[serial_v2]串口设备框架serial_v2在utest下的testcases补充 (#8079)

6 files changed, 491 insertions, 3 deletions

diff --git a/examples/utest/testcases/drivers/serial_v2/README.md b/examples/utest/testcases/drivers/serial_v2/README.md
index 38d71ce8e8..3a6625f4bc 100644
--- a/examples/utest/testcases/drivers/serial_v2/README.md
+++ b/examples/utest/testcases/drivers/serial_v2/README.md
@@ -10,6 +10,10 @@
 | 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 |
+| uart_blocking_tx.c| 串口阻塞发送模式 的测试                       |
+| uart_blocking_rx.c| 串口阻塞接收模式 的测试                       |
+| uart_nonblocking_tx.c| 串口非阻塞发送模式 的测试                   |
+| uart_nonblocking_rx.c  | 串口非阻塞接收模式 的测试                   |
 
 ## 3、软硬件环境
 
@@ -75,11 +79,37 @@
 
 ### 4.2 测试思路
 
-这四个测试用例的测试思路基本一致。
+前四个测试用例的测试思路:
 
-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**。
+>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。
 
-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。
+后四个测试用例的测试思路:
+
+>硬件上: **不需要将TX,RX引脚进行短接**,每次只针对发送或接收中的一种进行测试，更为简单与直接
+>
+>软件上: 四个样例每次仅测试TX/RX中的一种引脚与一种对应的阻塞/非阻塞模式  
+>四种测试模式具体分为: 
+>>阻塞接收模式----(硬件工作模式可选: 轮询, 中断, DMA)  
+>>阻塞发送模式----(硬件工作模式可选: 轮询, 中断, DMA)  
+>>非阻塞接收模式--(硬件工作模式可选: 中断, DMA)  
+>>非阻塞发送模式--(硬件工作模式可选: 中断, DMA)  
+>
+>其中阻塞或非阻塞背后的具体硬件工作模式选择(如 轮询, 中断, DMA)需要对`rtconfig.h`文件做出配置,具体配置流程可见文章中关于
+ [seril_v2硬件工作模式的选择](https://club.rt-thread.org/ask/article/b4c536303c8e2335.html "serial_v2源码分析")一节.
+>
+>发送测试流程 :
+>>1. 先关闭串口,再以需要测试的模式打开.
+>>2. 然后依次发送 UART_SEND_TIMES(默认为400) * 1024, 8, 32, 128, 512, 1024个数据.
+>>3. 发送的同时记录每次发送所耗费的时钟周期与成功发送的数据数量.
+>>3. 打印记录的数据,通过时钟周期来反应发送效率, 通过成功发送的数据量来反应是否产生丢包问题.
+>
+>接收测试流程 : 
+>>1. 先关闭串口,再以需要测试的模式打开.
+>>2. 然后以此接收 256, 256, 256, 128, 128, 共计1024个数据
+>>3. 接收的同时记录成功接收的数据数量
+>>4. 打印记录的数据, 通过现实成功接收的数据量与串口发送的数据量做对比,来验证是否出现丢包问题
 
 ## 5、配置
 
@@ -104,6 +134,14 @@ RT-Thread Utestcases  --->
 
 \- 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_blocking_tx` 运行串口阻塞发送测试
+
+\- 在 MSH 中输入 `utest_run testcases.drivers.uart_blocking_rx` 运行串口阻塞接收测试
+
+\- 在 MSH 中输入 `utest_run testcases.drivers.uart_nonblocking_tx` 运行串口非阻塞发送测试
+
+\- 在 MSH 中输入 `utest_run testcases.drivers.uart_nonblocking_rx` 运行串口非阻塞接收测试
+
 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
diff --git a/examples/utest/testcases/drivers/serial_v2/SConscript b/examples/utest/testcases/drivers/serial_v2/SConscript
index a7a46e656a..a7438e3a32 100644
--- a/examples/utest/testcases/drivers/serial_v2/SConscript
+++ b/examples/utest/testcases/drivers/serial_v2/SConscript
@@ -7,6 +7,10 @@ uart_rxb_txnb.c
 uart_rxb_txb.c
 uart_rxnb_txb.c
 uart_rxnb_txnb.c
+uart_blocking_rx.c
+uart_blocking_tx.c
+uart_nonblocking_rx.c
+uart_nonblocking_tx.c
 ''')
 
 CPPPATH = [cwd]
diff --git a/examples/utest/testcases/drivers/serial_v2/uart_blocking_rx.c b/examples/utest/testcases/drivers/serial_v2/uart_blocking_rx.c
new file mode 100644
index 0000000000..2beb9e6fd9
--- /dev/null
+++ b/examples/utest/testcases/drivers/serial_v2/uart_blocking_rx.c
@@ -0,0 +1,93 @@
+#include <rtthread.h>
+#include <rtdevice.h>
+#include "utest.h"
+
+#define SERIAL_UART_NAME "uart2"
+
+#ifdef UTEST_SERIAL_TC
+
+static rt_bool_t block_read(rt_device_t uart_dev)
+{
+    rt_size_t total_length, recv_length;
+    rt_uint8_t uart_read_buffer[1024], log_buffer[64];
+
+    /* make sure device is closed and reopen it */
+    while(rt_device_close(uart_dev) != -RT_ERROR);
+    rt_device_open(uart_dev, RT_DEVICE_FLAG_TX_BLOCKING | RT_DEVICE_FLAG_RX_BLOCKING);
+
+    rt_sprintf(log_buffer, "\nBLOCKING READ BEGIN, PLEASE SEND SOME DATAS\n");
+    rt_device_write(uart_dev, 0, log_buffer, rt_strlen(log_buffer));
+
+    total_length = 0;
+    recv_length = 0;
+    recv_length = rt_device_read(uart_dev, -1, uart_read_buffer, 256);
+    total_length += recv_length;
+
+    rt_sprintf(log_buffer, "\nblock : %d bytes read, total: %d \n", recv_length, total_length);
+    rt_device_write(uart_dev, 0, log_buffer, rt_strlen(log_buffer));
+
+    recv_length = 0;
+    recv_length = rt_device_read(uart_dev, -1, uart_read_buffer, 256);
+    total_length += recv_length;
+
+    rt_sprintf(log_buffer, "\nblock : %d bytes read , total: %d \n", recv_length, total_length);
+    rt_device_write(uart_dev, 0, log_buffer, rt_strlen(log_buffer));
+
+    recv_length = 0;
+    recv_length = rt_device_read(uart_dev, -1, uart_read_buffer, 256);
+    total_length += recv_length;
+
+    rt_sprintf(log_buffer, "\nblock : %d bytes read , total: %d \n", recv_length, total_length);
+    rt_device_write(uart_dev, 0, log_buffer, rt_strlen(log_buffer));
+
+    recv_length = 0;
+    recv_length = rt_device_read(uart_dev, -1, uart_read_buffer, 128);
+    total_length += recv_length;
+
+    rt_sprintf(log_buffer, "\nblock : %d bytes read , total: %d \n", recv_length, total_length);
+    rt_device_write(uart_dev, 0, log_buffer, rt_strlen(log_buffer));
+
+    recv_length = 0;
+    recv_length = rt_device_read(uart_dev, -1, uart_read_buffer, 128);
+    total_length += recv_length;
+
+    rt_sprintf(log_buffer, "\nblock : %d bytes read , total: %d \n", recv_length, total_length);
+    rt_device_write(uart_dev, 0, log_buffer, rt_strlen(log_buffer));
+    rt_thread_mdelay(1000);
+
+    rt_sprintf(log_buffer, "BLOCKING READ END");
+    rt_device_write(uart_dev, 0, log_buffer, rt_strlen(log_buffer));
+
+    return RT_TRUE;
+}
+
+static void uart_test_blocking_rx(void)
+{
+    rt_device_t uart_dev;
+    uart_dev = rt_device_find(SERIAL_UART_NAME);
+    uassert_not_null(uart_dev);
+
+    uassert_true (block_read(uart_dev));
+}
+
+static rt_err_t utest_tc_init(void)
+{
+    return RT_EOK;
+}
+
+static rt_err_t utest_tc_cleanup(void)
+{
+    rt_device_t uart_dev;
+    uart_dev = rt_device_find(SERIAL_UART_NAME);
+    while(rt_device_close(uart_dev) != -RT_ERROR);
+    rt_device_open(uart_dev, RT_DEVICE_FLAG_TX_BLOCKING | RT_DEVICE_FLAG_TX_BLOCKING);
+    return RT_EOK;
+}
+
+static void testcase(void)
+{
+    UTEST_UNIT_RUN(uart_test_blocking_rx);
+}
+UTEST_TC_EXPORT(testcase, "uart_blocking_rx", utest_tc_init, utest_tc_cleanup, 10);
+
+#endif
diff --git a/examples/utest/testcases/drivers/serial_v2/uart_blocking_tx.c b/examples/utest/testcases/drivers/serial_v2/uart_blocking_tx.c
new file mode 100644
index 0000000000..a3653079c1
--- /dev/null
+++ b/examples/utest/testcases/drivers/serial_v2/uart_blocking_tx.c
@@ -0,0 +1,118 @@
+#include <rtthread.h>
+#include <rtdevice.h>
+#include "utest.h"
+
+#define SERIAL_UART_NAME "uart2"
+#define UART_SEND_TIMES 400
+#define UART_TEST_NUMBER 6
+
+#ifdef UTEST_SERIAL_TC
+
+static rt_bool_t block_write(rt_device_t uart_dev)
+{
+    rt_size_t i, wr_sz, index, write_num_array[UART_TEST_NUMBER], total_write_num[UART_TEST_NUMBER];
+    rt_tick_t tick1, tick2, tick_array[UART_TEST_NUMBER];
+    rt_uint8_t uart_write_buffer[1024];
+
+    for (i = 0; i < 1024; i++)
+        uart_write_buffer[i] = '0' + (i % 49);
+
+    /* make sure device is closed and reopen it */
+    while(rt_device_close(uart_dev) != -RT_ERROR);
+    rt_device_open(uart_dev, RT_DEVICE_FLAG_TX_BLOCKING);
+
+    LOG_D("\nBLOCKING WRITE BEGIN\n");
+    rt_thread_mdelay(2000);
+
+    index = 0;
+    wr_sz = 0;
+    tick1 = rt_tick_get();
+    for(i = 0; i < UART_SEND_TIMES; i++)
+        wr_sz += rt_device_write(uart_dev, 0, uart_write_buffer, 1024);
+
+    tick2 = rt_tick_get();
+    total_write_num[index] = UART_SEND_TIMES * 1024;
+    tick_array[index] = tick2 - tick1;
+    write_num_array[index++] = wr_sz;
+
+    wr_sz = 0;
+    tick1 = rt_tick_get();
+    wr_sz += rt_device_write(uart_dev, 0, uart_write_buffer, 8);
+    tick2 = rt_tick_get();
+    total_write_num[index] = 8;
+    tick_array[index] = tick2 - tick1;
+    write_num_array[index++] = wr_sz;
+
+    wr_sz = 0;
+    tick1 = rt_tick_get();
+    wr_sz += rt_device_write(uart_dev, 0, uart_write_buffer, 32);
+    tick2 = rt_tick_get();
+    total_write_num[index] = 32;
+    tick_array[index] = tick2 - tick1;
+    write_num_array[index++] = wr_sz;
+
+    wr_sz = 0;
+    tick1 = rt_tick_get();
+    wr_sz += rt_device_write(uart_dev, 0, uart_write_buffer, 128);
+    tick2 = rt_tick_get();
+    total_write_num[index] = 128;
+    tick_array[index] = tick2 - tick1;
+    write_num_array[index++] = wr_sz;
+
+    wr_sz = 0;
+    tick1 = rt_tick_get();
+    wr_sz += rt_device_write(uart_dev, 0, uart_write_buffer, 512);
+    tick2 = rt_tick_get();
+    total_write_num[index] = 512;
+    tick_array[index] = tick2 - tick1;
+    write_num_array[index++] = wr_sz;
+
+    wr_sz = 0;
+    tick1 = rt_tick_get();
+    wr_sz += rt_device_write(uart_dev, 0, uart_write_buffer, 1024);
+    tick2 = rt_tick_get();
+    total_write_num[index] = 1024;
+    tick_array[index] = tick2 - tick1;
+    write_num_array[index++] = wr_sz;
+
+    rt_thread_mdelay(1000);
+    LOG_D("\nBLOCKING_TX END\n");
+    for(i = 0; i < index; i++)
+    {
+        LOG_D("\nBLOCKING_MODE : write %d / %d bytes in %d ticks\n", write_num_array[i], total_write_num[i], tick_array[i]);
+        rt_thread_mdelay(1000);
+    }
+
+    return RT_TRUE;
+}
+
+static void uart_test_blocking_tx(void)
+{
+    rt_device_t uart_dev;
+    uart_dev = rt_device_find(SERIAL_UART_NAME);
+    uassert_not_null(uart_dev);
+
+    uassert_true (block_write(uart_dev));
+}
+
+static rt_err_t utest_tc_init(void)
+{
+    return RT_EOK;
+}
+
+static rt_err_t utest_tc_cleanup(void)
+{
+    rt_device_t uart_dev;
+    uart_dev = rt_device_find(SERIAL_UART_NAME);
+    while(rt_device_close(uart_dev) != -RT_ERROR);
+    rt_device_open(uart_dev, RT_DEVICE_FLAG_TX_BLOCKING | RT_DEVICE_FLAG_TX_BLOCKING);
+    return RT_EOK;
+}
+
+static void testcase(void)
+{
+    UTEST_UNIT_RUN(uart_test_blocking_tx);
+}
+UTEST_TC_EXPORT(testcase, "uart_blocking_tx", utest_tc_init, utest_tc_cleanup, 10);
+
+#endif
diff --git a/examples/utest/testcases/drivers/serial_v2/uart_nonblocking_rx.c b/examples/utest/testcases/drivers/serial_v2/uart_nonblocking_rx.c
new file mode 100644
index 0000000000..72b5e1e332
--- /dev/null
+++ b/examples/utest/testcases/drivers/serial_v2/uart_nonblocking_rx.c
@@ -0,0 +1,107 @@
+#include <rtthread.h>
+#include <rtdevice.h>
+#include "utest.h"
+
+#define SERIAL_UART_NAME "uart2"
+
+#ifdef UTEST_SERIAL_TC
+
+static rt_bool_t nonblock_read(rt_device_t uart_dev)
+{
+    rt_size_t total_length, recv_length;
+    rt_uint8_t uart_read_buffer[1024], log_buffer[64];
+
+    /* make sure device is closed and reopen it */
+    while(rt_device_close(uart_dev) != -RT_ERROR);
+    rt_device_open(uart_dev, RT_DEVICE_FLAG_TX_BLOCKING | RT_DEVICE_FLAG_RX_NON_BLOCKING);
+
+    rt_sprintf(log_buffer, "\nNONBLOCKING READ BEGIN, PLEASE SEND SOME DATAS\n");
+    rt_device_write(uart_dev, 0, log_buffer, rt_strlen(log_buffer));
+
+    total_length = 0;
+    rt_device_write(uart_dev, 0, "5\n", 2);
+    recv_length = 0;
+    recv_length = rt_device_read(uart_dev, -1, uart_read_buffer, 256);
+    rt_device_write(uart_dev,  0,  uart_read_buffer, 256);
+    total_length += recv_length;
+    rt_thread_mdelay(1000);
+
+    rt_sprintf(log_buffer, "\nnonblock : %d bytes read, total: %d \n", recv_length, total_length);
+    rt_device_write(uart_dev, 0, log_buffer, rt_strlen(log_buffer));
+
+    rt_device_write(uart_dev, 0, "4\n", 2);
+    recv_length = 0;
+    recv_length = rt_device_read(uart_dev, -1, uart_read_buffer, 256);
+    rt_device_write(uart_dev, 0, uart_read_buffer, 256);
+    total_length += recv_length;
+    rt_thread_mdelay(1000);
+
+    rt_sprintf(log_buffer,"\nnonblock : %d bytes read , total: %d \n", recv_length, total_length);
+    rt_device_write(uart_dev,0,log_buffer, rt_strlen(log_buffer));
+
+    rt_device_write(uart_dev, 0, "3\n", 2);
+    recv_length = 0;
+    recv_length = rt_device_read(uart_dev, -1, uart_read_buffer, 256);
+    rt_device_write(uart_dev, 0, uart_read_buffer, 256);
+    total_length += recv_length;
+    rt_thread_mdelay(1000);
+
+    rt_sprintf(log_buffer, "\nnonblock : %d bytes read, total: %d \n", recv_length, total_length);
+    rt_device_write(uart_dev,0,log_buffer, rt_strlen(log_buffer));
+
+    rt_device_write(uart_dev, 0, "2\n", 2);
+    recv_length = 0;
+    recv_length = rt_device_read(uart_dev, -1, uart_read_buffer, 128);
+    rt_device_write(uart_dev, 0, uart_read_buffer, 128);
+    total_length += recv_length;
+    rt_thread_mdelay(1000);
+
+    rt_sprintf(log_buffer,"\nnonblock : %d bytes read , total: %d \n", recv_length, total_length);
+    rt_device_write(uart_dev, 0, log_buffer, rt_strlen(log_buffer));
+
+    rt_device_write(uart_dev, 0, "1\n", 2);
+    recv_length = 0;
+    recv_length = rt_device_read(uart_dev, -1, uart_read_buffer, 128);
+    rt_device_write(uart_dev, 0, uart_read_buffer, 128);
+    total_length += recv_length;
+    rt_thread_mdelay(1000);
+
+    rt_sprintf(log_buffer, "\nnonblock : %d bytes read , total: %d \n", recv_length, total_length);
+    rt_device_write(uart_dev, 0, log_buffer, rt_strlen(log_buffer));
+
+    rt_sprintf(log_buffer, "BLOCKING READ END");
+    rt_device_write(uart_dev, 0, log_buffer, rt_strlen(log_buffer));
+
+    return RT_TRUE;
+}
+
+static void uart_test_nonblocking_rx(void)
+{
+    rt_device_t uart_dev;
+    uart_dev = rt_device_find(SERIAL_UART_NAME);
+    uassert_not_null(uart_dev);
+
+    uassert_true (nonblock_read(uart_dev));
+}
+
+static rt_err_t utest_tc_init(void)
+{
+    return RT_EOK;
+}
+
+static rt_err_t utest_tc_cleanup(void)
+{
+    rt_device_t uart_dev;
+    uart_dev = rt_device_find(SERIAL_UART_NAME);
+    while(rt_device_close(uart_dev) != -RT_ERROR);
+    rt_device_open(uart_dev, RT_DEVICE_FLAG_TX_BLOCKING | RT_DEVICE_FLAG_TX_BLOCKING);
+    return RT_EOK;
+}
+
+static void testcase(void)
+{
+    UTEST_UNIT_RUN(uart_test_nonblocking_rx);
+}
+UTEST_TC_EXPORT(testcase, "uart_nonblocking_rx", utest_tc_init, utest_tc_cleanup, 10);
+
+#endif
diff --git a/examples/utest/testcases/drivers/serial_v2/uart_nonblocking_tx.c b/examples/utest/testcases/drivers/serial_v2/uart_nonblocking_tx.c
new file mode 100644
index 0000000000..eb88abceb4
--- /dev/null
+++ b/examples/utest/testcases/drivers/serial_v2/uart_nonblocking_tx.c
@@ -0,0 +1,128 @@
+#include <rtthread.h>
+#include <rtdevice.h>
+#include "utest.h"
+
+#define SERIAL_UART_NAME "uart2"
+#define UART_SEND_TIMES 400
+#define UART_TEST_NUMBER 6
+
+#ifdef UTEST_SERIAL_TC
+
+static rt_bool_t nonblock_write(rt_device_t uart_dev)
+{
+    rt_size_t wr_sz = 0, tmp = 0, i, write_num_array[UART_TEST_NUMBER], total_write_num[UART_TEST_NUMBER], index;
+    rt_tick_t tick1, tick2, tick_array[UART_TEST_NUMBER];
+    rt_uint8_t uart_write_buffer[1024];
+
+    for (i = 0; i < 1024; i++)
+        uart_write_buffer[i] = '0' + (i % 50);
+
+    /* make sure device is closed and reopen it */
+    while(rt_device_close(uart_dev) != -RT_ERROR);
+    uart_dev = rt_device_find(SERIAL_UART_NAME);
+    rt_device_open(uart_dev, RT_DEVICE_FLAG_TX_NON_BLOCKING | RT_DEVICE_FLAG_RX_NON_BLOCKING);
+
+    LOG_D("\nNONBLOCKING WRITE BEGIN\n");
+    rt_thread_mdelay(2000);
+
+    index = 0;
+    tmp = 0;
+    tick1 = rt_tick_get();
+    for (i = 0; i < UART_SEND_TIMES; i++)
+    {
+        wr_sz = 0;
+        while(wr_sz < 1024)
+            wr_sz += rt_device_write(uart_dev, 0, &uart_write_buffer[wr_sz], 1024-wr_sz);
+        tmp += wr_sz;
+    }
+    tick2 = rt_tick_get();
+    total_write_num[index] = UART_SEND_TIMES * 1024;
+    tick_array[index] = tick2 - tick1;
+    write_num_array[index++] = tmp;
+
+    wr_sz = 0;
+    tick1 = rt_tick_get();
+    while(wr_sz < 8)
+        wr_sz += rt_device_write(uart_dev, 0, &uart_write_buffer[wr_sz], 8-wr_sz);
+    tick2 = rt_tick_get();
+    total_write_num[index] = 8;
+    tick_array[index] = tick2 - tick1;
+    write_num_array[index++] = wr_sz;
+
+    wr_sz = 0;
+    tick1 = rt_tick_get();
+    while(wr_sz < 32)
+        wr_sz += rt_device_write(uart_dev, 0, &uart_write_buffer[wr_sz], 32-wr_sz);
+    tick2 = rt_tick_get();
+    total_write_num[index] = 32;
+    tick_array[index] = tick2 - tick1;
+    write_num_array[index++] = wr_sz;
+
+    wr_sz = 0;
+    tick1 = rt_tick_get();
+    while(wr_sz < 128)
+        wr_sz += rt_device_write(uart_dev, 0, &uart_write_buffer[wr_sz], 128-wr_sz);
+    tick2 = rt_tick_get();
+    total_write_num[index] = 128;
+    tick_array[index] = tick2 - tick1;
+    write_num_array[index++] = wr_sz;
+
+    wr_sz = 0;
+    tick1 = rt_tick_get();
+    while(wr_sz < 512)
+        wr_sz += rt_device_write(uart_dev, 0, &uart_write_buffer[wr_sz], 512-wr_sz);
+    tick2 = rt_tick_get();
+    total_write_num[index] = 512;
+    tick_array[index] = tick2 - tick1;
+    write_num_array[index++] = wr_sz;
+
+    wr_sz = 0;
+    tick1 = rt_tick_get();
+    while(wr_sz < 1024)
+        wr_sz += rt_device_write(uart_dev, 0, &uart_write_buffer[wr_sz], 1024-wr_sz);
+    tick2 = rt_tick_get();
+    total_write_num[index] = 1024;
+    tick_array[index] = tick2 - tick1;
+    write_num_array[index++] = wr_sz;
+
+    rt_thread_mdelay(1000);
+    LOG_D("\nNONBLOCKING_TX END\n");
+    for(i = 0; i < index; i++)
+    {
+        LOG_D("\nNONBLOCKING_MODE : write %d / %d bytes in %d ticks\n", write_num_array[i], total_write_num[i], tick_array[i]);
+        rt_thread_mdelay(1000);
+    }
+
+    return RT_TRUE;
+}
+
+static void uart_test_nonblocking_tx(void)
+{
+    rt_device_t uart_dev;
+    uart_dev = rt_device_find(SERIAL_UART_NAME);
+    uassert_not_null(uart_dev);
+
+    uassert_true (nonblock_write(uart_dev));
+}
+
+static rt_err_t utest_tc_init(void)
+{
+    return RT_EOK;
+}
+
+static rt_err_t utest_tc_cleanup(void)
+{
+    rt_device_t uart_dev;
+    uart_dev = rt_device_find(SERIAL_UART_NAME);
+    while(rt_device_close(uart_dev) != -RT_ERROR);
+    rt_device_open(uart_dev, RT_DEVICE_FLAG_TX_BLOCKING | RT_DEVICE_FLAG_TX_BLOCKING);
+    return RT_EOK;
+}
+
+static void testcase(void)
+{
+    UTEST_UNIT_RUN(uart_test_nonblocking_tx);
+}
+UTEST_TC_EXPORT(testcase, "uart_nonblocking_tx", utest_tc_init, utest_tc_cleanup, 10);
+
+#endif