Reorganized morsecode symbols array and updated the MorseClient::write(uint8_t b) method
The whole idea was taken from the CubeSat way of doing morsecode,
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Marco Campinoti
GitHub
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4272b0ff30
2 changed files with 107 additions and 104 deletions
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@ -4,68 +4,79 @@
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/*!
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\cond RADIOLIB_DOXYGEN_HIDDEN
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*/
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struct Morse_t {
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char c; // ASCII character
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char m[7]; // Morse code representation
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};
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/*!
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\endcond
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*/
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// array of all Morse code characters
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const Morse_t MorseTable[MORSE_LENGTH] PROGMEM = {
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{'A', ".-"},
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{'B',"-..."},
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{'C', "-.-."},
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{'D',"-.."},
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{'E',"."},
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{'F',"..-."},
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{'G',"--."},
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{'H',"...."},
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{'I',".."},
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{'J',".---"},
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{'K',"-.-"},
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{'L',".-.."},
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{'M',"--"},
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{'N',"-."},
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{'O',"---"},
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{'P',".--."},
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{'Q',"--.-"},
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{'R',".-."},
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{'S',"..."},
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{'T',"-"},
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{'U',"..-"},
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{'V',"...-"},
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{'W',".--"},
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{'X',"-..-"},
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{'Y',"-.--"},
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{'Z',"--.."},
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{'1',".----"},
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{'2',"..---"},
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{'3',"...--"},
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{'4',"....-"},
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{'5',"....."},
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{'6',"-...."},
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{'7',"--..."},
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{'8',"---.."},
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{'9',"----."},
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{'0',"-----"},
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{'.',".-.-.-"},
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{',',"--..--"},
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{':',"---..."},
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{'?',"..--.."},
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{'\'',".----."},
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{'-',"-....-"},
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{'/',"-..-."},
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{'(',"-.--."},
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{')',"-.--.-"},
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{'\"',".-..-."},
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{'=',"-...-"},
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{'+',".-.-."},
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{'@',".--.-."},
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{' ',"_"}, // space is used to separate words
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{0x01,"-.-.-"}, // ASCII SOH (start of heading) is used as alias for start signal
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{0x02,".-.-."} // ASCII EOT (end of transmission) is used as alias for stop signal
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//----------------------------------------------------------------------------------------
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// In the below array we represent dots as 0 and dashes as 1, using a further bit as
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// 'guard' who tell us when we must stop in decoding our symbols.
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// Some bytes are zeroed because there isn't a morse code representation of that char.
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// The ascii code of the letter is the search index into the array for the correspondent
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// morse code representation.
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//----------------------------------------------------------------------------------------
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const uint8_t morse_lookuptable[64] PROGMEM = {
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0b00, // space 0x00
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0b1110101, // ! 117
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0b1010010, // " 82
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0b00, // # (doesn't exists)<--
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0b11001000, // $ 200
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0b00, // % (doesn't exists)<--
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0b100010, // & 34
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0b1011110, // ' 94
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0b101101, // ( 45
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0b1101101, // ) 109
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0b00, // * (doesn't exists)<--
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0b101010, // + 42
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0b1110011, // , 115
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0b1100001, // - 97
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0b1101010, // . 106
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0b101001, // / 41
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0b111111, // 0 63
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0b111110, // 1 62
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0b111100, // 2 60
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0b111000, // 3 56
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0b110000, // 4 48
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0b100000, // 5 32
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0b100001, // 6 33
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0b100011, // 7 35
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0b100111, // 8 39
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0b101111, // 9 47
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0b1000111, // : 71
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0b1101010, // ; 106
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0b00, // < (doesn't exists)<--
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0b110001, // = 49
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0b00, // > (doesn't exists)<--
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0b1001100, // ? 76
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0b1010110, // @ 86
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0b110, // A 6
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0b10001, // B 17
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0b10101, // C 21
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0b1001, // D 9
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0b10, // E 2
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0b10100, // F 20
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0b1011, // G 11
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0b10000, // H 16
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0b100, // I 4
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0b11110, // J 30
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0b1101, // K 13
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0b10010, // L 18
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0b111, // M 7
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0b101, // N 5
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0b1111, // O 15
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0b10110, // P 22
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0b11011, // Q 27
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0b1010, // R 10
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0b1000, // S 8
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0b11, // T 3
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0b1100, // U 12
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0b11000, // V 24
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0b1110, // W 14
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0b11001, // X 25
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0b11101, // Y 29
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0b10011, // Z 19
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0b00, // [ (doesn't exists)<--
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0b00, // \ (doesn't exists)<--
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0b00, // ] (doesn't exists)<--
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0b00, // ^ (doesn't exists)<--
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0b1101100 // _ 108
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};
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MorseClient::MorseClient(PhysicalLayer* phy) {
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@ -106,50 +117,38 @@ size_t MorseClient::write(uint8_t* buff, size_t len) {
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}
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size_t MorseClient::write(uint8_t b) {
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// find the correct Morse code in array
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Morse_t mc;
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bool found = false;
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for(uint8_t pos = 0; pos < MORSE_LENGTH; pos++) {
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memcpy_P(&mc, &MorseTable[pos], sizeof(Morse_t));
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if(mc.c == toupper(b)) {
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found = true;
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break;
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}
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}
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// check if the requested code was found in the array
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if(found) {
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RADIOLIB_DEBUG_PRINT(mc.c);
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RADIOLIB_DEBUG_PRINT('\t');
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RADIOLIB_DEBUG_PRINTLN(mc.m);
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// iterate over Morse code representation and output appropriate tones
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for(uint8_t i = 0; i < strlen(mc.m); i++) {
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switch(mc.m[i]) {
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case '.':
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_phy->transmitDirect(_base);
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delay(_dotLength);
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break;
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case '-':
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_phy->transmitDirect(_base);
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delay(_dotLength * 3);
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break;
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case '_':
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// do nothing (word space)
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break;
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}
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//Note: using toupper() you always find a char, because all possible chars are included in this array!
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uint8_t ditdah_code = 0x00;
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if (b == ' ') {
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RADIOLIB_DEBUG_PRINTLN('space'); // inter-words pause (space)
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// symbol space
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_phy->standby();
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delay(_dotLength * 3);
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}
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ditdah_code = morse_lookuptable[(uint8_t)(toupper(b) - 32)]; // retrieve morse code from lookuptable
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//do it until 'guardbit' is reached
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while (ditdah_code > GUARDBIT) {
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if (ditdah_code & DAH) {
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RADIOLIB_DEBUG_PRINT('-'); // tx a 'dah'
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_phy->transmitDirect(_base);
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delay(_dotLength * 3);
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}
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else{
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RADIOLIB_DEBUG_PRINT('.'); // tx a 'dit'
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_phy->transmitDirect(_base);
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delay(_dotLength);
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}
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ditdah_code >>= 1; // analyze next bit
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}
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// letter space
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RADIOLIB_DEBUG_PRINTLN();
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delay(_dotLength * 3);
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return(1);
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}
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_phy->standby();
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delay(_dotLength);
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return(0);
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}
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@ -4,7 +4,11 @@
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#include "../../TypeDef.h"
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#include "../PhysicalLayer/PhysicalLayer.h"
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#define MORSE_LENGTH 52
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//#define MORSE_LENGTH 52
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#define MORSE_LENGTH 64
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#define DIT 0b0
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#define DAH 0b1
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#define GUARDBIT 0b1
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/*!
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\class MorseClient
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