How to Change single to/from double buffer for DAQ memories
The current fastcontrol block in ZPD firmware has a potential problem
when buffer bull + read_event + l1a happens within 2.2 micro second.
In order to avoid the DAQ data corruption due to this, a double buffering
skim for DAQ memories was implemented. The default version in IR2 has the
single buffer DAQ memory and if this causes the DAQ data corruption at
the high rate, one has to switch to the double buffering mode and it
requires rebuilding the firmware.
Launch FPGA Advantage design browser, click on decisionmodule to expand
the tree. If you click on the daq_mem under the decisionmodule, you will
see something similar to the below:
As you can see above, the single buffer is selected as a "default view"
(The default view indicator is the cyan triangle in front of the single.bd
). Move the mouse to the double.bd, right click to expand a
menu, and select properties(see below picture). After you select properties,
you can choose
default view radio button, and press ok to have it in effect.
One should repeat this for the sergio as well. For sergio, it is again
teh daq_mem tree to be expanded. See below:
Once you are done, recompile and redo the synthesis to eventually build
the new firmware.
|
