diff --git a/bsp/stm32/stm32l496-st-nucleo/applications/SConscript b/bsp/stm32/stm32l496-st-nucleo/applications/SConscript
index 27ddfc3b47..a868c92232 100644
--- a/bsp/stm32/stm32l496-st-nucleo/applications/SConscript
+++ b/bsp/stm32/stm32l496-st-nucleo/applications/SConscript
@@ -6,10 +6,6 @@ src = Split('''
 main.c
 ''')
 
-if GetDepend(['BSP_USING_USBD']):
-    if GetDepend(['RT_USB_DEVICE_CDC']):
-        src += ['uart_sample.c']
-
 CPPPATH = [str(Dir('#')), cwd]
 
 group = DefineGroup('Applications', src, depend = [''], CPPPATH = CPPPATH)
diff --git a/bsp/stm32/stm32l496-st-nucleo/applications/uart_sample.c b/bsp/stm32/stm32l496-st-nucleo/applications/uart_sample.c
deleted file mode 100644
index e87079e74e..0000000000
--- a/bsp/stm32/stm32l496-st-nucleo/applications/uart_sample.c
+++ /dev/null
@@ -1,101 +0,0 @@
-/*
- * Copyright (c) 2006-2018, RT-Thread Development Team
- *
- * SPDX-License-Identifier: Apache-2.0
- *
- * Change Logs:
- * Date           Author       Notes
- * 2018-08-15     misonyo      first implementation.
- */
-/*
- * 程序清单：这是一个 串口 设备使用例程
- * 例程导出了 uart_sample 命令到控制终端
- * 命令调用格式：uart_sample uart2
- * 命令解释：命令第二个参数是要使用的串口设备名称，为空则使用默认的串口设备
- * 程序功能：通过串口输出字符串"hello RT-Thread!"，然后错位输出输入的字符
-*/
-
-#include <rtthread.h>
-
-#define SAMPLE_UART_NAME       "vcom"      /* 串口设备名称 */
-
-/* 用于接收消息的信号量 */
-static struct rt_semaphore rx_sem;
-static rt_device_t serial;
-
-/* 接收数据回调函数 */
-static rt_err_t uart_input(rt_device_t dev, rt_size_t size)
-{
-    /* 串口接收到数据后产生中断，调用此回调函数，然后发送接收信号量 */
-    rt_sem_release(&rx_sem);
-
-    return RT_EOK;
-}
-
-static void serial_thread_entry(void *parameter)
-{
-    char ch;
-
-    while (1)
-    {
-        /* 从串口读取一个字节的数据，没有读取到则等待接收信号量 */
-        while (rt_device_read(serial, -1, &ch, 1) != 1)
-        {
-            /* 阻塞等待接收信号量，等到信号量后再次读取数据 */
-            rt_sem_take(&rx_sem, RT_WAITING_FOREVER);
-        }
-        /* 读取到的数据通过串口错位输出 */
-        ch = ch + 1;
-        rt_device_write(serial, 0, &ch, 1);
-    }
-}
-
-static int uart_sample(int argc, char *argv[])
-{
-    rt_err_t ret = RT_EOK;
-    char uart_name[RT_NAME_MAX];
-    char str[] = "hello RT-Thread!\r\n";
-
-    if (argc == 2)
-    {
-        rt_strncpy(uart_name, argv[1], RT_NAME_MAX);
-    }
-    else
-    {
-        rt_strncpy(uart_name, SAMPLE_UART_NAME, RT_NAME_MAX);
-    }
-
-    /* 查找串口设备 */
-    serial = rt_device_find(uart_name);
-    if (!serial)
-    {
-        rt_kprintf("find %s failed!\n", uart_name);
-        return RT_ERROR;
-    }
-
-    /* 初始化信号量 */
-    rt_sem_init(&rx_sem, "rx_sem", 0, RT_IPC_FLAG_FIFO);
-    /* 以中断接收及轮询发送方式打开串口设备 */
-    rt_device_open(serial, RT_DEVICE_FLAG_INT_RX);
-    //rt_device_open(serial, RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX);
-    /* 设置接收回调函数 */
-    rt_device_set_rx_indicate(serial, uart_input);
-    /* 发送字符串 */
-    rt_device_write(serial, 0, str, (sizeof(str) - 1));
-
-    /* 创建 serial 线程 */
-    rt_thread_t thread = rt_thread_create("serial", serial_thread_entry, RT_NULL, 1024, 25, 10);
-    /* 创建成功则启动线程 */
-    if (thread != RT_NULL)
-    {
-        rt_thread_startup(thread);
-    }
-    else
-    {
-        ret = RT_ERROR;
-    }
-
-    return ret;
-}
-/* 导出到 msh 命令列表中 */
-MSH_CMD_EXPORT(uart_sample, uart device sample);