Diff: main.cpp

Revision:

0:3151531e9a31

Child:

1:2438293c128c

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Fri Oct 06 21:08:45 2017 +0000
@@ -0,0 +1,33 @@
+/*
+    Project: TW_Ex_9_1
+    File: main.cpp
+    
+    An example similar to T&W example 9.1. Green junction will flash 
+    continuously. Blue junction will toggle in response to depressing the user 
+    button.
+    
+    Created by Dr. C. S. Tritt
+    Last revised: 10/6/17 (v. 1.0)
+*/
+#include "mbed.h"
+
+InterruptIn myButton(USER_BUTTON); // Button is normally high. Goes low w/press.
+
+DigitalOut bluLED(D4); // Bluee and green LED junctions.
+DigitalOut grnLED(D3);
+
+void myISR() { // Simple ISR toggles the red LED junction when called.
+    bluLED = !bluLED; // Toggle blue junction.
+}
+
+int main() {
+    bluLED = 0; // Turn blue & green off at start.
+    grnLED = 0; 
+    
+    myButton.fall(&myISR); // "Register" the ISR routine. Sets vector.
+    
+    while(true) {
+        grnLED = !grnLED; // Toggle green junction.
+        wait(0.5); // Pause half a second.
+    }
+}
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