建立工程，成功创建两个虚拟串口

source/OpenAMP/libmetal/lib/system/freertos/time.c

@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2016, Xilinx Inc. and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+/*
+ * @file	freertos/time.c
+ * @brief	freertos libmetal time handling.
+ */
+
+#include <FreeRTOS.h>
+#include <task.h>
+#include <metal/time.h>
+
+unsigned long long metal_get_timestamp(void)
+{
+	return (unsigned long long)xTaskGetTickCount();
+}
+