPS (GNAP Programming Studio).

3. Open one of the examples from the Drivers library / examples / STM32F4_DISCO.

4. Edit main.adb and replace all text with the following source code.
----------------------------------------------------------------
--                                                            --
-- Testing user button and red LED on STM32F4 Discovery board --
--                                                            --
----------------------------------------------------------------

with Ada.Real_Time;      use Ada.Real_Time;
with STM32.Board;        use STM32.Board;
with STM32.User_Button;

procedure Main is

   procedure My_Delay (Milli : Natural);

   procedure My_Delay (Milli : Natural) is
   begin
      delay until Clock + Milliseconds (Milli);
   end My_Delay;

begin
   Initialize_LEDs;

   STM32.User_Button.Initialize;

   loop
      if STM32.User_Button.Has_Been_Pressed then
         STM32.Board.Red_LED.Set;
         My_Delay (100);
         STM32.Board.Red_LED.Clear;
      end if;
   end loop;

end Main;

5. Click the Flash to Board icon.

6. Enjoy :)


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