Thermal Image of a person holding a hot coffee captured by Lepton 3.5 IR sensor
To transfer the sensor data with a minimum of software or hardware, FLIR has developed the VoSPI protocol, an SPI based Video Interface. BitSim has developed an FPGA IP, Bit-VoSPI Rx, to receive the VoSPI data.
This IP implements custom logic to receive the data through SPI interface, extracts the video data and sends the data out through AXI4-Stream interface. It is configurable for different resolutions and is easy to instantiate in FPGA designs.
In combination with another BitSim IP, the Bit-MIPI CSI-2 Tx (MIPI CSI-2 transmitter), the received IR-data can be streamed to popular SoCs like i.MX8, Jetson/Xavier, Snapdragon and others since they demand to use their MIPI CSI-2 receiver interface when using the embedded ISP engine.
An V4L SW-driver for the i.MX8 is included for configuring its MIPI CSI-2 receiver.
The VoSPI IP have been tested on Xilinx and Microchip FPGA platforms and the i.MX8 SoC from NXP on a Variscite board.
To read more about BitSim IPs: https://bitsimnow.com/ip-block/
To read more about
the Linux driver SW for the VoSPI IP: https://bitsimnow.com/fpga/ir-sensor-linux-v4l-sw-driver-vospi/
To read more about MIPI: https://mipi.org/specifications/camera-and-imaging
To read more about VoSPI: https://media.digikey.com/pdf/Data%20Sheets/FLIR%20PDFs/VoSPI_Implementation_Spec_Rev007_Sep9_2013.pdf