42a9da0659
We really only want to apply the CDC constraints if the clocks are actually
asynchronous. Unfortunately we can't use if ... inside a xdc script. But we
can use expr which has support for a ? b : c if-like expression. We can use
that to create helper variables that contains valid clock when the clock
domains are asynchronous or {} if they are not. Passing {} as
set_false_path/set_max_delay as either the source or destination will cause
it to abort and no constraints will be added.
Also add -quiet parameters to avoid generating warning if the constraints
could not be added.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
|
||
|---|---|---|
| library | ||
| projects | ||
| .gitignore | ||
| LICENSE | ||
| Makefile | ||
| README.md | ||
README.md
hdl
Analog Devices HDL libraries and projects
Tools version:
- Vivado 2014.4.1
- Quartus 14.0
First time users, it is highly recommended to go through our HDL user guide at the following url:
http://wiki.analog.com/resources/fpga/docs/hdl
For support please visit our FPGA Reference Designs Support Community on EngineerZone: