Arduino Morse Library file

Morse.cpp

//
// Arduino Morse Library
//
// Put this file with Morse.h inside a folder "Morse" in your "libraries" folder within your sketchbook folder.
// /your_sketch_folder/libraries/Morse
// Then restart the arduino software.
//
// Origonally written by Erik Linder SM0RVV and Mark VandeWettering K6HX
// Contact: sm0rvv at google mail
// Updated by Dayne Waterlow DWHACKS to fix a few table errors
// daynewaterlow.co,
//
// Released 2011 under GPLv3
//
// Version 0.2.1
//
// Usage:
//         Morse <handle>(<outputpin>, <speed>);
//         <handle>.sendmsg (*str);
//         <handle>.send (*char);

#include "Arduino.h"
#include "Morse.h"

  byte _speed;	// Speed in WPM
  byte _pin;	// Pin to beep or toggle
  byte _beep;	// 1 == beep to speaker, 0 == toggle pin high and low
  int _dashlen;	// Length of dash
  int _dotlen;	// Length of dot
  byte _morsetab[] = {	// Those with value 1 has no morsecode
    107, //ASCII 33 !
    82,  //ASCII 34 "
    1,   //ASCII 35 #
    200, //ASCII 36 $ //was 137 ..._.._
    1,   //ASCII 37 %
    40,  //ASCII 38 &
    94,  //ASCII 39 '
    109, //ASCII 40 (
    109, //ASCII 41 )
    1,   //ASCII 42 *
    42,  //ASCII 43 +
    115, //ASCII 44 ,
    97,  //ASCII 45 -
    106,  //ASCII 46 . //was 85 ._._._
    50,  //ASCII 47 /
    63,  //ASCII 48 0
    62,  //ASCII 49 1
    60,  //ASCII 50 2
    56,  //ASCII 51 3
    48,  //ASCII 52 4
    32,  //ASCII 53 5
    33,  //ASCII 54 6
    35,  //ASCII 55 7
    39,  //ASCII 56 8
    47,  //ASCII 57 9
    120, //ASCII 58 :
    53,  //ASCII 59 ;
    1,   //ASCII 60 <
    49,  //ASCII 61 =
    1,   //ASCII 62 >
    76,  //ASCII 63 ?
    69,  //ASCII 64 @
    6,   //ASCII 65 A
    17,  //ASCII 66 B
    21,  //ASCII 67 C
    9,   //ASCII 68 D
    2,   //ASCII 69 E
    20,  //ASCII 70 F
    11,  //ASCII 71 G
    16,  //ASCII 72 H
    4,   //ASCII 73 I
    30,  //ASCII 74 J
    13,  //ASCII 75 K
    18,  //ASCII 76 L
    7,   //ASCII 77 M
    5,   //ASCII 78 N
    15,  //ASCII 79 O
    22,  //ASCII 80 P
    27,  //ASCII 81 Q
    10,  //ASCII 82 R
    8,   //ASCII 83 S
    3,   //ASCII 84 T
    12,  //ASCII 85 U
    24,  //ASCII 86 V
    14,  //ASCII 87 W
    25,  //ASCII 88 X
    29,  //ASCII 89 Y
    19,  //ASCII 90 Z
    1,   //ASCII 91 [
    1,   //ASCII 92 \
    1,   //ASCII 93 ]
    1,   //ASCII 94 ^
    77,  //ASCII 95 _
    94,  //ASCII 96 `
    6,   //ASCII 97 a
    17,  //ASCII 98 b
    21,  //ASCII 99 c
    9,   //ASCII 100 d
    2,   //ASCII 101 e
    20,  //ASCII 102 f
    11,  //ASCII 103 g
    16,  //ASCII 104 h
    4,   //ASCII 105 i
    30,  //ASCII 106 j
    13,  //ASCII 107 k
    18,  //ASCII 108 l
    7,   //ASCII 109 m
    5,   //ASCII 110 n
    15,  //ASCII 111 o
    22,  //ASCII 112 p
    27,  //ASCII 113 q
    10,  //ASCII 114 r
    8,   //ASCII 115 s
    3,   //ASCII 116 t
    12,  //ASCII 117 u
    24,  //ASCII 118 v
    14,  //ASCII 119 w
    25,  //ASCII 120 x
    29,  //ASCII 121 y
    19   //ASCII 122 z
    };

Morse::Morse(byte pin, byte speed, byte beep)
{
  // Save values for later use
  _pin = pin;
  _speed = speed;
  _beep = beep;

  // Calculate the length of dash and dot
  _dotlen = (1200/_speed);
  _dashlen =  (3*_dotlen);

  // Set the pin to output mode
  pinMode(_pin, OUTPUT);
}

void Morse::dash()
{
  digitalWrite(_pin, HIGH);
  delay(_dashlen);
  digitalWrite(_pin, LOW);
  delay(_dotlen);
}

void Morse::dit()
{
  digitalWrite(_pin, HIGH);
  delay(_dotlen);
  digitalWrite(_pin, LOW);
  delay(_dotlen);
}

void Morse::bdash()
{
  analogWrite(_pin, 128);
  delay(_dashlen);
  analogWrite(_pin, 0);
  delay(_dotlen);
}

void Morse::bdit()
{
  analogWrite(_pin, 128);
  delay(_dotlen);
  analogWrite(_pin, 0);
  delay(_dotlen);
}

void Morse::send(char c)
{
  byte _i;
  byte _p;

  // Send space
  if (c == ' ') {
    delay(7*_dotlen) ;
    return ;
  }

  // Do a table lookup to get morse data
  else {
    _i = ((byte) c) - 33;
    _p = _morsetab[_i];
  }

  // Main algoritm for each morse sign
  while (_p != 1) {
    if (_p & 1)
      switch (_beep) {
	case 0:
	  dash();
	  break;
        case 1:
          bdash();
          break;
        default:
          break;
      }
    else
      switch (_beep) {
	case 0:
	  dit();
	  break;
        case 1:
          bdit();
          break;
        default:
          break;
      }
    _p = _p / 2;
  
}  // Letterspace
  delay(2*_dotlen);
}

void Morse::sendmsg(char *str)
{
  while (*str) {
    send(*str++);
  }
}