Save the valid AXI beats number of the last AXI transaction, and the valid
DMA beats number of the last AXI beat, so the read back logic can use this
data and prevent to feel up the CDC memory with invalid samples. Also in
this way the end of the read back cycle get a more robust control: no more
duplicated samples at the end of the buffer.
Only enable bitstream compression only if both the
ADI_NO_BITSTREAM_COMPRESSION environment and TCL variable are not set.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Enabling bitstream compression reduces the size of the generated bitstream.
This means on one hand it will consume less storage, which is especially
useful for the BOOT partition of the ADI images where we store BOOT.BIN
files for all supported platforms.
On the other hand a smaller bitstream is faster to load from the storage
medium and it is also faster to program to the FPGA. So it reduces the
overall boot time as well.
The only downside of bitstream compression is that the bitstream size is no
longer constant, but depends on the actual design and resource utilization.
This will not work with bootloaders that expect a fixed size.
When building a bitstream using the tcl scripts bitstream compression can
be disabled by setting the ADI_NO_BITSTREAM_COMPRESSION environment
variable.
Initial tests show a reduction of a round 50% in size for most ADI
projects.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
The bypass logic is located between the AXI read controller and the
DAC CDC fifo. When the bypass is enabled the DMAC destination interface
must be clocked with the PL_DDR controller's ui_clk. This way it can easily
switch between the AXI read's stream and DMAC's stream interface.
Rejeesh Kutty
Istvan Csomortani
Shrutika Redkar
Lars-Peter Clausen
AndreiGrozav
Adrian Costina