README.md

@@ -25,13 +25,18 @@ cmake --build <directory-to-build-in> --clean-first -- -j8
 ```
 
 
-## Specifying number of TDC channels
-The number of scaler the frontend should be built with, can be specified with a CMake configuration flag, before adding the module as a subdirectory.
-Currently valid options are 1 or 2 sis3820 cards. I.e. the only valid values are 32 and 64:
+## Including default frontend, scaler channels
+The CMakeLists.txt creates a functions that instantiates the default frontend with a few parameters:
+
+E.g. the number of scaler channels the frontend should be built with.
+Currently 1 or 2 sis3820 cards are possible. I.e. the only valid values are 32 and 64 channels.
 
 ```CMake
-set(Scaler_channels "32" CACHE STRING "Number of Scaler channels" FORCE)
-add_subdirectory(struck_sis3820)
+# The first argument is name of executable
+# The second arguments is frontend/equipment name
+# The third argument the midas event id, 2 in case from GPS
+# The fourth argument, example from GPS, it has 64 scaler channels.
+default_scaler_frontend(scaler_sis3820_fcfe "Scaler" 2 64)
 ```
 
 ## Including in Custom Frontend