Currently the DAC FIFO size for the ZC706 DAQ2 project is 16kB. This is
quite a limiting size for practical applications. Increase the size to 1MB
to allow loading larger waveforms.
In this configuration the DAC FIFO will use half of the available BRAM
cells in the FPGA. This still leaves quite a few BRAMs available for
user application logic added to the design. If a user design should run out
of BRAMs nevertheless they can reduce the FIFO size, if not required by the
application, to free up some cells.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
If a parameter value is defined as a string binary (e.g. "001001000000"),
it can confuse the tool, and the value may be used as a decimal number.
To prevent this issue and to improve readability converting all the binary
constants into hexadecimal.
Configure the interconnect and offload modules inorder to activate
its interfaces. In the past, these interfaces did not have any
parameter dependencies, so this configuration were not required.
In case of high precision devices with just a simple SPI interface
for control and data, the effective data rate can be significatly
lower than the SPI clock, and more importantly there isn't any relation
between the two clock domain.
The rate is defined by a SOT (start of transfer) generator, which
initiates a SPI transfer. Taking the fact that the generator runs
on system clock (100 MHz), and the device can require smaller rate (in kHz domain),
the 7 bit dac_datarate register is just too small.
Therefor increasing to 16 bit.
This core can be used in conjunction with the SPI_ENGINE, will work
as an offload module, forwarding a data stream to the SPI excecution,
received from a DMA.
It seems that there are some dependencies between the fir compiler
cores parameters. With the old order of the parameter settings,
the tool throws the following warning:
CRITICAL WARNING: [BD 41-237] Bus Interface property TDATA_NUM_BYTES
does not match between /processing/sequencer/i_q_filtered(4)
and /processing/lpf/M_AXIS_DATA(5)
Lars-Peter Clausen
Istvan Csomortani
Rejeesh Kutty
Dragos Bogdan
Adrian Costina