Mobiletek N10/N20 EVB User manual

N10/N20 EVB User Manual
Copyright© Shanghai Mobiletek Communication Ltd. 1
N10/N20_EVB User Manual
GPS Module Series
Version：V1.1
Date：2017-10-16
Shanghai Mobiletek Communication Ltd.

N10/N20 EVB User Manual
Copyright© Shanghai Mobiletek Communication Ltd. 2
Notice
Some features of the product and its accessories described herein rely on the software installed,
capacities and settings of local network, and therefore may not be activated or may be limited by local
network operators or network service providers.
Thus, the descriptions herein may not exactly match the product or its accessories which you
purchase. Shanghai Mobiletek Communication Ltd reserves the right to change or modify any
information or specifications contained in this manual without prior notice and without any liability.
Copyright
This document contains proprietary technical information which is the property of Shanghai Mobiletek
Communication Ltd. copying of this document and giving it to others and the using or communication
of the contents thereof, are forbidden without express authority. Offenders are liable to the payment of
damages. All rights reserved in the event of grant of patent or the registration of a utility model or
design. All specification supplied herein are subject to change without notice at any time.
DISCLAIMER
ALL CONTENTS OF THIS MANUAL ARE PROVIDED “AS IS”. EXCEPT AS REQUIRED BY
APPLICABLE LAWS, NO WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED,
INCLUDINGBUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE, ARE MADE IN RELATION TO THE ACCURACY,
RELIABILITY OR CONTENTS OF THIS MANUAL.
TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, IN NO EVENT SHALL
SHANGHAI MOBILETEKCOMMUNICATION LTD BE LIABLE FOR ANY SPECIAL, INCIDENTAL,
INDIRECT, OR CONSEQUENTIAL DAMAGES, OR LOSS OF PROFITS, BUSINESS, REVENUE,
DATA, GOODWILL SAVINGS OR ANTICIPATED SAVINGS REGARDLESS OF WHETHER SUCH
LOSSES ARE FORSEEABLE OR NOT.
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N10/N20 EVB User Manual
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Version History
Date
Version
Modify records
Author
2016-09-11
V1.0
First release
Jason.liao
2017-10-16
V1.1
Optimized layout format
Change company logo
Jason Liao
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Content
1. Overview ...................................................................................................................3
1.1 EVB Top View.....................................................................................................3
1.2 EVB Accessories................................................................................................4
2. Application.................................................................................................................5
2.1 GPS Module.......................................................................................................5
2.2 Switch.................................................................................................................6
2.3 USB Interface.....................................................................................................6
2.4 Antenna Interface ...............................................................................................6
2.5 Status LEDs........................................................................................................7
2.6 Test Points..........................................................................................................7
3. EVB and Accessories................................................................................................9
4. USB Driver ..............................................................................................................10
5. PowerGPS...............................................................................................................11
5.1 PowerGPS panel..............................................................................................11
5.2 PMTK Command..............................................................................................13
5.3 Automatic TTFF Testing....................................................................................13
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1. Overview
This document defines and specifies the usage of N10/N20 EVB. You can know how to use N10/N20
EVB and GPS demo tool from this document.
1.1 EVB Top View
Figure 1-1 N10/N20 EVB Top View
1: Antenna Interface
2: N20 Module
3: N10 Module
4: TX Switch
5: RX Switch
6: Power Switch
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7: USB to UART IC
8: 5pin Micro USB
9: USB Power Indication LED
10: PPS Indication LED
11: Test Points
1.2 EVB Accessories
Figure 1-2 EVB Accessories
1: USB Cable
2: GPS active antenna (3.3V)
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2. Application
2.1 GPS Module
Figure 2-1 GPS Module
The EVB board can support two kinds of GPS Modules (N10 and N20) to test. Each GPS module has
different match circuit position seen as the arrows.
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2.2 Switch
Figure 2-2 Switch
The EVB board has three switches for the UART and Power of GPS module. All these three switches
should turn left when connect the module to the computer through the Micro-USB, like getting the
NEMA data or downloading the software.
2.3 USB Interface
The EVB board only provides one way for data communication. Micro-USB interface can also supply
the main power for the EVB, not need another power. You can cut the UART communication via the
switch (4, 5) and the power supply of GPS module via the switch (6).
2.4 Antenna Interface
Both the active antenna and passive antenna can be selected for the external antenna. Please note
the N10 and N20 have the different match circuits.
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2.5 Status LEDs
The EVK board has two indication LEDs. One is USB power indication (9) and another is PPS
indication (10). USB power indication led will light on when USB cable plugging. PPS indication led
will on when the GPS module outputs the PPS signal.
2.6 Test Points
Figure 2-3 Test Point
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Table 2-1: Pins of Test Point
Pin
Pin Name
I/O
Description
1
RX2
I
Receive data2
2
TX2
O
Transmit data2
3
SCS
O
Select signal of SPI
4
PPS
O
1 pulse per second
5
INT
I
Interrupt signal
6
RST
I
System reset
7
MOSI
I
Master output slave input of SPI
8
ANT_ON
O
External LNA control pin
9
SCK
O
Clock of SPI
10
MISO
O
Maser input slave output of SPI
11
SCL
O
Clock of IIC
12
SDA
O
Data of IIC
13
TX0
I
Transmit data2
14
RX0
O
Receive data2
15
VGPS
I
GPS Module Power Supply
16
GND
I
GND
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3. EVB and Accessories
The EVB and its accessories are showed as follow figure which tell user how to connect them.
Figure 3-1 EVB and Accessory Equipments
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4. USB Driver
You need to install the driver of Micro-USB, when use Micro-USB for data communication. Please get
the driver from our FAE of Mediatek Company or download them from internet.
We have two different driver ICs for the Micro-USB. These download paths are as below:
http://www.ftdichip.com/Drivers/CDM/CDM21218_Setup.zip
http://www.prolific.com.tw/US/ShowProduct.aspx?p_id=225&pcid=41
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5. PowerGPS
5.1 PowerGPS panel
The PowerGPS version is V2.3.3. The PowerGPS tool can help customer to view the status of
GPS&GLONASS&BDS receiver. When the tool is opened, the following window will be displayed:
Figure 5-1 PowerGPS
Assemble the EVB accessories, supply power to the module, start up the PowerGPS, select a correct
COM port and baud rate (N10 module supports 9600bps by default), then click the button “Create
Connection”
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From the window, customer can find CNR message, time, position, speed, precision and so on. More
detail information are listed in Table 5.
Table 5 Explanations of PowerGPS Window
Icon
Explanation
SV with PRN G19. If the position of SV is near to the
centre of the Sky View, the elevation angle of SV is
close to 90°. Dark blue means this satellite is in
tracking.
Light blue means this satellite is not in tracking.
The CNR of PRN B8 is 41dB/Hz. Light blue column
means the navigation data of this satellite is in use.
The CNR of PRN G12 is 27dB/Hz. White column
means the navigation data of this satellite is not in
use.
UTC time
Latitude degree
longitude degree
Positing fix
Using the number of satellites
Horizontal Dilution of Precision
Altitude based on WGS84 Datum
UTC date
Fix type: No-Fix, 3D or 2D SPS
Using satellite
Position Dilution of Precision
Vertical Dilution of Precision
Speed of receiver
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5.2 PMTK Command
You can send PMTK command by PowerGPS, for example PMTK605. For more PMTK command,
Please refer to the related documents.
Figure 5-2 PMTK Command
5.3 Automatic TTFF Testing
This tool can measure the TTFF (Time to First Fix) under different testing conditions, like full start,
cold start, warm start and hot start. And the number of tests can be chosen from 1, 10, 20, 100, 1000
and 10000. Click the Run button to start the test and click the Stop button to stop. The configuration is
as below. Start “MTK” menu, and click “Static TTFF Testing”, then “Static TTFF Testing”.
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Figure 5-3 TTFF Test
Click “Set reference point”, and “Reference location”. After start positioning, click “Use Mean Position”
and “OK”.
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Figure 5-4 Static TTFF Testing Configuration Options
Click “Config”, set “TTFF Time- out (sec)”, then click “OK”:
Generally, if you want to choose hot start, warm start or cold start, “TTFF Time-out (sec)” sets 10s,
50s or 100s. “TTFF Time–out (sec)” can help you judge TTFF and save time.
Figure 5-5 Static TTFF Testing Configuration
After completed, click on the Run button to start the test and click on the Stop button to stop. After
finishing the testing, you can see the testing result charts. The result will be stored in the tool
installation path, and you can view the corresponding log.
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