Make sure that the reference PN sequence is only incremented every two clock
cycles to make sure that it matches the rate of the ADC PN sequence.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
There will rarely be concurrent access to the peripheral control bus
interconnect, so there is no need to optimize for performace. Setting the
interconnect strategy to minimize area can reduce the resource usage by
~90%.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
The AXI DMAC controller nativly supports AXI3, there is no need to insert a interconnect to do protocol conversion.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Due to the delay between the dac_valid and the fifo_valid signal we need to
have two counters. One counter which counts the number of incoming
dac_valid signals and generates the dma_rd signal and one counter for the
offset which gets set to 0 when fifo_valid is set.
This fixes issues with the unpack order when only one channel is active.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
This silences warnings from the tools about having no clock assigned to the bus.
Also fix the name of the TVALID signal.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
The DMA controller is able to send AXI3 compatible requests, no need to add
a interconnect for protocol conversion in between the DMA controller and the
HP port.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
There are only 4 DAC channels in the fmcomms2 design, so set the number of
channels of the dac_unpack core to 4. This slightly reduces resource usage
as well as reducing the DMA alignment requirement from 128bit to 64bit. The
later value is what existing applications expect the alignement requirement
to be.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
The dummy a{r,w}len fields should have the same width as the real a{w,r}len
fields in order to not break auto AXI bus version detection.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Hide unused signals based on the number of selected channels. This silences
a few warnings from the tools about unconnected pins.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Hide unused signals based on the number of selected channels. This silences
a few warnings from the tools about unconnected pins.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
When using a localparam for the width of a input/output signal the tools
won't be able to infer the size of the signal. This results in the signal
always being only 1 bit wide which causes the design to not work.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
This avoids some critical warnings from Vivado that the DMA bus does not has any associated clocks.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Add a helper function that can be used to register a clock and a reset interface for the clock and reset signals of a bus.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
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>
Rejeesh Kutty
Paul Cercueil
Michael Hennerich
Lars-Peter Clausen
Istvan Csomortani
Adrian Costina