Diff: main.cpp

Revision:

0:2f4ee2a22324

Child:

1:f650db6c33e4

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Fri Feb 17 11:13:02 2017 +0000
@@ -0,0 +1,44 @@
+/* ELEC1620 Application Board Example
+
+Buttons
+
+(c) Dr Craig A. Evans, University of Leeds, Feb 2017
+
+*/
+
+#include "mbed.h"
+
+DigitalIn button_A(p29);
+DigitalIn button_B(p28);
+DigitalIn button_C(p27);
+DigitalIn button_D(p26);
+
+int main() {
+    
+    while(1) {
+        
+        // read each of the buttons and store in variable
+        int button_A_value = button_A.read();
+        // int button_A_value = button_A;  // this is equivalent
+        int button_B_value = button_B.read();
+        int button_C_value = button_C.read();
+        int button_D_value = button_D.read();
+        
+        // check if pressed (value will be 1 i.e. true) and print message
+        if (button_A_value) {
+            printf("Button A is pressed\n");    
+        }
+        if (button_B_value) {
+            printf("Button B is pressed\n");    
+        }
+        if (button_C_value) {
+            printf("Button C is pressed\n");    
+        }
+        if (button_D_value) {
+            printf("Button D is pressed\n");    
+        }
+        
+        wait(0.5);  // small delay - won't be able to read button during delay
+        
+    }
+}