Software for RPi compatible shield for TDC-GPX2 chip

The TDC-GPX2 is a time-to-digital converter from ScioSense with up to 10ps timing accuracy. This software uses the linux kernel for GPIO and SPI-Bus to readout the GPX2 and calculate time intervals between signals. There is also the possibility of reading out the TDC using a FPGA which will then give much faster readout.

TDC-GPX2_Software

Files for building readout software for the TDC-GPX2 from ScioSense.

Folder	Description
source/gpx2-raspi-readout-program	Contains a readout loop, buffer and calculations to measure time intervals between two signals with good accuracy.
source/spi	Folder containing gpx2 source files for making the tdc board library containing all options and an high level access for readout.
scripts	python script makes a histogram of the output. requires matplotlib
data	empty folder for output

Readout via SPI:

Required:

• linux operating system (preferrably raspberry pi OS)
• up-to-date c++ compiler (C++17 compatible), tested with clang 11 and newer

How to build:

• requires cmake
• builds the gpx2 library and optionally the readout program

cd source
mkdir build
cd build
cmake ..
cmake --build .

to run the code:

/// outputs to stdout
./bin/readout 

///redirect to file
./bin/readout > ../data/test_out.data