Update 'README.md'

README.md

@@ -7,8 +7,10 @@ Files for building readout software for the TDC-GPX2 from ScioSense.
 | ------ | ----------- |
 | 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.
-| source/gpx2-fpga | tba |
+| scripts | python script makes a histogram of the output. requires matplotlib|
+| data | empty folder for output|
 <br>
+
 <strong>Readout via SPI:</strong>
 
 Required:
@@ -16,9 +18,22 @@ Required:
 - up-to-date c++ compiler (C++17 compatible), tested with clang 11 and newer
 
 How to build:
-- This software packages is build with cmake
+- requires cmake
 - builds the gpx2 library and optionally the readout program
 
-<br>
-<strong>Readout via LVDS using an FPGA:</strong><br>
-coming soon
+```sh
+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
+```