Diff: main.cpp

Revision:

0:147fce697a5d

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Feb 09 18:04:24 2021 +0000
@@ -0,0 +1,95 @@
+#include "mbed.h"
+
+BusOut LED_Disp(p7,p11,p9,p8,p5,p6,p10,p12);
+
+InterruptIn button_up(p14);             //assign interrupt to 14 and 15
+InterruptIn button_down(p17);
+
+int counter1;                 //global counter value
+
+void Increment_up(void);        //ISR to be assigned to button_up interrupt
+void Increment_down(void);      
+void DisplayNumber(int);        //function to display number on seven segment
+
+int main()
+{
+    button_up.rise(&Increment_up);     //attach adress of ISR to interrupt
+    button_down.rise(&Increment_down);
+    
+    while(1)
+    {
+        wait(0.2);
+    }
+}
+
+// Interrupt function to increment counter
+void Increment_up(void)
+{
+    counter1++;    //increment counter
+    
+    if(counter1 <0)   // check for min value
+        counter1 = 0;
+        
+    if(counter1 >9)    //check for max value
+        counter1 = 9;
+        
+    DisplayNumber(counter1);        //display counter1 number on seven segment
+    wait(0.3);                         //debounce timer
+    
+}
+
+void Increment_down(void)
+{
+    counter1--;
+    if(counter1 <0)   
+        counter1 = 0;
+        
+    if(counter1 >9)    
+        counter1 = 9;
+        
+    DisplayNumber(counter1);        
+    wait(0.3); 
+}
+
+//funtion to display counter1 on seven segment
+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; 
+    }
+}
+         
+                        
+    
+    
+