Rtos API example

Revision:
0:9fca2b23d0ba
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-os/TESTS/mbed_drivers/rtc/main.cpp	Sat Feb 23 12:13:36 2019 +0000
@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 2013-2016, ARM Limited, All Rights Reserved
+ * 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"
+#include "greentea-client/test_env.h"
+#include "unity/unity.h"
+#include "utest/utest.h"
+
+using namespace utest::v1;
+
+#define CUSTOM_TIME  1256729737
+
+void test_case_rtc_strftime() {
+    greentea_send_kv("timestamp", CUSTOM_TIME);
+
+    char buffer[32] = {0};
+    char kv_buff[64] = {0};
+    set_time(CUSTOM_TIME);  // Set RTC time to Wed, 28 Oct 2009 11:35:37
+
+    for (int i=0; i<10; ++i) {
+        time_t seconds = time(NULL);
+        sprintf(kv_buff, "[%ld] ", seconds);
+        strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S %p", localtime(&seconds));
+        strcat(kv_buff, buffer);
+        greentea_send_kv("rtc", kv_buff);
+        wait(1);
+    }
+}
+
+Case cases[] = {
+    Case("RTC strftime", test_case_rtc_strftime),
+};
+
+utest::v1::status_t greentea_test_setup(const size_t number_of_cases) {
+    GREENTEA_SETUP(20, "rtc_auto");
+    return greentea_test_setup_handler(number_of_cases);
+}
+
+Specification specification(greentea_test_setup, cases, greentea_test_teardown_handler);
+
+int main() {
+    Harness::run(specification);
+}