建立工程，成功创建两个虚拟串口

source/OpenAMP/libmetal/test/system/freertos/sleep.c

@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2016, Xilinx Inc. and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <metal/errno.h>
+#include <string.h>
+#include "FreeRTOS.h"
+#include "task.h"
+
+#include "metal-test.h"
+#include <metal/time.h>
+#include <metal/sleep.h>
+#include <metal/log.h>
+#include <metal/sys.h>
+
+static int sleep(void)
+{
+	int rc;
+	unsigned int usec = 3;
+	unsigned long long tstart, tend, tdelayed;
+
+	tstart = metal_get_timestamp();
+	metal_sleep_usec((usec/portTICK_PERIOD_MS));
+	tend = metal_get_timestamp();
+	tdelayed = tend - tstart;
+	if (tdelayed > (usec/portTICK_PERIOD_MS))
+		rc = -1;
+	else
+		rc = 0;
+
+	return rc;
+}
+METAL_ADD_TEST(sleep);