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// _____________________ Header Files _____________________
#include <ee108.h>
#include <ee108_switches.h>
#include <string.h>
// _________________________ Types ________________________
struct MorseCode {
const char decodedChar; // this represents the decoded character
const char *encodedStr; // the represents the morse encoding
};
typedef struct MorseCode MorseCode;
// ___________________ Function declaration ________________
const MorseCode * findMorseCode(const char * combination);
void printCombination (const MorseCode * pMorseData);
// _______________________ Constants _______________________
// lookup table to allow conversion from characters to morse codes
// and from morse codes to characters
const MorseCode MORSE_TABLE[] = {
{ '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', "--.." },
{ '0', ".----" },
{ '1', "..---" },
{ '2', "...--" },
{ '3', "....-" },
{ '4', "....." },
{ '5', "-...." },
{ '6', "--..." },
{ '7', "---.." },
{ '8', "----." },
{ '9', "-----" }
};
const int SUPERLOOP_DELAY_MS = 25;
const int MORSE_TABLE_SIZE = sizeof(MORSE_TABLE) / sizeof(MORSE_TABLE[0]);
const int BUFFER_SIZE = 11;
// ___________________ Function Declarration __________________
int compare_strings(char a[], char b[]);
// ____________________________________________________________
void setup() {
// set up serial
Serial.begin(9600);
Serial.println("\n\n\t________A4_SerialMorseToChar________\n");
Serial.println("\n\tType a pattern of . and - chars & hit send:");
}
void loop() {
char buf[BUFFER_SIZE] = "";
int bufIndex = 0;
// read characters & break out of while loop if end of line,
// space character or max buffer size is detected.
while (bufIndex < BUFFER_SIZE) {
char symbol;
// wait until at least one character has been entered
while (Serial.available() == 0) {
delay(10);
continue;
}
// OK, we now have at least 1 character
symbol = Serial.read(); // read 1 character
// a newline or space indicates the end of the word
// so we'll break out to process it
if ((symbol == '\n') || (symbol == '\r') || (symbol == isspace(symbol))) {
if (bufIndex > 0)
break;
}
// ignore any characters that are not......
if (symbol != '.' && symbol != '-' && !isalpha(symbol) && !isdigit(symbol))
continue; // go directly to next iteration of while loop
// at this point only valid characters should be left
buf[bufIndex] = symbol; // add the character to the buffer
bufIndex++; // increment index
}
// newline, space or max number of characters?
buf[bufIndex] = '\0'; // add nul terminator to buf
Serial.print("\tInput was: ");
Serial.println(buf);
// ...........................................................
String str(MORSE_TABLE[0].decodedChar);
// I will add null terminator in more appropiate way later..
str[1] = '\0';
Serial.println(str);
//Serial.println(strcasecmp(buf, str));
Serial.println(MORSE_TABLE[0].decodedChar);
Serial.println(strcasecmp(buf, str));
// ...........................................................
for (int i = 0; i < strlen(buf); i++) {
if (buf[i] != '.' && buf[i] != '-') {
Serial.print("\tDecoded character is: ");
Serial.println("LETTER");
break;
}
else {
int match = findMorseCode(buf);
printCombination(match);
break;
}
}
if (Serial.available() == 0)
Serial.println("\n\tType a pattern of . and - chars & hit send:");
}
// ___________________ Function Declarration __________________
// _______________________ Function 1 _______________________
const MorseCode * findMorseCode(const char * combination) {
int i;
for (i = 0; i < MORSE_TABLE_SIZE; i++) {
if (strcasecmp(combination, MORSE_TABLE[i].encodedStr) == 0)
return &MORSE_TABLE[i]; // yes, return a pointer to the matching entry
}
return NULL;
}
// _______________________ Function 2 _______________________
void printCombination (const MorseCode * pMorseData) {
Serial.print("\tDecoded character is: ");
if (pMorseData)
Serial.println(pMorseData->decodedChar);
else
Serial.println("UNKNOWN");
}
// ____________________________________________________________
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