diff --git a/components/shell/CMakeLists.txt b/components/shell/CMakeLists.txt
index 5d96f8f6..3a23c215 100644
--- a/components/shell/CMakeLists.txt
+++ b/components/shell/CMakeLists.txt
@@ -1,7 +1,6 @@
 ################# Add global include #################
 list(APPEND ADD_INCLUDE 
 "${CMAKE_CURRENT_SOURCE_DIR}"
-
 )
 #######################################################
 
@@ -16,7 +15,6 @@ file(GLOB_RECURSE sources
 "${CMAKE_CURRENT_SOURCE_DIR}/*.c")
 #aux_source_directory(. sources)
 list(APPEND ADD_SRCS  ${sources})
-#list(REMOVE_ITEM ADD_SRCS "${CMAKE_CURRENT_SOURCE_DIR}/libc/src/strtox.c" "${CMAKE_CURRENT_SOURCE_DIR}/libc/src/atox.c")
 #######################################################
 
 ########### Add required/dependent components #########
diff --git a/components/shell/shell.c b/components/shell/shell.c
new file mode 100644
index 00000000..c983c75b
--- /dev/null
+++ b/components/shell/shell.c
@@ -0,0 +1,781 @@
+/**
+ * @file shell.c
+ * @brief 
+ * 
+ * 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.
+ * 
+ */
+#include "shell.h"
+
+struct shell_syscall *_syscall_table_begin = NULL;
+struct shell_syscall *_syscall_table_end = NULL;
+struct shell_sysvar *_sysvar_table_begin = NULL;
+struct shell_sysvar *_sysvar_table_end = NULL;
+
+struct shell _shell;
+static struct shell *shell;
+
+int shell_help(int argc, char **argv)
+{
+    SHELL_PRINTF("shell commands list:\r\n");
+    {
+        struct shell_syscall *index;
+
+        for (index = _syscall_table_begin; index < _syscall_table_end; index++) {
+            if (strncmp(index->name, "__cmd_", 6) != 0) {
+                continue;
+            }
+
+#if defined(SHELL_USING_DESCRIPTION)
+            SHELL_PRINTF("%-16s - %s\r\n", &index->name[6], index->desc);
+#else
+            SHELL_PRINTF("%s\r\n", &index->name[6]);
+#endif
+        }
+    }
+    SHELL_PRINTF("\r\n");
+
+    return 0;
+}
+SHELL_CMD_EXPORT_ALIAS(shell_help, help, shell help.);
+
+static char *shell_get_prompt(void)
+{
+    static char shell_prompt[SHELL_CONSOLEBUF_SIZE + 1] = { 0 };
+
+    strcpy(shell_prompt, SHELL_NAME);
+
+#if defined(SHELL_USING_FS)
+    /* get current working directory */
+    getcwd(&shell_prompt[strlen(shell_prompt)],
+           SHELL_CONSOLEBUF_SIZE - strlen(shell_prompt));
+#endif
+
+    strcat(shell_prompt, "/>");
+
+    return shell_prompt;
+}
+
+static int str_common(const char *str1, const char *str2)
+{
+    const char *str = str1;
+
+    while ((*str != 0) && (*str2 != 0) && (*str == *str2)) {
+        str++;
+        str2++;
+    }
+
+    return (str - str1);
+}
+
+static void shell_handle_history(struct shell *shell)
+{
+    SHELL_PRINTF("\033[2K\r");
+    SHELL_PRINTF("%s%s", shell_get_prompt(), shell->line);
+}
+
+static void shell_push_history(struct shell *shell)
+{
+    if (shell->line_position != 0) {
+        /* push history */
+        if (shell->history_count >= SHELL_HISTORY_LINES) {
+            /* if current cmd is same as last cmd, don't push */
+            if (memcmp(&shell->cmd_history[SHELL_HISTORY_LINES - 1], shell->line,
+                       SHELL_CMD_SIZE)) {
+                /* move history */
+                int index;
+
+                for (index = 0; index < SHELL_HISTORY_LINES - 1; index++) {
+                    memcpy(&shell->cmd_history[index][0],
+                           &shell->cmd_history[index + 1][0], SHELL_CMD_SIZE);
+                }
+
+                memset(&shell->cmd_history[index][0], 0, SHELL_CMD_SIZE);
+                memcpy(&shell->cmd_history[index][0], shell->line,
+                       shell->line_position);
+
+                /* it's the maximum history */
+                shell->history_count = SHELL_HISTORY_LINES;
+            }
+        } else {
+            /* if current cmd is same as last cmd, don't push */
+            if (shell->history_count == 0 ||
+                memcmp(&shell->cmd_history[shell->history_count - 1], shell->line,
+                       SHELL_CMD_SIZE)) {
+                shell->current_history = shell->history_count;
+                memset(&shell->cmd_history[shell->history_count][0], 0, SHELL_CMD_SIZE);
+                memcpy(&shell->cmd_history[shell->history_count][0], shell->line,
+                       shell->line_position);
+
+                /* increase count and set current history position */
+                shell->history_count++;
+            }
+        }
+    }
+
+    shell->current_history = shell->history_count;
+}
+
+#ifdef SHELL_USING_FS
+
+void shell_auto_complete_path(char *path)
+{
+    DIR *dir = RT_NULL;
+    struct dirent *dirent = RT_NULL;
+    char *full_path, *ptr, *index;
+
+    if (!path)
+        return;
+
+    full_path = (char *)rt_malloc(256);
+    if (full_path == RT_NULL)
+        return; /* out of memory */
+
+    if (*path != '/') {
+        getcwd(full_path, 256);
+        if (full_path[rt_strlen(full_path) - 1] != '/')
+            strcat(full_path, "/");
+    } else
+        *full_path = '\0';
+
+    index = RT_NULL;
+    ptr = path;
+    for (;;) {
+        if (*ptr == '/')
+            index = ptr + 1;
+        if (!*ptr)
+            break;
+
+        ptr++;
+    }
+    if (index == RT_NULL)
+        index = path;
+
+    if (index != RT_NULL) {
+        char *dest = index;
+
+        /* fill the parent path */
+        ptr = full_path;
+        while (*ptr)
+            ptr++;
+
+        for (index = path; index != dest;)
+            *ptr++ = *index++;
+        *ptr = '\0';
+
+        dir = opendir(full_path);
+        if (dir == RT_NULL) /* open directory failed! */
+        {
+            rt_free(full_path);
+            return;
+        }
+
+        /* restore the index position */
+        index = dest;
+    }
+
+    /* auto complete the file or directory name */
+    if (*index == '\0') /* display all of files and directories */
+    {
+        for (;;) {
+            dirent = readdir(dir);
+            if (dirent == RT_NULL)
+                break;
+
+            SHELL_PRINTF("%s\n", dirent->d_name);
+        }
+    } else {
+        rt_size_t length, min_length;
+
+        min_length = 0;
+        for (;;) {
+            dirent = readdir(dir);
+            if (dirent == RT_NULL)
+                break;
+
+            /* matched the prefix string */
+            if (strncmp(index, dirent->d_name, rt_strlen(index)) == 0) {
+                if (min_length == 0) {
+                    min_length = rt_strlen(dirent->d_name);
+                    /* save dirent name */
+                    strcpy(full_path, dirent->d_name);
+                }
+
+                length = str_common(dirent->d_name, full_path);
+
+                if (length < min_length) {
+                    min_length = length;
+                }
+            }
+        }
+
+        if (min_length) {
+            if (min_length < rt_strlen(full_path)) {
+                /* list the candidate */
+                rewinddir(dir);
+
+                for (;;) {
+                    dirent = readdir(dir);
+                    if (dirent == RT_NULL)
+                        break;
+
+                    if (strncmp(index, dirent->d_name, rt_strlen(index)) == 0)
+                        SHELL_PRINTF("%s\n", dirent->d_name);
+                }
+            }
+
+            length = index - path;
+            memcpy(index, full_path, min_length);
+            path[length + min_length] = '\0';
+        }
+    }
+
+    closedir(dir);
+    rt_free(full_path);
+}
+#endif
+
+static void shell_auto_complete(char *prefix)
+{
+    int length, min_length;
+    const char *name_ptr, *cmd_name;
+    struct shell_syscall *index;
+
+    min_length = 0;
+    name_ptr = NULL;
+
+    SHELL_PRINTF("\r\n");
+
+    if (*prefix == '\0') {
+        shell_help(0, NULL);
+        return;
+    }
+
+#ifdef SHELL_USING_FS
+    /* check whether a spare in the command */
+    {
+        char *ptr;
+
+        ptr = prefix + strlen(prefix);
+
+        while (ptr != prefix) {
+            if (*ptr == ' ') {
+                shell_auto_complete_path(ptr + 1);
+                break;
+            }
+
+            ptr--;
+        }
+    }
+#endif
+
+    /* checks in internal command */
+    {
+        for (index = _syscall_table_begin; index < _syscall_table_end; index++) {
+            /* skip finsh shell function */
+            if (strncmp(index->name, "__cmd_", 6) != 0) {
+                continue;
+            }
+
+            cmd_name = (const char *)&index->name[6];
+
+            if (strncmp(prefix, cmd_name, strlen(prefix)) == 0) {
+                if (min_length == 0) {
+                    /* set name_ptr */
+                    name_ptr = cmd_name;
+                    /* set initial length */
+                    min_length = strlen(name_ptr);
+                }
+
+                length = str_common(name_ptr, cmd_name);
+
+                if (length < min_length) {
+                    min_length = length;
+                }
+
+                SHELL_PRINTF("%s\r\n", cmd_name);
+            }
+        }
+    }
+
+    /* auto complete string */
+    if (name_ptr != NULL) {
+        strncpy(prefix, name_ptr, min_length);
+    }
+
+    SHELL_PRINTF("%s%s", shell_get_prompt(), prefix);
+    return;
+}
+
+static int shell_split(char *cmd, uint32_t length, char *argv[SHELL_ARG_NUM])
+{
+    char *ptr;
+    uint32_t position;
+    uint32_t argc;
+    uint32_t i;
+
+    ptr = cmd;
+    position = 0;
+    argc = 0;
+
+    while (position < length) {
+        /* strip bank and tab */
+        while ((*ptr == ' ' || *ptr == '\t') && position < length) {
+            *ptr = '\0';
+            ptr++;
+            position++;
+        }
+
+        if (argc >= SHELL_ARG_NUM) {
+            SHELL_PRINTF("Too many args ! We only Use:\n");
+
+            for (i = 0; i < argc; i++) {
+                SHELL_PRINTF("%s ", argv[i]);
+            }
+
+            SHELL_PRINTF("\r\n");
+            break;
+        }
+
+        if (position >= length) {
+            break;
+        }
+
+        /* handle string */
+        if (*ptr == '"') {
+            ptr++;
+            position++;
+            argv[argc] = ptr;
+            argc++;
+
+            /* skip this string */
+            while (*ptr != '"' && position < length) {
+                if (*ptr == '\\') {
+                    if (*(ptr + 1) == '"') {
+                        ptr++;
+                        position++;
+                    }
+                }
+
+                ptr++;
+                position++;
+            }
+
+            if (position >= length) {
+                break;
+            }
+
+            /* skip '"' */
+            *ptr = '\0';
+            ptr++;
+            position++;
+        } else {
+            argv[argc] = ptr;
+            argc++;
+
+            while ((*ptr != ' ' && *ptr != '\t') && position < length) {
+                ptr++;
+                position++;
+            }
+
+            if (position >= length) {
+                break;
+            }
+        }
+    }
+
+    return argc;
+}
+
+static cmd_function_t shell_get_cmd(char *cmd, int size)
+{
+    struct shell_syscall *index;
+    cmd_function_t cmd_func = NULL;
+
+    for (index = _syscall_table_begin; index < _syscall_table_end; index++) {
+        if (strncmp(index->name, "__cmd_", 6) != 0) {
+            continue;
+        }
+
+        if (strncmp(&index->name[6], cmd, size) == 0 &&
+            index->name[6 + size] == '\0') {
+            cmd_func = (cmd_function_t)index->func;
+            break;
+        }
+    }
+
+    return cmd_func;
+}
+
+static int shell_exec_cmd(char *cmd, uint32_t length, int *retp)
+{
+    int argc;
+    uint32_t cmd0_size = 0;
+    cmd_function_t cmd_func;
+    char *argv[SHELL_ARG_NUM];
+
+    // ASSERT(cmd);
+    // ASSERT(retp);
+
+    /* find the size of first command */
+    while ((cmd[cmd0_size] != ' ' && cmd[cmd0_size] != '\t') &&
+           cmd0_size < length) {
+        cmd0_size++;
+    }
+
+    if (cmd0_size == 0) {
+        return -1;
+    }
+
+    cmd_func = shell_get_cmd(cmd, cmd0_size);
+
+    if (cmd_func == NULL) {
+        return -1;
+    }
+
+    /* split arguments */
+    memset(argv, 0x00, sizeof(argv));
+    argc = shell_split(cmd, length, argv);
+
+    if (argc == 0) {
+        return -1;
+    }
+
+    /* exec this command */
+    *retp = cmd_func(argc, argv);
+    return 0;
+}
+
+#if defined(SHELL_USING_LWIP) && defined(SHELL_USING_FS)
+static int shell_exec_lwp(char *cmd, uint32_t length)
+{
+    int argc;
+    int cmd0_size = 0;
+    char *argv[SHELL_ARG_NUM];
+    int fd = -1;
+    char *pg_name;
+
+    extern int exec(char *, int, char **);
+
+    /* find the size of first command */
+    while ((cmd[cmd0_size] != ' ' && cmd[cmd0_size] != '\t') &&
+           cmd0_size < length) {
+        cmd0_size++;
+    }
+
+    if (cmd0_size == 0) {
+        return -1;
+    }
+
+    /* split arguments */
+    rt_memset(argv, 0x00, sizeof(argv));
+    argc = msh_split(cmd, length, argv);
+
+    if (argc == 0) {
+        return -1;
+    }
+
+    pg_name = argv[0];
+    /* try to open program */
+    fd = open(pg_name, O_RDONLY, 0);
+
+    if (fd < 0) {
+        return -1;
+    }
+
+    /* found program */
+    close(fd);
+    exec(pg_name, argc, argv);
+
+    return 0;
+}
+#endif
+
+int shell_exec(char *cmd, uint32_t length)
+{
+    int cmd_ret;
+
+    /* strim the beginning of command */
+    while (*cmd == ' ' || *cmd == '\t') {
+        cmd++;
+        length--;
+    }
+
+    if (length == 0) {
+        return 0;
+    }
+
+    /* Exec sequence:
+   * 1. built-in command
+   * 2. module(if enabled)
+   */
+    if (shell_exec_cmd(cmd, length, &cmd_ret) == 0) {
+        return cmd_ret;
+    }
+
+#ifdef SHELL_USING_FS
+    extern int shell_exec_script(char *cmd, uint32_t length);
+
+    if (shell_exec_script(cmd, length) == 0) {
+        return 0;
+    }
+
+#endif
+
+#ifdef SHELL_USING_LWIP
+
+    if (shell_exec_lwp(cmd, length) == 0) {
+        return 0;
+    }
+
+#endif
+
+    /* truncate the cmd at the first space. */
+    {
+        char *tcmd;
+        tcmd = cmd;
+
+        while (*tcmd != ' ' && *tcmd != '\0') {
+            tcmd++;
+        }
+
+        *tcmd = '\0';
+    }
+    SHELL_PRINTF("%s: command not found.\r\n", cmd);
+    return -1;
+}
+
+void shell_handler(uint8_t data)
+{
+    /*
+   * handle control key
+   * up key  : 0x1b 0x5b 0x41
+   * down key: 0x1b 0x5b 0x42
+   * right key:0x1b 0x5b 0x43
+   * left key: 0x1b 0x5b 0x44
+   */
+    if (data == 0x1b) {
+        shell->stat = WAIT_SPEC_KEY;
+        return;
+    } else if (shell->stat == WAIT_SPEC_KEY) {
+        if (data == 0x5b) {
+            shell->stat = WAIT_FUNC_KEY;
+            return;
+        }
+
+        shell->stat = WAIT_NORMAL;
+    } else if (shell->stat == WAIT_FUNC_KEY) {
+        shell->stat = WAIT_NORMAL;
+
+        if (data == 0x41) /* up key */
+        {
+            /* prev history */
+            if (shell->current_history > 0) {
+                shell->current_history--;
+            } else {
+                shell->current_history = 0;
+                return;
+            }
+
+            /* copy the history command */
+            memcpy(shell->line, &shell->cmd_history[shell->current_history][0],
+                   SHELL_CMD_SIZE);
+            shell->line_curpos = shell->line_position = strlen(shell->line);
+            shell_handle_history(shell);
+
+            return;
+        } else if (data == 0x42) /* down key */
+        {
+            /* next history */
+            if (shell->current_history < shell->history_count - 1) {
+                shell->current_history++;
+            } else {
+                /* set to the end of history */
+                if (shell->history_count != 0) {
+                    shell->current_history = shell->history_count - 1;
+                } else {
+                    return;
+                }
+            }
+
+            memcpy(shell->line, &shell->cmd_history[shell->current_history][0],
+                   SHELL_CMD_SIZE);
+            shell->line_curpos = shell->line_position = strlen(shell->line);
+            shell_handle_history(shell);
+
+            return;
+        } else if (data == 0x44) /* left key */
+        {
+            if (shell->line_curpos) {
+                SHELL_PRINTF("\b");
+                shell->line_curpos--;
+            }
+
+            return;
+        } else if (data == 0x43) /* right key */
+        {
+            if (shell->line_curpos < shell->line_position) {
+                SHELL_PRINTF("%c", shell->line[shell->line_curpos]);
+                shell->line_curpos++;
+            }
+
+            return;
+        }
+    }
+
+    /* received null or error */
+    if (data == '\0' || data == 0xFF) {
+        return;
+    }
+    /* handle tab key */
+    else if (data == '\t') {
+        int i;
+
+        /* move the cursor to the beginning of line */
+        for (i = 0; i < shell->line_curpos; i++) {
+            SHELL_PRINTF("\b");
+        }
+
+        /* auto complete */
+        shell_auto_complete(&shell->line[0]);
+        /* re-calculate position */
+        shell->line_curpos = shell->line_position = strlen(shell->line);
+
+        return;
+    }
+    /* handle backspace key */
+    else if (data == 0x7f || data == 0x08) {
+        /* note that shell->line_curpos >= 0 */
+        if (shell->line_curpos == 0) {
+            return;
+        }
+
+        shell->line_position--;
+        shell->line_curpos--;
+
+        if (shell->line_position > shell->line_curpos) {
+            int i;
+
+            memmove(&shell->line[shell->line_curpos],
+                    &shell->line[shell->line_curpos + 1],
+                    shell->line_position - shell->line_curpos);
+            shell->line[shell->line_position] = 0;
+
+            SHELL_PRINTF("\b%s  \b", &shell->line[shell->line_curpos]);
+
+            /* move the cursor to the origin position */
+            for (i = shell->line_curpos; i <= shell->line_position; i++) {
+                SHELL_PRINTF("\b");
+            }
+        } else {
+            SHELL_PRINTF("\b \b");
+            shell->line[shell->line_position] = 0;
+        }
+
+        return;
+    }
+
+    /* handle end of line, break */
+    if (data == '\r' || data == '\n') {
+        shell_push_history(shell);
+
+        SHELL_PRINTF("\r\n");
+        shell_exec(shell->line, shell->line_position);
+
+        SHELL_PRINTF(shell_get_prompt());
+        memset(shell->line, 0, sizeof(shell->line));
+        shell->line_curpos = shell->line_position = 0;
+        return;
+    }
+
+    /* it's a large line, discard it */
+    if (shell->line_position >= SHELL_CMD_SIZE) {
+        shell->line_position = 0;
+    }
+
+    /* normal character */
+    if (shell->line_curpos < shell->line_position) {
+        int i;
+
+        memmove(&shell->line[shell->line_curpos + 1],
+                &shell->line[shell->line_curpos],
+                shell->line_position - shell->line_curpos);
+        shell->line[shell->line_curpos] = data;
+
+        SHELL_PRINTF("%s", &shell->line[shell->line_curpos]);
+
+        /* move the cursor to new position */
+        for (i = shell->line_curpos; i < shell->line_position; i++) {
+            SHELL_PRINTF("\b");
+        }
+    } else {
+        shell->line[shell->line_position] = data;
+        SHELL_PRINTF("%c", data);
+    }
+
+    data = 0;
+    shell->line_position++;
+    shell->line_curpos++;
+
+    if (shell->line_position >= SHELL_CMD_SIZE) {
+        /* clear command line */
+        shell->line_position = 0;
+        shell->line_curpos = 0;
+    }
+}
+
+static void shell_function_init(const void *begin, const void *end)
+{
+    _syscall_table_begin = (struct shell_syscall *)begin;
+    _syscall_table_end = (struct shell_syscall *)end;
+}
+
+static void shell_var_init(const void *begin, const void *end)
+{
+    _sysvar_table_begin = (struct shell_sysvar *)begin;
+    _sysvar_table_end = (struct shell_sysvar *)end;
+}
+
+/*
+ * @ingroup shell
+ *
+ * This function will initialize shell
+ */
+void shell_init(void)
+{
+#if defined(__CC_ARM) || defined(__CLANG_ARM) /* ARM C Compiler */
+    extern const int FSymTab$$Base;
+    extern const int FSymTab$$Limit;
+    extern const int VSymTab$$Base;
+    extern const int VSymTab$$Limit;
+    shell_function_init(&FSymTab$$Base, &FSymTab$$Limit);
+    shell_var_init(&VSymTab$$Base, &VSymTab$$Limit);
+#elif defined(__ICCARM__) || defined(__ICCRX__) /* for IAR Compiler */
+    shell_function_init(__section_begin("FSymTab"), __section_end("FSymTab"));
+    shell_var_init(__section_begin("VSymTab"), __section_end("VSymTab"));
+#elif defined(__GNUC__)
+    /* GNU GCC Compiler and TI CCS */
+    extern const int __fsymtab_start;
+    extern const int __fsymtab_end;
+    extern const int __vsymtab_start;
+    extern const int __vsymtab_end;
+    shell_function_init(&__fsymtab_start, &__fsymtab_end);
+    shell_var_init(&__vsymtab_start, &__vsymtab_end);
+#endif
+    shell = &_shell;
+}
\ No newline at end of file
diff --git a/components/shell/shell.h b/components/shell/shell.h
new file mode 100644
index 00000000..520eb072
--- /dev/null
+++ b/components/shell/shell.h
@@ -0,0 +1,132 @@
+/**
+ * @file shell.h
+ * @brief 
+ * 
+ * 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.
+ * 
+ */
+#ifndef __SHELL_H__
+#define __SHELL_H__
+
+#include "stdint.h"
+#include "string.h"
+#include "shell_config.h"
+#include "bflb_platform.h"
+
+#define SHELL_PRINTF bflb_platform_printf
+
+typedef int (*syscall_func)(void);
+typedef int (*cmd_function_t)(int argc, char **argv);
+
+enum input_stat {
+    WAIT_NORMAL,
+    WAIT_SPEC_KEY,
+    WAIT_FUNC_KEY,
+};
+
+struct shell {
+    enum input_stat stat;
+
+    uint16_t current_history;
+    uint16_t history_count;
+    char cmd_history[SHELL_HISTORY_LINES][SHELL_CMD_SIZE];
+
+    char line[SHELL_CMD_SIZE];
+    uint16_t line_position;
+    uint16_t line_curpos;
+
+#ifdef SHELL_USING_AUTH
+    char password[SHELL_PASSWORD_MAX];
+#endif
+
+#if defined(SHELL_USING_FS)
+
+#endif
+};
+
+/* system call table */
+struct shell_syscall {
+    const char *name; /* the name of system call */
+#if defined(SHELL_USING_DESCRIPTION)
+    const char *desc; /* description of system call */
+#endif
+    syscall_func func; /* the function address of system call */
+};
+
+/* system variable table */
+struct shell_sysvar {
+    const char *name; /* the name of variable */
+#if defined(SHELL_USING_DESCRIPTION)
+    const char *desc; /* description of system variable */
+#endif
+    uint8_t type; /* the type of variable */
+    void *var;    /* the address of variable */
+};
+
+#ifdef SHELL_USING_DESCRIPTION
+#define SHELL_FUNCTION_EXPORT_CMD(name, cmd, desc)                                                        \
+    const char __fsym_##cmd##_name[] __attribute__((section(".rodata.name"))) = #cmd;                     \
+    const char __fsym_##cmd##_desc[] __attribute__((section(".rodata.name"))) = #desc;                    \
+    __attribute__((used)) const struct shell_syscall __fsym_##cmd __attribute__((section("FSymTab"))) = { \
+        __fsym_##cmd##_name,                                                                              \
+        __fsym_##cmd##_desc,                                                                              \
+        (syscall_func)&name                                                                               \
+    };
+
+#define SHELL_VAR_EXPORT(name, type, desc)                                                                \
+    const char __vsym_##name##_name[] __attribute__((section(".rodata.name"))) = #name;                   \
+    const char __vsym_##name##_desc[] __attribute__((section(".rodata.name"))) = #desc;                   \
+    __attribute__((used)) const struct shell_sysvar __vsym_##name __attribute__((section("VSymTab"))) = { \
+        __vsym_##name##_name,                                                                             \
+        __vsym_##name##_desc,                                                                             \
+        type,                                                                                             \
+        (void *)&name                                                                                     \
+    };
+#else
+#define SHELL_FUNCTION_EXPORT_CMD(name, cmd, desc)                                                        \
+    const char __fsym_##cmd##_name[] = #cmd;                                                              \
+    __attribute__((used)) const struct shell_syscall __fsym_##cmd __attribute__((section("FSymTab"))) = { \
+        __fsym_##cmd##_name,                                                                              \
+        (syscall_func)&name                                                                               \
+    };
+
+#define SHELL_VAR_EXPORT(name, type, desc)                                                                \
+    const char __vsym_##name##_name[] = #name;                                                            \
+    __attribute__((used)) const struct shell_sysvar __vsym_##name __attribute__((section("VSymTab"))) = { \
+        __vsym_##name##_name,                                                                             \
+        type,                                                                                             \
+        (void *)&name                                                                                     \
+    };
+#endif /* end of SHELL_USING_DESCRIPTION */
+
+/**
+ * @ingroup shell
+ *
+ * This macro exports a command to module shell.
+ *
+ * @param command the name of command.
+ * @param desc the description of command, which will show in help.
+ */
+#define SHELL_CMD_EXPORT(command, desc) \
+    SHELL_FUNCTION_EXPORT_CMD(command, __cmd_##command, desc)
+#define SHELL_CMD_EXPORT_ALIAS(command, alias, desc) \
+    SHELL_FUNCTION_EXPORT_CMD(command, __cmd_##alias, desc)
+
+void shell_handler(uint8_t data);
+void shell_init(void);
+#endif
\ No newline at end of file
diff --git a/components/shell/shell_config.h b/components/shell/shell_config.h
new file mode 100644
index 00000000..a9404a48
--- /dev/null
+++ b/components/shell/shell_config.h
@@ -0,0 +1,13 @@
+#ifndef __SHELL_CONFIG_H__
+#define __SHELL_CONFIG_H__
+
+#define SHELL_NAME            "bouffalolab "
+#define SHELL_CONSOLEBUF_SIZE 128
+
+#define SHELL_HISTORY_LINES 5
+#define SHELL_CMD_SIZE      50
+#define SHELL_ARG_NUM       8
+
+//#define SHELL_USING_FS
+
+#endif
\ No newline at end of file
diff --git a/examples/shell/CMakeLists.txt b/examples/shell/CMakeLists.txt
new file mode 100644
index 00000000..27d34535
--- /dev/null
+++ b/examples/shell/CMakeLists.txt
@@ -0,0 +1,4 @@
+set(TARGET_REQUIRED_LIBS shell)
+set(mains main.c)
+generate_bin()
+
diff --git a/examples/shell/cdk/shell.cdkproj b/examples/shell/cdk/shell.cdkproj
new file mode 100644
index 00000000..b59f9a42
--- /dev/null
+++ b/examples/shell/cdk/shell.cdkproj
@@ -0,0 +1,921 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Project Name="shell" Version="1" Language="C">
+  <Description>CPU: RV32IMAFC
+Chip: bl70x
+Board: bl70x_iot
+  </Description>
+  <Dependencies Name="Debug"/>
+  <VirtualDirectory Name="app">
+    <File Name="../main.c">
+      <FileOption/>
+    </File>
+  </VirtualDirectory>
+  <VirtualDirectory Name="chip">
+    <VirtualDirectory Name="riscv">
+      <File Name="../../../drivers/bl702_driver/startup/interrupt.c">
+        <FileOption/>
+      </File>
+      <File Name="../../../drivers/bl702_driver/startup/system_bl702.c">
+        <FileOption/>
+      </File>
+    </VirtualDirectory>
+    <VirtualDirectory Name="startup">
+      <File Name="../../../drivers/bl702_driver/startup/GCC/entry.S">
+        <FileOption/>
+      </File>
+      <File Name="../../../drivers/bl702_driver/startup/GCC/start_load.c">
+        <FileOption/>
+      </File>
+    </VirtualDirectory>
+  </VirtualDirectory>
+  <VirtualDirectory Name="hal">
+    <File Name="../../../drivers/bl702_driver/hal_drv/src/hal_adc.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../drivers/bl702_driver/hal_drv/src/hal_dac.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../drivers/bl702_driver/hal_drv/src/hal_dma.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../drivers/bl702_driver/hal_drv/src/hal_gpio.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../drivers/bl702_driver/hal_drv/src/hal_i2c.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../drivers/bl702_driver/hal_drv/src/hal_i2s.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../drivers/bl702_driver/hal_drv/src/hal_mtimer.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../drivers/bl702_driver/hal_drv/src/hal_pwm.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../drivers/bl702_driver/hal_drv/src/hal_spi.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../drivers/bl702_driver/hal_drv/src/hal_timer.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../drivers/bl702_driver/hal_drv/src/hal_uart.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../drivers/bl702_driver/hal_drv/src/hal_usb.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../drivers/bl702_driver/hal_drv/src/hal_clock.c"/>
+  </VirtualDirectory>
+  <VirtualDirectory Name="std">
+    <File Name="../../../drivers/bl702_driver/std_drv/src/bl702_acomp.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../drivers/bl702_driver/std_drv/src/bl702_adc.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../drivers/bl702_driver/std_drv/src/bl702_aon.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../drivers/bl702_driver/std_drv/src/bl702_cam.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../drivers/bl702_driver/std_drv/src/bl702_clock.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../drivers/bl702_driver/std_drv/src/bl702_dac.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../drivers/bl702_driver/std_drv/src/bl702_dma.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../drivers/bl702_driver/std_drv/src/bl702_ef_ctrl.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../drivers/bl702_driver/std_drv/src/bl702_emac.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../drivers/bl702_driver/std_drv/src/bl702_glb.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../drivers/bl702_driver/std_drv/src/bl702_hbn.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../drivers/bl702_driver/std_drv/src/bl702_i2c.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../drivers/bl702_driver/std_drv/src/bl702_i2c_gpio_sim.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../drivers/bl702_driver/std_drv/src/bl702_i2s.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../drivers/bl702_driver/std_drv/src/bl702_ir.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../drivers/bl702_driver/std_drv/src/bl702_common.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../drivers/bl702_driver/std_drv/src/bl702_kys.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../drivers/bl702_driver/std_drv/src/bl702_l1c.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../drivers/bl702_driver/std_drv/src/bl702_mjpeg.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../drivers/bl702_driver/std_drv/src/bl702_pds.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../drivers/bl702_driver/std_drv/src/bl702_psram.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../drivers/bl702_driver/std_drv/src/bl702_pwm.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../drivers/bl702_driver/std_drv/src/bl702_qdec.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../drivers/bl702_driver/std_drv/src/bl702_romapi.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../drivers/bl702_driver/std_drv/src/bl702_romdriver.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../drivers/bl702_driver/std_drv/src/bl702_sec_dbg.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../drivers/bl702_driver/std_drv/src/bl702_sec_eng.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../drivers/bl702_driver/std_drv/src/bl702_sf_cfg.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../drivers/bl702_driver/std_drv/src/bl702_sf_cfg_ext.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../drivers/bl702_driver/std_drv/src/bl702_sf_ctrl.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../drivers/bl702_driver/std_drv/src/bl702_sflash.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../drivers/bl702_driver/std_drv/src/bl702_sflash_ext.c" ExcludeProjConfig="">
+      <FileOption/>
+    </File>
+    <File Name="../../../drivers/bl702_driver/std_drv/src/bl702_spi.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../drivers/bl702_driver/std_drv/src/bl702_timer.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../drivers/bl702_driver/std_drv/src/bl702_uart.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../drivers/bl702_driver/std_drv/src/bl702_usb.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../drivers/bl702_driver/std_drv/src/bl702_xip_sflash.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../drivers/bl702_driver/std_drv/src/bl702_xip_sflash_ext.c">
+      <FileOption/>
+    </File>
+  </VirtualDirectory>
+  <VirtualDirectory Name="board">
+    <File Name="../../../bsp/board/bl706_iot/board.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../bsp/bsp_common/platform/bflb_platform.c">
+      <FileOption/>
+    </File>
+  </VirtualDirectory>
+  <VirtualDirectory Name="common">
+    <File Name="../../../common/device/drv_device.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../common/memheap/drv_mmheap.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../common/ring_buffer/ring_buffer.c">
+      <FileOption/>
+    </File>
+    <File Name="../../../common/soft_crc/softcrc.c">
+      <FileOption/>
+    </File>
+    <VirtualDirectory Name="libc">
+      <File Name="../../../common/libc/src/atof.c">
+        <FileOption/>
+      </File>
+      <File Name="../../../common/libc/src/atoi.c">
+        <FileOption/>
+      </File>
+      <File Name="../../../common/libc/src/atol.c">
+        <FileOption/>
+      </File>
+      <File Name="../../../common/libc/src/atoll.c">
+        <FileOption/>
+      </File>
+      <File Name="../../../common/libc/src/atox.c" ExcludeProjConfig="BuildSet;CK_Link_Debug;OpenOCD_Debug">
+        <FileOption/>
+      </File>
+      <File Name="../../../common/libc/src/bsearch.c">
+        <FileOption/>
+      </File>
+      <File Name="../../../common/libc/src/common.c">
+        <FileOption/>
+      </File>
+      <File Name="../../../common/libc/src/ctype_isalnum.c">
+        <FileOption/>
+      </File>
+      <File Name="../../../common/libc/src/ctype_isalpha.c">
+        <FileOption/>
+      </File>
+      <File Name="../../../common/libc/src/ctype_isascii.c">
+        <FileOption/>
+      </File>
+      <File Name="../../../common/libc/src/ctype_isblank.c">
+        <FileOption/>
+      </File>
+      <File Name="../../../common/libc/src/ctype_iscntrl.c">
+        <FileOption/>
+      </File>
+      <File Name="../../../common/libc/src/ctype_isdigit.c">
+        <FileOption/>
+      </File>
+      <File Name="../../../common/libc/src/ctype_isgraph.c">
+        <FileOption/>
+      </File>
+      <File Name="../../../common/libc/src/ctype_islower.c">
+        <FileOption/>
+      </File>
+      <File Name="../../../common/libc/src/ctype_isprint.c">
+        <FileOption/>
+      </File>
+      <File Name="../../../common/libc/src/ctype_ispunct.c">
+        <FileOption/>
+      </File>
+      <File Name="../../../common/libc/src/ctype_isspace.c">
+        <FileOption/>
+      </File>
+      <File Name="../../../common/libc/src/ctype_isupper.c">
+        <FileOption/>
+      </File>
+      <File Name="../../../common/libc/src/ctype_isxdigit.c">
+        <FileOption/>
+      </File>
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+        <FileOption/>
+      </File>
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+        <FileOption/>
+      </File>
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+        <FileOption/>
+      </File>
+      <File Name="../../../common/libc/src/fnmatch.c">
+        <FileOption/>
+      </File>
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+        <FileOption/>
+      </File>
+      <File Name="../../../common/libc/src/lrand48.c">
+        <FileOption/>
+      </File>
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+      </File>
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+        <FileOption/>
+      </File>
+      <File Name="../../../common/libc/src/memcmp.c">
+        <FileOption/>
+      </File>
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+      </File>
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+      </File>
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+        <FileOption/>
+      </File>
+      <File Name="../../../common/libc/src/memset.c">
+        <FileOption/>
+      </File>
+      <File Name="../../../common/libc/src/memswap.c">
+        <FileOption/>
+      </File>
+      <File Name="../../../common/libc/src/mrand48.c">
+        <FileOption/>
+      </File>
+      <File Name="../../../common/libc/src/nrand48.c">
+        <FileOption/>
+      </File>
+      <File Name="../../../common/libc/src/qsort.c">
+        <FileOption/>
+      </File>
+      <File Name="../../../common/libc/src/seed48.c">
+        <FileOption/>
+      </File>
+      <File Name="../../../common/libc/src/snprintf.c">
+        <FileOption/>
+      </File>
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+        <FileOption/>
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+        <FileOption/>
+      </File>
+      <File Name="../../../common/libc/src/sscanf.c">
+        <FileOption/>
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+      <File Name="../../../common/libc/src/stdlib.c">
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+      </File>
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+        <FileOption/>
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+        <FileOption/>
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+        <FileOption/>
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+        <FileOption/>
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+        <FileOption/>
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+        <FileOption/>
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+        <FileOption/>
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+      <File Name="../../../common/libc/src/strntoimax.c">
+        <FileOption/>
+      </File>
+      <File Name="../../../common/libc/src/strntoumax.c">
+        <FileOption/>
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+        <FileOption/>
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+      <File Name="../../../common/libc/src/strrchr.c">
+        <FileOption/>
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+      <File Name="../../../common/libc/src/strsep.c">
+        <FileOption/>
+      </File>
+      <File Name="../../../common/libc/src/strspn.c">
+        <FileOption/>
+      </File>
+      <File Name="../../../common/libc/src/strstr.c">
+        <FileOption/>
+      </File>
+      <File Name="../../../common/libc/src/strtoimax.c">
+        <FileOption/>
+      </File>
+      <File Name="../../../common/libc/src/strtok.c">
+        <FileOption/>
+      </File>
+      <File Name="../../../common/libc/src/strtok_r.c">
+        <FileOption/>
+      </File>
+      <File Name="../../../common/libc/src/strtol.c">
+        <FileOption/>
+      </File>
+      <File Name="../../../common/libc/src/strtoll.c">
+        <FileOption/>
+      </File>
+      <File Name="../../../common/libc/src/strtoul.c">
+        <FileOption/>
+      </File>
+      <File Name="../../../common/libc/src/strtoull.c">
+        <FileOption/>
+      </File>
+      <File Name="../../../common/libc/src/strtoumax.c">
+        <FileOption/>
+      </File>
+      <File Name="../../../common/libc/src/strtox.c" ExcludeProjConfig="BuildSet;CK_Link_Debug;OpenOCD_Debug">
+        <FileOption/>
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+      <File Name="../../../common/libc/src/strxspn.c">
+        <FileOption/>
+      </File>
+      <File Name="../../../common/libc/src/vsnprintf.c">
+        <FileOption/>
+      </File>
+      <File Name="../../../common/libc/src/vsprintf.c">
+        <FileOption/>
+      </File>
+      <File Name="../../../common/libc/src/vsscanf.c">
+        <FileOption/>
+      </File>
+    </VirtualDirectory>
+    <File Name="../../../common/misc/misc.c">
+      <FileOption/>
+    </File>
+  </VirtualDirectory>
+  <VirtualDirectory Name="script">
+    <File Name="../../../tools/openocd/openocd_bl702_evb.cfg">
+      <FileOption/>
+    </File>
+    <File Name="../../../tools/openocd/bl70x_gdb.init">
+      <FileOption/>
+    </File>
+  </VirtualDirectory>
+  <MonitorProgress>
+    <DebugLaunch>76</DebugLaunch>
+  </MonitorProgress>
+  <VirtualDirectory Name="components">
+    <VirtualDirectory Name="fatfs">
+      <File Name="../../../components/fatfs/diskio.c">
+        <FileOption/>
+      </File>
+      <File Name="../../../components/fatfs/ff.c">
+        <FileOption/>
+      </File>
+      <File Name="../../../components/fatfs/ffsystem.c">
+        <FileOption/>
+      </File>
+      <File Name="../../../components/fatfs/ffunicode.c">
+        <FileOption/>
+      </File>
+    </VirtualDirectory>
+    <VirtualDirectory Name="shell">
+      <File Name="../../../components/shell/drv_shell.c">
+        <FileOption/>
+      </File>
+    </VirtualDirectory>
+    <VirtualDirectory Name="usb_stack">
+      <VirtualDirectory Name="class">
+        <VirtualDirectory Name="cdc">
+          <File Name="../../../components/usb_stack/class/cdc/usbd_cdc.c">
+            <FileOption/>
+          </File>
+        </VirtualDirectory>
+        <VirtualDirectory Name="hid">
+          <File Name="../../../components/usb_stack/class/hid/usbd_hid.c">
+            <FileOption/>
+          </File>
+        </VirtualDirectory>
+        <VirtualDirectory Name="msc">
+          <File Name="../../../components/usb_stack/class/msc/usbd_msc.c">
+            <FileOption/>
+          </File>
+        </VirtualDirectory>
+      </VirtualDirectory>
+      <VirtualDirectory Name="core">
+        <File Name="../../../components/usb_stack/core/usbd_core.c">
+          <FileOption/>
+        </File>
+      </VirtualDirectory>
+    </VirtualDirectory>
+  </VirtualDirectory>
+  <DebugSessions>
+    <watchExpressions/>
+    <memoryExpressions>;;;</memoryExpressions>
+    <statistics>;;MHZ;</statistics>
+    <peripheralTabs/>
+    <WatchDisplayFormat>1</WatchDisplayFormat>
+    <LocalDisplayFormat>1</LocalDisplayFormat>
+    <debugLayout/>
+    <memoryTabColSizeExpressions>100:8;100:8;100:8;100:8;</memoryTabColSizeExpressions>
+  </DebugSessions>
+  <Dependencies Name="BuildSet"/>
+  <BuildConfigs>
+    <BuildConfig Name="OpenOCD_Debug">
+      <Target>
+        <ROMBank Selected="1">
+          <ROM1>
+            <InUse>no</InUse>
+            <Start>0x23000000</Start>
+            <Size>0x100000</Size>
+          </ROM1>
+          <ROM2>
+            <InUse>no</InUse>
+            <Start>0x22014000</Start>
+            <Size>0x4000</Size>
+          </ROM2>
+          <ROM3>
+            <InUse>no</InUse>
+            <Start>0x42018000</Start>
+            <Size>0x8000</Size>
+          </ROM3>
+          <ROM4>
+            <InUse>no</InUse>
+            <Start/>
+            <Size/>
+          </ROM4>
+          <ROM5>
+            <InUse>no</InUse>
+            <Start/>
+            <Size/>
+          </ROM5>
+        </ROMBank>
+        <RAMBank>
+          <RAM1>
+            <InUse>yes</InUse>
+            <Start>0x42020000</Start>
+            <Size>0xc000</Size>
+            <Init>yes</Init>
+          </RAM1>
+          <RAM2>
+            <InUse>no</InUse>
+            <Start/>
+            <Size/>
+            <Init>yes</Init>
+          </RAM2>
+          <RAM3>
+            <InUse>no</InUse>
+            <Start/>
+            <Size/>
+            <Init>yes</Init>
+          </RAM3>
+          <RAM4>
+            <InUse>no</InUse>
+            <Start/>
+            <Size/>
+            <Init>yes</Init>
+          </RAM4>
+          <RAM5>
+            <InUse>no</InUse>
+            <Start/>
+            <Size/>
+            <Init>yes</Init>
+          </RAM5>
+        </RAMBank>
+        <CPU>rv32imafc</CPU>
+        <UseMiniLib>no</UseMiniLib>
+        <Endian>little</Endian>
+        <UseHardFloat>no</UseHardFloat>
+        <UseEnhancedLRW>no</UseEnhancedLRW>
+        <UseContinueBuild>no</UseContinueBuild>
+        <UseSemiHost>no</UseSemiHost>
+      </Target>
+      <Output>
+        <OutputName>$(ProjectName)</OutputName>
+        <Type>Executable</Type>
+        <CreateHexFile>no</CreateHexFile>
+        <CreateBinFile>yes</CreateBinFile>
+        <Preprocessor>no</Preprocessor>
+        <Disassmeble>yes</Disassmeble>
+        <CallGraph>no</CallGraph>
+        <Map>yes</Map>
+      </Output>
+      <User>
+        <BeforeCompile>
+          <RunUserProg>no</RunUserProg>
+          <UserProgName/>
+        </BeforeCompile>
+        <BeforeMake>
+          <RunUserProg>no</RunUserProg>
+          <UserProgName/>
+        </BeforeMake>
+        <AfterMake>
+          <RunUserProg>no</RunUserProg>
+          <UserProgName>$(ProjectPath)../../../tools/bflb_flash_tool/bflb_mcu_tool.exe  --chipname=bl702 --interface=openocd --firmware="$(ProjectPath)/Obj/$(ProjectName).bin" </UserProgName>
+        </AfterMake>
+      </User>
+      <Compiler>
+        <Define>ARCH_RISCV;</Define>
+        <Undefine/>
+        <Optim>Optimize more (-O2)</Optim>
+        <DebugLevel>Default (-g)</DebugLevel>
+        <IncludePath>$(ProjectPath);$(ProjectPath)../;$(ProjectPath)../../../components/fatfs;$(ProjectPath)../../../components/freertos/Source/include;$(ProjectPath)../../../components/shell;$(ProjectPath)../../../components/usb_stack/class/audio;$(ProjectPath)../../../components/usb_stack/class/cdc;$(ProjectPath)../../../components/usb_stack/class/hid;$(ProjectPath)../../../components/usb_stack/class/msc;$(ProjectPath)../../../components/usb_stack/class/video;$(ProjectPath)../../../components/usb_stack/class/webusb;$(ProjectPath)../../../components/usb_stack/class/winusb;$(ProjectPath)../../../components/usb_stack/common;$(ProjectPath)../../../components/usb_stack/core;$(ProjectPath)../../../bsp/board/bl706_iot;$(ProjectPath)../../../bsp/bsp_common/platform;$(ProjectPath)../../../common/libc/inc;$(ProjectPath)../../../common/libc/inc/arm_gcc;$(ProjectPath)../../../common/libc/inc/bits;$(ProjectPath)../../../common/libc/inc/sys;$(ProjectPath)../../../common/libc/src;$(ProjectPath)../../../common/device;$(ProjectPath)../../../common/list;$(ProjectPath)../../../common/memheap;$(ProjectPath)../../../common/misc;$(ProjectPath)../../../common/ring_buffer;$(ProjectPath)../../../common/soft_crc;$(ProjectPath)../../../components/shell;$(ProjectPath)../../../drivers/bl702_driver/hal_drv/default_config;$(ProjectPath)../../../drivers/bl702_driver/hal_drv/inc;$(ProjectPath)../../../drivers/bl702_driver/risc-v/Core/Include;$(ProjectPath)../../../drivers/bl702_driver/regs;$(ProjectPath)../../../drivers/bl702_driver/startup;$(ProjectPath)../../../drivers/bl702_driver/std_drv/inc;$(ProjectPath)../../../drivers/bl602_driver/risc-v/Core/Include;$(ProjectPath)../../../drivers/bl602_driver/startup;$(ProjectPath)../../../drivers/bl602_driver/hal_drv/inc;$(ProjectPath)../../../drivers/bl602_driver/hal_drv/default_config;$(ProjectPath)../../../drivers/bl602_driver/regs;$(ProjectPath)../../../drivers/bl602_driver/std_drv/inc</IncludePath>
+        <OtherFlags>-fshort-enums -fno-common -fms-extensions -ffunction-sections -fdata-sections -fstrict-volatile-bitfields -Wall -Wshift-negative-value -Wchar-subscripts -Wformat -Wuninitialized -Winit-self -fno-jump-tables -Wignored-qualifiers -Wswitch-default -Wunused -Wundef -msmall-data-limit=4</OtherFlags>
+        <Verbose>no</Verbose>
+        <Ansi>no</Ansi>
+        <Syntax>no</Syntax>
+        <Pedantic>no</Pedantic>
+        <PedanticErr>no</PedanticErr>
+        <InhibitWarn>no</InhibitWarn>
+        <AllWarn>yes</AllWarn>
+        <WarnErr>no</WarnErr>
+        <OneElfS>yes</OneElfS>
+        <Fstrict>no</Fstrict>
+      </Compiler>
+      <Asm>
+        <Define/>
+        <Undefine/>
+        <IncludePath>$(ProjectPath);$(ProjectPath)../;$(ProjectPath)../../../components/fatfs;$(ProjectPath)../../../components/freertos/Source/include;$(ProjectPath)../../../components/shell;$(ProjectPath)../../../components/usb_stack/class/audio;$(ProjectPath)../../../components/usb_stack/class/cdc;$(ProjectPath)../../../components/usb_stack/class/hid;$(ProjectPath)../../../components/usb_stack/class/msc;$(ProjectPath)../../../components/usb_stack/class/video;$(ProjectPath)../../../components/usb_stack/class/webusb;$(ProjectPath)../../../components/usb_stack/class/winusb;$(ProjectPath)../../../components/usb_stack/common;$(ProjectPath)../../../components/usb_stack/core;$(ProjectPath)../../../bsp/board/bl706_iot;$(ProjectPath)../../../bsp/bsp_common/platform;$(ProjectPath)../../../common/device;$(ProjectPath)../../../common/list;$(ProjectPath)../../../common/memheap;$(ProjectPath)../../../common/misc;$(ProjectPath)../../../common/ring_buffer;$(ProjectPath)../../../common/soft_crc;$(ProjectPath)../../../components/shell;$(ProjectPath)../../../drivers/bl702_driver/hal_drv/default_config;$(ProjectPath)../../../drivers/bl702_driver/hal_drv/inc;$(ProjectPath)../../../drivers/bl702_driver/risc-v/Core/Include;$(ProjectPath)../../../drivers/bl702_driver/regs;$(ProjectPath)../../../drivers/bl702_driver/startup;$(ProjectPath)../../../drivers/bl702_driver/std_drv/inc;$(ProjectPath)../../../drivers/bl602_driver/risc-v/Core/Include;$(ProjectPath)../../../drivers/bl602_driver/startup;$(ProjectPath)../../../drivers/bl602_driver/hal_drv/inc;$(ProjectPath)../../../drivers/bl602_driver/hal_drv/default_config;$(ProjectPath)../../../drivers/bl602_driver/regs;$(ProjectPath)../../../drivers/bl602_driver/std_drv/inc</IncludePath>
+        <OtherFlags/>
+        <DebugLevel>gdwarf2</DebugLevel>
+      </Asm>
+      <Linker>
+        <Garbage>yes</Garbage>
+        <Garbage2>yes</Garbage2>
+        <LDFile>$(ProjectPath)../../../drivers/bl702_driver/bl702_flash.ld</LDFile>
+        <LibName/>
+        <LibPath/>
+        <OtherFlags/>
+        <AutoLDFile>no</AutoLDFile>
+        <LinkType/>
+      </Linker>
+      <Debug>
+        <LoadApplicationAtStartup>yes</LoadApplicationAtStartup>
+        <Connector>OpenOCD</Connector>
+        <StopAt>yes</StopAt>
+        <StopAtText>main</StopAtText>
+        <InitFile/>
+        <AfterLoadFile>$(ProjectPath)../../../tools/openocd/bl70x_gdb.init</AfterLoadFile>
+        <AutoRun>yes</AutoRun>
+        <ResetType>Hard Reset</ResetType>
+        <SoftResetVal>23000000</SoftResetVal>
+        <ResetAfterLoad>no</ResetAfterLoad>
+        <Dumpcore>no</Dumpcore>
+        <DumpcoreText>$(ProjectPath)/$(ProjectName).cdkcore</DumpcoreText>
+        <ConfigICE>
+          <IP>localhost</IP>
+          <PORT>1025</PORT>
+          <CPUNumber>0</CPUNumber>
+          <Clock>2000</Clock>
+          <Delay>10</Delay>
+          <WaitReset>50</WaitReset>
+          <DDC>yes</DDC>
+          <TRST>no</TRST>
+          <DebugPrint>no</DebugPrint>
+          <Connect>Normal</Connect>
+          <ResetType>Hard Reset</ResetType>
+          <SoftResetVal>21000000</SoftResetVal>
+          <RTOSType>Bare Metal</RTOSType>
+          <DownloadToFlash>yes</DownloadToFlash>
+          <ResetAfterConnect>yes</ResetAfterConnect>
+          <GDBName/>
+          <GDBServerType>Local</GDBServerType>
+          <OtherFlags>-arch riscv</OtherFlags>
+        </ConfigICE>
+        <ConfigSIM>
+          <SIMTarget/>
+          <OtherFlags/>
+          <NoGraphic>yes</NoGraphic>
+          <Log>no</Log>
+          <SimTrace>no</SimTrace>
+        </ConfigSIM>
+        <ConfigOpenOCD>
+          <OpenOCDExecutablePath>openocd-hifive</OpenOCDExecutablePath>
+          <OpenOCDTelnetPortEnable>no</OpenOCDTelnetPortEnable>
+          <OpenOCDTelnetPort>4444</OpenOCDTelnetPort>
+          <OpenOCDTclPortEnable>no</OpenOCDTclPortEnable>
+          <OpenOCDTclPort>6666</OpenOCDTclPort>
+          <OpenOCDConfigOptions>-f ../../../tools/openocd/if_rv_dbg_plus.cfg -f ../../../tools/openocd/tgt_702.cfg</OpenOCDConfigOptions>
+        </ConfigOpenOCD>
+      </Debug>
+      <Flash>
+        <InitFile/>
+        <Erase>Erase Sectors</Erase>
+        <Algorithms Path="">bl70x_flasher.elf</Algorithms>
+        <Program>yes</Program>
+        <Verify>yes</Verify>
+        <ResetAndRun>no</ResetAndRun>
+        <ResetType>Hard Reset</ResetType>
+        <SoftResetVal/>
+        <External>no</External>
+        <Command/>
+        <Arguments/>
+      </Flash>
+    </BuildConfig>
+    <BuildConfig Name="CK_Link_Debug">
+      <Target>
+        <ROMBank Selected="1">
+          <ROM1>
+            <InUse>no</InUse>
+            <Start>0x23000000</Start>
+            <Size>0x100000</Size>
+          </ROM1>
+          <ROM2>
+            <InUse>no</InUse>
+            <Start>0x22014000</Start>
+            <Size>0x4000</Size>
+          </ROM2>
+          <ROM3>
+            <InUse>no</InUse>
+            <Start>0x42018000</Start>
+            <Size>0x8000</Size>
+          </ROM3>
+          <ROM4>
+            <InUse>no</InUse>
+            <Start/>
+            <Size/>
+          </ROM4>
+          <ROM5>
+            <InUse>no</InUse>
+            <Start/>
+            <Size/>
+          </ROM5>
+        </ROMBank>
+        <RAMBank>
+          <RAM1>
+            <InUse>yes</InUse>
+            <Start>0x42020000</Start>
+            <Size>0xc000</Size>
+            <Init>yes</Init>
+          </RAM1>
+          <RAM2>
+            <InUse>no</InUse>
+            <Start/>
+            <Size/>
+            <Init>yes</Init>
+          </RAM2>
+          <RAM3>
+            <InUse>no</InUse>
+            <Start/>
+            <Size/>
+            <Init>yes</Init>
+          </RAM3>
+          <RAM4>
+            <InUse>no</InUse>
+            <Start/>
+            <Size/>
+            <Init>yes</Init>
+          </RAM4>
+          <RAM5>
+            <InUse>no</InUse>
+            <Start/>
+            <Size/>
+            <Init>yes</Init>
+          </RAM5>
+        </RAMBank>
+        <CPU>rv32imac</CPU>
+        <UseMiniLib>no</UseMiniLib>
+        <Endian>little</Endian>
+        <UseHardFloat>no</UseHardFloat>
+        <UseEnhancedLRW>no</UseEnhancedLRW>
+        <UseContinueBuild>no</UseContinueBuild>
+        <UseSemiHost>no</UseSemiHost>
+      </Target>
+      <Output>
+        <OutputName>$(ProjectName)</OutputName>
+        <Type>Executable</Type>
+        <CreateHexFile>no</CreateHexFile>
+        <CreateBinFile>yes</CreateBinFile>
+        <Preprocessor>no</Preprocessor>
+        <Disassmeble>yes</Disassmeble>
+        <CallGraph>no</CallGraph>
+        <Map>yes</Map>
+      </Output>
+      <User>
+        <BeforeCompile>
+          <RunUserProg>no</RunUserProg>
+          <UserProgName/>
+        </BeforeCompile>
+        <BeforeMake>
+          <RunUserProg>no</RunUserProg>
+          <UserProgName/>
+        </BeforeMake>
+        <AfterMake>
+          <RunUserProg>no</RunUserProg>
+          <UserProgName>$(ProjectPath)../../../tools/bflb_flash_tool/bflb_mcu_tool.exe  --chipname=bl702 --firmware="$(ProjectPath)/Obj/$(ProjectName).bin" </UserProgName>
+        </AfterMake>
+      </User>
+      <Compiler>
+        <Define>ARCH_RISCV;</Define>
+        <Undefine/>
+        <Optim>Optimize more (-O2)</Optim>
+        <DebugLevel>Default (-g)</DebugLevel>
+        <IncludePath>$(ProjectPath);$(ProjectPath)../;$(ProjectPath)../../../components/fatfs;$(ProjectPath)../../../components/freertos/Source/include;$(ProjectPath)../../../components/shell;$(ProjectPath)../../../components/usb_stack/class/audio;$(ProjectPath)../../../components/usb_stack/class/cdc;$(ProjectPath)../../../components/usb_stack/class/hid;$(ProjectPath)../../../components/usb_stack/class/msc;$(ProjectPath)../../../components/usb_stack/class/video;$(ProjectPath)../../../components/usb_stack/class/webusb;$(ProjectPath)../../../components/usb_stack/class/winusb;$(ProjectPath)../../../components/usb_stack/common;$(ProjectPath)../../../components/usb_stack/core;$(ProjectPath)../../../bsp/board/bl706_iot;$(ProjectPath)../../../bsp/bsp_common/platform;$(ProjectPath)../../../common/libc/inc;$(ProjectPath)../../../common/libc/inc/arm_gcc;$(ProjectPath)../../../common/libc/inc/bits;$(ProjectPath)../../../common/libc/inc/sys;$(ProjectPath)../../../common/libc/src;$(ProjectPath)../../../common/device;$(ProjectPath)../../../common/list;$(ProjectPath)../../../common/memheap;$(ProjectPath)../../../common/misc;$(ProjectPath)../../../common/ring_buffer;$(ProjectPath)../../../common/soft_crc;$(ProjectPath)../../../components/shell;$(ProjectPath)../../../drivers/bl702_driver/hal_drv/default_config;$(ProjectPath)../../../drivers/bl702_driver/hal_drv/inc;$(ProjectPath)../../../drivers/bl702_driver/risc-v/Core/Include;$(ProjectPath)../../../drivers/bl702_driver/regs;$(ProjectPath)../../../drivers/bl702_driver/startup;$(ProjectPath)../../../drivers/bl702_driver/std_drv/inc;$(ProjectPath)../../../drivers/bl602_driver/risc-v/Core/Include;$(ProjectPath)../../../drivers/bl602_driver/startup;$(ProjectPath)../../../drivers/bl602_driver/hal_drv/inc;$(ProjectPath)../../../drivers/bl602_driver/hal_drv/default_config;$(ProjectPath)../../../drivers/bl602_driver/regs;$(ProjectPath)../../../drivers/bl602_driver/std_drv/inc</IncludePath>
+        <OtherFlags>-fshort-enums -fno-common -fms-extensions -ffunction-sections -fdata-sections -fstrict-volatile-bitfields -Wall -Wshift-negative-value -Wchar-subscripts -Wformat -Wuninitialized -Winit-self -fno-jump-tables -Wignored-qualifiers -Wswitch-default -Wunused -Wundef -msmall-data-limit=4</OtherFlags>
+        <Verbose>no</Verbose>
+        <Ansi>no</Ansi>
+        <Syntax>no</Syntax>
+        <Pedantic>no</Pedantic>
+        <PedanticErr>no</PedanticErr>
+        <InhibitWarn>no</InhibitWarn>
+        <AllWarn>yes</AllWarn>
+        <WarnErr>no</WarnErr>
+        <OneElfS>yes</OneElfS>
+        <Fstrict>no</Fstrict>
+      </Compiler>
+      <Asm>
+        <Define/>
+        <Undefine/>
+        <IncludePath>$(ProjectPath);$(ProjectPath)../;$(ProjectPath)../../../components/fatfs;$(ProjectPath)../../../components/freertos/Source/include;$(ProjectPath)../../../components/shell;$(ProjectPath)../../../components/usb_stack/class/audio;$(ProjectPath)../../../components/usb_stack/class/cdc;$(ProjectPath)../../../components/usb_stack/class/hid;$(ProjectPath)../../../components/usb_stack/class/msc;$(ProjectPath)../../../components/usb_stack/class/video;$(ProjectPath)../../../components/usb_stack/class/webusb;$(ProjectPath)../../../components/usb_stack/class/winusb;$(ProjectPath)../../../components/usb_stack/common;$(ProjectPath)../../../components/usb_stack/core;$(ProjectPath)../../../bsp/board/bl706_iot;$(ProjectPath)../../../bsp/bsp_common/platform;$(ProjectPath)../../../common/device;$(ProjectPath)../../../common/list;$(ProjectPath)../../../common/memheap;$(ProjectPath)../../../common/misc;$(ProjectPath)../../../common/ring_buffer;$(ProjectPath)../../../common/soft_crc;$(ProjectPath)../../../components/shell;$(ProjectPath)../../../drivers/bl702_driver/hal_drv/default_config;$(ProjectPath)../../../drivers/bl702_driver/hal_drv/inc;$(ProjectPath)../../../drivers/bl702_driver/risc-v/Core/Include;$(ProjectPath)../../../drivers/bl702_driver/regs;$(ProjectPath)../../../drivers/bl702_driver/startup;$(ProjectPath)../../../drivers/bl702_driver/std_drv/inc;$(ProjectPath)../../../drivers/bl602_driver/risc-v/Core/Include;$(ProjectPath)../../../drivers/bl602_driver/startup;$(ProjectPath)../../../drivers/bl602_driver/hal_drv/inc;$(ProjectPath)../../../drivers/bl602_driver/hal_drv/default_config;$(ProjectPath)../../../drivers/bl602_driver/regs;$(ProjectPath)../../../drivers/bl602_driver/std_drv/inc</IncludePath>
+        <OtherFlags/>
+        <DebugLevel>gdwarf2</DebugLevel>
+      </Asm>
+      <Linker>
+        <Garbage>yes</Garbage>
+        <Garbage2>yes</Garbage2>
+        <LDFile>$(ProjectPath)../../../drivers/bl702_driver/bl702_flash.ld</LDFile>
+        <LibName/>
+        <LibPath/>
+        <OtherFlags/>
+        <AutoLDFile>no</AutoLDFile>
+        <LinkType/>
+      </Linker>
+      <Debug>
+        <LoadApplicationAtStartup>no</LoadApplicationAtStartup>
+        <Connector>ICE</Connector>
+        <StopAt>yes</StopAt>
+        <StopAtText>main</StopAtText>
+        <InitFile>$(ProjectPath)/../../../tools/openocd/bl70x_gdb.init</InitFile>
+        <AfterLoadFile/>
+        <AutoRun>yes</AutoRun>
+        <ResetType>Hard Reset</ResetType>
+        <SoftResetVal>21000000</SoftResetVal>
+        <ResetAfterLoad>no</ResetAfterLoad>
+        <Dumpcore>no</Dumpcore>
+        <DumpcoreText>$(ProjectPath)/$(ProjectName).cdkcore</DumpcoreText>
+        <ConfigICE>
+          <IP>localhost</IP>
+          <PORT>1025</PORT>
+          <CPUNumber>0</CPUNumber>
+          <Clock>2000</Clock>
+          <Delay>10</Delay>
+          <WaitReset>50</WaitReset>
+          <DDC>yes</DDC>
+          <TRST>yes</TRST>
+          <DebugPrint>no</DebugPrint>
+          <Connect>with Pre-reset</Connect>
+          <ResetType>Hard Reset</ResetType>
+          <SoftResetVal>21000000</SoftResetVal>
+          <RTOSType>Bare Metal</RTOSType>
+          <DownloadToFlash>no</DownloadToFlash>
+          <ResetAfterConnect>yes</ResetAfterConnect>
+          <GDBName/>
+          <GDBServerType>Local</GDBServerType>
+          <OtherFlags>-arch riscv</OtherFlags>
+        </ConfigICE>
+        <ConfigSIM>
+          <SIMTarget/>
+          <OtherFlags/>
+          <NoGraphic>yes</NoGraphic>
+          <Log>no</Log>
+          <SimTrace>no</SimTrace>
+        </ConfigSIM>
+        <ConfigOpenOCD>
+          <OpenOCDExecutablePath>openocd-hifive</OpenOCDExecutablePath>
+          <OpenOCDTelnetPortEnable>no</OpenOCDTelnetPortEnable>
+          <OpenOCDTelnetPort>4444</OpenOCDTelnetPort>
+          <OpenOCDTclPortEnable>no</OpenOCDTclPortEnable>
+          <OpenOCDTclPort>6666</OpenOCDTclPort>
+          <OpenOCDConfigOptions>-f ../../../tools/openocd/if_rv_dbg_plus.cfg -f ../../../tools/openocd/tgt_702.cfg</OpenOCDConfigOptions>
+        </ConfigOpenOCD>
+      </Debug>
+      <Flash>
+        <InitFile>$(ProjectPath)/flash.init</InitFile>
+        <Erase>Erase Sectors</Erase>
+        <Algorithms Path=""/>
+        <Program>no</Program>
+        <Verify>no</Verify>
+        <ResetAndRun>no</ResetAndRun>
+        <ResetType>Soft Reset</ResetType>
+        <SoftResetVal/>
+        <External>yes</External>
+        <Command/>
+        <Arguments/>
+      </Flash>
+    </BuildConfig>
+  </BuildConfigs>
+  <DebugSessions>
+    <watchExpressions/>
+    <memoryExpressions>;;;</memoryExpressions>
+    <statistics>;;MHZ;</statistics>
+    <peripheralTabs>
+      <Tab disFormat="Hex">glb</Tab>
+      <Tab disFormat="Hex">uart</Tab>
+    </peripheralTabs>
+    <WatchDisplayFormat>1</WatchDisplayFormat>
+    <LocalDisplayFormat>1</LocalDisplayFormat>
+    <debugLayout/>
+    <memoryTabColSizeExpressions>100:8;100:8;100:8;100:8;</memoryTabColSizeExpressions>
+  </DebugSessions>
+  <DebugSessions>
+    <watchExpressions/>
+    <memoryExpressions>;;;</memoryExpressions>
+    <statistics>;;MHZ;</statistics>
+    <peripheralTabs>
+      <Tab disFormat="Hex">glb</Tab>
+      <Tab disFormat="Hex">uart</Tab>
+    </peripheralTabs>
+    <WatchDisplayFormat>1</WatchDisplayFormat>
+    <LocalDisplayFormat>1</LocalDisplayFormat>
+    <debugLayout/>
+    <memoryTabColSizeExpressions>100:8;100:8;100:8;100:8;</memoryTabColSizeExpressions>
+  </DebugSessions>
+</Project>
diff --git a/examples/shell/main.c b/examples/shell/main.c
new file mode 100644
index 00000000..80192cbe
--- /dev/null
+++ b/examples/shell/main.c
@@ -0,0 +1,67 @@
+/**
+ * @file main.c
+ * @brief
+ *
+ * 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.
+ *
+ */
+#include "hal_uart.h"
+#include "shell.h"
+
+void shell_irq_callback(struct device *dev, void *args, uint32_t size, uint32_t state)
+{
+    uint8_t data;
+    if (state == UART_EVENT_RX_FIFO) {
+        data = *(uint8_t *)args;
+        shell_handler(data);
+    }
+}
+
+int main(void)
+{
+    bflb_platform_init(0);
+    shell_init();
+    struct device *uart = device_find("debug_log");
+    if (uart) {
+        device_set_callback(uart, shell_irq_callback);
+        device_control(uart, DEVICE_CTRL_SET_INT, (void *)(UART_RX_FIFO_IT));
+    }
+
+    while (1) {
+        __asm volatile("nop");
+    }
+}
+
+void hellowd()
+{
+    MSG("hello World\r\n");
+}
+
+int echo(int argc, char *argv[])
+{
+    MSG("%dparameter(s)\r\n", argc);
+
+    for (uint8_t i = 1; i < argc; i++) {
+        MSG("%s\r\n", argv[i]);
+    }
+
+    return 0;
+}
+
+SHELL_CMD_EXPORT(hellowd, hellowd test)
+SHELL_CMD_EXPORT(echo, echo test)
\ No newline at end of file
diff --git a/examples/shell/readme.md b/examples/shell/readme.md
new file mode 100644
index 00000000..62a45921
--- /dev/null
+++ b/examples/shell/readme.md
@@ -0,0 +1,5 @@
+```bash
+
+$ make APP=shell BOARD=bl706_iot
+
+```
\ No newline at end of file