Putting directory with OHWR as remote repo ( /projects/HEP_Instrumentation/cad/designs/fmc-mtlu/fmc-mtlu/firmware/AIDA_tlu )
into sync with
directory with Github/DavidCussans ( /users/phdgc/tlu-tmp-2018-5-8/work/build/src/firmware_AIDA )

( in with MiniTLU firmware )

Used instructions at https://bneijt.nl/blog/post/merge-a-subdirectory-of-another-repository-with-git/ to merge in Paolo's firmware with FMC-TLU Git repository

git clone git@github.com:DavidCussans/firmware_AIDA.git
git clone ssh://git@ohwr.org/fmc-projects/fmc-mtlu.git
cd fmc-mtlu/
git remote add firmware_AIDA ../firmware_AIDA
git fetch firmware_AIDA
git merge -s ours --no-commit --allow-unrelated-histories firmware_AIDA/master
( N.B. Had to add allow-unrelated-histories flag ... )
git read-tree --prefix=AIDA_tlu -u firmware_AIDA/master
git commit

The triggers would have been permanently disabled if the shutter was disabled.

After fix triggers are no longer disabled if the shutter is disabled.

(T0 pulse is generated when run_active goes high.)

Partially catching up ( manually ) with Paolo's code .

* Edited build_tlu_firmware.sh - no need to execute script to change top level entity

* enclustra_ax3_pm3_a35.dep - Don't include IPBus top level dep file. This allows the top level entity to be in local directory

* Edited T0_Shutter_Iface_rtl.vhd to enable shutter when T0 is pulsed. Modified TLU_v1e.py and startTLU_v1e.py accordingly
( N.B. **** There is a bug in the code that enables/disables shutter when pulseT0 is written. )

* Added ipbus_syncreg_v and dependencies to projects/TLU_v1e/firmware/cfg/tlu_1e.dep

* Edited top level ( top_enclustra_tlu_v1e.vhd ) to add extra shutter_veto port in T0_Shutter_Iface_rtl

* Moved counterWithResetPreload_rtl.vhd to counterWithResetPreset_rtl.vhd
* Changed dep file to include new files.
* Minor change to dualSERDES_1to4_rtl.vhd to hopefully remove a warning message

* Adding SyncGeneratorIPBus_rtl.vhd , which is a wrapper to SyncGenerator_rtl.vhd , giving an IPBus interface
* Modifications to SyncGenerator_rtl.vhd to tidy up code

* Created SyncGenerator_rtl.vhd , which generates trigger veto and shutter signals. (needs to be wrapped in IPBus interface)
* Created counter with preload to top bit as well as reset

It is necessary to set up Vivado and Cactus environment before
running the script.