For all the Xilinx base design, define three global clock nets, which
are saved in the following three global variable: $sys_cpu_clk, $sys_dma_clk
and $sys_iodelay_clk.
These clock nets are connected to different clock sources depending of
the FPGA architecture used on the carrier. In general the following
frequencies are used:
- sys_cpu_clk - 100MHz
- sys_dma_clk - 200MHz or 250Mhz
- sys_iodelay_clk - 200MHz or 500Mhz
Add a clock crossing bridge for the interfaces that runs on a different
clock than the emif_user_clk.
This way we can simplify the main interconnect, and prevent occasional
timing violations.
Create the dacfifo/adcfifo infrastructure with procedures.
This will allow moving the parameters of the dac/adcfifo inside
the block design so it can be calculated based on other parameters.
- remove interrupts from system_top
- for all suported carriers:
- remove all interrupt bd pins
- connect to GND all initial unconnected interrupt pins
- update ad_cpu_interrupt procedure to disconnect a interrupt from GND
before connectiong it to another pin.
Set the properties to mirror the hardware configuration so
the Vivado tools can provide warnings if there are any conflicts
between configuration pin settings, such as an IOSTANDARD
on a multi-function configuration pin that conflicts with the
configuration voltage.
see:
https://www.xilinx.com/support/documentation/user_guides/ug570-ultrascale-configuration.pdf
The following base constraints were updated:
- kcu105
- kc705
- vc707
- ac701
+ Build both the read and write logic around an FSM
+ Consistent naming of registers and wires
+ Add support for burst lenghts higher than one, current burst lenght
is 64
+ Fix all the bugs, and make it work (first bring up with
adrv9371x/a10soc)
The DDR memory reference clock on the A10SoC development board is
differential. Currently the EMIF core it is configured for single-ended
configuration, which causes it to generate incorrect IOSTANDARD
constraints. Those incorrect constraints get overwritten again in
system_assign.tcl, so things are working, but this generates a warning when
building the design
Configure the EMIF core correctly and remove the manual constraint overwrite since
they are no longer necessary.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
There is no guarantee that the external reset de-assertion is synchronous
to the sys_clk, yet the clock bridge marks the reset de-assertion as
synchronized to the clock. This can cause recovery or removal timing
violations for the registers affected by this reset signal and potentially
bring the system into an invalid state after the reset is de-asserted.
Mark the reset as not synchronized to the clock signal, this will make sure
that Qsys inserts the proper reset synchronizers where required.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
While things seem to work fine with only specifying the the IO standard for
the positive side of differential signals Quartus will issue a warning
about incomplete constraints if the IO standard is not specified for the
the neagtive side as well. To avoid these warnings add the missing
constraints.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Fix a copy and paste error and specify the IO_STANDARD for all gpio_bd_i
rather than twice for half of them.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Both the sys_hps.f2sdram_clock and the sys_dma_clk.clk signal are in the
same clock domain. They are both driven by the same clock. And even though
qsys is capable of detecting this it seems qsys interconnect is not able to
infer this and inserts a extra clock domain crossing bridge between the DMA
and the HPS AXI system memory interface.
To avoid this connect the sys_dma_clk.clk to the sys_hps.f2sdram_clock so
that all components are driven by the same qsys clock signal.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Istvan Csomortani
Laszlo Nagy
AndreiGrozav
Adrian Costina
Lars-Peter Clausen
Rejeesh Kutty
STEVE KRAVATSKY
Nick Pillitteri