When the link is disabled the events can be ignored.
This is required by the free running event counter that can catch
invalid events during startup cased for example by an invalid link clock.
If the lane looses synchronization due invalid characters or disparity
error the lane alignment monitor checks random input which results in
irrelevant reporting of frame alignment error.
If all lanes are synchronized (CGS state machine is in DATA phase) for long
enough therefore the link is also synchronized/DATA phase reset the error
counter since the accumulated values during INIT/CHECK are irrelevant.
These errors are handled by the per-lane CGS state machine.
All errors accumulated during INIT/CHECK phase of CGS are relevant only
if the link is unable to reach the DATA phase.
The link stays in DATA phase unless software resets it,
so all errors accumulated during the DATA phase are relevant.
The previous implementation of the de-glitch only delayed the assertion
of the SYNC phase by 64 clock cycles with the DEGLITCH state but if meanwhile
one of the lanes got into a bad state cgs_ready de-asserted the state machine
continued to go SYNCHRONIZED (DATA) state.
This change extends the required number of consecutive cycles while all lanes
must stay in data phase before moving the link to SYNCHRONIZED state from 8 to 256;
This increases the reliability of link bring-up without needing extra
link restarts from software side.
Add statistics for :
- number of link enable events
- number of interrupt events (regardless of mask)
0x0B0 0x2C0 Stats Control Register
[0] - Write 1 to clear stat registers
0x0B1 0x2C4 Link Enable Stat Register
[15:0] Number of times the link was enabled from power-on or from last
stat clear
0x0B4 0x2D0 IRQ Stat Register 0
[31:16] IRQ 1 counter
[15:0] IRQ 0 counter
0x0B5 0x2D4 IRQ Stat Register 1
[31:16] IRQ 3 counter
[15:0] IRQ 2 counter
0x0B6 0x2D8 IRQ Stat Register 2
[31:16] IRQ 5 counter
[15:0] IRQ 4 counter
0x0B7 0x2DC IRQ Stat Register 3
[31:16] IRQ 7 counter
[15:0] IRQ 6 counter
When frame alignment error monitoring is enabled and error threshold is met
at least for one lane, generate an interrupt so software can reset the link and
do further bring-up steps.
Add support for RX frame alignment character checking when scrambling is enabled and
for link reset on misalignment.
Add support for xcelium simulator to jesd204/tb
Having the same name for dac and adc TPLs creates conflict in the
address segment naming having random names associated to the segments.
This causes difficulties during scripting of the project in test bench
mode.
The external synchronization signal should be synchronous with the
dac clock. Synchronization will be done on the rising edge of the signal.
The control bit is self clearing. Status bit shows that the synchronization
is armed but the synchronization signal has not yet been received
Added EXT_SYNC parameter to be able to keep the dac_sync original
behavior
The external synchronization signal should be synchronous with the
adc clock. Synchronization will be done on the rising edge of the signal.
The control bit is self clearing. Status bit shows that the synchronization
is armed but the synchronization signal has not yet been received. While
the synchronization mechanism is armed, the adc_rst output signal is set
The current format should allow for the SYSREF signal to be used as
synchronous capture start, but will need to be disabled before the
synchronization mechanism is armed
In order to help timing closure on multi SLR FPGAs add a pipeline stage
between the link layer and physical layer. This will add a fixed amount
of delay to the overall latency.
This patch will fix the following warning:
[Synth 8-689] width (16) of port connection 'up_axi_awaddr'
does not match port width (12) of module 'up_axi'
The tb_base.v verilog files does not contain a full module definition,
just some plain test code. In general the files is sourced inside the
test bench main module. As is, defining a timescale in these files will
generate an error, because timescale directive can not be inside a
module.
Delete all the timescale directive from these files.
When only one converter is used there is no need for concatenation and
slicer cores. In that case the TPL will connect to port 0 from the
application layer.
Common basic steps:
- Include/create infrastructure:
* Intel:
- require quartus::device package
- set_module_property VALIDATION_CALLBACK info_param_validate
* Xilinx
- add bd.tcl, containing init{} procedure. The init procedure will be
called when the IP will be instantiated into the block design.
- add to the xilinx_blockdiagram file group the bd.tcl and common_bd.tcl
- create GUI files
- add parameters in *_ip.tcl and *_hw.tcl (adi_add_auto_fpga_spec_params)
- add/propagate the info parameters through the IP verilog files
axi_clkgen
util_adxcvr
ad_ip_jesd204_tpl_adc
ad_ip_jesd204_tpl_dac
axi_ad5766
axi_ad6676
axi_ad9122
axi_ad9144
axi_ad9152
axi_ad9162
axi_ad9250
axi_ad9265
axi_ad9680
axi_ad9361
axi_ad9371
axi_adrv9009
axi_ad9739a
axi_ad9434
axi_ad9467
axi_ad9684
axi_ad9963
axi_ad9625
axi_ad9671
axi_hdmi_tx
axi_fmcadc5_sync
Add support for 8 bit resolution for the transport layer.
Fix parameter BITS_PER_SAMPLES propagation to all the internal modules, in
several cases this variable was hard coded to 16.
Registers from this component can fit in the 2k address range.
Since Vivado's minimal address range is 4k, use that instead.
This will allow placing the independent TPLs to base addresses
that mach the addresses from the monolithic blocks ensuring no software
intervention.
For consistent simulation behavior it is recommended to annotate all source
files with a timescale. Add it to those where it is currently missing.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Replace the open-coded instances of a perfect shuffle in the DAC framer with
the new helper module.
Using the helper module gives well defined semantics and hopefully makes
the code easier to understand.
There are no changes in behavior.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
The constraint for the synchronizer that synchronizes the sync_status
signal of the link only works correctly for the first link. For other links
no timing exception is applied, which leads to timing failures.
Fix this by using a wildcard constraint for the synchronizer reg number.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Most converters refer to their different operating modes as a "Mode X"
(where X is a number) in their datasheet. Each mode has a specific framer
configuration associated with it.
Provide a set of Platform Designer (previously known as Qsys) preset files
for each mode. This allows to quickly select a specific operating mode
without having to lookup the corresponding framer configuration from the
datasheet.
A preset can be selected either in the Platform Designer GUI or from a tcl
script using the apply_preset command. E.g.
add_instance ad9172_transport ad_ip_jesd204_tpl_dac
apply_preset ad9172_transport "AD9172 Mode 10"
The preset files are generated using the scripts/generate_presets.py
script and the scripts/modes.txt file.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
A converter typically only supports a specific subset of framer
configurations.
Add a configuration parameter to select a specific converter part number.
Based on the selected part a mode validation will be performed and if the
selected framer configuration is not supported by the part an error will be
generated.
This helps to catch invalid configurations early on rather than having to
first build the bitstream and then notice that it does not work.
When using "Generic" for the part configuration parameter no validation
will be done and any framer configuration can be selected.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
The exact layout of the input data into the DAC transport layer core
depends on the framer configuration. The number of input channels is
always equal to the NUM_CHANNELS parameter, but the number of samples per
channel per beat depends on the ratio of number of lanes, number of
channels and bits per sample.
It is possible to compute this manually, but this might require in-depth
knowledge about how the JESD204 framer works. Add read-only parameters that
display the number of samples per channel per beat as well as the total
width of the channel data signal.
This information can also be queried in QSys scripts and used to
automatically configure the input pipeline. E.g. like the upack core:
set NUM_OF_CHANNELS [get_instance_parameter_value jesd204_transport NUM_CHANNELS]
set CHANNEL_DATA_WIDTH [get_instance_parameter_value jesd204_transport CHANNEL_DATA_WIDTH]
add_instance util_dac_upack util_upack
set_instance_parameter_values util_dac_upack [list \
CHANNEL_DATA_WIDTH $CHANNEL_DATA_WIDTH \
NUM_OF_CHANNELS $NUM_OF_CHANNELS \
]
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
For a specific set of L, M and NP framer configuration parameters there is
an infinite set of possible values for the S and F configuration parameters
as long as S and F are integer and the following relationship is met
S / F = (L * 8) / (M * NP)
Typically the preferred framer configuration is the one with the lowest
latency. The lowest latency is achieved when S is minimal.
Automatically compute and select this value for S instead of having the
user to manually provide a value.
Since some converters allow modes where S is not minimal provide a manual
overwrite to specify S manually in case somebody wants to use such a mode.
For completeness also add a read-only OCTETS_PER_FRAME (F) parameter that
can be used to verify and check which value for F was chosen.
There is no manual overwrite for F since if L, M, NP and S are set to a
fixed value there is only a single possible value for F, which is computed
automatically.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
The ad_ip_jesd204_tpl_dac currently only supports JESD204 modes that have
both N and N' set to 16.
Newer DACs like the AD9172 support modes where N and N' are not equal to
16. Add support for these modes.
The width of the internal channel data path is set to N, only processing as
many bits as necessary. At the framer the data is up-sized to N' bits with
tail bits inserted as necessary. This data is then passed to the link
layer.
The width at the DMA interface is kept at 16 bits per sample regardless of
the configuration of either N or N'. This is done to keep the interface
consistent with the existing infrastructure it will connect to like upack
and DMA. The data is expected to the LSB aligned, the unused MSBs will be
ignored.
Same is true for the test-pattern data registers. These register keep their
existing 16-bit layout, but unused MSBs will be ignored by the core.
The PN generators are modified to create only N bits of data per sample.
Note that while the core can now support modes with N' = 12 there is still
the restriction that requires the number of frames per beat to be an even
number. Which means that not all modes with N' = 12 can be supported yet.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
The current framer implementation is limited in that it only supports N'=16
and either S=1 or F=1.
Rework the framer implementation to be more flexible and support more
framer setting combinations.
The new framer implementation performs the mapping in two steps. First it
groups samples into frames, as there might be more than one frame per beat.
In the second step the frames are distributed onto the lanes.
Note that this still results in a single input bit being mapped onto a
single output bit and no combinatorial logic is involved. The two step
implementation just makes it (hopefully) easier to follow.
The only restriction that remains is that number of frames per beat must be
integer. This means that F must be either 1, 2 or 4. Supporting partial
frames would result in partial sample sets being consumed at the input,
which is not supported by input pipeline.
The new framer has provisions for handling values for the number of octets
per beat other than 4, but this is not exposed as a configuration option
yet since the link layer can only handle 4 octets per beat. Making the
octets per beat configurable is something for future iterations of the
core.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
The ad_ip_jesd204_tpl_dac currently is only instantiated as a submodule by
other cores like the axi_ad9144 or axi_ad9152. These cores typically only
support one specific framer configuration.
In an effort to allow more framer configurations to be used the core is
re-worked, so it can be instantiated standalone.
As part of this effort provide GUI integration for Xilinx IP Integrator
where users can instantiate and configure the core.
For this group the configuration parameters by function, provide
descriptive label and a list of allowed values for parameter validation.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
The ad_ip_jesd204_tpl_dac currently is only instantiated as a submodule by
other cores like the axi_ad9144 or axi_ad9152. These cores typically only
support one specific framer configuration.
In an effort to allow more framer configurations to be used the core is
re-worked, so it can be instantiated standalone.
As part of this effort provide GUI integration for Intel Platform Designer
(previously known as Qsys) where users can instantiate and configure the
core.
For this group the configuration parameters by function, provide
descriptive label and a list of allowed values for parameter validation.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
The framer module is purely combinational at this point and the clk signal
is unused.
This is a leftover of commit commit 5af80e79b3 ("ad_ip_jesd204_tpl_dac:
Drop extra pipeline stage from the framer").
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Add a interface definition for the link interface that combines the valid,
ready and data signals into a AXI streaming interface.
This allows to connect the interface to the JESD204 link layer peripheral
in one go without having to manually connect each signal.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Some modes produce only one sample per channel per beat, e.g. when M=2*L.
In this case the pattern output needs to alternate between the two patterns
from beat to beat.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
All channels have a copy of the same logic to generate the PN sequences.
Sharing the PN sequence generator among all channels slightly reduces the
resource utilization of the core.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Only the N (where N is the size of the PN sequence) MSB bits of the reset
state of the PN generator should be set to 1. All other bits should be
initialized following the PN generator sequence.
Otherwise the first set of samples contain an incorrect PN sequence.
This does not increase the complexity of the PN generator, all reset values
are still constant.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
All the inputs to the framer are registered. And the framer itself does not
have any combinatorial logic, it just re-orders the wire numbering of the
individual bits.
Currently the framer module adds a output register stage, but since there
is no logic in the framer this just means that these registers are directly
connected to the output of the previous register stage.
Remove the extra pipeline register. This slightly reduces utilization and
pipeline delay of the core.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Laszlo Nagy
Istvan Csomortani
Matt Blanton
Adrian Costina
Maxim
Arpadi
AndreiGrozav
Lars-Peter Clausen