diff --git a/components/shell/CMakeLists.txt b/components/shell/CMakeLists.txt
index 17860aec..a23cd9b3 100644
--- a/components/shell/CMakeLists.txt
+++ b/components/shell/CMakeLists.txt
@@ -1,3 +1,7 @@
 sdk_generate_library()
 sdk_library_add_sources(shell.c)
-sdk_add_include_directories(.)
\ No newline at end of file
+sdk_add_include_directories(.)
+
+if(CONFIG_FREERTOS)
+sdk_library_add_sources(shell_freertos.c)
+endif()
\ No newline at end of file
diff --git a/components/shell/shell.c b/components/shell/shell.c
index 007f5b63..7b911618 100644
--- a/components/shell/shell.c
+++ b/components/shell/shell.c
@@ -1,27 +1,24 @@
-/**
- * @file shell.c
- * @brief
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
  *
- * Copyright (c) 2021 Bouffalolab team
- *
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.  The
- * ASF licenses this file to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance with the
- * License.  You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
- * License for the specific language governing permissions and limitations
- * under the License.
+ * SPDX-License-Identifier: Apache-2.0
  *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2006-04-30     Bernard      the first version for FinSH
+ * 2006-05-08     Bernard      change finsh thread stack to 2048
+ * 2006-06-03     Bernard      add support for skyeye
+ * 2006-09-24     Bernard      remove the code related with hardware
+ * 2010-01-18     Bernard      fix down then up key bug.
+ * 2010-03-19     Bernard      fix backspace issue and fix device read in shell.
+ * 2010-04-01     Bernard      add prompt output when start and remove the empty history
+ * 2011-02-23     Bernard      fix variable section end issue of finsh shell
+ *                             initialization when use GNU GCC compiler.
+ * 2016-11-26     armink       add password authentication
+ * 2018-07-02     aozima       add custom prompt support.
  */
+
 #include "shell.h"
-#include <ctype.h>
 #if defined(SHELL_USING_FS)
 #include "ff.h"
 #endif
diff --git a/components/shell/shell.h b/components/shell/shell.h
index fe140325..f0df04d7 100644
--- a/components/shell/shell.h
+++ b/components/shell/shell.h
@@ -1,24 +1,11 @@
-/**
- * @file shell.h
- * @brief
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
  *
- * Copyright (c) 2021 Bouffalolab team
- *
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.  The
- * ASF licenses this file to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance with the
- * License.  You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
- * License for the specific language governing permissions and limitations
- * under the License.
+ * SPDX-License-Identifier: Apache-2.0
  *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2011-06-02     Bernard      Add finsh_get_prompt function declaration
  */
 #ifndef __SHELL_H__
 #define __SHELL_H__
diff --git a/components/shell/shell_config.h b/components/shell/shell_config.h
index b90536d2..090aefc7 100644
--- a/components/shell/shell_config.h
+++ b/components/shell/shell_config.h
@@ -28,4 +28,12 @@
 //#define SHELL_USING_FS
 //#define SHELL_USING_COLOR
 
+#ifndef SHELL_THREAD_STACK_SIZE
+#define SHELL_THREAD_STACK_SIZE 1024
+#endif
+
+#ifndef SHELL_THREAD_PRIO
+#define SHELL_THREAD_PRIO 5
+#endif
+
 #endif
\ No newline at end of file
diff --git a/components/shell/shell_freertos.c b/components/shell/shell_freertos.c
new file mode 100644
index 00000000..3d457bc1
--- /dev/null
+++ b/components/shell/shell_freertos.c
@@ -0,0 +1,71 @@
+#include "shell.h"
+#include <FreeRTOS.h>
+#include "semphr.h"
+#include "ring_buffer.h"
+#include "bflb_uart.h"
+
+static TaskHandle_t shell_handle;
+SemaphoreHandle_t sem_shell = NULL;
+
+Ring_Buffer_Type shell_rb;
+
+uint8_t shell_buffer[512];
+
+void shell_release_sem(void)
+{
+    BaseType_t xHigherPriorityTaskWoken = pdFALSE;
+
+    int ret = xSemaphoreGiveFromISR(sem_shell, &xHigherPriorityTaskWoken);
+    if (ret == pdPASS) {
+        portYIELD_FROM_ISR(xHigherPriorityTaskWoken);
+    }
+}
+
+static struct bflb_device_s *uart_shell;
+
+void uart_shell_isr(int irq, void *arg)
+{
+    uint32_t intstatus = bflb_uart_get_intstatus(uart_shell);
+    if (intstatus & UART_INTSTS_RX_FIFO) {
+        while (bflb_uart_rxavailable(uart_shell)) {
+            Ring_Buffer_Write_Byte(&shell_rb, bflb_uart_getchar(uart_shell));
+        }
+        shell_release_sem();
+    }
+    if (intstatus & UART_INTSTS_RTO) {
+        while (bflb_uart_rxavailable(uart_shell)) {
+            Ring_Buffer_Write_Byte(&shell_rb, bflb_uart_getchar(uart_shell));
+        }
+        shell_release_sem();
+        bflb_uart_int_clear(uart_shell, UART_INTCLR_RTO);
+    }
+}
+
+static void shell_task(void *pvParameters)
+{
+    uint8_t data;
+    uint32_t len;
+    while (1) {
+        if (xSemaphoreTake(sem_shell, portMAX_DELAY) == pdTRUE) {
+            len = Ring_Buffer_Get_Length(&shell_rb);
+            for (uint32_t i = 0; i < len; i++) {
+                Ring_Buffer_Read_Byte(&shell_rb, &data);
+                shell_handler(data);
+            }
+        }
+    }
+}
+
+void shell_init_with_task(struct bflb_device_s *shell)
+{
+    uart_shell = shell;
+    bflb_uart_rxint_mask(uart_shell, false);
+    bflb_irq_attach(uart_shell->irq_num, uart_shell_isr, NULL);
+    bflb_irq_enable(uart_shell->irq_num);
+
+    Ring_Buffer_Init(&shell_rb, shell_buffer, sizeof(shell_buffer), NULL, NULL);
+
+    shell_init();
+    vSemaphoreCreateBinary(sem_shell);
+    xTaskCreate(shell_task, (char *)"shell_task", SHELL_THREAD_STACK_SIZE, NULL, SHELL_THREAD_PRIO, &shell_handle);
+}
\ No newline at end of file
diff --git a/examples/shell/CMakeLists.txt b/examples/shell/shell_no_os/CMakeLists.txt
similarity index 87%
rename from examples/shell/CMakeLists.txt
rename to examples/shell/shell_no_os/CMakeLists.txt
index c3159783..b4760fe2 100644
--- a/examples/shell/CMakeLists.txt
+++ b/examples/shell/shell_no_os/CMakeLists.txt
@@ -6,4 +6,4 @@ find_package(bouffalo_sdk REQUIRED HINTS $ENV{BL_SDK_BASE})
 
 sdk_set_main_file(main.c)
 
-project(shell)
+project(shell_no_os)
diff --git a/examples/shell/Makefile b/examples/shell/shell_no_os/Makefile
similarity index 83%
rename from examples/shell/Makefile
rename to examples/shell/shell_no_os/Makefile
index 34b2f3fa..9b01b7fe 100644
--- a/examples/shell/Makefile
+++ b/examples/shell/shell_no_os/Makefile
@@ -1,5 +1,5 @@
 SDK_DEMO_PATH ?= .
-BL_SDK_BASE ?= $(SDK_DEMO_PATH)/../..
+BL_SDK_BASE ?= $(SDK_DEMO_PATH)/../../..
 
 export BL_SDK_BASE
 
diff --git a/examples/shell/main.c b/examples/shell/shell_no_os/main.c
similarity index 86%
rename from examples/shell/main.c
rename to examples/shell/shell_no_os/main.c
index 7c75c637..045d323b 100644
--- a/examples/shell/main.c
+++ b/examples/shell/shell_no_os/main.c
@@ -1,8 +1,7 @@
 #include "bflb_mtimer.h"
 #include "bflb_uart.h"
 #include "shell.h"
-
-extern void board_init(void);
+#include "board.h"
 
 static struct bflb_device_s *uart0;
 
@@ -24,6 +23,7 @@ void uart_isr(int irq, void *arg)
 
 int main(void)
 {
+    int ch;
     board_init();
     uart0 = bflb_device_get_by_name("uart0");
     bflb_uart_rxint_mask(uart0, false);
@@ -31,5 +31,9 @@ int main(void)
     bflb_irq_enable(uart0->irq_num);
     shell_init();
     while (1) {
+        if((ch = bflb_uart_getchar(uart0)) != -1)
+        {
+            shell_handler(ch);
+        }
     }
 }
diff --git a/examples/shell/proj.conf b/examples/shell/shell_no_os/proj.conf
similarity index 100%
rename from examples/shell/proj.conf
rename to examples/shell/shell_no_os/proj.conf
diff --git a/examples/shell/shell_os/CMakeLists.txt b/examples/shell/shell_os/CMakeLists.txt
new file mode 100644
index 00000000..bb931591
--- /dev/null
+++ b/examples/shell/shell_os/CMakeLists.txt
@@ -0,0 +1,11 @@
+cmake_minimum_required(VERSION 3.15)
+
+include(proj.conf)
+
+find_package(bouffalo_sdk REQUIRED HINTS $ENV{BL_SDK_BASE})
+
+sdk_add_include_directories(.)
+
+sdk_set_main_file(main.c)
+
+project(shell_os)
diff --git a/examples/shell/shell_os/FreeRTOSConfig.h b/examples/shell/shell_os/FreeRTOSConfig.h
new file mode 100644
index 00000000..6b521a6a
--- /dev/null
+++ b/examples/shell/shell_os/FreeRTOSConfig.h
@@ -0,0 +1,127 @@
+/*
+ * FreeRTOS Kernel V10.2.1
+ * Copyright (C) 2019 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * http://www.FreeRTOS.org
+ * http://aws.amazon.com/freertos
+ *
+ * 1 tab == 4 spaces!
+ */
+
+#ifndef FREERTOS_CONFIG_H
+#define FREERTOS_CONFIG_H
+
+/*-----------------------------------------------------------
+ * Application specific definitions.
+ *
+ * These definitions should be adjusted for your particular hardware and
+ * application requirements.
+ *
+ * THESE PARAMETERS ARE DESCRIBED WITHIN THE 'CONFIGURATION' SECTION OF THE
+ * FreeRTOS API DOCUMENTATION AVAILABLE ON THE FreeRTOS.org WEB SITE.
+ *
+ * See http://www.freertos.org/a00110.html.
+ *----------------------------------------------------------*/
+#include "stdio.h"
+
+#ifdef BL702
+#define configMTIME_BASE_ADDRESS    (0x02000000UL + 0xBFF8UL)
+#define configMTIMECMP_BASE_ADDRESS (0x02000000UL + 0x4000UL)
+#else
+#define configMTIME_BASE_ADDRESS    (0xE0000000UL + 0xBFF8UL)
+#define configMTIMECMP_BASE_ADDRESS (0xE0000000UL + 0x4000UL)
+#endif
+
+// #define configSUPPORT_STATIC_ALLOCATION         1
+#define configUSE_PREEMPTION                    1
+#define configUSE_IDLE_HOOK                     0
+#define configUSE_TICK_HOOK                     0
+#define configCPU_CLOCK_HZ                      ((uint32_t)(1 * 1000 * 1000))
+#define configTICK_RATE_HZ                      ((TickType_t)1000)
+#define configMAX_PRIORITIES                    (7)
+#define configMINIMAL_STACK_SIZE                ((unsigned short)128) /* Only needs to be this high as some demo tasks also use this constant.  In production only the idle task would use this. */
+#define configTOTAL_HEAP_SIZE                   ((size_t)12 * 1024)
+#define configMAX_TASK_NAME_LEN                 (16)
+#define configUSE_TRACE_FACILITY                1
+#define configUSE_STATS_FORMATTING_FUNCTIONS    1
+#define configUSE_16_BIT_TICKS                  0
+#define configIDLE_SHOULD_YIELD                 0
+#define configUSE_MUTEXES                       1
+#define configQUEUE_REGISTRY_SIZE               8
+#define configCHECK_FOR_STACK_OVERFLOW          2
+#define configUSE_RECURSIVE_MUTEXES             1
+#define configUSE_MALLOC_FAILED_HOOK            1
+#define configUSE_APPLICATION_TASK_TAG          0
+#define configUSE_COUNTING_SEMAPHORES           1
+#define configGENERATE_RUN_TIME_STATS           0
+#define configUSE_PORT_OPTIMISED_TASK_SELECTION 1
+#define configUSE_TICKLESS_IDLE                 0
+
+/* Co-routine definitions. */
+#define configUSE_CO_ROUTINES           0
+#define configMAX_CO_ROUTINE_PRIORITIES (2)
+
+/* Software timer definitions. */
+#define configUSE_TIMERS             1
+#define configTIMER_TASK_PRIORITY    (configMAX_PRIORITIES - 1)
+#define configTIMER_QUEUE_LENGTH     4
+#define configTIMER_TASK_STACK_DEPTH (configMINIMAL_STACK_SIZE)
+
+/* Task priorities.  Allow these to be overridden. */
+#ifndef uartPRIMARY_PRIORITY
+#define uartPRIMARY_PRIORITY (configMAX_PRIORITIES - 3)
+#endif
+
+/* Set the following definitions to 1 to include the API function, or zero
+to exclude the API function. */
+#define INCLUDE_vTaskPrioritySet         1
+#define INCLUDE_uxTaskPriorityGet        1
+#define INCLUDE_vTaskDelete              1
+#define INCLUDE_vTaskCleanUpResources    1
+#define INCLUDE_vTaskSuspend             1
+#define INCLUDE_vTaskDelayUntil          1
+#define INCLUDE_vTaskDelay               1
+#define INCLUDE_eTaskGetState            1
+#define INCLUDE_xTimerPendFunctionCall   1
+#define INCLUDE_xTaskAbortDelay          1
+#define INCLUDE_xTaskGetHandle           1
+#define INCLUDE_xSemaphoreGetMutexHolder 1
+
+/* Normal assert() semantics without relying on the provision of an assert.h
+header file. */
+void vApplicationMallocFailedHook(void);
+void vAssertCalled(void);
+#define configASSERT(x)                        \
+    if ((x) == 0) {                            \
+        printf("file [%s]\r\n", __FILE__);     \
+        printf("func [%s]\r\n", __FUNCTION__); \
+        printf("line [%d]\r\n", __LINE__);     \
+        printf("%s\r\n", (const char *)(#x));  \
+        vAssertCalled();                       \
+    }
+
+#if (configUSE_TICKLESS_IDLE != 0)
+void vApplicationSleep(uint32_t xExpectedIdleTime);
+#define portSUPPRESS_TICKS_AND_SLEEP(xExpectedIdleTime) vApplicationSleep(xExpectedIdleTime)
+#endif
+
+// #define portUSING_MPU_WRAPPERS
+
+#endif /* FREERTOS_CONFIG_H */
diff --git a/examples/shell/shell_os/Makefile b/examples/shell/shell_os/Makefile
new file mode 100644
index 00000000..9b01b7fe
--- /dev/null
+++ b/examples/shell/shell_os/Makefile
@@ -0,0 +1,13 @@
+SDK_DEMO_PATH ?= .
+BL_SDK_BASE ?= $(SDK_DEMO_PATH)/../../..
+
+export BL_SDK_BASE
+
+CHIP ?= bl616
+BOARD ?= bl616dk
+CROSS_COMPILE ?= riscv64-unknown-elf-
+
+# add custom cmake definition
+#cmake_definition+=-Dxxx=sss
+
+include $(BL_SDK_BASE)/project.build
diff --git a/examples/shell/shell_os/main.c b/examples/shell/shell_os/main.c
new file mode 100644
index 00000000..87584bc8
--- /dev/null
+++ b/examples/shell/shell_os/main.c
@@ -0,0 +1,35 @@
+#include "bflb_mtimer.h"
+#include "bflb_uart.h"
+#include "shell.h"
+#include <FreeRTOS.h>
+#include "semphr.h"
+#include "board.h"
+
+static uint8_t freertos_heap[configTOTAL_HEAP_SIZE];
+
+static HeapRegion_t xHeapRegions[] = {
+    { (uint8_t *)freertos_heap, 0 },
+    { NULL, 0 }, /* Terminates the array. */
+    { NULL, 0 }  /* Terminates the array. */
+};
+
+static struct bflb_device_s *uart0;
+
+extern void shell_init_with_task(struct bflb_device_s *shell);
+
+int main(void)
+{
+    board_init();
+    xHeapRegions[0].xSizeInBytes = configTOTAL_HEAP_SIZE;
+    vPortDefineHeapRegions(xHeapRegions);
+
+    configASSERT((configMAX_PRIORITIES > 4));
+
+    uart0 = bflb_device_get_by_name("uart0");
+    shell_init_with_task(uart0);
+
+    vTaskStartScheduler();
+
+    while (1) {
+    }
+}
diff --git a/examples/shell/shell_os/proj.conf b/examples/shell/shell_os/proj.conf
new file mode 100644
index 00000000..9aa717c8
--- /dev/null
+++ b/examples/shell/shell_os/proj.conf
@@ -0,0 +1,4 @@
+set(CONFIG_VLIBC 0)
+set(CONFIG_BFLOG 0)
+set(CONFIG_FREERTOS 1)
+set(CONFIG_SHELL 1)
\ No newline at end of file