Diff: main.cpp

Revision:

0:277b4be8e03c

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Mar 05 18:05:59 2014 +0000
@@ -0,0 +1,251 @@
+/**********************
+Jae Kyung Han
+ECE 4180 Lab 4
+Morse Code Generator
+**********************/
+
+#include "mbed.h"
+#include "uLCD_4DGL.h"
+#include "Speaker.h"
+#include "PinDetect.h"
+#include "EncodeMorse.cpp"
+#include <string>
+
+// USB Serial
+Serial pc(USBTX, USBRX);
+
+// uLCD
+uLCD_4DGL uLCD(p28,p27,p29); // serial tx, serial rx, reset pin.
+
+// Speaker PWM
+Speaker mySpeaker(p26); // Parameter must be a PwmOut pin.
+
+// Pushbuttons
+PinDetect pb1(p19);
+PinDetect pb2(p20);
+PinDetect pb3(p21);
+PinDetect pb4(p22);
+PinDetect pb5(p23);
+PinDetect pb6(p24);
+
+// mbed LEDs
+DigitalOut led1(LED1);
+DigitalOut led2(LED2);
+DigitalOut led3(LED3);
+DigitalOut led4(LED4);
+
+// Global Variables
+static const char space[] = "000";  // Internationally defined spacing length between Morse code letters is 3. Do not change.
+float SpeakerFreq = 1000;
+float SpeakerVol = 0.01;
+float DotLength = 0.1;          // Duration of a dot.
+float Speed = 1.2/DotLength;    // Words per minute (1 word = 50 dots).
+
+void pb1_hit_callback(void)
+{
+    if(SpeakerFreq < 1960)
+    SpeakerFreq = SpeakerFreq + 50;
+    
+    uLCD.color(DGREY);
+    uLCD.locate(0,2); uLCD.printf("Pitch: ");
+    uLCD.color(WHITE);
+    uLCD.locate(8,2); uLCD.printf("%4.0f Hz",SpeakerFreq);
+}
+void pb2_hit_callback(void)
+{
+    if(SpeakerFreq > 100)
+        SpeakerFreq = SpeakerFreq - 50;
+    else
+        SpeakerFreq = 100;
+    
+    uLCD.color(DGREY);
+    uLCD.locate(0,2); uLCD.printf("Pitch: ");
+    uLCD.color(WHITE);
+    uLCD.locate(8,2); uLCD.printf("%4.0f Hz",SpeakerFreq);
+}
+void pb3_hit_callback(void)
+{
+    if(Speed < 100)
+        Speed = Speed + 1;
+    
+    uLCD.color(DGREY);
+    uLCD.locate(0,4); uLCD.printf("Speed: ");
+    uLCD.color(WHITE);
+    uLCD.locate(10,4); uLCD.printf("%2.0f wpm",Speed);
+}
+void pb4_hit_callback(void)
+{
+    if(Speed > 1)
+        Speed = Speed - 1;
+    else
+        Speed = 1;
+    
+    uLCD.color(DGREY);
+    uLCD.locate(0,4); uLCD.printf("Speed: ");
+    uLCD.color(WHITE);
+    uLCD.locate(10,4); uLCD.printf("%2.0f wpm",Speed);
+}
+void pb5_hit_callback(void)
+{
+    if(SpeakerVol < 0.045)
+        SpeakerVol = SpeakerVol + 0.005;
+    
+    uLCD.color(DGREY);
+    uLCD.locate(0,6); uLCD.printf("Volume: ");
+    uLCD.color(WHITE);
+    uLCD.locate(10,6); uLCD.printf("%2.0f",SpeakerVol*1000);
+}
+void pb6_hit_callback(void)
+{
+    if(SpeakerVol > 0.005)
+        SpeakerVol = SpeakerVol - 0.005;
+    else
+        SpeakerVol = 0;
+    
+    uLCD.color(DGREY);
+    uLCD.locate(0,6); uLCD.printf("Volume: ");
+    uLCD.color(WHITE);
+    uLCD.locate(10,6); uLCD.printf("%2.0f",SpeakerVol*1000);
+}
+
+void UpdateLCD()
+{
+    uLCD.cls();
+    uLCD.color(DGREY);
+    uLCD.locate(4,0); uLCD.printf("Morse Code");
+    uLCD.locate(0,2); uLCD.printf("Pitch: ");
+    uLCD.locate(0,4); uLCD.printf("Speed: ");
+    uLCD.locate(0,6); uLCD.printf("Volume: ");
+    uLCD.locate(0,8); uLCD.printf("Input: ");
+    uLCD.color(WHITE);
+    uLCD.locate(8,2); uLCD.printf("%4.0f Hz",SpeakerFreq);
+    uLCD.locate(10,4); uLCD.printf("%2.0f wpm",Speed);
+    uLCD.locate(10,6); uLCD.printf("%2.0f",SpeakerVol*1000);
+}
+
+int main() {
+// INITIAL SETTINGS AND DISPLAY
+    // Set mode so that no external PullUp resistor is needed:
+    pb1.mode(PullUp);
+    pb2.mode(PullUp);
+    pb3.mode(PullUp);
+    pb4.mode(PullUp);
+    pb5.mode(PullUp);
+    pb6.mode(PullUp);
+    wait(0.01); // Wait for mode to take effect.
+    
+    // Set up interrupt callback functions for a pb hit:
+    pb1.attach_deasserted(&pb1_hit_callback);
+    pb2.attach_deasserted(&pb2_hit_callback);
+    pb3.attach_deasserted(&pb3_hit_callback);
+    pb4.attach_deasserted(&pb4_hit_callback);
+    pb5.attach_deasserted(&pb5_hit_callback);
+    pb6.attach_deasserted(&pb6_hit_callback);
+    
+    // Sample pushbutton inputs using interrupts:
+    pb1.setSampleFrequency();
+    pb2.setSampleFrequency();
+    pb3.setSampleFrequency();
+    pb4.setSampleFrequency();
+    pb5.setSampleFrequency();
+    pb6.setSampleFrequency();
+    
+    // Set up LCD:
+    uLCD.baudrate(3000000); // Set LCD to max baudrate.
+    UpdateLCD();
+    
+    while(1) {
+// INPUT TEXT USING SERIAL USB PORT
+        pc.printf("\n========== MORSE CODE GENERATOR ==========\n");
+        pc.printf("Type a sentence below (end with [.] or [?]):\n");
+        
+        char myChar = NULL;             // Initialize to save each character from port.
+        char myString[100] = {NULL};    // Initialize to store concatenated characters. Set to 100 character limit for a sentence.
+    
+        while( !(myChar=='.' || myChar=='?') )
+        {
+            myChar = pc.getc(); // Read character from port.
+            pc.putc( myChar );  // Echo character to port.
+            sprintf(myString,"%s%c",myString,myChar); // Concatenate myString and myChar into myString.
+        }
+        
+// DISPLAY TO LCD
+        UpdateLCD();
+        uLCD.color(GREEN);
+        uLCD.locate(8,8); uLCD.printf("%s",myString);   // Display final input.
+        
+// TRANSLATE TEXT TO MORSE CODE
+        pc.printf("\n\nTranslation:\n");
+        int i = 0;                  // Initialize iterator.
+        static char* X;             // Initialize output variable for Morse function.
+        char myCode[1000] = {NULL}; // Initialize to store Morse code. This can get pretty big - set around 10 times the string length (Optimize this).
+        char X2[50] = {NULL};       // Initialize to save X with or without spacing (leaving as X causes type-casting conflict).
+        int SpaceDetect = 0;        // True if character is a space.
+        
+        while(myString[i] != '\0')
+        {
+            myChar = myString[i];               // Get each character.
+            X = EncodeMorse(myChar);            // Translate it into Morse code.
+    
+            // Account for the spacing between letters in Morse code.
+            if(i > 0)   // Is not the first letter in the code...
+            {
+                if(myChar != 32)    // Is not [Space]...
+                {
+                    if(SpaceDetect == 0)    // Is not a letter after [Space].
+                    {
+                        sprintf(X2,"%s%s",space,X); // Add spacing before letter.
+                    }
+                    else    // Is a letter after [Space].
+                    {
+                        sprintf(X2,"%s%s","",X);    // Don't add spacing before letter.
+                        SpaceDetect = 0;            // Reset "space detected" flag
+                    }
+                }
+                else    // Is [Space].
+                {
+                    sprintf(X2,"%s%s","",X);    // Don't add spacing.
+                    SpaceDetect = 1;            // Enable to avoid adding spacing to the following letter.
+                }
+            }
+            else    // Is the first letter in the code.
+            {
+                sprintf(X2,"%s%s","",X);        // Don't add spacing before the very first letter.
+            }
+            sprintf(myCode,"%s%s",myCode,X2);   // Concatenate into complete code.
+            i++;                                // Get next character index.
+            // DEBUGGING
+            pc.printf("%c: %s -> %s\n",myChar,X,X2);
+        }
+        pc.printf("myCode = %s\n",myCode);      // Display code on PC. 
+    
+// PLAY MORSE CODE TO SPEAKER AND LED
+        pc.printf("\nMorse code playback:\n");
+        int j = 0;                  // Initialize iterator.
+        int myInt;                  // Initialize for character to integer conversion.
+        myChar = myCode[j];         // Initialize first character.
+        while( myChar != NULL)
+        {
+            myInt = myChar - '0';    // Character to integer for numericals.
+            if( myInt )
+            {
+                if(myInt==1) pc.printf(".");    // Display 1s as dots.
+                if(myInt==3) pc.printf("-");    // Display 3s as dashes.
+                led1 = 1;
+                mySpeaker.PlayNote(SpeakerFreq,(myInt/Speed),SpeakerVol);
+            }
+            else
+            {
+                pc.printf(" ");     // Display 0s as spaces.
+                led1 = 0;
+                wait(1/Speed);
+            }
+            myChar = myCode[++j];   // Increment to next character.
+        }
+        // DEBUGGING
+        pc.printf("\nmyString character length: %d\n",i);
+        pc.printf("myCode character length: %d\n",j);
+        led1 = 0;   // Turn LED off at the end because otherwise it stays on.
+        pc.printf("[END]\n");
+    } //infinite while loop
+}//main
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