Daisy LED Morse code

This is a test program to run in the Arduino IDE.

Refer to these instructions to get started.

Daisyduino

It is also recommended to install the Daisyduino library within the IDE for Arduinio support.

Once the Arduino is installed and running:

• Go to Tools > Manage Libraries....
• Search for and install Daisyduino.

STM32CubeProgrammer

In order to upload your compiled code, you will need STM32CubeProgrammer to be installed.

Configuring the Arduino IDE for the Daisy

In order to configure the Arduino IDE for the Daisy:

• Go to Tools > Board > Board Manager....
• Choose type "Contributed" and search for and select STM32 MCU based boards.
• Go to Tools > Board > STM32 boards groups and select Generic STM32H7 Series.
• Go to Tools > Board part number and select Daisy Seed.
• Go to Tools > U(S)ART support and select Enabled (generic 'Serial').
• Go to Tools > USB support and select CDC (generic 'Serial' supersede U(S)ART).
• Go to Tools > USB speed and select Low/Full Speed.
• Go to Tools > Upload method and select STM32CubeProgrammer (DFU).

Testing

In order to set up your Daisy Seed to receive your code:

1. Plug in your Daisy Seed to your computer.
2. Let any drivers install.
3. To flash the code to the board, hold the BOOT button, press and release the RESET button, and finally release the BOOT button.
4. Run the program in the Arduinio IDE by selecting Sketch > Upload.
5. The code should compile, then be sent to the Daisy board. It will run infinitely on a loop.
6. After making any changes to the code, it can be re-compiled and by starting again from step 3.

Making changes to the code

This software is programmed to make the LED on the board blink in Morse code. Initially, it is programmed to blink the phrase "HELLO WORLD". This can be changed by modifying the code within the void loop() function block.

There are 36 pre-built functions included, for each letter of the alphabet and numbers 0-9. Any of these can be run by calling the blink_$() function ($ represents any alphanumeric character). The variable unit at the top of the file is base milliseconds used to control the global blink speed. A lower number makes it blink faster, and a higher number makes it blink slower.

There are also variables called space_between_letters and space_between_words. Traditionally, this is the standard followed by International Morse code rules. The initial code can be understood like this:

void loop() {
    // "HELLO"
    blink_h();
    delay(space_between_letters); // (short pause)
    blink_e();
    delay(space_between_letters); // (short pause)
    blink_l();
    delay(space_between_letters); // (short pause)
    blink_l();
    delay(space_between_letters); // (short pause)
    blink_o();
    delay(space_between_words); // (longer pause)

    // "WORLD"
    blink_w();
    delay(space_between_letters); // (short pause)
    blink_o();
    delay(space_between_letters); // (short pause)
    blink_r();
    delay(space_between_letters); // (short pause)
    blink_l();
    delay(space_between_letters); // (short pause)
    blink_d();
    delay(space_between_words); // (longer pause)
}

As an easier example, the rhythm from Rush's song "YYZ" could be created by changing the code to this:

void loop() {
    blink_y();
    blink_y();
    blink_z();
}

The custom blink_$() functions all make use of other custom functions blink_dot() and blink_dash(), which are built on alternations of digitalWrite(LED_BUILTIN, HIGH) and digitalWrite(LED_BUILTIN, LOW) functions, which turn the LED on and off, with a delay(x) in the middle. The delay speed can be adjusted by modifying the value of the global variable unit.