Idle loop

IdleLoop/README.md

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+# IdleLoop example #
+
+Idle Loop usage example for mbed OS
+
+This is an example showing the purpose of Idle Loop thread that is scheduled when no other threads are ready to run. In this example, we have a regular thread that is scheduled to run every
+5 seconds, and meanwhile, since no other thread is scheduled to run, the idle loop runs and toggles the LED.

IdleLoop/main.cpp

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+#include "mbed.h"
+#include "rtos_idle.h"
+
+DigitalOut led(LED2);
+DigitalOut led1(LED1);
+LowPowerTicker watchdogTicker;
+Thread watchdogThread;
+EventQueue watchdogQueue;
+
+
+//if we use Serial as a CLI console . The CLI thread allways get the read lock , if another thread want to print something to serial console, it will be blocked by CLI thread .
+
+void watchdogRefreshHandler() {
+    led = !led;
+    // target-specific feed function
+};
+
+void watchdogRefreshIsr() {
+    watchdogQueue.call(callback(&watchdogRefreshHandler));
+};
+
+void new_idle_loop()
+{
+	led1 = !led1;
+}
+
+int main() {
+	watchdogThread.start(callback(&watchdogQueue, &EventQueue::dispatch_forever));
+    watchdogTicker.attach(callback(&watchdogRefreshIsr), 5);
+    rtos_attach_idle_hook(&new_idle_loop);
+}