How to use STM32 in the ARDUINO IDE

Now is possible use some STM32 in the ARDUINO IDE.
For do this follow the steps below.

  • Download and install the Arduino IDE
  • Launch Arduino IDE.
    Click on File menu and then Preferences
    The Preferences dialog will open, then add the following link to the Additional Boards Managers URLs field:https://github.com/stm32duino/BoardManagerFiles/raw/master/STM32/package_stm_index.jsonClick Ok twice
    See below.
  • Click on Tools menu and then “Boards > Boards Manager
    Next in the box n.4 type: stm32
    and install all the boards that appears (5, 6 and 7).
    See below.
  • Now select again: Tools > Boards
    and choose the STM32 board that you want to use.
    See below, I selected the NUCLEO L476RG
  • Now select: Mass Storage
    See below.
  • And now select the COM port where is connected your NUCLEO L476RG, see below.
    Do not worry if it gives you an indication of a different board, in my case indicates NUCLEO F103RB. There is a problem of identification in the current IDE version but it works.
  • Remember: for address the I/O of the NUCLEO-XXX board you must refer to pinout of Arduino Uno R3, see below the light blue box (pin_1 … pin_19).
  • Now try to read one Digital InPut and send the result via USB Virtual-COM.
    Select: FILE > NEW
    and in the window that appear type the code below.

    // Read InPut PIN and send the result over USB-Virtual COM
    
    int pushButton = 2;
    
    void setup() {
    
      // initialize serial communication at 9600 bits per second:
    
      Serial.begin(9600);
    
      // make the pushbutton's pin an input:
    
      pinMode(pushButton, INPUT);
    
    }
    
    void loop() {
    
      // read the input pin:
    
      int buttonState = digitalRead(pushButton);
    
      // print out the state of the button:
    
      Serial.println(buttonState);
    
      delay(1);        // delay in between reads for stability
    
    }

    Compile   and download   it, next press the icon of the serial terminal
    You must see something like below.

    Below there is the button connection on the NUCLEO-L476RG.
    When you press the button, in the terminal you must see 0, if you release the button you must see 1.
    The button is Normally Open.

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