Diff: main.cpp

Revision:

0:d866ad9b15fb

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sat Feb 20 13:22:01 2021 +0000
@@ -0,0 +1,218 @@
+#include "mbed.h"
+
+BusOut LED_Disp(p7,p11,p9,p8,p5,p6,p10,p12);
+
+
+
+DigitalOut col1 (p26);       // pin 4 on keypad
+DigitalOut col2 (p28);       // pin 2
+DigitalOut col3 (p24);       // pin 6 
+
+DigitalIn row1 (p27);        // pin 3
+DigitalIn row2 (p22);        // pin 8
+DigitalIn row3 (p23);        // pin 7
+DigitalIn row4 (p25);        // pin 5
+
+char keypad(void);           // declare keypad function will return character pressed
+void DisplayNumber(int);     // Declare functio  to display number on seven seg
+
+int main()
+{
+    char kp_val = ' ';       // character that changes when the key is pressed, has initial value
+    
+    LED_Disp = 0xFF;
+    
+    while(1)
+    {
+        kp_val = keypad();
+                             
+        if(kp_val!= ' ')        // poll keypad and check if any value is pressed
+        {
+            if(kp_val=='*') LED_Disp = ~0x63;
+            if(kp_val=='#') LED_Disp = ~0x5C;
+            
+            if(kp_val>='0' && kp_val<='9')
+                DisplayNumber(kp_val-48);       // subtract 48 to change ASCII into number
+                
+            kp_val=' ';                         // reset keypad_char
+        }
+        wait(0.1);
+    }
+}
+
+
+char keypad(void)
+{
+    col1=1;
+    col2=0;
+    col3=0;
+    
+    if(row1==1)
+    {
+        while(row1==1){}
+        
+        col1=0;
+        col2=0;
+        col3=0;
+        return('1');
+    }
+    else if(row2==1)
+    {
+        while (row2==1){}
+        
+        col1=0;
+        col2=0;
+        col3=0;
+        return('4');
+    }
+    else if(row3==1)
+    {
+        while (row3==1){}
+        
+        col1=0;
+        col2=0;
+        col3=0;
+        return('7');
+    }
+    else if(row4==1)
+    {
+        while(row4==1){}
+        
+        col1=0;
+        col2=0;
+        col3=0;
+        return('*');
+    }
+    
+    col1=0;
+    col2=1;
+    col3=0;
+    
+    if(row1==1)
+    {
+        while(row1==1){}
+        
+        col1=0;
+        col2=0;
+        col3=0;
+        return('2');
+    }
+    else if(row2==1)
+    {
+        while (row2==1){}
+        
+        col1=0;
+        col2=0;
+        col3=0;
+        return('5');
+    }
+    else if(row3==1)
+    {
+        while (row3==1){}
+        
+        col1=0;
+        col2=0;
+        col3=0;
+        return('8');
+    }
+    else if(row4==1)
+    {
+        while(row4==1){}
+        
+        col1=0;
+        col2=0;
+        col3=0;
+        return('0');
+    }
+    
+    col1=0;
+    col2=0;
+    col3=1;
+    
+    if(row1==1)
+    {
+        while(row1==1){}
+        
+        col1=0;
+        col2=0;
+        col3=0;
+        return('3');
+    }
+    else if(row2==1)
+    {
+        while (row2==1){}
+        
+        col1=0;
+        col2=0;
+        col3=0;
+        return('6');
+    }
+    else if(row3==1)
+    {
+        while (row3==1){}
+        
+        col1=0;
+        col2=0;
+        col3=0;
+        return('9');
+    }
+    else if (row4==1)
+    {
+        while(row4==1){}
+        
+        col1=0;
+        col2=0;
+        col3=0;
+        return('#');
+    }
+    
+    col1=0;
+    col2=0;
+    col3=0;
+    
+    return(' ');
+}
+
+void DisplayNumber(int num)
+{
+     switch(num)
+     {
+        case 0:
+            LED_Disp = ~0x3F;
+            break;
+        case 1:
+            LED_Disp = ~0x06;
+            break;
+        case 2:
+            LED_Disp = ~0x5B;
+            break;
+        case 3:
+            LED_Disp = ~0x4F;
+            break;
+        case 4:
+            LED_Disp = ~0x66;
+            break;
+        case 5:
+            LED_Disp = ~0x6D;
+            break;
+        case 6:
+            LED_Disp = ~0x7D;
+            break; 
+        case 7:
+            LED_Disp = ~0x07;
+            break;
+        case 8:
+            LED_Disp = ~0x7F;
+            break;
+        case 9:
+            LED_Disp = ~0x67;
+            break; 
+        case 10: //#
+            LED_Disp = ~0x5c;
+            break;
+        case 11:   //*
+            LED_Disp = ~0x63;
+            break;
+    }
+}
+