ese519 hw2 part 4

Dependencies:   keypad mbed

Files at this revision

API Documentation at this revision

Comitter:
hlekkala
Date:
Tue Feb 24 19:02:54 2015 +0000
Parent:
0:cfa060762ad7
Commit message:
final

Changed in this revision

main.cpp Show annotated file Show diff for this revision Revisions of this file
diff -r cfa060762ad7 -r e004fff01d0d main.cpp
--- a/main.cpp	Tue Feb 17 20:35:43 2015 +0000
+++ b/main.cpp	Tue Feb 24 19:02:54 2015 +0000
@@ -1,72 +1,246 @@
 #include "mbed.h"
 
-PwmOut buzzer(p21);
-PwmOut speaker(p26);
+//Defining the keypad rows as outputs and columns as inputs
+Serial pc(USBTX, USBRX);
+DigitalOut row2(p17);
+DigitalOut row3(p12);
+DigitalOut row4(p15);
+DigitalOut row1(p18);
+
+DigitalIn column1(p16);
+DigitalIn column2(p14);
+DigitalIn column3(p13);
+DigitalIn column4(p12);
 
-Serial pc(USBTX, USBRX); 
-DigitalOut cols[4]= {p20,p19,p18,p17};
-InterruptIn rows[4]={p25,p22,p23,p24};
+DigitalOut buzzer(p22);  
+
+//defining tickers                                                                                                                                                  
+Ticker rowsTick;
+Ticker tick;
+
+//function to flip the buzzer value for generating sounds
+int i = 0;
+
+//function to flip the buzzer value
+void outFreq(){ 
+    buzzer =! buzzer;      
+    }
 
-double HZc[] = { 1209.0,   1336.0, 1477.0, 1633.0}; // Colum
-double HZr[] = {697.0, 770.0, 852.0, 941.0}; //Row
-char Keytable[] = { '1', '2', '3', 'A',
-                     '4', '5', '6', 'B',
-                     '7', '8', '9', 'C',
-                     '*', '0', '#', 'D'
-                   };
- 
-void start(int row){
-    double high = 0, low = 0;
-    if(rows[row].read() == 0) return;
-    for(int i = 0; i < 4; ++i){
-        cols[i].write(0);
-        if(rows[row].read() == 0){
-            high = HZc[i];
-            low = HZr[row];
-            pc.printf("input row %d col %d %c \n", row, i, Keytable[row * 4 + i]);
-            break;
+//defining class for sound
+class Speaker
+{
+public:
+    Speaker(PinName pin) : inpPin(pin) {
+    }
+//function to play the sound for according to the key pressed
+    void Output(float frequency, float sound) {
+        inpPin.period(1.0/frequency);
+        inpPin = sound;
+    }
+ //defining the inpPin as PwmOut so that microcontroller recoginses it
+    PwmOut inpPin;
+};
+
+//iterating over the rows in a cycle  
+void row_press()
+ {
+        if(i < 4)
+        {
+              i++;
         }
-    }
-    buzzer.period(low);
-    speaker.period(high);
-    buzzer = 0.5;
-    speaker = 0.5;
-}    
-
-void stop(){
-    buzzer.period(0);
-    speaker.period(0);
-    buzzer = 0;
-    speaker = 0;
-    for(int i = 0; i < 4; ++i) cols[i] = 1;
+        else
+        {
+         i = 1;
+        } 
 }
 
-
+int main(){ 
 
-void row0Rise(){
-    start(0);
-}
-void row1Rise(){
-    start(1);
-}
-void row2Rise(){
-    start(2);
-}
-void row3Rise(){
-    start(3);
-}
+//initializing all rows to zero
+    Speaker speaker1(p21);
+    row1 = 0;
+    row2 = 0;
+    row3 = 0; 
+    row4 = 0;
+    
+//calling a ticker once every 4ms
+
+    rowsTick.attach_us(&row_press, 4000);      
 
-void rowFall(){
-    stop();
-}
-
-int main() {
-    rows[0].rise(&row0Rise);
-    rows[1].rise(&row1Rise);
-    rows[2].rise(&row2Rise);
-    rows[3].rise(&row3Rise);
-    for(int i = 0; i < 4; ++i) rows[i].fall(&rowFall);
-    while(1) {
-        ;
+    while(1){  
+        //checking each row and creating the sound accordingly
+        // Check for Row 1
+        if(i == 1){
+             row1 = 1;
+             if(column1 == 1){     
+                  
+                speaker1.Output(1209, 0.5); 
+                buzzer = 0;            
+                tick.attach(&outFreq, 0.5/697.0);
+                wait_ms(16);
+                speaker1.Output(0, 0.0);
+                pc.printf("1"); 
+                tick.detach();                                                       
+                }     
+            else if(column2 == 1){
+                speaker1.Output(1336, 0.5); 
+                buzzer = 0;            
+                tick.attach(&outFreq, 0.5/697.0); 
+                wait_ms(16);
+                speaker1.Output(0, 0.0);
+                tick.detach();      
+                pc.printf("2");         
+                }
+            else if(column3 == 1){ 
+                speaker1.Output(1477, 0.5); 
+                buzzer = 0;            
+                tick.attach(&outFreq, 0.5/697.0); 
+                wait_ms(16);
+                speaker1.Output(0, 0.0);
+                tick.detach();        
+                pc.printf("3");       
+                }
+            else if(column4 == 1){
+                pc.printf("A");
+                speaker1.Output(1633, 0.5);  
+                buzzer = 0;            
+                tick.attach(&outFreq, 0.5/697.0); 
+                wait_ms(16);
+                speaker1.Output(0, 0.0);
+                tick.detach();               
+                } 
+                row1 = 0;    
+            }
+        // Check for Row 2
+         if(i == 2){
+             
+             row2 = 1;
+             
+             if(column1 == 1){
+                pc.printf("4"); 
+                speaker1.Output(1209, 0.5);  
+                buzzer = 0;            
+                tick.attach(&outFreq, 0.5/770.0); 
+                wait_ms(16);
+                speaker1.Output(0, 0.0);
+                tick.detach();                         
+                }
+            else if(column2 == 1){
+                pc.printf("5");
+                speaker1.Output(1336, 0.5);   
+                buzzer = 0;            
+                tick.attach(&outFreq, 0.5/770.0); 
+                wait_ms(16);
+                speaker1.Output(0, 0.0);
+                tick.detach();              
+                }
+            else if(column3 == 1){
+                pc.printf("6"); 
+                speaker1.Output(1477, 0.5);  
+                buzzer = 0;            
+                tick.attach(&outFreq, 0.5/770.0); 
+                wait_ms(16);
+                speaker1.Output(0, 0.0);
+                tick.detach();                
+                }
+            else if(column4 == 1){
+                pc.printf("B"); 
+                speaker1.Output(1633, 0.5);      
+                buzzer = 0;            
+                tick.attach(&outFreq, 0.5/770.0); 
+                wait_ms(16);
+                speaker1.Output(0, 0.0);
+                tick.detach();           
+                }    
+                row2 = 0;     
+            }
+        // Check for Row 3   
+        if(i == 3){
+             
+             row3 = 1;
+             
+             if(column1 == 1){
+                pc.printf("7"); 
+                speaker1.Output(1209, 0.5); 
+                buzzer = 0;            
+                tick.attach(&outFreq, 0.5/852.0); 
+                wait_ms(16);
+                speaker1.Output(0, 0.0);
+                tick.detach();                          
+                }
+            else if(column2 == 1){
+                pc.printf("8");
+                speaker1.Output(1336, 0.5); 
+                buzzer = 0;            
+                tick.attach(&outFreq, 0.5/852.0); 
+                wait_ms(16);
+                speaker1.Output(0, 0.0);
+                tick.detach();            
+                }
+            else if(column3 == 1){
+                pc.printf("9"); 
+                speaker1.Output(1477, 0.5); 
+                buzzer = 0;            
+                tick.attach(&outFreq, 0.5/852.0); 
+                wait_ms(16);
+                speaker1.Output(0, 0.0);
+                tick.detach();             
+                }
+            else if(column4 == 1){
+                pc.printf("C");   
+                speaker1.Output(1633, 0.5);  
+                buzzer = 0;            
+                tick.attach(&outFreq, 0.5/852.0); 
+                wait_ms(16);
+                speaker1.Output(0, 0.0);
+                tick.detach();          
+                }   
+                row3 = 0;      
+            }
+        
+        // Check for Row 4
+        if(i == 4){
+             
+             row4 = 1;
+             
+             if(column1 == 1){
+                pc.printf("*"); 
+                speaker1.Output(1209, 0.5); 
+                buzzer = 0;            
+                tick.attach(&outFreq, 0.5/941.0); 
+                wait_ms(16);
+                speaker1.Output(0, 0.0);
+                tick.detach();                          
+                }
+            else if(column2 == 1){
+                pc.printf("0");
+                speaker1.Output(1336, 0.5);  
+                buzzer = 0;            
+                tick.attach(&outFreq, 0.5/941.0); 
+                wait_ms(16);
+                speaker1.Output(0, 0.0);
+                tick.detach();               
+                }
+            else if(column3 == 1){
+                pc.printf("#");
+                speaker1.Output(1477, 0.5);  
+                buzzer = 0;            
+                tick.attach(&outFreq, 0.5/941.0); 
+                wait_ms(16);
+                speaker1.Output(0, 0.0);
+                tick.detach();               
+                }
+            else if(column4 == 1){
+                pc.printf("D");  
+                speaker1.Output(1633, 0.5);
+                buzzer = 0;            
+                tick.attach(&outFreq, 0.5/941.0); 
+                wait_ms(16);
+                speaker1.Output(0, 0.0);
+                tick.detach();               
+                }  
+                row4 = 0;    
+            }  
     }
-}
+    
+}
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