Diff: main.cpp

Revision:

0:8bfa74e1293b

diff -r 000000000000 -r 8bfa74e1293b main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sun Sep 21 22:13:27 2014 +0000
@@ -0,0 +1,134 @@
+#include "mbed.h"
+Serial pc(USBTX, USBRX); // tx, rx
+ 
+DigitalIn switch1(D13); // input switch
+DigitalOut led(D12); // light on.
+
+AnalogIn p1(A0);
+AnalogIn p2(A1);
+AnalogIn p3(A2);
+AnalogIn p4(A3);
+AnalogIn p5(A4);
+
+int sw1 = 0; // input variable
+
+int p1s=0; // individual input with switches
+int p2s=0;
+int p3s=0;
+int p4s=0;
+int p5s=0;
+
+float ps[] = {0, 0, 0, 0, 0};
+int psl[] = {0,0,0,0,0};
+
+int binary = 0; // binary input
+int ascii_c = 0; // capital
+int ascii_l = 0; // lower letter
+bool CAPS =0;// Caps Lock history variable.
+
+bool lastButton = 0;
+bool currentButton = 0; 
+bool current =0;
+
+bool debounce(bool last) // function for debounce
+{
+    sw1 = switch1.read(); // reads current switch status
+    current = sw1;
+    if (last != current)
+    {
+        wait(0.01); //eliminating bouncing with delayx
+        current = sw1;    
+    }
+    return current;        
+}
+
+int encode(int reading)
+{
+    ps[0] = p1.read();
+    ps[1] = p2.read();
+    ps[2] = p3.read();
+    ps[3] = p4.read();
+    ps[4] = p5.read();
+    for(int i =0;i<5;i++)
+    {
+    if(ps[i]>0.005)
+    {
+        psl[i] =1;
+    }
+    else 
+    {
+        psl[i] =0;
+    }
+    }
+    binary = psl[4]*16 + psl[3]*8 + psl[2]*4+psl[1]*2+psl[0]*1;
+    return binary;
+    }
+
+int main(){
+ 
+    while(1)
+    {
+    led =1;  // led on!
+        
+    currentButton = debounce(lastButton);
+    if (lastButton ==0 && currentButton ==1)
+    {
+    encode(binary);
+    if(binary<=25)// 0-25 : A-Z.
+    {
+    switch(CAPS)
+    {
+    case 0 : // Capital
+    ascii_c = binary + 65; 
+    pc.printf("%c",ascii_c);
+    break ;
+    
+    case 1 : //lower case    
+    ascii_c = binary +97;
+    pc.printf("%c",ascii_c);
+    break;
+    
+    }
+    }
+    //else if for CAPS
+    else
+    {
+        switch(binary)
+        {
+            case 26 :
+            ascii_c = binary + 20; // prints out '.' 
+            pc.printf("%c",ascii_c);   
+            break;
+            
+            case 27 :
+            ascii_c = binary + 36; // prints out '?' 
+            pc.printf("%c",ascii_c);   
+            break;
+            
+            case 28 :
+            ascii_c = binary + 4; // prints out 'space' 
+            pc.printf("%c",ascii_c);   
+            break;
+            
+            case 29 :
+            ascii_c = binary -21; // backspace
+            pc.printf("%c",ascii_c);   
+            break;
+            
+            case 30 :
+            ascii_c = binary - 17; // prints out 'enter' 
+            pc.printf("\n%c",ascii_c);   
+            break;
+            
+            case 31 : //CAPS Lock 
+            CAPS =! CAPS;
+            break;
+    
+            }
+    }
+    
+    }    
+    lastButton = currentButton;
+
+    }
+}