Merge pull request #74 from maciejbocianski/move_sleep_examples

add Sleep examples

Author: Qinghao Shi

APIs_Platform/DeepSleepLock_Example_1/README.md

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+# DeepSleepLock example
+
+Example use of the DeepSleepLock class.
+

APIs_Platform/DeepSleepLock_Example_1/main.cpp

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+/*
+ * Copyright (c) 2020 Arm Limited and affiliates.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+#include "mbed.h"
+
+InterruptIn button(BUTTON1);
+DigitalOut led(LED1);
+
+void toggle()
+{
+    led = !led;
+}
+
+int main()
+{
+    button.rise(&toggle);
+    button.fall(&toggle);
+
+    // Lock deep sleep to decrease interrupt latency
+    // at the expense of high power consumption
+    DeepSleepLock lock;
+
+    while (1) {
+        // Wait and let interrupts take care of the rest
+        ThisThread::sleep_for(1000);
+    }
+}

APIs_Platform/SleepManager_Example_1/README.md

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+# Sleep manager example
+
+Example use of the sleep manager API.
+

APIs_Platform/SleepManager_Example_1/main.cpp

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+/*
+ * Copyright (c) 2020 Arm Limited and affiliates.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+#include "mbed.h"
+
+
+int main()
+{
+    // Deep sleep for 1 second
+    printf("Deep sleep allowed: %i\r\n", sleep_manager_can_deep_sleep());
+    ThisThread::sleep_for(1000);
+
+    // Lock deep sleep
+    printf("Locking deep sleep\r\n");
+    sleep_manager_lock_deep_sleep();
+
+    // Sleep for 1 second
+    printf("Deep sleep allowed: %i\r\n", sleep_manager_can_deep_sleep());
+    ThisThread::sleep_for(1000);
+}