Bascom Hunter’s Digital Intermediate Frequency Interoperability (DIFI) v1.2 IP Core is a fast-deployable solution to incorporate DIFI support into your system. DIFI is the emerging IEEEISTO Std 4900-2021 standard for transferring RF data, such as digitized ADC and DAC samples, between system components.

DIFI uses a packet structure that simplifies the interoperability and communication of digital RF components from different vendors. Bascom Hunter is a contributing member to the DIFI consortium and has directly participated in feature updates such as the addition of flow control mechanisms.

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Adapted From: IEEE-ISTO Std 4900-2021: Digital IF Interoperability Standard, Version 1.2.0, Aug 23, 2023

Key Features

  • Supports DIFI packetization/encapsulation
  • Multi-stream implementations for high-rate data using multiple DIFI/ UDP/IP stacks
  • Compatible with all AMD/Xilinx FPGA/SoC families that support AXI4 streaming interfaces
  • Multi-stream implementations for low-rate data using a single DIFI/UDP/IP stack
  • Standard AXI4 interfaces: AXI4-Stream for data interfaces and direct connect interfaces for control/status

Delivery Options

The core is available in two delivery configurations:

  • Encrypted Net-list: All source code is encrypted except for a reference testbench
  • Open Source: All source code is unencrypted, viewable and changeable

Included with Purchase

  • IP Core code package including unencrypted testbench
  • One year warranty: Bascom Hunter will fix functional flaws in the core for 1 year after date of purchase at no cost. Support that is not related to a functional flaw or all support beyond 1 year after date of purchase can be provided at an hourly consulting rate.

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IMPLEMENTATION DETAILS

Packetizer

  • Fixed I/Q sample size of 16-bits each
  • Standard Flow Signal Context Packets with Info Class Code of 0x3 and Packet Class Code of 0x1
  • Version Flow Signal Context Packets with Info Class Code of 0x1 and Packet Class Code of 0x4
  • Standard Flow Signal Data Packets with Info Class Code of 0x3 and Packet Class Code of 0x0
  • Fixed length Signal Data Packet of 1,498 bytes

Flow Control Generator and Receiver

  • Real Time TSF Timing Flow Control Command Packets with configurable Info Class Code and Packet Class Code