Add additional IDELAY block before the ISERDES. Delet the IDDR blocks. Be aware, the ISERDES block are running in DDR mode. If the interface is SDR the maximum parallel data width is 4.
Clear the pipeline when no transfers are active to make sure that we do not
get residual data on the first sample for the next transfer.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
We only do have 4 channels in this design. Reducing the number of supported
channels for the dac_util_unpack core to 4 from 8 lowers the DMA alignment
requirement from 128bit to 64bit. We need this since applications only
expect a DMA alignment requirement of 64bit.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
We have enough bridge interconnect to give each DMA its own, so use them.
This makes sure that they do not interfere with each others transfers to
much. The SDRAM controller side of the FPGA2SDRAM bridges FIFO runs at a
much faster frequency then what we are able to use in the fabric. So its
better to do the arbitration on that side of the bus to make sure that we
can utilize the buses in the FPGA fabric to the maximum for each DMA core.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Always using 128bit for the input word unnecessarily increases the DMA
alignment requirements. This breaks existing software which assumes that the
DMA alignment requirement is 64bit.
So make it configurable whether we want 8 or 4 channels and while we are at
it also make the channel width configurable.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
By setting the AXI controler interface type from axi4 to axi4lite we can use
the normal toplevel file with only a simple modification to add the awprot
and arprot signals.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
We can remove the Altera toplevel wrapper if we switch the axi4 control bus
to axi4lite and add the few missing signals that are required by the Altera
interconnect to both the control and the data buses.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
This is unused and unneeded. The AXI interconnect will make sure that a
peripheral only gets requests that are meant for it, there is no need to
check the address in the peripheral itself.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Rejeesh Kutty
Adrian Costina
Istvan Csomortani
Lars-Peter Clausen
Michael Hennerich