diff --git a/mcu/tools/replace_string.pl b/mcu/tools/replace_string.pl
new file mode 100644
index 0000000..7fef3f2
--- /dev/null
+++ b/mcu/tools/replace_string.pl
@@ -0,0 +1,68 @@
+#!/usr/bin/perl
+#
+#  Copyright Statement:
+#  --------------------
+#  This software is protected by Copyright and the information contained
+#  herein is confidential. The software may not be copied and the information
+#  contained herein may not be used or disclosed except with the written
+#  permission of MediaTek Inc. (C) 2005
+#
+#  BY OPENING THIS FILE, BUYER HEREBY UNEQUIVOCALLY ACKNOWLEDGES AND AGREES
+#  THAT THE SOFTWARE/FIRMWARE AND ITS DOCUMENTATIONS ("MEDIATEK SOFTWARE")
+#  RECEIVED FROM MEDIATEK AND/OR ITS REPRESENTATIVES ARE PROVIDED TO BUYER ON
+#  AN "AS-IS" BASIS ONLY. MEDIATEK EXPRESSLY DISCLAIMS ANY AND ALL WARRANTIES,
+#  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF
+#  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT.
+#  NEITHER DOES MEDIATEK PROVIDE ANY WARRANTY WHATSOEVER WITH RESPECT TO THE
+#  SOFTWARE OF ANY THIRD PARTY WHICH MAY BE USED BY, INCORPORATED IN, OR
+#  SUPPLIED WITH THE MEDIATEK SOFTWARE, AND BUYER AGREES TO LOOK ONLY TO SUCH
+#  THIRD PARTY FOR ANY WARRANTY CLAIM RELATING THERETO. MEDIATEK SHALL ALSO
+#  NOT BE RESPONSIBLE FOR ANY MEDIATEK SOFTWARE RELEASES MADE TO BUYER'S
+#  SPECIFICATION OR TO CONFORM TO A PARTICULAR STANDARD OR OPEN FORUM.
+#
+#  BUYER'S SOLE AND EXCLUSIVE REMEDY AND MEDIATEK'S ENTIRE AND CUMULATIVE
+#  LIABILITY WITH RESPECT TO THE MEDIATEK SOFTWARE RELEASED HEREUNDER WILL BE,
+#  AT MEDIATEK'S OPTION, TO REVISE OR REPLACE THE MEDIATEK SOFTWARE AT ISSUE,
+#  OR REFUND ANY SOFTWARE LICENSE FEES OR SERVICE CHARGE PAID BY BUYER TO
+#  MEDIATEK FOR SUCH MEDIATEK SOFTWARE AT ISSUE.
+#
+#  THE TRANSACTION CONTEMPLATED HEREUNDER SHALL BE CONSTRUED IN ACCORDANCE
+#  WITH THE LAWS OF THE STATE OF CALIFORNIA, USA, EXCLUDING ITS CONFLICT OF
+#  LAWS PRINCIPLES.  ANY DISPUTES, CONTROVERSIES OR CLAIMS ARISING THEREOF AND
+#  RELATED THERETO SHALL BE SETTLED BY ARBITRATION IN SAN FRANCISCO, CA, UNDER
+#  THE RULES OF THE INTERNATIONAL CHAMBER OF COMMERCE (ICC).
+#
+#
+#!/usr/bin/perl -w
+
+my $input_file = '';
+my $ori_string = '';
+my $new_string = '';
+my $output_string = '';
+my $output_file = '';
+
+while ($#ARGV != -1)
+{
+	push (@arguments, $ARGV[0]);
+	shift (@ARGV);
+}
+if ($#arguments > -1)
+{
+	$input_file = shift @arguments;
+	$ori_string = shift @arguments;
+	$new_string = shift @arguments;
+	$output_file = shift @arguments;
+}
+
+open (FILE_HANDLE, "<$input_file") or die "ERROR: Cannot open $input_file\n";
+while (<FILE_HANDLE>) {
+#	print "$_";
+	$_ =~ s/$ori_string/$new_string/g;
+	$output_string = $output_string .$_;
+#	print "$_";
+}
+close FILE_HANDLE;
+
+open (FILE_HANDLE,">$output_file") or die "ERROR: Cannot open $include_tmp\n";
+print FILE_HANDLE $output_string;
+close FILE_HANDLE;