Telit Wireless Solutions Jupiter SL869 Manuale utente

SL869 SW User Guide

1VV0301002 Rev.6 – 2013-10-1

SL869 SW User Guide

1VV0301002 Rev.6 – 2013-10-1

Mod. 0806 2011-07 Rev.2

APPLICABILITY TABLE

PRODUCT

SL869

SW Version

3.1.12.3

SL869 SW User Guide

1VV0301002 Rev.6 – 2013-10-1

Mod. 0806 2011-07 Rev.2

SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE

Notice

While reasonable efforts have been made to assure the accuracy of this document, Telit

assumes no liability resulting from any inaccuracies or omissions in this document, or from

use of the information obtained herein. The information in this document has been carefully

checked and is believed to be entirely reliable. However, no responsibility is assumed for

inaccuracies or omissions. Telit reserves the right to make changes to any products described

herein and reserves the right to revise this document and to make changes from time to time

in content hereof with no obligation to notify any person of revisions or changes. Telit does

not assume any liability arising out of the application or use of any product, software, or

circuit described herein; neither does it convey license under its patent rights or the rights of

others.

It is possible that this publication may contain references to, or information about Telit

products (machines and programs), programming, or services that are not announced in your

country. Such references or information must not be construed to mean that Telit intends to

announce such Telit products, programming, or services in your country.

Copyrights

This instruction manual and the Telit products described in this instruction manual may be,

include or describe copyrighted Telit material, such as computer programs stored in

semiconductor memories or other media. Laws in the Italy and other countries preserve for

Telit and its licensors certain exclusive rights for copyrighted material, including the

exclusive right to copy, reproduce in any form, distribute and make derivative works of the

copyrighted material. Accordingly, any copyrighted material of Telit and its licensors

contained herein or in the Telit products described in this instruction manual may not be

copied, reproduced, distributed, merged or modified in any manner without the express

written permission of Telit. Furthermore, the purchase of Telit products shall not be deemed

to grant either directly or by implication, estoppel, or otherwise, any license under the

copyrights, patents or patent applications of Telit, as arises by operation of law in the sale of a

product.

Computer Software Copyrights

The Telit and 3rd Party supplied Software (SW) products described in this instruction manual

may include copyrighted Telit and other 3rd Party supplied computer programs stored in

semiconductor memories or other media. Laws in the Italy and other countries preserve for

Telit and other 3rd Party supplied SW certain exclusive rights for copyrighted computer

programs, including the exclusive right to copy or reproduce in any form the copyrighted

computer program. Accordingly, any copyrighted Telit or other 3rd Party supplied SW

computer programs contained in the Telit products described in this instruction manual may

not be copied (reverse engineered) or reproduced in any manner without the express written

permission of Telit or the 3rd Party SW supplier. Furthermore, the purchase of Telit products

shall not be deemed to grant either directly or by implication, estoppel, or otherwise, any

license under the copyrights, patents or patent applications of Telit or other 3rd Party supplied

SW, except for the normal non-exclusive, royalty free license to use that arises by operation

of law in the sale of a product.

SL869 SW User Guide

1VV0301002 Rev.6 – 2013-10-1

Mod. 0806 2011-07 Rev.2

Usage and Disclosure Restrictions

License Agreements

The software described in this document is the property of Telit and its licensors. It is

furnished by express license agreement only and may be used only in accordance with the

terms of such an agreement.

Copyrighted Materials

Software and documentation are copyrighted materials. Making unauthorized copies is

prohibited by law. No part of the software or documentation may be reproduced, transmitted,

transcribed, stored in a retrieval system, or translated into any language or computer language,

in any form or by any means, without prior written permission of Telit

High Risk Materials

Components, units, or third-party products used in the product described herein are NOT

fault-tolerant and are NOT designed, manufactured, or intended for use as on-line control

equipment in the following hazardous environments requiring fail-safe controls: the operation

of Nuclear Facilities, Aircraft Navigation or Aircraft Communication Systems, Air Traffic

Control, Life Support, or Weapons Systems (High Risk Activities"). Telit and its supplier(s)

specifically disclaim any expressed or implied warranty of fitness for such High Risk

Activities.

Trademarks

TELIT and the Stylized T Logo are registered in Trademark Office. All other product or

service names are the property of their respective owners.

SL869 SW User Guide

1VV0301002 Rev.6 – 2013-10-1

Mod. 0806 2011-07 Rev.2

Contents

1.Introduction .............................................................................................................7

1.1.Scope............................................................................................................................ 7

1.2.Audience....................................................................................................................... 7

1.3.Contact Information, Support ...................................................................................... 7

1.4.Document Organization ............................................................................................... 8

1.5.Text Conventions.......................................................................................................... 8

1.6.Related Documents ..................................................................................................... 8

2.Communication Interface.........................................................................................9

2.1.UART ............................................................................................................................ 9

2.2.NMEA Characteristics.................................................................................................. 9

2.3.Commands ................................................................................................................. 10

2.4.Messages ................................................................................................................... 10

3.Commands Description..........................................................................................11

3.1.$PSTMINITGPS .......................................................................................................... 12

3.2.$PSTMINITTIME......................................................................................................... 13

3.3.$PSTMCLREPHS........................................................................................................ 14

3.4.$PSTMDUMPEPHEMS ............................................................................................... 14

3.5.$PSTMEPHEM............................................................................................................ 15

3.6.$PSTMNMEAONOFF.................................................................................................. 16

3.7.$PSTMCOLD............................................................................................................... 16

3.8.$PSTMWARM ............................................................................................................. 17

3.9.$PSTMHOT................................................................................................................. 17

3.10.$PSTMSRR ............................................................................................................. 17

3.11.$PSTMGPSRESET................................................................................................... 18

3.12.$PSTMGETSWVER.................................................................................................. 18

3.13.$PSTMSBASONOFF................................................................................................ 19

3.14.$PSTMSBASSAT..................................................................................................... 19

4.Messages Description............................................................................................20

SL869 SW User Guide

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Mod. 0806 2011-07 Rev.2

4.1.GPGGA........................................................................................................................ 21

4.2.GNGSA........................................................................................................................ 22

4.3.--GSV .......................................................................................................................... 23

4.4.GPRMC ....................................................................................................................... 24

5.Document History ..................................................................................................25

SL869 SW User Guide

1VV0301002 Rev.6 – 2013-10-1

Mod. 0806 2011-07 Rev.2

1. Introduction

1.1. Scope

This document describes the serial communications interface between the SL869

GPS/GLONASS receiver module firmware and Host Processor software.

1.2. Audience

This document is intended for public distribution to potential customers who are evaluating

the SL869 GPS/GLONASS module. It can also be used by customers who are developing

application software for the Host Processor in a device that incorporates the SL869.

1.3. Contact Information, Support

For general contact, technical support, to report documentation errors and to order manuals,

contact Telit Technical Support Center (TTSC) at:

[email protected]

Alternatively, use:

http://www.telit.com/en/products/technical-support-center/contact.php

For detailed information about where you can buy the Telit modules or for recommendations

on accessories and components visit:

http://www.telit.com

To register for product news and announcements or for product questions contact Telit

Technical Support Center (TTSC).

Our aim is to make this guide as helpful as possible. Keep us informed of your comments and

suggestions for improvements.

Telit appreciates feedback from the users of our information.

SL869 SW User Guide

1VV0301002 Rev.6 – 2013-10-1

Mod. 0806 2011-07 Rev.2

1.4. Document Organization

This document contains the following chapters (sample):

“Chapter 1: “Introduction” provides a scope for this document, target audience, contact and

support information, and text conventions.

“Chapter 2: “Communication Interface” gives an overview of the serial communications

interface and describes general characteristics of input commands and output messages.

“Chapter 3: “Commands Description” describes in detail each of the input commands for the

SL869.

“Chapter 4: “Messages Description” describes in detail each of the output messages produced

by the SL869.

“Chapter 5: “Document History” provides of the changes made to this User Guide.

1.5. Text Conventions

Danger – This information MUST be followed or catastrophic equipment failure or bodily

injury may occur.

Caution or Warning – Alerts the user to important points about integrating the module, if

these points are not followed, the module and end user equipment may fail or malfunction.

Tip or Information – Provides advice and suggestions that may be useful when

integrating the module.

All dates are in ISO 8601 format, i.e. YYYY-MM-DD.

1.6. Related Documents

SL869 Product Description, 80405ST10105a

SL869 SW User Guide

1VV0301002 Rev.6 – 2013-10-1

Mod. 0806 2011-07 Rev.2

2. Communication Interface

The serial communication interface between the SL869 receiver module and the Host

processor is based on the NMEA-0183 protocol standard specified by the National Marine

Electronics Association (NMEA). This is an ASCII-based standard that is widely used in the

GPS industry for serial communication with GPS receivers.

2.1. UART

Serial communication with the SL869 is conducted over the UART port, which is assigned to

Pins 20 (Tx) and 21 (Rx). There is no hardware flow control. The default port settings are:

9600 Baud

Eight data bits

No parity bits

One stop bit

Note that manual user interaction with the SL869 can be achieved using a PC terminal

emulator.

2.2. NMEA Characteristics

This subsection highlights characteristics of the NMEA-0183 protocol as they pertain to the

SL869 interface.

Start And Termination

An NMEA data packet is transmitted as an ASCII string beginning with a “$” character, but it

is terminated with <carriage return> <line feed> character sequence. The hexadecimal

representation of this sequence is 0x0D 0x0A.

Proprietary Packets

Proprietary data packets are allowed by the NMEA protocol standard. They begin with “$P”

followed by a Manufacturer’s Mnemonic Code that is assigned by the NMEA. The SL869

module is based on the STA8088 device from ST Microelectronics, who has been assigned

the code “STM.” Therefore, proprietary packets used by the SL869 begin with the character

sequence “$PSTM.”

Checksums

The NMEA standard specifies a two-character checksum field that follows a ‘*” delimiting

character placed at the end of the ASCII data string. The checksum is calculated as the 8-bit

exclusive-OR (XOR) of all characters in the string, excluding the “$” and “*’ delimiters.

The SL869 includes checksums on all output NMEA messages. With one exception,

checksums are not required on input messages and if present are ignored by the SL869.

SL869 SW User Guide

1VV0301002 Rev.6 – 2013-10-1

Mod. 0806 2011-07 Rev.2

Packet Length

The NMEA standard specifies a maximum number of characters for each data packet, but the

SL869 does not strictly adhere to this limit.

2.3. Commands

Commands are sent from the Host Processor to the SL869 and have the basic structure

illustrated below:

command-ID[,parameter1,parameter2,…,parameterN]<cr><lf>

Parameters, if present, are delimited by “,” characters as per the NMEA protocol. All SL869

commands are proprietary and therefore all command-ID’s begin with the “$PSTM” character

sequence.

In most cases, the SL869 will echo the command back out to the Host Processor after the

command has been executed. Commands that are not echoed are indicated in the detailed

commands descriptions later in this Guide.

NOTE:

An easy way to send commands to the SL869 manually is to write the command to a text

file and use the “send text file” function of the terminal emulator. When doing so, make

sure that the <cr><lf> characters are transmitted at the end of the command.

2.4. Messages

Messages are sent from the SL869 to the Host Processor and have the basic structure

illustrated below:

message-ID,<data1,data2,…,dataN>*<checksum><cr><lf>

Individual data fields are delimited by “,” characters. The checksum is provided for purposes

of bit error detection by the Host if desired.

The SL869 outputs certain standard messages as defined in version 3.01 of the NMEA-0183

protocol standard. The message-ID for standard messages begins with an NMEA talker ID:

“$GP” indicating GPS, “$GL” indicating GLONASS, and “$GN” indicating global

navigation. Specific talker IDs used for each message are described later in this Guide in the

Messages section.

The SL869 also outputs proprietary messages. As with commands, proprietary message-IDs

begin with “$PSTM.” Note that some proprietary messages are responses to input commands.

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