Merge remote-tracking branch 'remotes/gitee/master'

27 files changed, 1711 insertions, 12 deletions

diff --git a/examples/file/listdir.c b/examples/file/listdir.c
index 98fbc5ea2c..06c746a642 100644
--- a/examples/file/listdir.c
+++ b/examples/file/listdir.c
@@ -13,7 +13,7 @@
 
 void list_dir(const char* path)
 {
-    char * fullpath;
+    char * fullpath = RT_NULL;
     DIR *dir;
 
     dir = opendir(path);
@@ -57,7 +57,10 @@ void list_dir(const char* path)
         rt_kprintf("open %s directory failed\n", path);
     }
 
-    rt_free(fullpath);
+    if (RT_NULL != fullpath)
+    {
+        rt_free(fullpath);
+    }
 }
 
 #ifdef RT_USING_FINSH
@@ -80,6 +83,6 @@ static void cmd_list_dir(int argc, char *argv[])
     }
     list_dir(filename);
 }
-FINSH_FUNCTION_EXPORT_ALIAS(cmd_list_dir, __cmd_list_dir, list directory);
+MSH_CMD_EXPORT_ALIAS(cmd_list_dir, list_dir, list directory);
 #endif /* FINSH_USING_MSH */
 #endif /* RT_USING_FINSH */
diff --git a/examples/libc/ex3.c b/examples/libc/ex3.c
index 1697e7145b..615ed8f35c 100644
--- a/examples/libc/ex3.c
+++ b/examples/libc/ex3.c
@@ -9,7 +9,7 @@
 /* Multi-thread searching.
    Illustrates: thread cancellation, cleanup handlers. */
 
-#include <errno.h>
+#include <sys/errno.h>
 #include <stdio.h>
 #include <unistd.h>
 #include <stdlib.h>
diff --git a/examples/libc/ex6.c b/examples/libc/ex6.c
index ac6319d74c..ba687aa46f 100644
--- a/examples/libc/ex6.c
+++ b/examples/libc/ex6.c
@@ -6,7 +6,7 @@
  * Change Logs:
  * Date           Author       Notes
  */
-#include <errno.h>
+#include <sys/errno.h>
 #include <stdio.h>
 #include <string.h>
 #include <pthread.h>
diff --git a/examples/libc/ex7.c b/examples/libc/ex7.c
index e885f79c57..d1f05dbdcd 100644
--- a/examples/libc/ex7.c
+++ b/examples/libc/ex7.c
@@ -11,7 +11,7 @@
  * Test case that illustrates a timed wait on a condition variable.
  */
 
-#include <errno.h>
+#include <sys/errno.h>
 #include <stdio.h>
 #include <string.h>
 #include <pthread.h>
diff --git a/examples/libc/file.c b/examples/libc/file.c
index 79cdce3092..878d3a98d7 100644
--- a/examples/libc/file.c
+++ b/examples/libc/file.c
@@ -11,7 +11,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <finsh.h>
-#include <errno.h>
+#include <sys/errno.h>
 #include <sys/fcntl.h>
 #include <sys/stat.h>
 
diff --git a/examples/libc/memory.c b/examples/libc/memory.c
index 063d90cfdc..4a31b69017 100644
--- a/examples/libc/memory.c
+++ b/examples/libc/memory.c
@@ -11,7 +11,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <finsh.h>
-#include <errno.h>
+#include <sys/errno.h>
 
 static int errors = 0;
 static void merror(const char *msg)
diff --git a/examples/rt-link/rtlink_example.c b/examples/rt-link/rtlink_example.c
new file mode 100644
index 0000000000..841e56b17e
--- /dev/null
+++ b/examples/rt-link/rtlink_example.c
@@ -0,0 +1,187 @@
+
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2021-05-15     Sherman      the first version
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <rtthread.h>
+#include <rtlink.h>
+
+#define DBG_ENABLE
+#define DBG_TAG "rtlink_exam"
+#define DBG_LVL DBG_INFO
+#include <rtdbg.h>
+
+#define TEST_CONTEXT    "This message is sent by RT-Link"
+
+enum
+{
+    NONE_TEST = 0,
+    SHORT_FRAME_TEST,
+    LONG_FRAME_TEST
+};
+
+void rt_link_speed_test(void *paremeter);
+static rt_uint8_t speed_test_type = NONE_TEST;
+
+rt_err_t rt_link_receive_example_callback(void *data, rt_size_t length)
+{
+    LOG_I("recv data %d",length);
+    LOG_HEX("example",8,data,length);
+    rt_free(data);
+    return RT_EOK;
+}
+
+void create_thead_to_test_speed(rt_uint8_t mutil_num)
+{
+    rt_uint8_t i = 0;
+
+    LOG_D("Speed test type [%02d], mutil [%02d]", speed_test_type, mutil_num);
+    for(i = 0; i< mutil_num; i++)
+    {
+        rt_thread_t tid;
+        char tid_name[RT_NAME_MAX + 1] = {0};
+
+        rt_snprintf(tid_name, sizeof(tid_name), "lny_s%03d", i + 1);
+        tid = rt_thread_create(tid_name, rt_link_speed_test, RT_NULL, 1024, 20, 10);
+        rt_thread_startup(tid);
+        LOG_I("Speed test thread[%s] startup", tid_name);
+    }
+}
+
+void rt_link_speed_test(void *paremeter)
+{
+    int ret;
+    rt_uint8_t *send_buf, *data;
+    rt_size_t bufflen = 0;
+    rt_size_t sentlen = 0;
+    rt_size_t count = 0;
+    rt_tick_t tick1, tick2;
+    rt_size_t total = 0;
+    rt_uint32_t integer, decimal;
+
+    if(speed_test_type == SHORT_FRAME_TEST)
+    {
+        bufflen = 2044;
+    }
+    else
+    {
+        bufflen = 6132;
+    }
+
+    send_buf = rt_malloc(bufflen);
+    if(send_buf != RT_NULL)
+    {
+        data = send_buf;
+        for(count = 0;count < bufflen; count++)
+        {
+            *data++ = (count % 93 + 33);
+        }
+    }
+    else
+    {
+        rt_kprintf("speed of send buffer malloc failed.");
+        return;
+    }
+
+    tick1 = rt_tick_get();
+    while (speed_test_type)
+    {
+        ret = rt_link_send(RT_LINK_SERVICE_RTLINK, send_buf, bufflen);
+        if(ret > 0)
+        {
+            sentlen += ret;
+        }
+
+        tick2 = rt_tick_get();
+        if (tick2 - tick1 >= RT_TICK_PER_SECOND)//* 10
+        {
+            total = sentlen * RT_TICK_PER_SECOND / 125 / (tick2 - tick1);
+            integer = total/1000;
+            decimal = total%1000;
+            LOG_I("%d.%03d0 Mbps!", integer, decimal);
+            sentlen = 0;
+            tick1 = tick2;
+        }
+    }
+    rt_free(send_buf);
+    LOG_W("speed test end, type %d",speed_test_type);
+}
+
+int rt_link_example_send(int argc, char **argv)
+{
+    char *receive = RT_NULL;
+    rt_size_t length = 0;
+    rt_uint16_t count = 0;
+
+    if(argc == 1)
+    {
+        receive = rt_malloc(sizeof(TEST_CONTEXT));
+        rt_memcpy(receive, TEST_CONTEXT, sizeof(TEST_CONTEXT) - 1);
+        length = rt_link_send(RT_LINK_SERVICE_RTLINK, receive, sizeof(TEST_CONTEXT) - 1);
+        LOG_I("send data length: %d.", length);
+        rt_free(receive);
+    }
+        else if(argc >= 3)
+    {
+        if(strcmp(argv[1], "-l") == 0)
+        {
+            receive = rt_malloc(atoi((const char *)argv[2]));
+            for(count = 0;count < atoi((const char *)argv[2]); count++)
+            {
+                *receive++ = (count % 93 + 33);
+            }
+            length = rt_link_send(RT_LINK_SERVICE_RTLINK, receive - atoi((const char *)argv[2]), atoi((const char *)argv[2]));
+            rt_free(receive - atoi((const char *)argv[2]));
+
+            LOG_I("send data length: %d.", length);
+        }
+        else if(strcmp(argv[1], "-s") == 0)
+        {
+            if(speed_test_type == NONE_TEST)
+            {
+                rt_uint8_t mutil_num = 1;
+                if(argc > 3)
+                {
+                    mutil_num = atoi((const char *)argv[3]);
+                }
+
+                if(strncmp(argv[2], "-s", rt_strlen(argv[2])) == 0)
+                {
+                    speed_test_type = SHORT_FRAME_TEST;
+                }
+                else if(strncmp(argv[2], "-l", rt_strlen(argv[2])) == 0)
+                {
+                    speed_test_type = LONG_FRAME_TEST;
+                }
+                create_thead_to_test_speed(mutil_num);
+            }
+            else
+            {
+                speed_test_type = NONE_TEST;
+                LOG_I("set NONE_TEST");
+            }
+        }
+        else
+        {
+            LOG_E("Invalid parameter.");
+        }
+    }
+    return 0;
+}
+MSH_CMD_EXPORT(rt_link_example_send, rt link layer send test);
+
+int rt_link_example_init(void)
+{
+
+    rt_link_service_attach(RT_LINK_SERVICE_RTLINK, rt_link_receive_example_callback);
+    return RT_EOK;
+}
+MSH_CMD_EXPORT(rt_link_example_init, rt link layer example init);
diff --git a/examples/test/rtc_test.c b/examples/test/rtc_test.c
index 4ed1349de4..79ea8450f9 100644
--- a/examples/test/rtc_test.c
+++ b/examples/test/rtc_test.c
@@ -20,7 +20,7 @@ int rtc_test(void)
 
     rt_kprintf("[RTC Test]RTC Test Start...\n");
     rt_thread_delay(RT_TICK_PER_SECOND);
-    rt_kprintf("[RTC Test]Set RTC 2017-04-01 12:30:46\n\n");
+    rt_kprintf("[RTC Test]Set RTC 2017-04-01 12:30:46\n");
     rt_thread_delay(RT_TICK_PER_SECOND);
 
     ret = set_date(2017, 4, 1);
@@ -45,7 +45,7 @@ int rtc_test(void)
     {
         rt_kprintf("[RTC Test]Read RTC Date and Time: ");
         now = time(RT_NULL);
-        rt_kprintf("%s", ctime(&now));
+        rt_kprintf("%s\n", ctime(&now));
 
         rt_thread_delay(RT_TICK_PER_SECOND);
     }
@@ -56,6 +56,6 @@ int rtc_test(void)
 }
 #ifdef RT_USING_FINSH
 #include <finsh.h>
-FINSH_FUNCTION_EXPORT(rtc_test, rtc drive test. e.g: rtc_test());
-MSH_CMD_EXPORT(rtc_test, rtc drive test. e.g: rtc_test());
+FINSH_FUNCTION_EXPORT(rtc_test, rtc driver test. e.g: rtc_test());
+MSH_CMD_EXPORT(rtc_test, rtc driver test. e.g: rtc_test());
 #endif
diff --git a/examples/utest/README.md b/examples/utest/README.md
new file mode 100644
index 0000000000..bde3bd4b80
--- /dev/null
+++ b/examples/utest/README.md
@@ -0,0 +1,73 @@
+# RT-Thread 测试用例集合
+
+## 简介
+
+为了保证某一部分代码的质量，通常可以通过编写测试用例的方式，验证此代码的功能。为了保证 RT-Thread 相关仓库的代码质量，我们基于 utest 框架搭建了一套简易的自动化测试环境。有兴趣，有精力的小伙伴可以利用这套机制完善自己的代码检查。如果有意愿让社区上更多的小伙伴收益，也可以在提交代码的时候，把对应的测试用例也提交上来。
+
+## 目录结构
+
+| 目录      | 用途                                                         |
+| --------- | ------------------------------------------------------------ |
+| configs   | 配置文件集合（每一个目录代表一种功能集合，如：kernel,net等） |
+| testcases | 测试用例源代码                                               |
+
+## 如何贡献
+
+### 1. 编写测试用例
+
+参考已有的测试用例在 [examples\utest\testcases](./testcases) 目录下添加自己的测试用例。测试用例的编写方法参考文档中心《utest 测试框架》章节。
+
+### 2. 本地测试
+
+1. 在 `bsp\qemu-vexpress-a9` 目录下打开 `menuconfig`，使能对应的测试用例，如下：
+
+```
+RT-Thread Utestcases  --->
+  [*] RT-Thread Utestcases
+        Utest Self Testcase  --->
+          [*] Pass test
+```
+
+2. 保存并退出，输入 scons 编译当前 bsp。
+
+3. 输入 .\qemu.bat 运行当前 bsp，在 msh 环境下执行 utest_run 命令，验证代码运行是否正常。
+
+```
+msh />utest_run
+[I/utest] [==========] [ utest    ] loop 1/1
+[I/utest] [==========] [ utest    ] started
+[I/utest] [----------] [ testcase ] (testcases.utest.pass_tc) started
+[D/utest] [    OK    ] [ unit     ] (test_assert_pass:16) is passed
+[D/utest] [    OK    ] [ unit     ] (test_assert_pass:17) is passed
+[D/utest] [    OK    ] [ unit     ] (test_assert_pass:19) is passed
+[D/utest] [    OK    ] [ unit     ] (test_assert_pass:20) is passed
+[D/utest] [    OK    ] [ unit     ] (test_assert_pass:22) is passed
+[D/utest] [    OK    ] [ unit     ] (test_assert_pass:23) is passed
+[D/utest] [    OK    ] [ unit     ] (test_assert_pass:25) is passed
+[D/utest] [    OK    ] [ unit     ] (test_assert_pass:26) is passed
+[D/utest] [    OK    ] [ unit     ] (test_assert_pass:28) is passed
+[D/utest] [    OK    ] [ unit     ] (test_assert_pass:29) is passed
+[I/utest] [  PASSED  ] [ result   ] testcase (testcases.utest.pass_tc)
+[I/utest] [----------] [ testcase ] (testcases.utest.pass_tc) finished
+[I/utest] [==========] [ utest    ] finished
+```
+
+### 3. 提交
+
+1. 如果是对已有测试集合的完善，需要把添加的测试用例的配置项，以及对应的依赖项添加到对应测试集合的配置文件里，如：[examples\utest\configs\kernel\mem.conf](./configs/kernel/mem.conf)。
+
+```
+CONFIG_UTEST_MEMHEAP_TC=y
+
+# dependencies
+CONFIG_RT_USING_MEMHEAP=y
+```
+
+2. 如果要添加新的测试集合，需要参考已有的测试集合，在 [examples\utest\configs](./configs) 目录下添加新的测试集合配置项。并更新 [.github\workflows\action_utest.yml](../../.github/workflows/action_utest.yml) 内的测试集合。
+
+```
+- {UTEST: "kernel/mem",       RTT_BSP: "bsp/qemu-vexpress-a9",   QEMU_ARCH: "arm", QEMU_MACHINE: "vexpress-a9", CONFIG_FILE: "kernel/mem.conf", SD_FILE: "sd.bin"}
+- {UTEST: "components/utest", RTT_BSP: "bsp/qemu-vexpress-a9",   QEMU_ARCH: "arm", QEMU_MACHINE: "vexpress-a9", CONFIG_FILE: "utest_self/self.conf", SD_FILE: "sd.bin"}
+```
+
+3. 向 RT-Thread 主仓库提交合并请求。
\ No newline at end of file
diff --git a/examples/utest/configs/kernel/mem.conf b/examples/utest/configs/kernel/mem.conf
new file mode 100644
index 0000000000..1a311ab9dd
--- /dev/null
+++ b/examples/utest/configs/kernel/mem.conf
@@ -0,0 +1,4 @@
+CONFIG_UTEST_MEMHEAP_TC=y
+
+# dependencies
+CONFIG_RT_USING_MEMHEAP=y
diff --git a/examples/utest/configs/utest_self/self.conf b/examples/utest/configs/utest_self/self.conf
new file mode 100644
index 0000000000..b155a551d2
--- /dev/null
+++ b/examples/utest/configs/utest_self/self.conf
@@ -0,0 +1 @@
+CONFIG_UTEST_SELF_PASS_TC=y
diff --git a/examples/utest/testcases/Kconfig b/examples/utest/testcases/Kconfig
new file mode 100644
index 0000000000..5dc1c6c420
--- /dev/null
+++ b/examples/utest/testcases/Kconfig
@@ -0,0 +1,16 @@
+menu "RT-Thread Utestcases"
+
+config RT_USING_UTESTCASES
+    bool "RT-Thread Utestcases"
+    default n
+    select RT_USING_UTEST
+
+if RT_USING_UTESTCASES
+
+source "$RTT_DIR/examples/utest/testcases/utest/Kconfig"
+source "$RTT_DIR/examples/utest/testcases/kernel/Kconfig"
+source "$RTT_DIR/examples/utest/testcases/drivers/serial_v2/Kconfig"
+
+endif
+
+endmenu
diff --git a/examples/utest/testcases/SConscript b/examples/utest/testcases/SConscript
new file mode 100644
index 0000000000..4c815c49b8
--- /dev/null
+++ b/examples/utest/testcases/SConscript
@@ -0,0 +1,15 @@
+# RT-Thread building script for bridge
+
+import os
+from building import *
+
+cwd = GetCurrentDir()
+objs = []
+list = os.listdir(cwd)
+
+for d in list:
+    path = os.path.join(cwd, d)
+    if os.path.isfile(os.path.join(path, 'SConscript')):
+        objs = objs + SConscript(os.path.join(d, 'SConscript'))
+
+Return('objs')
diff --git a/examples/utest/testcases/drivers/SConscript b/examples/utest/testcases/drivers/SConscript
new file mode 100644
index 0000000000..4c815c49b8
--- /dev/null
+++ b/examples/utest/testcases/drivers/SConscript
@@ -0,0 +1,15 @@
+# RT-Thread building script for bridge
+
+import os
+from building import *
+
+cwd = GetCurrentDir()
+objs = []
+list = os.listdir(cwd)
+
+for d in list:
+    path = os.path.join(cwd, d)
+    if os.path.isfile(os.path.join(path, 'SConscript')):
+        objs = objs + SConscript(os.path.join(d, 'SConscript'))
+
+Return('objs')
diff --git a/examples/utest/testcases/drivers/serial_v2/Kconfig b/examples/utest/testcases/drivers/serial_v2/Kconfig
new file mode 100644
index 0000000000..3c8d480b3a
--- /dev/null
+++ b/examples/utest/testcases/drivers/serial_v2/Kconfig
@@ -0,0 +1,7 @@
+menu "Utest Serial Testcase"
+
+config UTEST_SERIAL_TC
+    bool "Serial testcase"
+    default n
+
+endmenu
diff --git a/examples/utest/testcases/drivers/serial_v2/README.md b/examples/utest/testcases/drivers/serial_v2/README.md
new file mode 100644
index 0000000000..38d71ce8e8
--- /dev/null
+++ b/examples/utest/testcases/drivers/serial_v2/README.md
@@ -0,0 +1,120 @@
+## 1、介绍
+
+该目录下 c 文件是新版本串口的测试用例，在 `examples/utest/testcases/drivers/serial_v2` 目录结构里，该测试用例用来测试串口的各个操作模式是否正常工作。
+
+## 2、 文件说明
+
+| 文件             | 描述                                      |
+| ---------------- | ----------------------------------------- |
+| uart_rxb_txb.c   | 串口接收阻塞和发送阻塞模式 的测试用例     |
+| uart_rxb_txnb.c  | 串口接收阻塞和发送非阻塞模式 的测试用例   |
+| uart_rxnb_txb.c  | 串口接收非阻塞和发送阻塞模式 的测试用例   |
+| uart_rxnb_txnb.c | 串口接收非阻塞和发送非阻塞模式 的测试用例 |
+
+## 3、软硬件环境
+
+硬件上需要支持 RT-Thread 的完整版操作系统，版本为4.0.4及以上，且硬件有串口硬件外设，软件上需要支持 内核接口、IPC 、Device 框架。
+
+## 4、测试项
+
+### 4.1 测试说明
+
+上文所提及的模式是指串口使用时的操作模式，不涉及硬件的工作模式的配置情况（硬件工作模式一般有轮询POLL、中断INT、DMA），因此使用时需要结合具体的硬件工作模式去配置使用。例如 发送阻塞和接收非阻塞模式 ，这个测试有很多种硬件配置，配置情况例如：DMA发送阻塞和DMA接收非阻塞，INT发送阻塞和DMA接收非阻塞，POLL发送阻塞和DMA接收非阻塞等等。因此通过排列组合后的测试场景有4*9=36种，有意义的组合方式为20种。如下表：
+
+
+| 接收非阻塞 | 发送阻塞 | 组合              | 有意义的组合方式 |
+| ---------- | -------- | ----------------- | ---------------- |
+| POLL       | POLL     | RX_POLL + TX_POLL |                  |
+|            | INT      | RX_POLL + TX_INT  |                  |
+|            | DMA      | RX_POLL + TX_DMA  |                  |
+| INT        | POLL     | RX_INT + TX_POLL  | ✔                |
+|            | INT      | RX_INT + TX_INT   | ✔                |
+|            | DMA      | RX_INT + TX_DMA   | ✔                |
+| DMA        | POLL     | RX_DMA + TX_POLL  | ✔                |
+|            | INT      | RX_DMA + TX_INT   | ✔                |
+|            | DMA      | RX_DMA + TX_DMA   | ✔                |
+
+| 接收非阻塞 | 发送非阻塞 | 组合              | 有意义的组合方式 |
+| ---------- | ---------- | ----------------- | ---------------- |
+| POLL       | POLL       | RX_POLL + TX_POLL |                  |
+|            | INT        | RX_POLL + TX_INT  |                  |
+|            | DMA        | RX_POLL + TX_DMA  |                  |
+| INT        | POLL       | RX_INT + TX_POLL  |                  |
+|            | INT        | RX_INT + TX_INT   | ✔                |
+|            | DMA        | RX_INT + TX_DMA   | ✔                |
+| DMA        | POLL       | RX_DMA + TX_POLL  |                  |
+|            | INT        | RX_DMA + TX_INT   | ✔                |
+|            | DMA        | RX_DMA + TX_DMA   | ✔                |
+
+| 接收阻塞 | 发送阻塞 | 组合              | 有意义的组合方式 |
+| -------- | -------- | ----------------- | ---------------- |
+| POLL     | POLL     | RX_POLL + TX_POLL |                  |
+|          | INT      | RX_POLL + TX_INT  |                  |
+|          | DMA      | RX_POLL + TX_DMA  |                  |
+| INT      | POLL     | RX_INT + TX_POLL  | ✔                |
+|          | INT      | RX_INT + TX_INT   | ✔                |
+|          | DMA      | RX_INT + TX_DMA   | ✔                |
+| DMA      | POLL     | RX_DMA + TX_POLL  | ✔                |
+|          | INT      | RX_DMA + TX_INT   | ✔                |
+|          | DMA      | RX_DMA + TX_DMA   | ✔                |
+
+| 接收阻塞 | 发送非阻塞 | 组合              | 有意义的组合方式 |
+| -------- | ---------- | ----------------- | ---------------- |
+| POLL     | POLL       | RX_POLL + TX_POLL |                  |
+|          | INT        | RX_POLL + TX_INT  |                  |
+|          | DMA        | RX_POLL + TX_DMA  |                  |
+| INT      | POLL       | RX_INT + TX_POLL  |                  |
+|          | INT        | RX_INT + TX_INT   | ✔                |
+|          | DMA        | RX_INT + TX_DMA   | ✔                |
+| DMA      | POLL       | RX_DMA + TX_POLL  |                  |
+|          | INT        | RX_DMA + TX_INT   | ✔                |
+|          | DMA        | RX_DMA + TX_DMA   | ✔                |
+
+需要解释的是，为什么会存在无意义的组合模式，举个例子，非阻塞模式下，肯定是不会出现POLL（轮询）方式的，因为POLL方式已经表明是阻塞方式了。
+该测试用例在测试多种组合时，需要通过更改`rtconfig.h`文件对硬件模式进行静态配置。
+
+### 4.2 测试思路
+
+这四个测试用例的测试思路基本一致。
+
+硬件上：**短接串口的发送TX引脚和接收RX引脚，完成自发自收的回路**。
+
+软件上：创建两个线程A和B，A为接收线程，B为发送线程，设置A线程优先级比B线程优先级高。发送线程发送随机长度（长度范围是 0 到 1000）的数据，接收线程接收到数据进行校验，数据正确则测试通过，默认测试100次。
+
+## 5、配置
+
+使用该测试用例需要在 `env` 工具的 `menuconfig` 中做相关配置，配置如下所示（使用 RT-Thread-Studio 的配置路径一致 ）：
+
+```
+RT-Thread Utestcases  --->
+    [*] RT-Thread Utestcases  --->
+           Utest Serial Testcase --->
+                [*] Serial testcase
+```
+
+## 6、使用
+
+\- 编译下载。
+
+\- 在 MSH 中输入 `utest_run testcases.drivers.uart_rxb_txb` 运行串口接收阻塞和发送阻塞测试用例。
+
+\- 在 MSH 中输入 `utest_run testcases.drivers.uart_rxb_txb` 运行串口接收阻塞和发送阻塞测试用例。
+
+\- 在 MSH 中输入 `utest_run testcases.drivers.uart_rxb_txb` 运行串口接收阻塞和发送阻塞测试用例。
+
+\- 在 MSH 中输入 `utest_run testcases.drivers.uart_rxb_txb` 运行串口接收阻塞和发送阻塞测试用例。
+
+如果仅仅配置了 `Serial testcase` 相关的测试用例，则直接输入 `utest_run` 运行即可将上述测试用例按序测试。
+
+## 7、注意事项
+
+\- 需配置正确的测试用例。
+
+\- 如有需要，可开启 ULOG 查看测试用例日志信息。
+
+\- 需在 MSH 中输入正确的命令行。
+
+\- 测试用例默认的测试数据长度范围最大为1000字节，如果接收端的缓冲区大小配置为小于1000字节时，那么在测试接收阻塞模式时，将会由于获取不了1000字节长度导致线程持续阻塞（因为测试用例是按 `recv_len` 长度去接收的，而不是按照单字节去接收的），因此建议接收端的缓冲区大小 （对应宏例如为 `BSP_UART2_RX_BUFSIZE`）设置为1024即可；当然也可按需减小测试的最大数据长度。
+
+\- 该测试用例需要结合硬件具体的工作模式（POLL 、INT、DMA）进行测试，而硬件工作模式只能选择一种，因此需要在 `rtconfig.h` 中对串口相应的宏进行配置，来选择不同的工作模式去进行测试。
+
diff --git a/examples/utest/testcases/drivers/serial_v2/SConscript b/examples/utest/testcases/drivers/serial_v2/SConscript
new file mode 100644
index 0000000000..a7a46e656a
--- /dev/null
+++ b/examples/utest/testcases/drivers/serial_v2/SConscript
@@ -0,0 +1,16 @@
+Import('rtconfig')
+from building import *
+
+cwd     = GetCurrentDir()
+src     = Split('''
+uart_rxb_txnb.c
+uart_rxb_txb.c
+uart_rxnb_txb.c
+uart_rxnb_txnb.c
+''')
+
+CPPPATH = [cwd]
+
+group = DefineGroup('utestcases', src, depend = ['UTEST_SERIAL_TC'], CPPPATH = CPPPATH)
+
+Return('group')
diff --git a/examples/utest/testcases/drivers/serial_v2/uart_rxb_txb.c b/examples/utest/testcases/drivers/serial_v2/uart_rxb_txb.c
new file mode 100644
index 0000000000..8b2205ee1a
--- /dev/null
+++ b/examples/utest/testcases/drivers/serial_v2/uart_rxb_txb.c
@@ -0,0 +1,230 @@
+/*
+ * Copyright (c) 2006-2019, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2021-06-16     KyleChan     the first version
+ */
+
+#include <rtthread.h>
+#include "utest.h"
+#include <rtdevice.h>
+#include <stdlib.h>
+
+#define TC_UART_DEVICE_NAME "uart2"
+#define TC_UART_SEND_TIMES 100
+
+
+#ifdef UTEST_SERIAL_TC
+
+#define TEST_UART_NAME            TC_UART_DEVICE_NAME
+
+static struct rt_serial_device *serial;
+static rt_uint8_t uart_over_flag;
+static rt_bool_t uart_result = RT_TRUE;
+
+static rt_err_t uart_find(void)
+{
+    serial = (struct rt_serial_device *)rt_device_find(TEST_UART_NAME);
+
+    if (serial == RT_NULL)
+    {
+        LOG_E("find %s device failed!\n", TEST_UART_NAME);
+        return -RT_ERROR;
+    }
+
+    return RT_EOK;
+}
+
+static void uart_send_entry(void *parameter)
+{
+    rt_uint8_t *uart_write_buffer;
+    rt_uint16_t send_len;
+
+    rt_uint32_t i = 0;
+    send_len = *(rt_uint16_t *)parameter;
+    /* assign send buffer */
+    uart_write_buffer = (rt_uint8_t *)rt_malloc(send_len);
+    if (uart_write_buffer == RT_NULL)
+    {
+        LOG_E("Without spare memory for uart dma!");
+        uart_result = RT_FALSE;
+        return;
+    }
+
+    rt_memset(uart_write_buffer, 0, send_len);
+
+    for (i = 0; i < send_len; i++)
+    {
+        uart_write_buffer[i] = (rt_uint8_t)i;
+    }
+    /* send buffer */
+    if (rt_device_write(&serial->parent, 0, uart_write_buffer, send_len) != send_len)
+    {
+        LOG_E("device write failed\r\n");
+    }
+    rt_free(uart_write_buffer);
+
+}
+
+static void uart_rec_entry(void *parameter)
+{
+    rt_uint16_t rev_len;
+
+    rev_len = *(rt_uint16_t *)parameter;
+    rt_uint8_t *ch;
+    ch = (rt_uint8_t *)rt_calloc(1, sizeof(rt_uint8_t) * (rev_len + 1));
+    rt_int32_t cnt, i;
+    rt_uint8_t last_old_data;
+    rt_bool_t fisrt_flag = RT_TRUE;
+    rt_uint32_t all_receive_length = 0;
+
+
+    while (1)
+    {
+        cnt = rt_device_read(&serial->parent, 0, (void *)ch, rev_len);
+        if (cnt == 0)
+        {
+            continue;
+        }
+
+        if (fisrt_flag != RT_TRUE)
+        {
+            if ((rt_uint8_t)(last_old_data + 1) != ch[0])
+            {
+                LOG_E("_Read Different data -> former data: %x, current data: %x.", last_old_data, ch[0]);
+                uart_result = RT_FALSE;
+                rt_free(ch);
+                return;
+            }
+        }
+        else
+        {
+            fisrt_flag = RT_FALSE;
+        }
+
+        for (i = 0; i < cnt - 1; i++)
+        {
+            if ((rt_uint8_t)(ch[i] + 1) != ch[i + 1])
+            {
+                LOG_E("Read Different data -> former data: %x, current data: %x.", ch[i], ch[i + 1]);
+
+                uart_result = RT_FALSE;
+                rt_free(ch);
+                return;
+            }
+        }
+        all_receive_length += cnt;
+        if (all_receive_length >= rev_len)
+            break;
+        else
+            last_old_data = ch[cnt - 1];
+    }
+    rt_free(ch);
+    uart_over_flag = RT_TRUE;
+}
+
+static rt_err_t uart_api(rt_uint16_t length)
+{
+    rt_thread_t thread_send = RT_NULL;
+    rt_thread_t thread_recv = RT_NULL;
+    rt_err_t result = RT_EOK;
+    uart_over_flag = RT_FALSE;
+
+    result = uart_find();
+    if (result != RT_EOK)
+    {
+        return -RT_ERROR;
+    }
+
+    /* Reinitialize */
+    struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
+    config.baud_rate = BAUD_RATE_115200;
+    config.rx_bufsz = BSP_UART2_RX_BUFSIZE;
+    config.tx_bufsz = BSP_UART2_TX_BUFSIZE;
+    rt_device_control(&serial->parent, RT_DEVICE_CTRL_CONFIG, &config);
+
+    result = rt_device_open(&serial->parent, RT_DEVICE_FLAG_RX_BLOCKING | RT_DEVICE_FLAG_TX_BLOCKING);
+
+    if (result != RT_EOK)
+    {
+        LOG_E("Open uart device failed.");
+        uart_result = RT_FALSE;
+        return -RT_ERROR;
+    }
+
+    thread_send = rt_thread_create("uart_send", uart_send_entry, &length, 1024, RT_THREAD_PRIORITY_MAX - 4, 10);
+    thread_recv = rt_thread_create("uart_recv", uart_rec_entry, &length, 1024, RT_THREAD_PRIORITY_MAX - 5, 10);
+    if ((thread_send != RT_NULL) && (thread_recv != RT_NULL))
+    {
+        rt_thread_startup(thread_send);
+        rt_thread_startup(thread_recv);
+    }
+    else
+    {
+        result = -RT_ERROR;
+        goto __exit;
+    }
+
+    while (1)
+    {
+        if (uart_result != RT_TRUE)
+        {
+            LOG_E("The test for uart dma is failure.");
+            result = -RT_ERROR;
+            goto __exit;
+        }
+        if (uart_over_flag == RT_TRUE)
+        {
+            goto __exit;
+        }
+        /* waiting for test over */
+        rt_thread_mdelay(5);
+    }
+__exit:
+    rt_device_close(&serial->parent);
+    return result;
+}
+
+static void tc_uart_api(void)
+{
+    rt_uint32_t times = 0;
+    rt_uint16_t num = 0;
+    while (TC_UART_SEND_TIMES - times)
+    {
+        num = (rand() % 1000) + 1;
+        if(uart_api(num) == RT_EOK)
+           LOG_I("data_lens [%3d], it is correct to read and write data. [%d] times testing.", num, ++times);
+        else
+        {
+            LOG_E("uart test error");
+            break;
+        }
+    }
+    uassert_true(uart_over_flag == RT_TRUE);
+}
+
+static rt_err_t utest_tc_init(void)
+{
+    LOG_I("UART TEST: Please connect Tx and Rx directly for self testing.");
+    return RT_EOK;
+}
+
+static rt_err_t utest_tc_cleanup(void)
+{
+    uart_result = RT_TRUE;
+    uart_over_flag = RT_FALSE;
+
+    return RT_EOK;
+}
+
+static void testcase(void)
+{
+    UTEST_UNIT_RUN(tc_uart_api);
+}
+
+UTEST_TC_EXPORT(testcase, "testcases.drivers.uart_rxb_txb", utest_tc_init, utest_tc_cleanup, 30);
+
+#endif /* TC_UART_USING_TC */
diff --git a/examples/utest/testcases/drivers/serial_v2/uart_rxb_txnb.c b/examples/utest/testcases/drivers/serial_v2/uart_rxb_txnb.c
new file mode 100644
index 0000000000..f03a24fe13
--- /dev/null
+++ b/examples/utest/testcases/drivers/serial_v2/uart_rxb_txnb.c
@@ -0,0 +1,263 @@
+/*
+ * Copyright (c) 2006-2019, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2021-06-16     KyleChan     the first version
+ */
+
+#include <rtthread.h>
+#include "utest.h"
+#include <rtdevice.h>
+#include <stdlib.h>
+
+#define TC_UART_DEVICE_NAME "uart2"
+#define TC_UART_SEND_TIMES 100
+
+
+#ifdef UTEST_SERIAL_TC
+
+#define TEST_UART_NAME            TC_UART_DEVICE_NAME
+
+static struct rt_serial_device *serial;
+static rt_sem_t tx_sem;
+static rt_uint8_t uart_over_flag;
+static rt_bool_t uart_result = RT_TRUE;
+
+static rt_err_t uart_find(void)
+{
+    serial = (struct rt_serial_device *)rt_device_find(TEST_UART_NAME);
+
+    if (serial == RT_NULL)
+    {
+        LOG_E("find %s device failed!\n", TEST_UART_NAME);
+        return -RT_ERROR;
+    }
+
+    return RT_EOK;
+}
+
+static rt_err_t uart_tx_completion(rt_device_t device, void *buffer)
+{
+    rt_sem_release(tx_sem);
+
+    return RT_EOK;
+}
+
+static void uart_send_entry(void *parameter)
+{
+    rt_uint8_t *uart_write_buffer;
+    rt_uint16_t send_len, len = 0;
+    rt_err_t result;
+
+    rt_uint32_t i = 0;
+    send_len = *(rt_uint16_t *)parameter;
+    /* assign send buffer */
+    uart_write_buffer = (rt_uint8_t *)rt_malloc(send_len);
+    if (uart_write_buffer == RT_NULL)
+    {
+        LOG_E("Without spare memory for uart dma!");
+        uart_result = RT_FALSE;
+        return;
+    }
+
+    rt_memset(uart_write_buffer, 0, send_len);
+
+    for (i = 0; i < send_len; i++)
+    {
+        uart_write_buffer[i] = (rt_uint8_t)i;
+    }
+    /* send buffer */
+    while (send_len - len)
+    {
+        len += rt_device_write(&serial->parent, 0, uart_write_buffer + len, send_len - len);
+        result = rt_sem_take(tx_sem, RT_WAITING_FOREVER);
+        if (result != RT_EOK)
+        {
+            LOG_E("take sem err in send.");
+        }
+    }
+    rt_free(uart_write_buffer);
+
+}
+
+static void uart_rec_entry(void *parameter)
+{
+    rt_uint16_t rev_len;
+
+    rev_len = *(rt_uint16_t *)parameter;
+    rt_uint8_t *ch;
+    ch = (rt_uint8_t *)rt_calloc(1, sizeof(rt_uint8_t) * (rev_len + 1));
+    rt_int32_t cnt, i;
+    rt_uint8_t last_old_data;
+    rt_bool_t fisrt_flag = RT_TRUE;
+    rt_uint32_t all_receive_length = 0;
+
+    while (1)
+    {
+        cnt = rt_device_read(&serial->parent, 0, (void *)ch, rev_len);
+        if (cnt != rev_len)
+        {
+            continue;
+        }
+
+        if (fisrt_flag != RT_TRUE)
+        {
+            if ((rt_uint8_t)(last_old_data + 1) != ch[0])
+            {
+                LOG_E("_Read Different data -> former data: %x, current data: %x.", last_old_data, ch[0]);
+                uart_result = RT_FALSE;
+                rt_free(ch);
+                return;
+            }
+        }
+        else
+        {
+            fisrt_flag = RT_FALSE;
+        }
+
+        for (i = 0; i < cnt - 1; i++)
+        {
+            if ((rt_uint8_t)(ch[i] + 1) != ch[i + 1])
+            {
+                LOG_E("Read Different data -> former data: %x, current data: %x.", ch[i], ch[i + 1]);
+
+                uart_result = RT_FALSE;
+                rt_free(ch);
+                return;
+            }
+        }
+        all_receive_length += cnt;
+        if (all_receive_length >= rev_len)
+            break;
+        else
+            last_old_data = ch[cnt - 1];
+    }
+    rt_free(ch);
+    uart_over_flag = RT_TRUE;
+}
+
+static rt_err_t uart_api(rt_uint16_t test_buf)
+{
+    rt_thread_t thread_send = RT_NULL;
+    rt_thread_t thread_recv = RT_NULL;
+    rt_err_t result = RT_EOK;
+    uart_over_flag = RT_FALSE;
+
+    result = uart_find();
+    if (result != RT_EOK)
+    {
+        return -RT_ERROR;
+    }
+
+    tx_sem = rt_sem_create("tx_sem", 0, RT_IPC_FLAG_PRIO);
+    if (tx_sem == RT_NULL)
+    {
+        LOG_E("Init sem failed.");
+        uart_result = RT_FALSE;
+        return -RT_ERROR;
+    }
+
+    /* Reinitialize */
+    struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
+    config.baud_rate = BAUD_RATE_115200;
+    config.rx_bufsz = BSP_UART2_RX_BUFSIZE;
+    config.tx_bufsz = BSP_UART2_TX_BUFSIZE;
+    rt_device_control(&serial->parent, RT_DEVICE_CTRL_CONFIG, &config);
+
+    result = rt_device_open(&serial->parent, RT_DEVICE_FLAG_RX_BLOCKING | RT_DEVICE_FLAG_TX_NON_BLOCKING);
+
+    if (result != RT_EOK)
+    {
+        LOG_E("Open uart device failed.");
+        uart_result = RT_FALSE;
+        return -RT_ERROR;
+    }
+
+    /* set receive callback function */
+    result = rt_device_set_tx_complete(&serial->parent, uart_tx_completion);
+    if (result != RT_EOK)
+    {
+        goto __exit;
+    }
+
+    thread_recv = rt_thread_create("uart_recv", uart_rec_entry, &test_buf, 1024, RT_THREAD_PRIORITY_MAX - 5, 10);
+    thread_send = rt_thread_create("uart_send", uart_send_entry, &test_buf, 1024, RT_THREAD_PRIORITY_MAX - 4, 10);
+
+    if (thread_send != RT_NULL && thread_recv != RT_NULL)
+    {
+        rt_thread_startup(thread_recv);
+        rt_thread_startup(thread_send);
+    }
+    else
+    {
+        result = -RT_ERROR;
+        goto __exit;
+    }
+
+    while (1)
+    {
+        if (uart_result != RT_TRUE)
+        {
+            LOG_E("The test for uart dma is failure.");
+            result = -RT_ERROR;
+            goto __exit;
+        }
+        if (uart_over_flag == RT_TRUE)
+        {
+            goto __exit;
+        }
+        /* waiting for test over */
+        rt_thread_mdelay(5);
+    }
+__exit:
+    if (tx_sem)
+        rt_sem_delete(tx_sem);
+
+    rt_device_close(&serial->parent);
+    return result;
+}
+
+static void tc_uart_api(void)
+{
+    rt_uint32_t times = 0;
+    rt_uint16_t num = 0;
+    while (TC_UART_SEND_TIMES - times)
+    {
+        num = (rand() % 1000) + 1;
+        if(uart_api(num) == RT_EOK)
+           LOG_I("data_lens [%3d], it is correct to read and write data. [%d] times testing.", num, ++times);
+        else
+        {
+            LOG_E("uart test error");
+            break;
+        }
+    }
+    uassert_true(uart_over_flag == RT_TRUE);
+}
+
+static rt_err_t utest_tc_init(void)
+{
+    LOG_I("UART TEST: Please connect Tx and Rx directly for self testing.");
+    return RT_EOK;
+}
+
+static rt_err_t utest_tc_cleanup(void)
+{
+    tx_sem = RT_NULL;
+    uart_result = RT_TRUE;
+    uart_over_flag = RT_FALSE;
+
+    return RT_EOK;
+}
+
+static void testcase(void)
+{
+    UTEST_UNIT_RUN(tc_uart_api);
+}
+
+UTEST_TC_EXPORT(testcase, "testcases.drivers.uart_rxb_txnb", utest_tc_init, utest_tc_cleanup, 30);
+
+#endif
diff --git a/examples/utest/testcases/drivers/serial_v2/uart_rxnb_txb.c b/examples/utest/testcases/drivers/serial_v2/uart_rxnb_txb.c
new file mode 100644
index 0000000000..c1c88ddc9f
--- /dev/null
+++ b/examples/utest/testcases/drivers/serial_v2/uart_rxnb_txb.c
@@ -0,0 +1,266 @@
+/*
+ * Copyright (c) 2006-2019, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2021-06-16     KyleChan     the first version
+ */
+
+#include <rtthread.h>
+#include "utest.h"
+#include <rtdevice.h>
+#include <stdlib.h>
+
+#define TC_UART_DEVICE_NAME "uart2"
+#define TC_UART_SEND_TIMES 100
+
+
+#ifdef UTEST_SERIAL_TC
+
+#define TEST_UART_NAME            TC_UART_DEVICE_NAME
+
+static struct rt_serial_device *serial;
+static rt_sem_t rx_sem;
+static rt_uint8_t uart_over_flag;
+static rt_bool_t uart_result = RT_TRUE;
+
+static rt_err_t uart_find(void)
+{
+    serial = (struct rt_serial_device *)rt_device_find(TEST_UART_NAME);
+
+    if (serial == RT_NULL)
+    {
+        LOG_E("find %s device failed!\n", TEST_UART_NAME);
+        return -RT_ERROR;
+    }
+
+    return RT_EOK;
+}
+
+static rt_err_t uart_rx_indicate(rt_device_t device, rt_size_t size)
+{
+    rt_sem_release(rx_sem);
+
+    return RT_EOK;
+}
+
+static void uart_send_entry(void *parameter)
+{
+    rt_uint8_t *uart_write_buffer;
+    rt_uint16_t send_len;
+
+    rt_uint32_t i = 0;
+    send_len = *(rt_uint16_t *)parameter;
+
+    /* assign send buffer */
+    uart_write_buffer = (rt_uint8_t *)rt_malloc(send_len);
+    if (uart_write_buffer == RT_NULL)
+    {
+        LOG_E("Without spare memory for uart dma!");
+        uart_result = RT_FALSE;
+        return;
+    }
+
+    rt_memset(uart_write_buffer, 0, send_len);
+
+    for (i = 0; i < send_len; i++)
+    {
+        uart_write_buffer[i] = (rt_uint8_t)i;
+    }
+
+    /* send buffer */
+    if (rt_device_write(&serial->parent, 0, uart_write_buffer, send_len) != send_len)
+    {
+        LOG_E("device write failed\r\n");
+    }
+    rt_free(uart_write_buffer);
+}
+
+static void uart_rec_entry(void *parameter)
+{
+    rt_uint16_t rev_len;
+
+    rev_len = *(rt_uint16_t *)parameter;
+    rt_uint8_t *ch;
+    ch = (rt_uint8_t *)rt_calloc(1, sizeof(rt_uint8_t) * (rev_len + 1));
+    rt_int32_t cnt, i;
+    rt_uint8_t last_old_data;
+    rt_bool_t fisrt_flag = RT_TRUE;
+    rt_uint32_t all_receive_length = 0;
+
+    while (1)
+    {
+        rt_err_t result;
+
+        result = rt_sem_take(rx_sem, RT_WAITING_FOREVER);
+        if (result != RT_EOK)
+        {
+            LOG_E("take sem err in recv.");
+        }
+
+        cnt = rt_device_read(&serial->parent, 0, (void *)ch, rev_len);
+        if (cnt == 0)
+        {
+            continue;
+        }
+
+        if (fisrt_flag != RT_TRUE)
+        {
+            if ((rt_uint8_t)(last_old_data + 1) != ch[0])
+            {
+                LOG_E("_Read Different data -> former data: %x, current data: %x.", last_old_data, ch[0]);
+                uart_result = RT_FALSE;
+                rt_free(ch);
+                return;
+            }
+        }
+        else
+        {
+            fisrt_flag = RT_FALSE;
+        }
+
+        for (i = 0; i < cnt - 1; i++)
+        {
+            if ((rt_uint8_t)(ch[i] + 1) != ch[i + 1])
+            {
+                LOG_E("Read Different data -> former data: %x, current data: %x.", ch[i], ch[i + 1]);
+
+                uart_result = RT_FALSE;
+                rt_free(ch);
+                return;
+            }
+        }
+        all_receive_length += cnt;
+        if (all_receive_length >= rev_len)
+            break;
+        else
+            last_old_data = ch[cnt - 1];
+    }
+    rt_free(ch);
+    uart_over_flag = RT_TRUE;
+}
+
+static rt_err_t uart_api(rt_uint16_t test_buf)
+{
+    rt_thread_t thread_send = RT_NULL;
+    rt_thread_t thread_recv = RT_NULL;
+    rt_err_t result = RT_EOK;
+
+    result = uart_find();
+    if (result != RT_EOK)
+    {
+        return -RT_ERROR;
+    }
+
+    rx_sem = rt_sem_create("rx_sem", 0, RT_IPC_FLAG_PRIO);
+    if (rx_sem == RT_NULL)
+    {
+        LOG_E("Init sem failed.");
+        uart_result = RT_FALSE;
+        return -RT_ERROR;
+    }
+
+    /* reinitialize */
+    struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
+    config.baud_rate = BAUD_RATE_115200;
+    config.rx_bufsz = BSP_UART2_RX_BUFSIZE;
+    config.tx_bufsz = BSP_UART2_TX_BUFSIZE;
+    rt_device_control(&serial->parent, RT_DEVICE_CTRL_CONFIG, &config);
+
+    result = rt_device_open(&serial->parent, RT_DEVICE_FLAG_RX_NON_BLOCKING | RT_DEVICE_FLAG_TX_BLOCKING);
+
+    if (result != RT_EOK)
+    {
+        LOG_E("Open uart device failed.");
+        uart_result = RT_FALSE;
+        rt_sem_delete(rx_sem);
+        return -RT_ERROR;
+    }
+
+    /* set receive callback function */
+    result = rt_device_set_rx_indicate(&serial->parent, uart_rx_indicate);
+    if (result != RT_EOK)
+    {
+        goto __exit;
+    }
+
+    thread_recv = rt_thread_create("uart_recv", uart_rec_entry, &test_buf, 1024, RT_THREAD_PRIORITY_MAX - 5, 10);
+    thread_send = rt_thread_create("uart_send", uart_send_entry, &test_buf, 1024, RT_THREAD_PRIORITY_MAX - 4, 10);
+
+    if (thread_send != RT_NULL && thread_recv != RT_NULL)
+    {
+        rt_thread_startup(thread_recv);
+        rt_thread_startup(thread_send);
+    }
+    else
+    {
+        result = -RT_ERROR;
+        goto __exit;
+    }
+
+    while (1)
+    {
+        if (uart_result != RT_TRUE)
+        {
+            LOG_E("The test for uart dma is failure.");
+            result = -RT_ERROR;
+            goto __exit;
+        }
+        if (uart_over_flag == RT_TRUE)
+        {
+            goto __exit;
+        }
+        /* waiting for test over */
+        rt_thread_mdelay(5);
+    }
+__exit:
+    if (rx_sem)
+        rt_sem_delete(rx_sem);
+    rt_device_close(&serial->parent);
+    uart_over_flag = RT_FALSE;
+    return result;
+}
+
+static void tc_uart_api(void)
+{
+    rt_uint32_t times = 0;
+    rt_uint16_t num = 0;
+    while (TC_UART_SEND_TIMES - times)
+    {
+        num = (rand() % 1000) + 1;
+        if(uart_api(num) == RT_EOK)
+           LOG_I("data_lens [%3d], it is correct to read and write data. [%d] times testing.", num, ++times);
+        else
+        {
+            LOG_E("uart test error");
+            break;
+        }
+    }
+    uassert_true(uart_result == RT_TRUE);
+}
+
+static rt_err_t utest_tc_init(void)
+{
+    LOG_I("UART TEST: Please connect Tx and Rx directly for self testing.");
+    return RT_EOK;
+}
+
+static rt_err_t utest_tc_cleanup(void)
+{
+    rx_sem = RT_NULL;
+    uart_result = RT_TRUE;
+    uart_over_flag = RT_FALSE;
+
+    return RT_EOK;
+}
+
+static void testcase(void)
+{
+    UTEST_UNIT_RUN(tc_uart_api);
+}
+
+UTEST_TC_EXPORT(testcase, "testcases.drivers.uart_rxnb_txb", utest_tc_init, utest_tc_cleanup, 30);
+
+#endif /* TC_UART_USING_TC */
diff --git a/examples/utest/testcases/drivers/serial_v2/uart_rxnb_txnb.c b/examples/utest/testcases/drivers/serial_v2/uart_rxnb_txnb.c
new file mode 100644
index 0000000000..ad8d20b8cf
--- /dev/null
+++ b/examples/utest/testcases/drivers/serial_v2/uart_rxnb_txnb.c
@@ -0,0 +1,294 @@
+/*
+ * Copyright (c) 2006-2019, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2021-06-16     KyleChan     the first version
+ */
+
+#include <rtthread.h>
+#include "utest.h"
+#include <rtdevice.h>
+#include <stdlib.h>
+
+#define TC_UART_DEVICE_NAME "uart2"
+#define TC_UART_SEND_TIMES 100
+
+
+#ifdef UTEST_SERIAL_TC
+
+#define TEST_UART_NAME            TC_UART_DEVICE_NAME
+
+static struct rt_serial_device *serial;
+static rt_sem_t tx_sem;
+static rt_sem_t rx_sem;
+static rt_uint8_t uart_over_flag;
+static rt_bool_t uart_result = RT_TRUE;
+
+static rt_err_t uart_find(void)
+{
+    serial = (struct rt_serial_device *)rt_device_find(TEST_UART_NAME);
+
+    if (serial == RT_NULL)
+    {
+        LOG_E("find %s device failed!\n", TEST_UART_NAME);
+        return -RT_ERROR;
+    }
+
+    return RT_EOK;
+}
+
+static rt_err_t uart_tx_completion(rt_device_t device, void *buffer)
+{
+    rt_sem_release(tx_sem);
+    return RT_EOK;
+}
+
+static rt_err_t uart_rx_indicate(rt_device_t device, rt_size_t size)
+{
+    rt_sem_release(rx_sem);
+    return RT_EOK;
+}
+
+static void uart_send_entry(void *parameter)
+{
+    rt_uint8_t *uart_write_buffer;
+    rt_uint16_t send_len, len = 0;
+    rt_err_t result;
+
+    rt_uint32_t i = 0;
+    send_len = *(rt_uint16_t *)parameter;
+    /* assign send buffer */
+    uart_write_buffer = (rt_uint8_t *)rt_malloc(send_len);
+    if (uart_write_buffer == RT_NULL)
+    {
+        LOG_E("Without spare memory for uart dma!");
+        uart_result = RT_FALSE;
+        return;
+    }
+
+    rt_memset(uart_write_buffer, 0, send_len);
+
+    for (i = 0; i < send_len; i++)
+    {
+        uart_write_buffer[i] = (rt_uint8_t)i;
+    }
+    /* send buffer */
+    while (send_len - len)
+    {
+        len += rt_device_write(&serial->parent, 0, uart_write_buffer + len, send_len - len);
+        result = rt_sem_take(tx_sem, RT_WAITING_FOREVER);
+        if (result != RT_EOK)
+        {
+            LOG_E("take sem err in send.");
+        }
+    }
+    rt_free(uart_write_buffer);
+
+}
+
+static void uart_rec_entry(void *parameter)
+{
+    rt_uint16_t rev_len;
+
+    rev_len = *(rt_uint16_t *)parameter;
+    rt_uint8_t *ch;
+    ch = (rt_uint8_t *)rt_calloc(1, sizeof(rt_uint8_t) * (rev_len + 1));
+    rt_int32_t cnt, i;
+    rt_uint8_t last_old_data;
+    rt_bool_t fisrt_flag = RT_TRUE;
+    rt_uint32_t all_receive_length = 0;
+
+    while (1)
+    {
+        rt_err_t result;
+
+        result = rt_sem_take(rx_sem, RT_WAITING_FOREVER);
+        if (result != RT_EOK)
+        {
+            LOG_E("take sem err in recv.");
+        }
+
+        cnt = rt_device_read(&serial->parent, 0, (void *)ch, rev_len);
+        if (cnt == 0)
+        {
+            continue;
+        }
+
+        if (fisrt_flag != RT_TRUE)
+        {
+            if ((rt_uint8_t)(last_old_data + 1) != ch[0])
+            {
+                LOG_E("_Read Different data -> former data: %x, current data: %x.", last_old_data, ch[0]);
+                uart_result = RT_FALSE;
+                rt_free(ch);
+                return;
+            }
+        }
+        else
+        {
+            fisrt_flag = RT_FALSE;
+        }
+
+        for (i = 0; i < cnt - 1; i++)
+        {
+            if ((rt_uint8_t)(ch[i] + 1) != ch[i + 1])
+            {
+                LOG_E("Read Different data -> former data: %x, current data: %x.", ch[i], ch[i + 1]);
+
+                uart_result = RT_FALSE;
+                rt_free(ch);
+                return;
+            }
+        }
+        all_receive_length += cnt;
+        if (all_receive_length >= rev_len)
+            break;
+        else
+            last_old_data = ch[cnt - 1];
+    }
+    rt_free(ch);
+    uart_over_flag = RT_TRUE;
+}
+
+static rt_err_t uart_api(rt_uint16_t test_buf)
+{
+    rt_thread_t thread_send = RT_NULL;
+    rt_thread_t thread_recv = RT_NULL;
+    rt_err_t result = RT_EOK;
+    uart_over_flag = RT_FALSE;
+
+    result = uart_find();
+    if (result != RT_EOK)
+    {
+        return -RT_ERROR;
+    }
+
+    rx_sem = rt_sem_create("rx_sem", 0, RT_IPC_FLAG_PRIO);
+    if (rx_sem == RT_NULL)
+    {
+        LOG_E("Init rx_sem failed.");
+        uart_result = RT_FALSE;
+        return -RT_ERROR;
+    }
+
+    tx_sem = rt_sem_create("tx_sem", 0, RT_IPC_FLAG_PRIO);
+    if (tx_sem == RT_NULL)
+    {
+        LOG_E("Init tx_sem failed.");
+        uart_result = RT_FALSE;
+        return -RT_ERROR;
+    }
+
+    /* reinitialize */
+    struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
+    config.baud_rate = BAUD_RATE_115200;
+    config.rx_bufsz = BSP_UART2_RX_BUFSIZE;
+    config.tx_bufsz = BSP_UART2_TX_BUFSIZE;
+    rt_device_control(&serial->parent, RT_DEVICE_CTRL_CONFIG, &config);
+
+    result = rt_device_open(&serial->parent, RT_DEVICE_FLAG_RX_NON_BLOCKING | RT_DEVICE_FLAG_TX_NON_BLOCKING);
+
+    if (result != RT_EOK)
+    {
+        LOG_E("Open uart device failed.");
+        uart_result = RT_FALSE;
+        return -RT_ERROR;
+    }
+
+    /* set receive callback function */
+    result = rt_device_set_tx_complete(&serial->parent, uart_tx_completion);
+    if (result != RT_EOK)
+    {
+        goto __exit;
+    }
+
+    result = rt_device_set_rx_indicate(&serial->parent, uart_rx_indicate);
+    if (result != RT_EOK)
+    {
+        goto __exit;
+    }
+
+    thread_recv = rt_thread_create("uart_recv", uart_rec_entry, &test_buf, 1024, RT_THREAD_PRIORITY_MAX - 5, 10);
+    thread_send = rt_thread_create("uart_send", uart_send_entry, &test_buf, 1024, RT_THREAD_PRIORITY_MAX - 4, 10);
+
+    if (thread_send != RT_NULL && thread_recv != RT_NULL)
+    {
+        rt_thread_startup(thread_recv);
+        rt_thread_startup(thread_send);
+    }
+    else
+    {
+        result = -RT_ERROR;
+        goto __exit;
+    }
+
+    while (1)
+    {
+        if (uart_result != RT_TRUE)
+        {
+            LOG_E("The test for uart dma is failure.");
+            result = -RT_ERROR;
+            goto __exit;
+        }
+        if (uart_over_flag == RT_TRUE)
+        {
+            goto __exit;
+        }
+        /* waiting for test over */
+        rt_thread_mdelay(5);
+    }
+__exit:
+    if (tx_sem)
+        rt_sem_delete(tx_sem);
+
+    if (rx_sem)
+        rt_sem_delete(rx_sem);
+
+    rt_device_close(&serial->parent);
+    return result;
+}
+
+static void tc_uart_api(void)
+{
+    rt_uint32_t times = 0;
+    rt_uint16_t num = 0;
+    while (TC_UART_SEND_TIMES - times)
+    {
+        num = (rand() % 1000) + 1;
+        if(uart_api(num) == RT_EOK)
+           LOG_I("data_lens [%3d], it is correct to read and write data. [%d] times testing.", num, ++times);
+        else
+        {
+            LOG_E("uart test error");
+            break;
+        }
+    }
+    uassert_true(uart_over_flag == RT_TRUE);
+}
+
+static rt_err_t utest_tc_init(void)
+{
+    LOG_I("UART TEST: Please connect Tx and Rx directly for self testing.");
+    return RT_EOK;
+}
+
+static rt_err_t utest_tc_cleanup(void)
+{
+    tx_sem = RT_NULL;
+    uart_result = RT_TRUE;
+    uart_over_flag = RT_FALSE;
+
+    return RT_EOK;
+}
+
+static void testcase(void)
+{
+    UTEST_UNIT_RUN(tc_uart_api);
+}
+
+UTEST_TC_EXPORT(testcase, "testcases.drivers.uart_rxnb_txnb", utest_tc_init, utest_tc_cleanup, 30);
+
+#endif
diff --git a/examples/utest/testcases/kernel/Kconfig b/examples/utest/testcases/kernel/Kconfig
new file mode 100644
index 0000000000..14334af16f
--- /dev/null
+++ b/examples/utest/testcases/kernel/Kconfig
@@ -0,0 +1,8 @@
+menu "Kernel Testcase"
+
+config UTEST_MEMHEAP_TC
+    bool "memheap stability test"
+    default y
+    depends on RT_USING_MEMHEAP
+
+endmenu
diff --git a/examples/utest/testcases/kernel/SConscript b/examples/utest/testcases/kernel/SConscript
new file mode 100644
index 0000000000..9411cdd9a0
--- /dev/null
+++ b/examples/utest/testcases/kernel/SConscript
@@ -0,0 +1,15 @@
+Import('rtconfig')
+from building import *
+
+cwd     = GetCurrentDir()
+src     = Split('''
+''')
+
+if GetDepend(['UTEST_MEMHEAP_TC']):
+    src += ['memheap_tc.c']
+
+CPPPATH = [cwd]
+
+group = DefineGroup('utestcases', src, depend = [], CPPPATH = CPPPATH)
+
+Return('group')
diff --git a/examples/utest/testcases/kernel/memheap_tc.c b/examples/utest/testcases/kernel/memheap_tc.c
new file mode 100644
index 0000000000..ee52bdb185
--- /dev/null
+++ b/examples/utest/testcases/kernel/memheap_tc.c
@@ -0,0 +1,100 @@
+/*
+ * Copyright (c) 2006-2019, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2019-01-16     flybreak     the first version
+ */
+
+#include <rtthread.h>
+#include <stdlib.h>
+#include "utest.h"
+
+#define HEAP_SIZE        (64 * 1024)
+#define HEAP_ALIGN       (4)
+#define SLICE_NUM        (40)
+#define TEST_TIMES       (100000)
+#define HEAP_NAME        "heap1"
+#define SLICE_SIZE_MAX   (HEAP_SIZE/SLICE_NUM)
+
+static void memheap_test(void)
+{
+    struct rt_memheap heap1;
+    rt_uint32_t ptr_start;
+    void *ptr[SLICE_NUM];
+    int i, cnt = 0;
+
+    /* init heap */
+    ptr_start = (rt_uint32_t)rt_malloc_align(HEAP_SIZE, HEAP_ALIGN);
+    if (ptr_start == RT_NULL)
+    {
+        rt_kprintf("totle size too big,can not malloc memory!");
+        return;
+    }
+
+    rt_memheap_init(&heap1, HEAP_NAME, (void *)ptr_start, HEAP_SIZE);
+
+    /* test start */
+    for (i = 0; i < SLICE_NUM; i++)
+    {
+        ptr[i] = 0;
+    }
+    /* test alloc */
+    for (i = 0; i < SLICE_NUM; i++)
+    {
+        rt_uint32_t slice_size = rand() % SLICE_SIZE_MAX;
+        ptr[i] = rt_memheap_alloc(&heap1, slice_size);
+    }
+    /* test realloc */
+    while (cnt < TEST_TIMES)
+    {
+        rt_uint32_t slice_size = rand() % SLICE_SIZE_MAX;
+        rt_uint32_t ptr_index = rand() % SLICE_NUM;
+        rt_uint32_t operation = rand() % 2;
+
+        if (ptr[ptr_index])
+        {
+            if (operation == 0) /* free and malloc */
+            {
+                if (ptr[ptr_index])
+                {
+                    rt_memheap_free(ptr[ptr_index]);
+                }
+                ptr[ptr_index] = rt_memheap_alloc(&heap1, slice_size);
+            }
+            else /* realloc */
+            {
+                ptr[ptr_index] = rt_memheap_realloc(&heap1, ptr[ptr_index], slice_size);
+            }
+        }
+        cnt ++;
+        if (cnt % (TEST_TIMES / 10) == 0)
+        {
+            rt_kprintf(">");
+        }
+    }
+
+    rt_kprintf("test OK!\n");
+
+    /* test end */
+    rt_memheap_detach(&heap1);
+    rt_free_align((void *)ptr_start);
+}
+
+static rt_err_t utest_tc_init(void)
+{
+    return RT_EOK;
+}
+
+static rt_err_t utest_tc_cleanup(void)
+{
+    return RT_EOK;
+}
+
+static void testcase(void)
+{
+    UTEST_UNIT_RUN(memheap_test);
+}
+UTEST_TC_EXPORT(testcase, "testcases.kernel.memheap_tc", utest_tc_init, utest_tc_cleanup, 10);
diff --git a/examples/utest/testcases/utest/Kconfig b/examples/utest/testcases/utest/Kconfig
new file mode 100644
index 0000000000..85b4d796bd
--- /dev/null
+++ b/examples/utest/testcases/utest/Kconfig
@@ -0,0 +1,7 @@
+menu "Utest Self Testcase"
+
+config UTEST_SELF_PASS_TC
+    bool "Pass test"
+    default y
+
+endmenu
diff --git a/examples/utest/testcases/utest/SConscript b/examples/utest/testcases/utest/SConscript
new file mode 100644
index 0000000000..1b35042e44
--- /dev/null
+++ b/examples/utest/testcases/utest/SConscript
@@ -0,0 +1,13 @@
+Import('rtconfig')
+from building import *
+
+cwd     = GetCurrentDir()
+src     = Split('''
+pass_tc.c
+''')
+
+CPPPATH = [cwd]
+
+group = DefineGroup('utestcases', src, depend = ['UTEST_SELF_PASS_TC'], CPPPATH = CPPPATH)
+
+Return('group')
diff --git a/examples/utest/testcases/utest/pass_tc.c b/examples/utest/testcases/utest/pass_tc.c
new file mode 100644
index 0000000000..c9ee912fbf
--- /dev/null
+++ b/examples/utest/testcases/utest/pass_tc.c
@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2006-2019, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2019-01-16     MurphyZhao   the first version
+ */
+
+#include <rtthread.h>
+#include "utest.h"
+
+static void test_assert_pass(void)
+{
+    uassert_true(1);
+    uassert_false(0);
+
+    uassert_null(RT_NULL);
+    uassert_not_null(!RT_NULL);
+
+    uassert_int_equal(1, 1);
+    uassert_int_not_equal(1, 2);
+
+    uassert_str_equal("Hello RT-Thread!", "Hello RT-Thread!");
+    uassert_str_not_equal("Hello RT-Thread!", "Hello");
+
+    uassert_in_range(2048, 1024, 4096);
+    uassert_not_in_range(0, 1024, 4096);
+}
+
+static rt_err_t utest_tc_init(void)
+{
+    return RT_EOK;
+}
+
+static rt_err_t utest_tc_cleanup(void)
+{
+    return RT_EOK;
+}
+
+static void testcase(void)
+{
+    UTEST_UNIT_RUN(test_assert_pass);
+}
+UTEST_TC_EXPORT(testcase, "testcases.utest.pass_tc", utest_tc_init, utest_tc_cleanup, 10);