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Related Manuals for Ublox EVK-M8U
Summary of Contents for Ublox EVK-M8U
- Page 1 EVK-M8U Evaluation kit User guide Abstract This document describes the structure and use of the EVK-M8U evaluation kit and provides information for evaluating and testing u-blox M8 Untethered Dead Reckoning (UDR) positioning technology. www.u-blox.com UBX-15023994 - R06 C1-Public...
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Page 2: Document Information
European Union regulatory compliance EVK-M8U complies with all relevant requirements for RED 2014/53/EU. The EVK-M8U Declaration of Conformity (DoC) is available at www.u-blox.com within Support > Product resources > Conformity Declaration. u-blox or third parties may hold intellectual property rights in the products, names, logos and designs included in this document. -
Page 3: Table Of Contents
3.3.10 GNSS configuration .........................10 Setting up .............................. 11 4.1 EVK-M8U installation ..........................11 4.1.1 Mounting the GNSS antenna ......................11 4.1.2 Mounting the EVK-M8U ........................11 4.1.3 Connecting the cables ........................12 4.2 Recommended configuration .........................12 4.2.1 Serial port default configuration ....................12 4.2.2 UDR configuration ..........................12 4.3 UDR operation ............................14... - Page 4 EVK-M8U - User guide 12 Common evaluation pitfalls ......................27 Related documents ........................... 28 Revision history ............................28 Contact ................................29 UBX-15023994 - R06 Page 4 of 29 C1-Public Contents...
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Page 5: Product Description
Product description 1.1 Overview The EVK-M8U evaluation kit simplifies the evaluation of the high performance u-blox M8 Untethered Dead Reckoning positioning products. The built-in USB interface provides both power supply and high-speed data transfer, and eliminates the need for an external power supply. The u-blox evaluation kits are compact, and their user-friendly interface and power supply make them ideally suited for use in laboratories, vehicles and outdoor locations. -
Page 6: Specifications
Contact u-blox technical support for assistance if required. 2.1 Safety precautions EVK-M8U must be supplied by an external limited power source in compliance with clause 2.5 of the standard IEC 60950-1. In addition to an external limited power source, only separated or Safety Extra- Low Voltage (SELV) circuits are to be connected to the evaluation kit, including interfaces and antennas. -
Page 7: Device Description
Figure 1: Connecting the unit for power supply and communication 3.2 Active antenna The EVK-M8U evaluation kit includes a GPS / Galileo / GLONASS / BeiDou antenna with a 3-meter cable. It is possible to connect various active and passive GNSS antennas with SMA connectors to the evaluation unit. -
Page 8: Usb
RXD, GNSS Receive Data, serial data from DTE not connected not connected not connected Table 3: SUB-D9 connector pin descriptions for the EVK-M8U 3.3.4 RST button The RST button on the front panel resets the unit. To avoid an inadvertent reset, the button is recessed. -
Page 9: Front Test Connector
If slide switch is on SPI, the SPI interface is selected; Master out Slave in (MOSI) Common ground pin Table 4: Connector pin descriptions for the EVK-M8U (pins numbered from right to left on the front panel) ⚠ THE EVK CASE-WORK IS CONNECTED TO THE COMMON SUPPLY/INTERFACE GROUND PIN (PIN 13). -
Page 10: Led
UBX-CFG-TP5 message. The time pulse may be configured so that the LED starts flashing at one pulse per second during a valid GNSS fix. If there is no GNSS fix, the LED will only be lit, without flashing. The time pulse is enabled by default in the EVK-M8U. 3.3.9 Backup battery The evaluation unit includes a backup battery. -
Page 11: Setting Up
4.1.2 Mounting the EVK-M8U The EVK-M8U should be firmly attached to the car body so as to avoid any movement or vibration with respect to the car body. The EVK should not be attached to any ‘live’ (unsprung) part of the vehicle’s suspension. -
Page 12: Connecting The Cables
Only NMEA messages are activated Table 6: Default configuration 4.2.2 UDR configuration By default, the EVK-M8U is ready to operate in UDR navigation mode. The following sections describe how to configure the parameters specific to the installation. 4.2.2.1 Sensor/IMU mount angles configuration Dead reckoning performance relies on accurate configuration of the sensor mount configuration angles. - Page 13 (yaw, pitch, roll) shall be issued again. For example, in the basic use case when the EVK-M8U is mounted flat (label side up) and X-axis on the label is pointing forward, the user should configure it in UBX-CFG-ESFALG as (yaw, pitch, roll) = (0,0,0).
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Page 14: Udr Operation
EVK-M8U - User guide Figure 5: u-center showing how to save current configuration with UBX-CFG-CFG 4.3 UDR operation The sections below describes the UDR operation modes. 4.3.1.1 Initialization mode The purpose of the Initialization phase is to estimate all unknown parameters which are required for achieving fusion. - Page 15 EVK-M8U - User guide Figure 6: Screenshot of u-center showing the INITIALIZING mode in UBX-ESF-STATUS message 4.3.1.2 Fusion mode Once the initialization phase is achieved, the receiver enters navigation mode and starts to compute combined GNSS/Dead-reckoning fixes and to calibrate the sensor required for computing the fused navigation solution.
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Page 16: Accelerated Initialization And Calibration Procedure
EVK-M8U - User guide 4.4 Accelerated initialization and calibration procedure This section describes how to perform fast initialization and calibration of the UDR receiver for evaluation purposes. The duration of the initialization phase mostly depends on the quality of the GNSS signals and the dynamics encountered by the vehicle. -
Page 17: Test Drives
EVK-M8U - User guide Test drives ☞ Before testing can be done, make sure that the initialization and calibration have been completed according to chapter 4. We recommend recording and archiving the data of your test drives. You can enable additional debug messages by clicking the Debug button, and then clicking the Record button (see Figure 8). -
Page 18: Measuring Tracking Current
EVK-M8U - User guide Measuring tracking current To measure the NEO-M8U module tracking current with the EVK-M8U, follow these steps: 1. Connect a mean reading voltmeter across P1A (VCC) and P1B of the front connector (see Figure 10). 2. Wait 12 minutes to download all of the GNSS orbital data, or download all the Aiding Data via the AssistNow Online service. -
Page 19: Block Diagram
EVK-M8U - User guide Block diagram Figure 11: EVK-M8U block diagram UBX-15023994 - R06 Block diagram Page 19 of 29 C1-Public... -
Page 20: Board Layout
EVK-M8U - User guide Board layout Figure 12 shows the EVK-M8U board layout (PCB Version D). See Table 7 for the component list of the EVB. Figure 12: EVK-M8U layout UBX-15023994 - R06 Board layout Page 20 of 29 C1-Public... - Page 21 EVK-M8U - User guide PART DESCRIPTION GNSS RECEIVER -40/+85 °C BATTERY HOLDER RENATA CR2450N 3 V C1, C11, C13, C22 CAP CER X5R 0603 1U0 10% 6.3 V C10, C14, C16, C19, C2, C6, C7 C8 CAP CER X7R 0603 100N 10% 10 V...
- Page 22 EVK-M8U - User guide RS-232 TRANSCEIVER 1MBIT 3-5,5VOLT TRSF3223 – VQFN20 5.5V -40/+85 °C TINY LOGIC ULP-A 2-INPUT AND GATE 1.45X1.0 6-LEAD MICROPAK -40/+85 °C Table 7: EVK-M8U component list UBX-15023994 - R06 Board layout Page 22 of 29 C1-Public...
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Page 23: Schematic
EVK-M8U User Guide Schematic Figure 13: Schematic EVK-M8U: DNI=TRUE in the schematic means: Component not installed UBX-15023994 - R06 Schematic Page 23 of 29 C1-Public... -
Page 24: Battery Replacement
EVK-M8U User Guide 10 Battery replacement To replace the battery (indicated as component 5 in Figure 14), open the unit (unscrew the four screws on the front panel). Figure 14: EVK-M8U battery location UBX-15023994 - R06 Battery replacement Page 24 of 29... -
Page 25: Troubleshooting
EVK-M8U User Guide 11 Troubleshooting My application (e.g. u-center) does not receive anything Make sure that the USB cable is properly connected to the evaluation unit and the PC and USB drivers are installed correctly. By default, the evaluation unit outputs NMEA protocol on Serial Port 1 at 9600 Bd and on the USB. - Page 26 (e.g. disabling the main communication port). The EVK-M8U does not work properly when connected with a GNSS simulator When using an EVK together with a GNSS simulator, pay attention to correct handling of the EVK. A GNSS receiver is designed for real-life use, i.e.
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Page 27: Common Evaluation Pitfalls
EVK-M8U User Guide 12 Common evaluation pitfalls A parameter may have the same name but a different definition. GNSS receivers may have a similar size, price and power consumption, but can still have different functionalities (e.g. no support for passive antennas, different temperature operating ranges). Also, the definitions of hot, warm, and cold start times may differ between suppliers. -
Page 28: Related Documents
Updated the firmware version to UDR 1.31 Added section 4.2.2.1 about IMU alignment configuration 06-Aug-2020 njaf Update Table 4: Connector pin descriptions for the EVK-M8U (pins numbered from right to left on the front panel) for time pulse output. UBX-15023994 - R06 Related documents... -
Page 29: Ubx-15023994 - R06
EVK-M8U User Guide Contact For complete contact information, visit us at www.u-blox.com. u-blox Offices North, Central and South America Headquarters Asia, Australia, Pacific Europe, Middle East, Africa u-blox America, Inc. u-blox Singapore Pte. Ltd. u-blox AG Phone: +1 703 483 3180...