diff --git a/bsp/stm32/tools/upgrade.py b/bsp/stm32/tools/upgrade.py
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+#
+# File      : upgrade.py
+# This file is part of RT-Thread RTOS
+# COPYRIGHT (C) 2006 - 2021, RT-Thread Development Team
+#
+#  This program is free software; you can redistribute it and/or modify
+#  it under the terms of the GNU General Public License as published by
+#  the Free Software Foundation; either version 2 of the License, or
+#  (at your option) any later version.
+#
+#  This program is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#  GNU General Public License for more details.
+#
+#  You should have received a copy of the GNU General Public License along
+#  with this program; if not, write to the Free Software Foundation, Inc.,
+#  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+# Change Logs:
+# Date           Author       Notes
+# 2021-10-11     Meco Man     First version
+#
+
+# 本文件用于在HAL库更新之后
+# 1.对gcc的汇编启动文件中main替换为entry函数
+# 2.将启动文件heap降为0
+
+
+#使用方法：运行脚本，将bsp/stm32的绝对路径传给脚本即可，如：C:\Users\92036\Desktop\rt-thread\bsp\stm32
+
+import os
+import re
+
+#将'bl main' 替换为 'bl entry'
+def main2entry(path):
+    oldline = ''
+    newline = ''
+
+    for root, dirs, files in os.walk(path): #递归扫描里面的所有文件
+        for file in files:
+            if os.path.splitext(file)[1] == '.s': #找.s文件
+                file_path = os.path.join(root,file)
+                flag_need_replace = False
+                with open(file_path,'r+',) as f:
+                    while True:
+                        line = f.readline()
+                        if line == '':
+                            break
+                        elif ('bl' in line) and ('main' in line): #发现'bl main'
+                            oldline = line # bl main
+                            newline = line.replace('main', 'entry') #将main替换为entry，形成新的字符串
+                            flag_need_replace = True #标记该文件需要做entry替换
+                            break
+
+                    if (flag_need_replace == True): #若该文件需要将main替换为entry
+                        f.seek(0)
+                        content = f.read()
+                        f.seek(0)
+                        f.truncate()
+                        newcontent = content.replace(oldline, newline)
+                        f.write(newcontent)
+
+#将启动文件的heap降为0
+def heap2zero(path):
+    oldline = ''
+    newline = ''
+    for root, dirs, files in os.walk(path): #递归扫描里面的所有文件
+        for file in files:
+            file_path = os.path.join(root,file)
+            if os.path.splitext(file)[1] == '.s': #找.s文件
+                with open(file_path,'r+',) as f:
+                    flag_need_replace = False
+                    while True:
+                        line = f.readline()
+                        if line == '':
+                            break
+
+                        re_result = re.match('\s*Heap_Size\s+EQU\s+0[xX][0-9a-fA-F]+', line) #MDK的表示方法
+                        if re_result != None:
+                            oldline = line
+                            newline = re.sub('0[xX][0-9a-fA-F]+','0x00000000', oldline)
+                            flag_need_replace = True
+                            break
+
+                    if flag_need_replace == True:
+                        f.seek(0)
+                        content = f.read()
+                        f.seek(0)
+                        f.truncate()
+                        newcontent = content.replace(oldline, newline)
+                        f.write(newcontent)
+
+            elif os.path.splitext(file)[1] == '.icf': #找.icf文件(IAR)
+                with open(file_path,'r+',) as f:
+                    flag_need_replace = False
+                    while True:
+                        line = f.readline()
+                        if line == '':
+                            break
+
+                        re_result = re.match('\s*define\s+symbol\s+__ICFEDIT_size_heap__\s*=\s*0[xX][0-9a-fA-F]+', line) #IAR的表示方法
+                        if re_result != None:
+                            oldline = line
+                            newline = re.sub('0[xX][0-9a-fA-F]+','0x000', oldline)
+                            flag_need_replace = True
+                            break
+
+                    if flag_need_replace == True:
+                        f.seek(0)
+                        content = f.read()
+                        f.seek(0)
+                        f.truncate()
+                        newcontent = content.replace(oldline, newline)
+                        f.write(newcontent)
+
+            elif os.path.splitext(file)[1] == '.lds': #找.lds文件(GCC)
+                with open(file_path,'r+',) as f:
+                    flag_need_replace = False
+                    while True:
+                        line = f.readline()
+                        if line == '':
+                            break
+
+                        re_result = re.match('\s*_system_stack_size\s*=\s*0[xX][0-9a-fA-F]+', line) #GCC的表示方法
+                        if re_result != None:
+                            oldline = line
+                            newline = re.sub('0[xX][0-9a-fA-F]+','0x000', oldline)
+                            flag_need_replace = True
+                            break
+
+                    if flag_need_replace == True:
+                        f.seek(0)
+                        content = f.read()
+                        f.seek(0)
+                        f.truncate()
+                        newcontent = content.replace(oldline, newline)
+                        f.write(newcontent)
+
+folder_path = input('please input path:')
+main2entry(folder_path)
+heap2zero(folder_path)