This project includes the following components :

**/Core** : The main library controlling the SDR from a computer
- RadioHandler : The API exposed by the Core module. Suitable to interact directly with the SDR from C++ programs
**/sddc-cli** : A command line tool to use your SDR easily
**/ExtIO_sddc** : The compatibility layer for ExtIO.dll and HDSDR
**/SoapySDDC** : The compatibility layer for SoapySDR
**/libsddc** : A wrapper for C-based programs to interact directly with the SDR
**/SDDC_FX3** : The firmware source code of the BBRF103 and others

Differences with ExtIO_SDDC

This project could not exist without the work of Oscar Steila (ik1xpv) and others towards the development of the original driver (ExtIO_SDDC).

This fork brings the following improvements on top of ExtIO_SDDC :

Make Linux support the priority
Extend the features offered by libsddc and SoapySDDC
Provide a standalone tool (sddc-cli) to get samples from your SDR
Use any ADC sampling rate (ExtIO_SDDC only allows preconfigured choices)
Use libusb for all operating systems (no Cypress driver required)
Documentation (WIP) of the internal APIs
Resolve a handful of crashs
Improve memory safety
A deep refactor to better isolate each component and make the codebase more consistent

Those changes comes with downsides :

Windows support is considered unstable (compilation works, but I've not tested with real hardware)
The performance can be worse as a result of the refactor
This driver cannot be used alongside ExtIO_SDDC on Windows computers. This is because ExtIO_SDDC uses the Cypress driver, while SDDC_Driver embeds its own driver. This issue is not present on other OSes.

Getting started

You can download the latest binaries from the releases: https://github.com/renardspark/SDDC_Driver/releases.

If you want to give a try to the most recent build, the binaries are available on Github Actions.

Warning : Before using your SDR on Windows, drivers install is required to make it work. The procedure is explained in Windows_driver_setup.md

The ExtIO DLL is available for Windows (32 and 64 bit). It can be used with compatible SDRs such as HDSDR or SDR#.

You need to download 32bit version of fftw and libusb, and copy them to the same folder as ExtIO DLL.

SoapySDR support is available on Linux / MacOS. It can be used with SDRs such as Gqrx or SDRangel.

Install Visual Studio 2026 with Visual C++ support. You can use the free community version, which can be downloaded from: https://visualstudio.microsoft.com/downloads/

Install CMake 3.19+ and development packages:
> sudo apt install cmake libfftw3-dev libusb-1.0-0-dev
Run the following commands in the root folder of the cloned repo:
> mkdir build

> cmake -S . -B build/

> cmake --build build/

or

> cmake --build build/ --config Release

or

> cmake --build build/ --config RelWithDebInfo

download latest Cypress EZ-USB FX3 SDK from here: https://www.cypress.com/documentation/software-and-drivers/ez-usb-fx3-software-development-kit
follow the installation instructions in the PDF document 'Getting Started with FX3 SDK'; on Windows the default installation path will be 'C:\Program Files (x86)\Cypress\EZ-USB FX3 SDK\1.3' (see pages 17-18) - on Linux the installation path could be something like '/opt/Cypress/cyfx3sdk'
add the following environment variables:
export FX3FWROOT=<installation path>

export ARMGCC_INSTALL_PATH=<ARM GCC installation path>

export ARMGCC_VERSION=4.8.1

(on Linux you may want to add those variables to your '.bash_profile' or '.profile')
all the previous steps need to be done only once (or when you want to upgrade the version of the Cypress EZ-USB FX3 SDK)
to compile the firmware run:
cd SDDC_FX3

make