Revision 0:0ad54d10593c, committed 2014-09-17

Comitter:

wm

Date:

Wed Sep 17 13:29:39 2014 +0000

Child:

1:bad1b4ca49df

Commit message:

Initial revision of the MorseGenerator library

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/MorseGenerator.cpp	Wed Sep 17 13:29:39 2014 +0000
@@ -0,0 +1,44 @@
+#include "MorseGenerator.h"
+
+
+MorseGenerator::MorseGenerator(callback_type _callback) {
+    generate_morse_map();
+    callback = _callback;
+}
+
+void MorseGenerator::generate_morse_map() {
+    add_mappings("ABCDEFGHIJKLMNOPQRSTUVWXYZ", MORSE_LETTERS);  
+    add_mappings("1234567890", MORSE_NUMBERS);
+}
+
+void MorseGenerator::add_mappings(string morse_chars, const string morse_codes[]) {
+    for (int i=0; i < morse_chars.length(); i++) {
+        morse_map.insert(MapType::value_type(morse_chars[i], morse_codes[i]));
+    }
+}
+
+void MorseGenerator::transmit(string message) {
+    for (int i=0; i < message.length(); i++) {
+        if (strncmp(&message[i], " ", 1) != 0) {
+            transmit(message[i]);                
+        }
+        wait_ms(DIT_MS * 7);
+    }
+}
+
+void MorseGenerator::transmit(char letter) {
+    int d;
+    string code = morse_map[letter];
+
+    for (int i=0; i < code.length(); i++) {
+        if (strncmp(&code[i], ".", 1) == 0) {
+            d = 1;
+        } else {
+            d = 3;
+        }
+        callback(1);
+        wait_ms(DIT_MS * d);
+        callback(0);
+        wait_ms(DIT_MS);
+    }
+}
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/MorseGenerator.h	Wed Sep 17 13:29:39 2014 +0000
@@ -0,0 +1,63 @@
+#include <map>
+#include <string>
+#include "mbed.h"
+
+#define DIT_MS 100
+
+
+using namespace std;
+
+typedef map <char, string> MapType;
+typedef void (*callback_type)(int);
+
+const string MORSE_LETTERS[] = {".-", "-...", "-.-.", "-..", ".", "..-.", "--.", "....", "..", ".---", "-.-", ".-..", "--", "-.", "---", ".--.", "--.-", ".-.", "...", "-", "..-", "...-", ".--", "-..-", "-.--", "--.."};
+const string MORSE_NUMBERS[] = {".----", "..---", "...--", "....-", ".....", "-....", "--...", "---..", "----.", "-----"};
+
+/** MorseGenerator class.
+ *
+ * Example:
+ * @code
+ * #include "mbed.h"
+ * #include "main.h"
+ * #include "morsegenerator.h"
+ *
+ * DigitalOut myled(p18);
+ *
+ * void morse_callback(int val) {
+ *     myled = val;
+ * }
+ * 
+ * int main() {
+ *     MorseGenerator morse = MorseGenerator(morse_callback);
+ * 
+ *     while (1) {
+ *         morse.transmit("CQCQ DE M6SPX");
+ *     }
+ * }
+ * @endcode
+ */
+class MorseGenerator {
+    MapType morse_map;
+    callback_type callback;
+    
+    void generate_morse_map();
+    void add_mappings(string morse_chars, const string morse_codes[]);
+public:
+    /** Create a MorseGenerator that calls a specific callback
+     *
+     * @param callback called when turning on or off.
+     */
+    MorseGenerator(callback_type callback);
+    
+    /** transmit a string
+     *
+     * @param message to transmit.
+     */
+    void transmit(string message);
+    
+    /** transmit a char
+     *
+     * @param char to transmit.
+     */
+    void transmit(char letter);
+};
\ No newline at end of file