L80 EVB User Guide GPS Module Series Rev. L80_EVB_User_Guide_V1.0 Date: 2013-07-25 www.quectel.com GPS Module L80 EVB User Guide Our aim is to provide customers with timely and comprehensive service. For any assistance, please contact our company headquarter: Quectel Wireless Solutions Co., Ltd. Room 501, Building 13, No.99, Tianzhou Road, Shanghai, China, 200233 Tel: +86 21 5108 6236 Mail: info@quectel.com Or our local office, for more information, please visit: l e t l c a i e t u n Q fide n o C http://www.quectel.com/support/salesupport.aspx For technical support, to report documentation errors, please visit: http://www.quectel.com/support/techsupport.aspx GENERAL NOTES QUECTEL OFFERS THIS INFORMATION AS A SERVICE TO ITS CUSTOMERS. THE INFORMATION PROVIDED IS BASED UPON CUSTOMERS REQUIREMENTS. QUECTEL MAKES EVERY EFFORT TO ENSURE THE QUALITY OF THE INFORMATION IT MAKES AVAILABLE. 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L80_EVB_User_Guide Confidential / Released 1 / 20 GPS Module L80 EVB User Guide About the document History Revision 1.0 l e t l c a i e t u n Q fide n o C Date Author Description 2013-07-25 Ada LI Initial L80_EVB_User_Guide Confidential / Released 2 / 20 GPS Module L80 EVB User Guide Contents About the document ................................................................................................................................... 2 Contents ....................................................................................................................................................... 3 Table Index ................................................................................................................................................... 4 Figure Index ................................................................................................................................................. 5 1 Introduction .......................................................................................................................................... 6 2 Introduction to EVB Kit ....................................................................................................................... 7 2.1. EVB Top and Bottom View .......................................................................................................... 7 2.2. EVB Accessories ......................................................................................................................... 9 3 Interface Application ......................................................................................................................... 10 3.1. USB Interface ............................................................................................................................ 10 3.2. UART Interface.......................................................................................................................... 11 3.3. Antenna Interface ...................................................................................................................... 12 3.4. Switches and Buttons ............................................................................................................... 13 3.5. Test Point................................................................................................................................... 14 4 5 6 EVB and Accessories ........................................................................................................................ 15 Install Device Driver........................................................................................................................... 16 Starting PowerGPS ............................................................................................................................ 17 7 Appendix A Reference....................................................................................................................... 20 l e t l c a i e t u n Q fide n o C L80_EVB_User_Guide Confidential / Released 3 / 20 GPS Module L80 EVB User Guide Table Index TABLE 1: EVB BOTTOM VIEW ........................................................................................................................... 8 TABLE 2: EVB ACCESSORIES .......................................................................................................................... 9 TABLE 3: PINS OF UART PORT ....................................................................................................................... 11 TABLE 4: SWITCHES AND BUTTONS ............................................................................................................. 13 TABLE 5: THE DESCRIPTION OF TEST POINTS ........................................................................................... 14 TABLE 6: EXPLANATIONS OF POWERGPS WINDOW .................................................................................. 18 TABLE 7: REFERENCE .................................................................................................................................... 20 TABLE 8: ABBREVIATIONS .............................................................................................................................. 20 l e t l c a i e t u n Q fide n o C L80_EVB_User_Guide Confidential / Released 4 / 20 GPS Module L80 EVB User Guide Figure Index FIGURE 1: EVB TOP VIEW ................................................................................................................................ 7 FIGURE 2: EVB BOTTOM VIEW ........................................................................................................................ 8 FIGURE 3: EVB ACCESSORIES ........................................................................................................................ 9 FIGURE 4: MICRO-USB INTERFACE .............................................................................................................. 10 FIGURE 5: UART INTERFACE .......................................................................................................................... 11 FIGURE 6: ANTENNA INTERFACE .................................................................................................................. 12 FIGURE 7: SWITCHES AND BUTTONS .......................................................................................................... 13 FIGURE 8: TEST POINTS................................................................................................................................. 14 l e t l c a i e t u n Q fide n o C FIGURE 9: EVB AND ACCESSORY EQUIPMENTS ........................................................................................ 15 FIGURE 10: POWERGPS TOOL ...................................................................................................................... 17 FIGURE 11: COM PORT AND BAUD ................................................................................................................ 17 L80_EVB_User_Guide Confidential / Released 5 / 20 GPS Module L80 EVB User Guide 1 Introduction This document defines and specifies the usage of L80 EVB (Evaluation Board). You can get useful information about L80 EVB and GPS demo tool from this document. l e t l c a i e t u n Q fide n o C L80_EVB_User_Guide Confidential / Released 6 / 20 GPS Module L80 EVB User Guide 2 Introduction to EVB Kit 2.1. EVB Top and Bottom View l e t l c a i e t u n Q fide n o C Figure 1: EVB Top View L80_EVB_User_Guide Confidential / Released 7 / 20 GPS Module L80 EVB User Guide l e t l c a i e t u n Q fide n o C Figure 2: EVB Bottom View Table 1: EVB Bottom View Index A B C D E Description UART port Serial port alternation switch RESET button FORCE_ON Micro-USB port F POWER switch G PATCH Antenna H L80 Module I Active Antenna interface L80_EVB_User_Guide Confidential / Released 8 / 20 GPS Module L80 EVB User Guide J Test points 2.2. EVB Accessories l e t l c a i e t u n Q fide n o C Figure 3: EVB Accessories Table 2: EVB Accessories Index A L80_EVB_User_Guide Description USB cable Confidential / Released 9 / 20 GPS Module L80 EVB User Guide 3 Interface Application 3.1. USB Interface l e t l c a i e t u n Q fide n o C Figure 4: Micro-USB Interface The main power is supplied via Micro-USB interface. Quectel provides two ways for data communication: Micro-USB and UART interface which are controlled by serial port alternation switch (S401). Both of RS232 and Micro-USB cable are necessary, if you want to use UART in order to output NEMA. So the easy way is that use Micro-USB cable which both provides the power and output NEMA. You can make alternation between UART port and Micro-USB interface via switch (S401). L80_EVB_User_Guide Confidential / Released 10 / 20 GPS Module L80 EVB User Guide 3.2. UART Interface l e t l c a i e t u n Q fide n o C Figure 5: UART Interface Table 3: Pins of UART Port Pin 2 3 5 Signal I/O Description RXD I Receive data TXD O Transmit data GND L80_EVB_User_Guide GND Confidential / Released 11 / 20 GPS Module L80 EVB User Guide 3.3. Antenna Interface l e t l c a i e t u n Q fide n o C Figure 6: Antenna Interface L80_EVB_User_Guide Confidential / Released 12 / 20 GPS Module L80 EVB User Guide 3.4. Switches and Buttons l e t l c a i e t u n Q fide n o C Figure 7: Switches and Buttons Table 4: Switches and Buttons Part S1 S2 K1 K2 Name Serial port switch POWER alternation I/O Description I QUECTEL EVB supplies two communicative ways: Micro-USB and UART which are controlled by switch. I Control power supply via Micro-USB. Logic high will force module to be waked up from backup mode. FORCE_ON RESET L80_EVB_User_Guide I Press and release this button, then the module will reset. Confidential / Released 13 / 20 GPS Module L80 EVB User Guide 3.5. Test Point l e t l c a i e t u n Q fide n o C Figure 8: Test Points Table 5: The Description of Test Points Pin 1 2 3 4/6 5 7 Signal I/O Description TXD1 O Transmit data RXD1 I Receive data RESET I System reset GND 1PPS TIMER L80_EVB_User_Guide Ground O 1 pulse per second O Logic high will force module to be waked up from backup mode. Keep this pin open or pulled low before entering into backup mode. If unused, keep this pin open. Confidential / Released 14 / 20 GPS Module L80 EVB User Guide 4 EVB and Accessories The EVB and its accessories are equipped as shown in Figure 9. l e t l c a i e t u n Q fide n o C Figure 9: EVB and Accessory Equipments NOTE The GPS active antenna is not included in L80EVB-KIT. It can be purchased separately by Quectel Sales Team, if it is necessary for your application. L80_EVB_User_Guide Confidential / Released 15 / 20 GPS Module L80 EVB User Guide 5 Install Device Driver Please note that you need to install the driver of Micro-USB, when using Micro-USB for data communication. The driver has been stored in our FTP server. The driver of CP210x also can be downloaded from internet. The download path of our FTP server is shown as below: Overseas l e t l c a i e t u n Q fide n o C customer: /d:/FTP/OC/Overseas_Technical/Overseas_Module Official Documents/GNSS Module/Common/04 Tool Kit/ GNSS_EVB_Micro-USB_Driver_CP210x. Domestic customer: /d:/FTP/CC/Domestic_Technical/Domestic_Module Official Documents/GNSS Module/Common/04 Tool Kit/ GNSS_EVB_Micro-USB_Driver_CP210x. L80_EVB_User_Guide Confidential / Released 16 / 20 GPS Module L80 EVB User Guide 6 Starting PowerGPS The PowerGPS version is V2.2.0. The PowerGPS tool can help user to view the status of GPS receiver conveniently. When the tool is opened, the following window will be displayed: l e t l c a i e t u n Q fide n o C Figure 10: PowerGPS Tool After EVB accessories are assembled, turn on the module and start up the PowerGPS. Select a correct COM port and baud rate (L80 module supports 9600bps by default), then click the button "Create Connection". Figure 11: COM Port and Baud From the PowerGPS window, user can view CNR message, time, position, speed, precision and so on. Explanations are listed in Table 6. L80_EVB_User_Guide Confidential / Released 17 / 20 GPS Module L80 EVB User Guide Table 6: Explanations of PowerGPS Window Icon Explanation SV with PRN 20. 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. l e t l c a i e t u n Q fide n o C The CNR of PRN 27 is 48dB/Hz. Light blue column means the navigation data of this satellite is in use. The CNR of PRN 50 is 40dB/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 You can send PMTK command by PowerGPS. The format of PMTK command is included only characters between $ and *, for example: PMTK869,0. L80_EVB_User_Guide Confidential / Released 18 / 20 GPS Module L80 EVB User Guide l e t l c a i e t u n Q fide n o C Figure 12: MTK Command L80_EVB_User_Guide Confidential / Released 19 / 20 GPS Module L80 EVB User Guide 7 Appendix A Reference Table 7: Reference SN [1] [2] [3] Document name Remark l e t l c a i e t u n Q fide n o C L80_Hardware_Design L80 Hardware Design L80_Protocol_Specification L80 Protocol Specification L80_Reference Design L80 Reference Design Table 8: Abbreviations Abbreviation CNR GPS PPS PRN SPS SV UART UTC WGS84 Description Carrier-to-Noise Ratio Global Positioning System Pulse Per Second Pseudorandom Noise Standard Positioning Service Satellite Vehicle Universal Asynchronous Receiver & Transmitter Universal Time Coordinated World Geodetic System 1984 L80_EVB_User_Guide Confidential / Released 20 / 20