ST EVB-LIV4F Evaluation Board User Manual

ST EVB-LIV4F Evaluation Board User Manual

Introduction

The EVB-LIV4F evaluation board is a complete standalone evaluation platform for Teseo-LIV4F tiny dual band GNSS module. Teseo-LIV4F module is an easy to use dual-band global navigation satellite system (GNSS) standalone module, embedding Teseo IV single die standalone positioning receiver IC working simultaneously on multiple constellations (GPS/Galileo/Glonass/ BeiDou/QZSS).
The EVB-LIV4F is designed for top performance Teseo-LIV4F GNSS module.

Features

The EVB-LIV4F has the following features:

• USB power supply
• Internal backup battery placing (battery not provided)
• Push buttons to switch ON and OFF
• I 2C and Current measurement connector
• Reset button
• UART by USB connector
• PPS output LED
• Power output LED

EVB-LIV4F general presentation

The EVB-LIV4F kit is composed of several elements:

• EVB-LIV4F evaluation board;
• GNSS active antenna;
• 1 USB cable;
• EVB-LIV4F – Quick starting guide.

Interfaces

The EVB-LIV4F offers a different interface to the user:

• ON/OFF button;
• Reset button;
• µUSB use for interface with UART of EVB-LIV4F;
• Supply by USB (5 V);
• GNSS antenna input;
• LED indicators.

Power by USB
A micro USB connector (see the Figure 1) allows supplying the board identify in yellow bellow

Figure 1. Power input

ON/OFF switch

Figure 2. ON/OFF switch

When button (see the Figure 2) is lifted if user presses the ON/OFF switch the board turn ON and power LED turn on. When ON/OFF switch is lifted, VBAT is connected to GND and the board is switched OFF.

Reset
A reset button (see the Figure 3) is present on front panel of case and it resets the Teseo-LIV4F module.

Figure 3. Reset button

3.4 LED indicators

The EVB-LIV4F offers two LED Indicators as shown below:

• The PWR red LED (see the Figure 4) indicator shows whether the unit is ON (led is turn on) or OFF (led is turn off).

Figure 4. Power LED indicator

• The PPS green LED (see the Figure 5) indicator blinking every second and it indicates Teseo-LIV4F is up and running.

Figure 5. PPS LED indicator

UART by USB
The UART interface (see the Figure 6) is provided via a USB connector.

Figure 6. USB/UART connector

The UART interface is used to trace NMEA messages and for upload binary file on the system. Before using UART/USB bridge CP2104, you need to install the VCP driver. You can download it from the Silicon Labs web page.
The virtual COM port (VCP) device drivers allow the CP2104 device on EVB-LIV4F to appear to the PC’s application software as a standard COM port. Application software running on the PC accesses the CP2104 device as it would access a standard hardware COM port configured as shown in the Table 1. However, actual data transfer between the PC and the CP2104 device is performed over the USB interface as shown in the following figure.

Figure 7. UART to USB path through converter

Table 1. UART configuration

GNSS input antenna
The GNSS input (see the Figure 8) is available through a SMA female connector.

Figure 8. GNSS SMA antenna connector

The passive or active antenna can be used on EVB-LIV4F. The DC power supply for active antenna is 3V3 with current limitation in case of short circuit.

Note: Use DC blocker for passive or simulator connected to EVB-LIV4F.

2C and power connector interface
The 10-pins connector (CN302) provides I2C bus signal and power supply to evaluate current consumption as shown in the Figure 9

Figure 9. I 2C and power measure connector

Table 2. Connector pin-out description

The four pins VCC_IO (#1), GND (#2), I2C_CLK (#5), I2C_SD (#6) allow connection of an external I2C-masterdevice to the Teseo-LIV4F. Teseo-LIV4F always acts as slave on I2C-bus.

Current measurement process

To measure the current consumption of Teseo-LIV4F in the different operating mode, based on the pins placement as shown in the Figure 10, follow these steps:

1. Connect a true-rms voltmeter to:
   • Vcc (pin #9) and PM_VCC (pin #10)
   • Vbat (pin #7) and PM_VBAT (pin #8)
2. Wait 15 minutes to download all GNSS orbital data.
3. Read the voltage (and average if necessary) the current value is done by following conversion:
   • VCC → 1 mV equals 1 mA
   • VBATT → 100 mV equals 1 mA

Figure 10. Pins placement in the current measurement connector

Note: Perform the test with good signals and clear sky view to ensure that the receiver can acquire the satellite signals.

Teseo-Suite connection

Download the Teseo-Suite from STMicroelectronics web site. Install and start Teseo-Suite, and follow directions described in the following chapters.

Getting started with the Teseo-Suite
When the application starts, Teseo-Suite opens the Configuration Session panel, as shown in the Figure 11 below, to allow the user to add the EVB- LIV4F. Then enter a session name to enable the Add Device button.

Figure 11. New session panel

• If the Configuration Session panel is not opened, 2 ways either go to File menu and select New Session or click the Edit Session Configuration button shown in the Figure 12.
  Figure 12. Edit Session Configuration button
  

Add/delete device
In the Configuration Session panel, you can add/remove EVB-LIV4F devices in the work session and monitor existing ones. Pressing the button Add Device brings up the Configuration Device form, as shown in the Figure 13.

In the Configuration Device:

• Set the Hardware type with STA8090 value;
• Select the Control Port and choose the parameters of the serial connection as in the Table 1;
• On Control Port, the user can select the NMEA protocol;
• Press the OK button to create the device.

Figure 13. Configuration Device panel

When selecting the port name, the Teseo-Suite provides an enumeration of all the COM ports available even if these COM ports are already used by another application.

Note: The protocol of the device and its name cannot be changed once the OK button has been clicked. To delete a device from the session, press the corresponding delete button in the Delete device column from the Configuration Session form (see the following figure).
Figure 14. Configuration Session panel with one device added

The button Delete All removes all the devices of the current session.

Connect or disconnect Control Port
The Control Port defined when device has been added can be opened. If a port is defined, the corresponding checkbox is enabled. Selecting the checkboxes in the Connect Ctrl port column enables the corresponding connection buttons, as shown in the Figure 14 above. Click the Connect (Electrical Plug) button to open the selected ports, and a red X shows up, as shown in the Figure 15 below.

Figure 15. Port connections active

Open the NMEA output window to confirm proper NMEA output using the button shown in the Figure 16.

Figure 16. NMEA output view

On NMEA panel view the NMEA stream coming from EVB-LIV4F can be seen as shown in the Figure 17.

Figure 17. NMEA view panel

Now your EVB-LIV4F is fully working.

Board general view

Internal board view

Figure 18. Internal board view and jumper configuration

Block diagram overview

Figure 19. Block diagram

Appendix A Other information

A.1 Reference documents

Table 3. Reference documents

of Teseo GNSS family

Revision history
Table 4. Document revision history

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