Sierra Wireless Writing an embedded application loader Application Note

Application Note

Writing an embedded

application loader

First edition (January 2005)

Sony Ericsson Mobile Communications. publishes this manual without making
any warranty as to the content contained herein. Further Sony Ericsson Mobile
Communications. reserves the right to make modifications, additions and
deletions to this manual due to typographical errors, inaccurate information, or
improvements to programs and/or equipment at any time and without notice.
Such changes will, nevertheless be incorporated into new editions of this
manual.

All rights reserved.

© Sony Ericsson Mobile Communications., 2005

WRITING AN EMBEDDED APPLICATION LOADER

LZT 123 8094 P1A 3

Contents

1 Introduction ........................................................................................4

2 Overview .............................................................................................5

2.1 AT commands ...........................................................................................5

2.2 The first packet..........................................................................................5

2.3 Subsequent packets ..................................................................................6

2.3.1 Xmodem-CRC Protocol (CCITT) ...................................................6

2.4 SLP DLL tool .............................................................................................9