Question

Hi, I have a question about Atmel 8-bit AVR coding, so if you know the subject please help me!

Please if you can, write code that will output an arbitrary string by blinking the LED(LED of the AVR Microcontroller board) in Morse code. The method you choose must output any standard null-terminated string containing characters A-Z or 0-9 in Morse code on the board's LED. For the demo, a child function, called from main( ) should output the string in Morse code, using a method that will work for any arbitrary string constant (in other words, main should pass the address of the null-terminated ASCII string to the child function) The program is recommended to have different functions for dot, dash, and spacing. (The functions can be called based on the desired output.)

Answer 1

The system that is developed must satisfy the following requirements:

• It must execute on an Arduino. The Arduino version used was version 1.8.8. Most Arduino versions will work.
• It must display a user typed string, such as “Hello World”, as Morse code on an LED (or several LEDs), or an LCD.
  • A dash is three times as long as a dot.
  • The time between each dot or dash in the same letter is equal to the duration of one dot.
  • The time between two letters is the duration of one dash.
  • The time between two words is the same duration as seven dots.
• It must use a Round Robin design where a loop:
  • Waits for a string
  • Displays the string in Morse code
  • Exits the loop only if a sentinel is entered (e.g. !)

Here is the source code that you will need to load to your Arduino

Here are the steps for the Morse code LED system:

• Step 1. Prompt the user to enter a message on the Serial Monitor. The input for the message contains characters (letters and/or numbers).
• Step 2. Read each character, one at a time.
• Step 3. Convert each character into the equivalent Morse Code.
• Step 4. Convert each Morse code sequence into the corresponding sequence of dots and dashes.
• Step 5. Transmit the dots and dashes to the LED while transmitting the message to the Serial Monitor.
• Step 6. Exit the loop if user enters the sentinel value of “!”

The following components are used for the Morse code LED system. You will need:

• Arduino Uno
• Basic Red LED – 5mm
• 330 Ohm Resistor, 1/4 Watt, 5% tolerance
• Solderless Breadboard