This control signal can be overwritten by the up_axis_xlast/up_axis_xlast_en bits, in order to create a single stream, which is contains multiple streams.
This can be use to fill up the DACFIFO module.
The constraints processing order changed to "late" instead of "early", in order for all the clocks in the system to be already created when the IP constraints are applied
While the reset for the memory mapped AXI master is synchronous to some
clock it is not necessarily synchronous to the clock used for that
interface. So always generate a local reset signal to avoid problems that
could result from this.
While we are at it also update the code to only generate a local reset if
the interface is asynchronous to the register map, otherwise use the
register map reset.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Ignore the timing path from the current DMA address to the register map,
this is just a debug signal at the moment.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
If the internal FIFO is larger than one block ram there will be multiple
BRAMs called ram_reg[0], ram_reg[1]. Modify the BRAM constraint rule so that
it matches these as well.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Set the ASYNC_REG property on the bit synchronizer CDC control regs. This
hint to Vivado that the registers are used for CDC purposes.
Also use -datapath_only for the set_max_delay constraints on the CDC data
path to remove the hold time requirement.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Currently the axi_hdmi_tx core constraints marks all its clocks asynchronous
to all other clocks in the system. This is a bit unfortunate as these
constraints are not restricted to the axi_hdmi_tx, but affect all cores in
the system, some of which might actually have timing constraints on CDC
paths.
The proper way to fix this is to add constraints for the axi_hdmi_tx core
CDC paths. For now only mark the interface clock asynchronous to the HDMI
clock, as this is easy to do and an improvement over the current situation,
as other cores are no longer affected.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
The src_response_fifo has been removed from the design, but we still need to
assert the ready and empty control signals for things to work properly.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Istvan Csomortani
Adrian Costina
Rejeesh Kutty
Lars-Peter Clausen