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>
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>
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>
Lars-Peter Clausen
Adrian Costina
Rejeesh Kutty