NuMaker connection with AWS IoT thru MQTT/HTTPS

Dependencies:   MQTT_ON_AWS

Revision:
29:e890b0fdce53
diff -r 4c196d0b769b -r e890b0fdce53 pre-main/mbed_main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/pre-main/mbed_main.cpp	Tue Oct 29 10:59:34 2019 +0800
@@ -0,0 +1,48 @@
+/* 
+ * Copyright (c) 2019 Nuvoton Technology Corporation
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "mbed.h"
+
+/* Run pre-main tasks via mbed_main()
+ *
+ * In Mbed OS boot sequence, mbed_main(), designed for user application override, is run
+ * before main(). We use it to run the following tasks:
+ *
+ * 1. Simulate provision process for development
+ * 2. Set up event queue for dispatching host command
+ *
+ * WARNING: For mass production, remove this file.
+ */
+
+/* Check weak reference/definition at the link:
+ * http://www.keil.com/support/man/docs/ARMLINK/armlink_pge1362065917715.htm */
+
+extern "C" {
+    MBED_USED void mbed_main(void);
+    MBED_WEAK void provision(void);
+    MBED_WEAK void pump_host_command(void);
+}
+
+void mbed_main(void)
+{
+    provision();
+    /* Spare memory if event queue is unnecessary */
+    if (pump_host_command) {
+        mbed_event_queue()->call_every(2000, pump_host_command);
+    }
+}