3) Draw a detailed flowchart for Lab 4 assignments (below) that describes how ea

Question

3) Draw a detailed flowchart for Lab 4 assignments (below) that describes how each part of your program should work (your approach to reading characters from the serial port, getting the correct pattern for each incoming character, and then play the correct Morse code tones). Your flowchart should consist of a series ofgoals, the decisions involved in reaching each goal, and the actions taken after each decision Lab #4 Assignment Write a program that wll read a single human readable character from the serial port and send back a string that represents the Morse code pattern for that character TA Signature: Date201 Write a function that processes the Morse code pattern by playing the correct tones for each character and also printing the Morse code pattern to the serial port. TA Signature:.. Date:/201 Your program should use these values for the lengths of the various delays you'll encounter in this assignment Type Dit (short) Dah (long) Space between dits and dahs500 milliseconds Space between letters Space between words Duration 100 milliseconds 300 milliseconds 300 milliseconds 700 milliseconds

Explanation / Answer

Please find the Arduino Program for Morse Code:-

// Defined led pin
#define PIN_LED 13

// All morse delays
#define MORSE_DELAY 200
#define MORSE_DELAY_DOT (MORSE_DELAY * 1)
#define MORSE_DELAY_DASH (MORSE_DELAY * 3)
#define MORSE_DELAY_SPACE (MORSE_DELAY * 7)

// All morse characters
#define MORSE_DOT '.'
#define MORSE_DASH '-'

/**
* All morse letters
* @var *char[]
*/
char* MORSE_LETTERS[] = {
".-", // A
"-...", // B
"-.-.", // C
"-..", // D
".", // E
"..-.", // F
"--.", // G
"....", // H
"..", // I
".---", // J
"-.-", // K
".-..", // L
"--", // M
"-.", // N
"---", // O
".--.", // P
"--.-", // Q
".-.", // R
"...", // S
"-", // T
"..-", // U
"...-", // V
".--", // W
"-..-", // X
"-.--", // Y
"--.." // Z
};

/**
* All morse numbers
* @var *char[]
*/
char* MORSE_NUMBERS[] = {
"-----", // 0
".----", // 1
"..---", // 2
"...--", // 3
"....-", // 4
".....", // 5
"-....", // 6
"--...", // 7
"---..", // 8
"----." // 9
};

/**
* Setup function
* Initialize communication with the serial monitor
* @returns void
*/
void setup() {
pinMode(PIN_LED, OUTPUT);
Serial.begin(9600);
}

/**
* Loop function
* Code runs forever until the arduino dies
*
* How the code figures out the position of the character:
*
* If you send: "Hello" it starts with "H"
* H = 0x48 (decimal: 72)
* A = 0x41 (decimal: 65)
*
* 72 - 65 = 7
*
* 7th in the alphabet = H
* MORSE_LETTERS[7] = H = ....
*
* @returns void
*/
void loop() {

// Current character sent from the serial
char current;
  

// Is there anything to be read from USB?
if (Serial.available()) {

// Read a single letter
current = Serial.read();

// Lower case letters
if (current >= 'a' && current <= 'z') {
flashSequence(MORSE_LETTERS[current - 'a']);
}

// Capital case letters
else if (current >= 'A' && current <= 'Z') {
flashSequence(MORSE_LETTERS[current - 'A']);
}

// Numbers
else if (current >= '0' && current <= '9') {
flashSequence(MORSE_NUMBERS[current - '0']);
}

// Space character (3500 ms)
else if (current == ' ') {
delay(MORSE_DELAY_SPACE);
}
  

// Print output back
if (current == '') {
Serial.println("");
} else {
Serial.print(current);
}
}
}

/**
* Flash a sequence of characters
* @param char* sequence
* @returns void
*/
void flashSequence (char* sequence) {

// Counter
int i = 0;

// Loop through every character until an 'end-of-line' (null) character is found
while (sequence[i] != '') {
flashDotOrDash(sequence[i]);
i++;
}

// Delay between every letter
delay(MORSE_DELAY * 3);
}

/**
* Flash a single character
* @param char
* @returns void
*/
void flashDotOrDash (char unit) {

// Turn led on
digitalWrite(PIN_LED, HIGH);

// Unit is a dot (500 ms)
if (unit == MORSE_DOT) {
delay(MORSE_DELAY_DOT);
}

// Unit is a dash (1500 ms)
if (unit == MORSE_DASH) {
delay(MORSE_DELAY_DASH);
}

// Turn led off and add a delay between a dot and dash (500)
// Inter-element gap
digitalWrite(PIN_LED, LOW);
delay(MORSE_DELAY);
}

Please let me know in case of any clarifications required. Thanks!

Related Questions

Navigate

• Browse (All)
• Browse 3
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.