Diff: main.cpp

Revision:

0:87df0368c584

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu Sep 24 12:28:41 2015 +0000
@@ -0,0 +1,71 @@
+#include "mbed.h"
+
+
+#define kRED    (1 << 2)    //4
+#define kYELLOW (1 << 1)    //2
+#define kGREEN  (1 << 0)    //1
+
+//Global objects
+BusOut binaryOutput(D5, D6, D7);    //Outputs as an integer
+
+DigitalIn SW1(D3);
+DigitalIn SW2(D4);
+
+AnalogIn AIN(A0);
+float fVin = 0.0;
+
+//Main function
+int main() {
+    
+    //This represents which state we are in
+    //RED or GREEN
+    int state = 0;
+    
+    while(1) {
+        
+        //Read ADC
+        fVin = AIN;
+        
+        //Write to terminal
+        printf("Analog input = %6.4f\n", fVin);
+        
+        //Now the "state machine" - next state logic
+        switch (state) {
+            //The RED state
+            case 0:
+                //Condition to switch state
+                if (fVin > 0.6f) {
+                    state = 1;
+                }
+                break;
+                
+            //The GREEN state
+            case 1:
+                
+                //Condition to switch state
+                if (fVin < 0.4f) {
+                    state = 0;
+                }
+                break;
+                
+            default:
+                state = 0;
+        }
+        
+        //Output logic
+        switch (state) {
+        case 0:
+            binaryOutput = kGREEN;
+            break;
+        case 1:
+            binaryOutput = kRED;
+            break;
+        default:
+            binaryOutput = 0;        
+        }
+        
+        //Wait
+        wait(0.1);
+        
+    } //end while(1)
+} //end main
\ No newline at end of file