Diff: main.cpp

Revision:

110:6360f8487c16

Parent:

109:b061f9830736

Child:

111:2d91fe50a8cc

--- a/main.cpp	Fri Oct 01 02:45:38 2021 +0000
+++ b/main.cpp	Tue Oct 05 12:52:54 2021 +0000
@@ -1,13 +1,11 @@
 /*
-Project: 21_Button-v5
+Project: 21_ButtonImproved_v5
 File: main.cpp
 
-Toogles LED1 when USER_BUTTON is tapped. Note LED1 is also PA_5 which is
-also D13. Based on built-in mbed example Nucleo_read_button. Holding the button 
-down will result in LED flashing.
+Turns LED1 on when USER_BUTTON is held down. Otherwise LED1 is off.
 
 Modified 12 Aug 2017 by Dr. Sheila Ross
-Last revised 9/30/21 by Dr. C. S. Tritt
+Last revised 10/5/21 by Dr. C. S. Tritt
 */
 
 #include "mbed.h"
@@ -20,10 +18,12 @@
 
 int main()
 {
+    myLed = 0; // Start with LED off (the default)
     while(true) { // Main loop.
-        if (myButton == 0) { // Button is active low.
-            myLed = !myLed; // Toggle LED on/off.
-            ThisThread::sleep_for(100);  // Avoid double-tap, 0.1 seconds.
+        if (!myButton) { // Button is active low.
+            myLed = 1; // Turn LED on.
+            while (!myButton);  // Wait here for button release.
+            myLed = 0; // Turn LED back off.
         }
     }
 }
\ No newline at end of file