Create an Mbed program that - Outputs a string every time the button is pressed - Blinks LED1 if the button is pressed twice within two seconds - Use time_t seconds = time(NULL) to get current time

Revision:
0:9758d6dc0132
Child:
1:916c0b2b9f1c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu Nov 29 17:05:46 2018 +0000
@@ -0,0 +1,47 @@
+#include "mbed.h"
+
+DigitalOut led1(LED1);
+InterruptIn button(USER_BUTTON);
+EventQueue queue(32 * EVENTS_EVENT_SIZE);
+Thread t;
+time_t pressed_seconds = time(NULL);
+
+void blink_led(){
+    led1 = !led1;
+    wait(0.5);
+    led1 = !led1;
+    wait(0.5);
+    led1 = !led1;
+    wait(0.5);
+    led1 = !led1;
+}
+void rise_handler_thread_context(void) {
+//    printf("rise_handler_thread_context in context %p\r\n", Thread::gettid());
+    if(pressed_seconds - time(NULL) > 2){
+        pressed_seconds = time(NULL);
+    } else {
+        blink_led();
+        pressed_seconds = time(NULL);
+    }
+}
+
+void rise_handler_iterrupt_context(void) {
+    // Execute the time critical part first
+    // The rest can execute later in user context (and can contain code that's not interrupt safe)
+    // We use the 'queue.call' function to add an event (the call to 'rise_handler_user_context') to the queue
+    queue.call(rise_handler_thread_context);
+}
+
+void fall_handler(void) {
+    printf("I am a string\n");  
+}
+
+int main() {
+    // Start the event queue
+    t.start(callback(&queue, &EventQueue::dispatch_forever));
+    printf("Starting in context %p\r\n", Thread::gettid());
+    // The 'rise' handler will execute in IRQ context
+    button.rise(rise_handler_iterrupt_context);
+    // The 'fall' handler will execute in the context of thread 't'
+    button.fall(queue.event(fall_handler));
+}