Diff: main.cpp

Revision:

1:780300dcee8d

Parent:

0:0cbd2a7185e7

Child:

2:c82fdcdbcab2

--- a/main.cpp	Mon Aug 16 16:47:23 2021 +0000
+++ b/main.cpp	Sat Aug 21 09:14:59 2021 +0000
@@ -1,47 +1,59 @@
-#include "mbed.h"
+ // My first program did not have an interrupt and as a result sometime it would
+ // display the button twice. this was resolved by the use on an interrupt.
+ 
+ #include "mbed.h"
+Serial pc (USBTX, USBRX);
 
-InterruptIn up (p15);
-InterruptIn down (p12);
-InterruptIn left (p13);
-InterruptIn right (p16);
-InterruptIn center (p14);
+InterruptIn center(p14);
+InterruptIn left(p13);
+InterruptIn right(p16);
+InterruptIn up(p15);
+InterruptIn down(p12);
 
-void Up (){
-    
-    printf("Up\r\n");
-    
-    }
-    
-void Down (){
-    
-    printf("Down\r\n");
-    
+void center_released() { wait (0.25);
+}
+void center_pressed() {
+    pc.printf("center\n\r");
+}
+void left_released() { wait (0.25);
+}   
+void left_pressed() {
+    pc.printf("left\n\r");
+}
+void right_released() { wait (0.25);
+}
+void right_pressed() {
+    pc.printf("right\n\r");
+}
+void up_released() { wait (0.25);
+}
+void up_pressed() {
+    pc.printf("up\n\r");
+}
+void down_released() { wait (0.25);
+}
+void down_pressed() {
+    pc.printf("down\n\r");
+}
+int main() {
+ 
+    // Both rise and fall edges generate an interrupt
+    center.fall(&center_released);
+    center.rise(&center_pressed);
+    left.fall(&left_released);
+    left.rise(&left_pressed);
+    right.fall(&right_released);
+    right.rise(&right_pressed);
+    up.fall(&up_released);
+    up.rise(&up_pressed);
+    down.fall(&down_released);
+    down.rise(&down_pressed);
+   
+    left.mode(PullDown);
+    right.mode(PullDown);
+    up.mode(PullDown);
+    down.mode(PullDown);
+   
+    while (1) {     
     }
-    
-void Left (){
-    
-    printf("Left\r\n");
-    
-    }
-    
-void Right (){
-    
-    printf("Right\r\n");
-    
-    }
-    
-void Center (){
-    
-    printf("Center\r\n");
-    
-    }
-
-int main() {
-    
-    up.rise (&Up);
-    down.rise (&Down);
-    left.rise (&Left);
-    right.rise (&Right);
-    center.rise (&Center);
-    }
-
+}
\ No newline at end of file