Emery Premeaux
A collection of examples organized from basics to advanced.
Dependencies: mbed SDFileSystem
Mbed online compiler has no facility to easily manage a lot of programs or organized them in to related folders. This makes creating an examples and sample pack difficult.
This repository contains a single main.cpp file (which does very little), and a BuildOptions.h file. Simply uncomment the example you would like to compile from the build options. Each example is wrapped in a compiler directive.
If the directive does not include a description comment, it likely does not exist yet. If you would like to contribute to the Examples project, please contact me or fork and issue a pull request.
Diff: 02_Digital/Debounce.cpp
- Revision:
- 1:9a043ee174de
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/02_Digital/Debounce.cpp Fri Jul 05 04:52:18 2019 +0000
@@ -0,0 +1,42 @@
+#ifdef COMPILE_Debounce
+
+DigitalOut led1(LED1);
+
+InterruptIn button1(USER_BUTTON);
+volatile bool button1_pressed = false; // Used in the main loop
+volatile bool button1_enabled = true; // Used for debouncing
+Timeout button1_timeout; // Used for debouncing
+
+// Enables button when bouncing is over
+void button1_enabled_cb(void)
+{
+ button1_enabled = true;
+}
+
+// ISR handling button pressed event
+void button1_onpressed_cb(void)
+{
+ if (button1_enabled) { // Disabled while the button is bouncing
+ button1_enabled = false;
+ button1_pressed = true; // To be read by the main loop
+ button1_timeout.attach(callback(button1_enabled_cb), 0.3); // Debounce time 300 ms
+ }
+}
+
+int main()
+{
+ //button1.mode(PullUp); // Activate pull-up
+ button1.fall(callback(button1_onpressed_cb)); // Attach ISR to handle button press event
+
+ int idx = 0; // Just for printf below
+
+ while(1) {
+ if (button1_pressed) { // Set when button is pressed
+ button1_pressed = false;
+ printf("Button pressed %d\n", idx++);
+ led1 = !led1;
+ }
+ }
+}
+
+#endif
\ No newline at end of file