Morse Encoder/Decoder Library. Transforms char array to binary array and vice-versa.
A Morse Encoding/Decoding Library \n Transforms char arrays into bool arrays and vice-versa
Morse code taken from http://en.wikipedia.org/wiki/Morse_code
Added some more characters :
- : DOT DOT DASH DASH
_ : DASH DASH DASH DOT
. : DASH DASH DASH DASH
/ : DOT DASH DOT DASH
@ : DOT DOT DOT DASH DOT
? : DOT DOT DASH DOT DOT
Here is an quick hello-world that show how to use this library
#include "mbed.h #include "Morse.h" Serial pc(USBTX, USBRX); int main() { int i; Morse_data* data; char message[] = "Hello World"; data = morse_create(morse_getBoolSize(message)); morse_encode(message, data); for (i=0; i<data->length; i++) pc.printf("%d", data->data[i]); morse_decode(data, message); pc.printf("\nMessage was : %s\n", message); while(1); }
Diff: MorseEncoder.cpp
- Revision:
- 0:4648894e0d80
- Child:
- 1:84ef66bf435d
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/MorseEncoder.cpp Tue Sep 16 16:51:31 2014 +0000 @@ -0,0 +1,93 @@ +#include "MorseEncoder.h" +#include "Morse.h" + +const unsigned int MorseEncoder::_values_size[36] = {MORSE_0_SIZE, MORSE_1_SIZE, MORSE_2_SIZE, MORSE_3_SIZE, MORSE_4_SIZE, MORSE_5_SIZE, MORSE_6_SIZE, MORSE_7_SIZE, MORSE_8_SIZE, MORSE_9_SIZE, + MORSE_A_SIZE, MORSE_B_SIZE, MORSE_C_SIZE, MORSE_D_SIZE, MORSE_E_SIZE, MORSE_F_SIZE, MORSE_G_SIZE, MORSE_H_SIZE, MORSE_I_SIZE, MORSE_J_SIZE, + MORSE_K_SIZE, MORSE_L_SIZE, MORSE_M_SIZE, MORSE_N_SIZE, MORSE_O_SIZE, MORSE_P_SIZE, MORSE_Q_SIZE, MORSE_R_SIZE, MORSE_S_SIZE, MORSE_T_SIZE, + MORSE_U_SIZE, MORSE_V_SIZE, MORSE_W_SIZE, MORSE_X_SIZE, MORSE_Y_SIZE, MORSE_Z_SIZE}; + +const bool MorseEncoder::_values[36][5] = {MORSE_0, MORSE_1, MORSE_2, MORSE_3, MORSE_4, MORSE_5, MORSE_6, MORSE_7, MORSE_8, MORSE_9, + MORSE_A, MORSE_B, MORSE_C, MORSE_D, MORSE_E, MORSE_F, MORSE_G, MORSE_H, MORSE_I, MORSE_J, + MORSE_K, MORSE_L, MORSE_M, MORSE_N, MORSE_O, MORSE_P, MORSE_Q, MORSE_R, MORSE_S, MORSE_T, + MORSE_U, MORSE_V, MORSE_W, MORSE_X, MORSE_Y, MORSE_Z}; + +unsigned int MorseEncoder::find(char c) { + unsigned int i=37; + if (c>='0' && c<='9') i=c-'0'; + else if (c>='A' && c<='Z') i=c-'A'+10; + else if (c>='a' && c<='z') i=c-'a'+10; + return i; +} + +unsigned int MorseEncoder::addChar(unsigned int index_value, bool* result, unsigned int place) { + unsigned char i,j; + i=0; + for (j=0; j<_values_size[index_value]; j++) { + if (_values[index_value][i]==DOT) { // if DOT + result[place+j] = true; + } else { // else DASH + result[place+j] = true; + result[place+j+1]=true; + result[place+j+2]=true; + j+=2; + } + j++; // add a blank + i++; // next element + } + + return j-1; +} + +MorseEncoder_data* MorseEncoder::encode(char* word) { + int char_i; + unsigned int size; + unsigned int morse_i; + unsigned int res_counter; + MorseEncoder_data* data = new MorseEncoder_data; + bool* res; + + // first loop to know the size + size = 0; + for (char_i=0; word[char_i]!='\0'; char_i++) { + if (word[char_i]!=' ') { // if not space + morse_i = find(word[char_i]); + if (morse_i==37) continue; // if not found + + size += _values_size[morse_i]; + size += 3; + } + else { // else space + if (char_i==0 || word[char_i-1]==' ') size+=7; + else size+=4; // if not first letter, already 3 from the last char + } + } + if (word[char_i-1]!=' ') size -= 3; // remove last space between elements (but not if space) + + res = new bool[size](); + + // second loop to fill the result + res_counter = 0; + for (char_i=0; word[char_i]!='\0'; char_i++) { + if (word[char_i]!=' ') { + morse_i = find(word[char_i]); + if (morse_i==37) continue; // if not found + + res_counter += addChar(morse_i, res, res_counter); // if not space + res_counter += 3; // add space between elements + } + else { // else space + if (char_i==0 || word[char_i-1]==' ') res_counter+=3; // if not char last time + res_counter += 4; + } + + } + + data->length = size; + data->data = res; + return data; +} + +void MorseEncoder::destroy(MorseEncoder_data* data) { + delete[] data->data; + delete data; +}