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L70 Quectel GPS Engine EVB User Guide L70_EVB_UGD_V1.0
Transcript of L70 EVB UGD V1 - eddywireless.com · L70_EVB_UGD_V1.0 - 16 - on. Explanations are listed in Table...
L70 Quectel GPS Engine
EVB User Guide L70_EVB_UGD_V1.0
L70 EVB User Guide
L70_EVB_UGD_V1.0 - 1 -
Document Title L70 EVB User Guide
Version 1.0
Date 2012-07-17
Status Released
Document Control ID L70_EVB_UGD_V1.0
General Notes
Quectel offers this information as a service to its customers, to support application and
engineering efforts that use the products designed by Quectel. The information provided is
based upon requirements specifically provided for customers of Quectel. Quectel has not
undertaken any independent search for additional information, relevant to any information
that may be in the customer’s possession. Furthermore, system validation of this product
designed by Quectel within a larger electronic system remains the responsibility of the
customer or the customer’s system integrator. All specifications supplied herein are subject to
change.
Copyright
This document contains proprietary technical information of Quectel Co., Ltd. Copying of
this document, distribution to others and communication of the contents thereof, are forbidden
without permission. Offenders are liable to the payment of damages. All rights are reserved in
the event of a patent grant or registration of a utility model or design.
Copyright © Quectel Wireless Solutions Co., Ltd. 2012
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Contents
Contents ............................................................................................................................................ 2
Table Index ........................................................................................................................................ 3
Figure Index ...................................................................................................................................... 4
0. Revision history ............................................................................................................................ 5
1. Introduction ................................................................................................................................... 6
1.1. Reference ............................................................................................................................. 6
1.2. Abbreviations ...................................................................................................................... 6
2. EVB Kit Introduction .................................................................................................................... 7
2.1. EVB Top and Bottom View ................................................................................................. 7
2.2. EVB Accessories ................................................................................................................. 8
3. Interface Application ..................................................................................................................... 9
3.1. Power Interface ................................................................................................................... 9
3.2. UART Interface ................................................................................................................... 9
3.3. Antenna Interface .............................................................................................................. 10
3.4. Switches and Buttons ........................................................................................................ 10
3.5. Operating Status LEDs ...................................................................................................... 11
3.6. Test Points ......................................................................................................................... 12
4. EVB and Accessories .................................................................................................................. 13
5. Installing Device Driver .............................................................................................................. 14
6. Starting MiniGPS ........................................................................................................................ 15
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Table Index
TABLE 1: REFERENCE .......................................................................................................................... 6
TABLE 2: ABBREVIATIONS ................................................................................................................. 6
TABLE 3: PINS OF UART PORT ......................................................................................................... 10
TABLE 4: SWITCHES AND BUTTONS .............................................................................................. 11
TABLE 5: OPERATING STATUS LEDS .............................................................................................. 11
TABLE 6: PINS OF X101 ...................................................................................................................... 12
TABLE 7: EXPLANATIONS OF MINIGPS WINDOW ....................................................................... 16
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Figure Index
FIGURE 1: EVB TOP VIEW ................................................................................................................... 7
FIGURE 2: EVB BOTTOM VIEW ......................................................................................................... 7
FIGURE 3: EVB ACCESSORIES ........................................................................................................... 8
FIGURE 4: POWER INTERFACE .......................................................................................................... 9
FIGURE 5: UART INTERFACE ............................................................................................................. 9
FIGURE 6: ANTENNA INTERFACE ................................................................................................... 10
FIGURE 7: SWITCHES AND BUTTONS ............................................................................................ 10
FIGURE 8: OPERATING STATUS LEDS ............................................................................................ 11
FIGURE 9: TEST POINTS X101 .......................................................................................................... 12
FIGURE 10: EVB AND ACCESSORY EQUIPMENTS ....................................................................... 13
FIGURE 11: MINIGPS TOOL ............................................................................................................... 15
FIGURE 12: COLD START AND HOT START ................................................................................... 17
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0. Revision history
Revision Date Author Description of change
1.0 2012-07-13 King HAO Initial
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1. Introduction
This document defines and specifies the usage of L70 EVB (Evaluation Board). Customer can get
useful information about L70 EVB and GPS demo tool from this document.
1.1. htReference
Table 1: Reference
SN Document name Remark
[1] L70_HD L70 Hardware Design
[2] L70_GPS_Protocol L70 GPS Protocol Specification
[3] L70_Reference Design L70 Reference Design
1.2. Abbreviations
Table 2: Abbreviations
Abbreviation Description
CNR Carrier-to-Noise Ratio
GPS Global Positioning System
LED Light Emitting Diode
PPS Pulse Per Second
PRN Pseudorandom Noise
SPS Standard Positioning Service
SV Satellite Vehicle
UART Universal Asynchronous Receiver & Transmitter
UTC Universal Time Coordinated
WGS84 World Geodetic System 1984
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2. EVB Kit Introduction
2.1. EVB Top and Bottom View
Figure 1: EVB top view
Figure 2: EVB bottom view
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A: UART port
B: Adapter interface
C: POWER switch
D: STANDBY switch
E: RESET button
F: Indication LEDs
G: Test points
H: L70 Module
I: Antenna interface
2.2. EVB Accessories
Figure 3: EVB accessories
A: GPS active antenna (3.3V)
B: DC5V/2A power adapter
C: USB to RS232 converter cable
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3. Interface Application
3.1. Power Interface
Figure 4: Power interface
3.2. UART Interface
Figure 5: UART interface
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Table 3: Pins of UART port
Pin Signal I/O Description
2 TXD O Transmit data
3 RXD I Receive data
5 GND GND
3.3. Antenna Interface
Figure 6: Antenna interface
3.4. Switches and Buttons
Figure 7: Switches and buttons
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Table 4: Switches and buttons
Part Name I/O Description
S1 POWER I Control power supply from adapter
S2
STANDBY
I
The module will enter into standby mode
when switching from OFF to ON, and exit
from standby mode in the opposite
operation.
K1 STANDBY I
The module will enter into standby mode
when pressing this button, and exit from
standby mode when releasing this button.
K2 RESET I Press and release this button, then the
module will reset.
3.5. Operating Status LEDs
Figure 8: Operating status LEDs
Table 5: Operating status LEDs
Part Name I/O Description
L1 PWR O Bright: Power on
Extinct: Power off
L2 TXD1 O
Flash: turn on successfully,UART1 port can output
messages
Extinct: failed to turn on the module
L3 1PPS O Flash: fix successfully, the frequency is 1Hz
Extinct: no fix
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3.6. Test Points
Figure 9: Test points X101
Table 6: Pins of X101
Pin Signal I/O Description
1 TXD1 O Transmit data
2 RXD1 I Receive data
3 1PPS O 1 pulse per second
4 V_BAKP I Backup voltage supply
5 VCC I Voltage supply for L70 module
6 TXD2 O Transmit data
7 RXD2 I Receive data
8 GND Ground
9 STANDBY I Enter or exit from standby mode
10 RESET I System reset
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4. EVB and Accessories
The EVB and its accessories are equipped as shown in Figure 10.
Figure 10: EVB and accessory equipments
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5. Installing Device Driver
Before using UART1 port, please install the driver of USB 2.0 to RS232 converter in the attached
CD.
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6. Starting MiniGPS
The MiniGPS tool can help user to view the status of GPS receiver conveniently. The operation
window is shown below:
Figure 11: MiniGPS tool
After assembling EVB accessories, turn on the module and start up the MiniGPS. Select a correct
COM port and baud rate (L70 module supports 9600bps by default), click the button “Open”.
When PC gets any message from the COM port, a yellow dot will be flashing at the upper right
corner of the Sky Chart.
From the MiniGPS window, user can view CNR message, time, position, speed, precision and so
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on. Explanations are listed in Table 7.
Table 7: Explanations of MiniGPS window
Icon Explanation
SV with PRN 30. 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, i.e., the CNR of the satellite is greater than 0.
Light blue means this satellite is not in tracking, i.e., its CNR is less
than 0.
UTC time
Latitude and longitude degree
Altitude based on WGS84 Datum
Fix type: NoFix, 3D or 2D SPS
Speed of receiver
Track degree of receiver
Position Dilution of Precision
Horizontal Dilution of Precision
Vertical Dilution of Precision
The CNR of PRN 26 is 37dB/Hz. Blue column means the navigation
data of this satellite is in use.
The CNR of PRN 19 is 21dB/Hz. White column means the navigation
data of this satellite is not in use.
User can drive L70 to implement Hot Start, Warm Start or Cold Start via Start Command buttons.
Positioning time will be indicated in the Message Bar as shown in the 2 screenshots below:
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Figure 12: Cold Start and Hot Start
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Shanghai Quectel Wireless Solutions Co., Ltd.
Room 501, Building 13, No.99, TianZhou Road, Xuhui District, Shanghai, China 200233 Tel: +86 21 5108 6236
Mail: [email protected]
