HoverGames Interposer Board (HGI)

The HoverGames Interposer Board has a large amount of connectors and I/O for you to connect your devices, sensors, switches, LEDs, and more. This section will give you an overview of the connector pinouts on the HGI. The picture below has a few silkscreen labels for pinouts on each connector, but some connectors have multiplexers to make them more flexible.

UART2

UART2 is used for the serial monitor, and should not be used for anything other than the serial monitor. It should not be altered.

UART3

UART3 will mainly be used for serial communication to the FMU in HoverGames, but it can be used as an SPI port if you're not using it for the drone.

UART4/I2C/GPIO

The bottom 9 pin JST-GH connector in the image of the HGI is used for UART4/I2C/GPIO.

The UART4 pins do not have flow control on this connector. There is no multiplexing on this connector as well. The pinout is below.

Linux GPIO Pin IDs

SPI/GPIO

The SPI/GPIO port has a full pinout for SPI as well as 3 GPIO pins. The SPI pins can be muxed to a full UART 4 port with flow control. The pinout is below.

Linux GPIO Pin IDs

GPIO Headers

The GPIO header pads on the HGI are not labeled correctly with the silkscreen. The layout is shown below with TP labels and schematics.

If you would like to take a look at the schematics of each board in the NavQ, you can download the .zip file at the bottom of this page. The table below gives detail for each folder inside the .zip file.

NavQ SOM

The SOM includes the processor, RAM, memory, and WiFi chip for the NavQ.

Summary

The NavQ SOM (System on Module) contains the brains of the NavQ. On this board, we have our i.MX 8M Mini processor, 2GB of LPDDR4 memory, 16GB of eMMC flash storage, and a QCA9377 WiFi AC + BT 5.0 chip. There are connectors on the bottom of this board that allow for modularity.

Components

Dimensions

The NavQ's dimensions are 3" W x 2" L x 7/16" H.

Media Board

Summary

The Media Board consists of an SD Card slot, MIPI connectors for a camera serial interface as well as a display serial interface, and a PCIe connector.

Components

Image of Google Coral Camera + MIPI to HDMI Adapter:

Google Coral Camera Dimensions

The Google Coral Camera dimensions are 25mm x 25mm, as shown in the tech specs here:

Hovergames Interposer Board (HGI)

Summary

The HoverGames Interposer Board (HGI) is the final board in the stack and has a multitude of I/O for your needs in HoverGames. Connect sensors, switches, and LEDs to the NavQ using the HGI to drastically improve your drone system, and even control your drone using NavQ using offboard control with MAVROS.

Components