建立工程，成功创建两个虚拟串口

source/OpenAMP/libmetal/lib/time.h

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+/*
+ * Copyright (c) 2016, Xilinx Inc. and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+/*
+ * @file	time.h
+ * @brief	Time primitives for libmetal.
+ */
+
+#ifndef __METAL_TIME__H__
+#define __METAL_TIME__H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** \defgroup time TIME Interfaces
+ *  @{ */
+
+#include <stdint.h>
+#include <metal/sys.h>
+
+/**
+ * @brief      get timestamp
+ *             This function returns the timestampe as unsigned long long
+ *             value.
+ *
+ * @return     timestamp
+ */
+unsigned long long metal_get_timestamp(void);
+
+/** @} */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __METAL_TIME__H__ */
+