The cores that handle the JESD204 ADC cores do not feature IQ correction
logic. The Q_OR_I_N parameter for the channel modules is unused, so remove
it.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
The cores that handle the JESD204 ADC converters do not feature any direct
IO and subsequently no IO-delay blocks either. Remove the unused
IO_DELAY_GROUP parameter.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Bundle the TLAST signal in with the other AXIS slave signals to enable
easier connection between AXIS devices that use TLAST
Signed-off-by: Matt Fornero <matt.fornero@mathworks.com>
Add some limit TLAST support for the streaming AXI source interface. An
asserted TLAST signal marks the end of a packet and the following data beat
is the first beat for the next packet.
Currently the DMAC does not support for completing a transfer before all
requested bytes have been transferred. So the way this limited TLAST
support is implemented is by filling the remainder of the buffer with 0x00.
While the DMAC is busy filling the buffer with zeros back-pressure is
asserted on the external streaming AXI interface by keeping TREADY
de-asserted.
The end of a buffer is marked by a transfer that has the last bit set in
the FLAGS control register.
In the future we might add support for transfer completion before all
requested bytes have been transferred.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Commit ff50963c7f ("axi_ad9361- altera/xilinx reconcile- may be broken-
do not use") inverted the polarity of the TX feedback clock.
This exposed some issues in the existing drivers which can cause the
interface tuning to fail randomly under certain conditions.
To keep backwards compatibility with existing drivers restore the previous
behavior.
A separate fix will be applied to the drivers that resolves the issue that
has been exposed by the polarity inversion. So that interface calibration
works reliably under all conditions.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Assigning the value of a local parameter(localparam) to a parameter
will end up with a conflict(not highlighted by the tool). In this
case, the parameter type was defined as a string instead of an
integer. Furthermore, this scenario leads to an undesired choice
between primitive types.
The dma_last_beats is used by the Avalon Memory Mapped interface
controller, to define the last burst length.
Its value get stable after the last valid data of the DMA interface, and staying
stable until the positive edge of the DMA's xfer_req.
No need to condition the transfer of this register to avalon clock
domain.
The XFER_END state defines the end of a transaction, when the entire
data set is written or read to/from the DDRx memory.
A transaction can contain multiple Avalon bursts. Make sure that the FSM
goes back into staging phase at the end of each burst; also define a
signals which indicate the end of each burst for control.
The period_count should be updated once per clock cycle. This is not
enforced with the current implementation, which probably leads to
period_count being decremented on both m_axis_aclk edges.
A problem observed due to this is that the m_axis_tlast output is not
asserted or is asserted for a too short time for the consumer to
detect it.
Fix by letting the decrement (and thus the m_axis_tlast toggling)
happen only on the rising edge of the m_axis_aclk clock.
Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
The commit 6900c have added an additional register stage into the fifo read
data path, but the control signals (ready/valid/underflow) were not realigned
to the data. This can cause data lose or duplicated samples in some case.
Realign the control signals to the data.
The util_adxcvr supports GTX2, GTH3 and GTH4. The transceiver is selected
using the XCVR_TYPE parameter.
The axi_adxcvr on the other hand only has a configuration parameter to
indicate whether a GTX or GTH transceiver is used (GTH_OR_GTX_N). Since
there are some minor differences between GTH3 and GTH4 that software needs
to know about rename the GTH_OR_GTX_N to XCVR_TYPE and match use the same
semantics as util_adxcvr.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
The dac_xfer_req should indicate one single thing, that the FIFO is in
read phase. Should not be affected by any signals, which indicates data
validity on any interface. (e.g. dac_valid)
This signal is not used by the device core, its main purpose is to
indicate the state of the interface for a posible intermediat processing
module.
Fix the reset of the dma_mem_waddr (write address register of the CDC
FIFO on DMA's clock domain). This solves the occasional invalid read backs after
multiple re-initialization of the PL_DDR_FIFO.
+ 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)
If the ADI_HDL_DIR or ADI_PHDL_DIR are set on Windows platforms, an
invalid TCL character (e.g. backslash) may be used as a file separator,
causing issues with the build / library scripts.
Normalize the paths before using them as global TCL variables.
The first attempt (f3daf0) faild miserably. When the data_req signal
from the device had more than 1 cycle of deassert state, because of the
added latency of the data stream, the device got 'zeros' too.
In this fix, the DMA will hold the valid data on the bus, between two
consecutive data request. The bus is reseted just after all the data
were sent out.
The grey coder/decoder function was limited to 10 bits, and this
resulted an unwanted limitation of the FIFO size. Using this
module, the coder/decoder data width can be adjusted to the current
address width.
Reset the fifo_rd_data if the DMA does not have an active transfer.
Becasue all the DAC device cores are transfering the data from the FIFO
interface to the data interface without any validation signal, DMA needs to put
the data bus into a known state, to prevent the device core to send the
last known data again and again.
Add missing timing exceptions on paths between the DMA and DDR clock
domains. All these paths are properly synchronized using CDC in the HDL,
but are missing timing exceptions in the XDC file. This can lead to timing
errors when building a design using the axi_adc_fifo.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Export the reset signal for the link clock domain. This can be used by
external logic that is in the link clock domain to reset itself.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Enabling the phase alignment mode of the FPLL seems to break manual
re-calibration, which is required when changing the lane rates. The
calibration seems to select the wrong VCO frequency band and the PLL no
longer locks.
Disable phase alignment mode for now, this has a negative effects on
deterministic latency, but it is better than not working at all.
Waiting for feedback from Altera/Intel on how to make manual re-calibration
work in phase alignment mode.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
To be able to check the FPLL re-configuration arbitration status from
software enable the avmm_busy flag in the register map.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
The DEGLITCH state of the RX state machine is a workaround for misbehaving
PHYs. It is an internal state and an implementation detail and it does not
really make sense to report through the status interface.
Rework things so that DEGLITCH state is reported as part of the CGS state
on the external status interface.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
The current layout of the debug ID register assumes that the ID_WIDTH is 3.
Change things so that the padding 0 width depends on the ID_WIDTH
parameter so that we end up with the same register layout regardless of the
value of ID_WIDTH.
Also split things into two registers, this allows for an ID_WIDTH up to 8
(which should hopefully be enough for all practical applications).
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Redesign the axi_dacfifo, to increase the supported datarates.
Major modifications:
+ The FIFO consist of two module: WRITE and READ. The axi_dacfifo_dac
was deprecated.
+ Both the AXI write and AXI read transaction are controlled by two
FSM, to increase redability of the code.
+ Support all the possible burst lengths [0..225], handles the last
fractional burst on both sides correctly.
+ Common reset architecture throughout the design, all the internal
registers and memories are reset on the posedge of dma_xfer_req
+ Delete all Altera related sources, for Altera projects
avl_dacfifo should be used.
WIP: foobar
[WIP]axi_dacfifo: Update
axi_dacfifo: Few minor updates, almost working state
Add a wrapper module for Altera/Intel platforms that instantiates and
connects all the components required to for a JESD204 link.
The following components are created:
* Transceiver for each lane
* Transceiver lane PLL (TX only)
* Transceiver reset controller
* Link PLL
* JESD204 link layer processing
* JESD204 link layer processing control interface
* axi_adxcvr link management peripheral
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Add a wrapper that instantiates the Arria10 Native PHY and configures it
for JESD204 operation. The datapath width is set to 4 octets per beat.
The maximum lane rate that is achievable with hard-logic PCS included in
the PHY is below the requirements of the JESD204 for some of the PHY speed
grades. For projects that require a lane rate that is higher than what the
hard-logic PCS can support a soft-logic PCS module can be instantiated. The
external interface of the jesd204_phy is identical regardless of whether
soft- or hard-logic PCS is used.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Add soft logic PCS that performs 8b10b encoding for TX and character
pattern alignment and 8b10b decoding for RX.
The modules are intended to be used in combination with a transceiver that
does not have these features implemented in hard logic PCS.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Add Qsys IP scripts as well as SDC constraint files for the ADI JESD204
peripherals. This allows them to be instantiated and used on Altera/Intel
platforms.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
The Xilinx tools are quite forgiving when it comes to required signals on
standard interfaces, which is why it was possible to define a AXI streaming
interface without the required valid signal.
The Altera tools are more strict and wont allow this. Add a dummy valid
signal to the TX data interface to make the tools happy. For now the signal
does not do anything, in the future it might be used to detect an underflow
condition on the data interface and report this through the status
interface.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Currently the ILAS memory for the receive register map uses a shift
register with variable tap output for storing the ILAS information. This
maps very efficiently onto the primitives found in Xilinx FPGAs. But there
is no equivalent primitive in Altera FPAGs resulting in increased
utilization from having to implement the structure in pure logic.
Change the ILAS memory so it uses a simple dual port RAM for storing the
data. This has slightly increased utilization on Xilinx platforms (but
still good enough) and highly decreased utilization on Altera platforms.
One side effect of this change is that since the RAM output is synchronous
reading the ILAS memory registers will take one extra clock cycle.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Add a set of helper functions for the CDC library that creates the correct
constraints for the CDC blocks. This makes it easier to specify the
constraints in the individual user's SDC files.
This only works for Altera where full scripting capabilities are available
in the SDC files.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Allow to specify additional properties when defining a IP parameter. The
properties take the form of a list of key value pairs. E.g.
ad_ip_parameter ... { \
DISPLAY_NAME "Name" \
DISPLAY_HINT "radio" \
}
This helps to reduce the amount of boilerplate when additional properties
need to be specified for a parameter.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
TCL files can be helpful to automate certain tasks like creating timing
constraints. Add handling for them to the ad_ip_addfile function.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Currently the reset for the link clock domain is generated internally in
the axi_jesd204_{rx,tx} peripheral. The reset is controlled by through the
register map.
Add an additional external reset for link clock domain. The link clock
domain is kept in reset if either the internal reset or the external reset
is asserted.
This for example allows the fabric to keep the domain in reset if the clock
is not yet stable.
The status of the external reset can be queried from the register map.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
dma_raddr is only incremented if it is less than dma_waddr_rel_s.
dma_waddr_rel_s is always less or equal to adc_waddr_rel << RATIO and
adc_waddr_rel is less than DMA_ADDR_LIMIT >> RATIO.
By induction we can conclude that this means that dma_raddr will always be
less then DMA_ADDR_LIMIT and the check for this will always evaluate to
false can be removed.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
When the DMA clock to ADC data rate ratio exceeds a certain threshold it is
possible that an erroneous dma_waddr_rel toggle event is generated. This
causes the last address of the previous DMA transfer to be transferred to
the DMA domain. And the DMA side will start reading from the FIFO even
though data is not available yet.
This results in data corruption with the current transfer containing data
from the previous transfer.
The root cause here is that the toggle signal CDC synchronizer register are
reset in the DMA when a new transfer starts, but not in the ADC domain,
causing a potential mismatch and the incorrect toggle event. To fix this
remove the reset from the DMA side. This is OK since the registers are
self-resetting if the reset signal is asserted for more than 3 clock cycles.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
AND logic means that all enabled triggers need to evaluate to true, others
are don't care. Fix the logic to behave accordingly.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
At the moment the drain signal is always asserted when the controller is
enabled. This breaks backpressure and data is lost. The drain signal should
only be asserted when the controller gets disabled until the last beat of
the current DMA transfer.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
The 'PRIMITIVE_SUBGROUP == flop' filter only works on 7-Series. Replace it
with 'IS_SEQUENTIAL' which works on both 7-Series and UltraScale.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
In its default configuration the ram_2port module as a read latency of 2
clock cycles. Both the read address as well as the output data are
registered.
This is not the behavior that is expected from the alt_mem_asym module and
causes incorrect behavior and data corruption in the util_adc_fifo.
Disable the data output register to get a read latency of 1 clock cycle.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Name all CDC blocks following the patter i_cdc_${signal_name}. This makes
it clear what is going on.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Use the CDC sync_bits helper to synchronize the asynchronous external SYNC~
signal into the link clock domain, rather than open-coding this operation.
This makes it more explicit what is going on.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Which events will be exposed as IRQs and at what level of granularity will
need some additional through. Remove the two existing IRQ events for now
again. This will be added back later.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
The up_cfg_ilas_data signal is a two dimensional array. There are 4
register entries for each lane. Model it as such rather than compressing it
down to a one dimensional array. This makes accessing the individual
entries a bit more straight forward and the code clearer.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
The ilas_cfg_static.v is part of the jesd204_tx_static_config module.
Somehow a copy of that file made it into the jesd204_tx module where it is
completely unused. Remove the duplicated file.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
We know that NUM_OF_LANES will never exceed 255, but the tools don't know
and generate a warning about implicit signal truncation. Make the
truncation explicit to indicate that this is intentional.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
+ update to verilog-2001 coding standard
+ define RATIO outside the generate block
+ $clog2 macro is not supported by some tools, define function
locally
The CIC filter introduces different amplifications depending on the
decimation ratio. By adding a multiplier in the decimation chain
the amplification can be compensated
The ADI transport layer peripherals expect the first octet to be in the
LSBs and the last octet to be in the MSBs. The Altera JESD204 core orders
the octets the other way around though, first octet in the MSBs and last
octet in the LSBS.
Currently this is handled by having each transport layer peripheral swap
the octets around when it is connected to the Altera JESD204 core.
Change this so that rather than having to do the data swizzling in every in
every transport layer peripheral perform it at the input/output of the link
layer peripheral inside the generated block.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Currently the TX lane mapping is implemented by having to connect tx_phy_s_* to
the tx_ip_s_* and the tx_phy_d_* to the tx_ip_d_* signals in the system
qsys file in the desired order.
Re-work things so that instead the lane mapping is provided through the
TX_LANE_MAP parameter. The parameter specifies in which order logical lanes
are mapped onto the physical lanes.
The appropriate connections are than made inside the core according to this
parameter rather than having to manually connect the signals externally.
In order to generate a 1-to-1 mapping the TX_LANE_MAP parameter can be left
empty.
This change slightly reduces the boiler-plate code that is necessary to
setup the transceiver.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
The CIC filter introduces different amplifications depending on the
interpolation ratio. By adding a multiplier in the interpolation chain
the amplification can be compensated
+ Add a HDL parameter for the PPS receiver module :
PPS_RECEIVER_ENABLE. By default the module is disabled.
+ Add the CMOS_OR_LVDS_N and PPS_RECEIVER_ENABLE into the CONFIG
register
+ Define a pps_status read only register, which will be asserted, if the free
running counter reach a certain fixed threshold. (2^28) The register can
be deasserted by an incomming PPS only.
Make sure that the right hand side expression of assignments is not wider
than the target signal. This avoids warnings about implicit truncations.
None of these changes affect the behaviour, just fixes some warnings about
implicit signal truncation.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
The AXI specification that the minimum address space size is 4k, make sure
the axi_dmac adheres to this.
Internally the register space is still 2k. This means the upper and lower
2k of the axi4lite register space will map to the same internal registers.
Software must not rely on this and only access the lower 2k to enable
compatibility in case the internal space grows in the future.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Terminate the m_axi_list signal of the data mover instance in the
src_axi_stream module. This avoids a warning about the port being
unconnected.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Currently the axi_dmac_hw.tcl script does not create interfaces if they
are not used in the current configuration. This has the disadvantage that
the ports belonging to these interfaces are not included in the generated
HDL wrapper. Which will generate a fair bunch of warnings when synthesizing
the HDL.
Instead always generate all interfaces, but disable those that are not used
in the current configuration. This will make sure that the ports belonging
to these interfaces are properly tied-off in the generate wrapper HDL.
This reduces the amount of false positive warnings generated and makes it
easier to spot actual issues.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
The DMAC currently doesn't support transfers where the length is not a
multiple of the bus width. When generating the wstrb signal we do pretend
though that we do and dynamically generate it based on the LSBs of the
transfer length.
Given that the other parts of the DMA don't support such transfers this is
unnecessary though. So remove it for now and replace it with a constant
expression where wstrb is always fully asserted.
The generated logic for the wstrb signal was quite terrible, so this
improves the timing of the core.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Currently the read side of the src_response interface is not used. This
leads to warnings about signals that have a value assigned but are never
read.
To avoid this just comment out all signals that are related to the
src_response interface for now.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Make sure that the right hand side expression of assignments is not wider
than the target signal. This avoids warnings about implicit truncations.
None of these changes affect the behaviour, just fixes some warnings about
implicit signal truncation.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
The external s_axi_{awaddr,araddr} signals that are connect to the core
have their width set according to the specified size of the register map.
If the s_axi_{awaddr,araddr} signal of the core is wider (as it currently
is for many cores) the MSBs of those signals are left unconnected, which
generates a warning.
To avoid this make sure that the signal width matches the declared register
map size.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Currently the util_upack_hw.tcl script does not create interfaces if they
are not used in the current configuration. This has the disadvantage that
the ports belonging to these interfaces are not included in the generated
HDL wrapper. Which will generate a fair bunch of warnings when synthesizing
the HDL.
Instead always generate all interfaces, but disable those that are not used
in the current configuration. This will make sure that the ports belonging
to these interfaces are properly tied-off in the generate wrapper HDL.
This reduces the amount of false positive warnings generated and makes it
easier to spot actual issues.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Currently the util_cpack_hw.tcl script does not create interfaces if they
are not used in the current configuration. This has the disadvantage that
the ports belonging to these interfaces are not included in the generated
HDL wrapper. Which will generate a fair bunch of warnings when synthesizing
the HDL.
Instead always generate all interfaces, but disable those that are not used
in the current configuration. This will make sure that the ports belonging
to these interfaces are properly tied-off in the generate wrapper HDL.
This reduces the amount of false positive warnings generated and makes it
easier to spot actual issues.
While we are at it also use a loop to create the interfaces since they all
follow the same pattern.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Currently the axi_ad9144_hw.tcl script does not create interfaces if they
are not used in the current configuration. This has the disadvantage that
the ports belonging to these interfaces are not included in the generated
HDL wrapper. Which will generate a fair bunch of warnings when synthesizing
the HDL.
Instead always generate all interfaces, but disable those that are not used
in the current configuration. This will make sure that the ports belonging
to these interfaces are properly tied-off in the generate wrapper HDL.
This reduces the amount of false positive warnings generated and makes it
easier to spot actual issues.
While we are at it also use a loop to create the interfaces since they all
follow the same pattern.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
The width of a ternary operator expression is the width of the wider of the
two selectable expression. This means the right side expression of the
tx_data assigment is always 256 bits. This generates an implicit truncating
warning if the tx_data signal itself is only 128 bits.
To avoid this slightly reformulate the expression to yield the correct
width depending on the configuration.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
The width of a ternary operator expression is the width of the wider of the
two selectable expression. This means depending on the selected DMA_RATIO
the right side expression of the dma_waddr_rel_s assignment can be up to
three bits wider than the dma_waddr_rel_s signal. This generates an
implicit truncation warning.
Slightly reformulate the expression without the use of the ternary operator
to avoid this warning.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
The signal is called adc_clk and not adc_clock. None of the designs is
currently using the signal, so this hasn't been an issue other that it
generates a warning.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Comments starting with the word altera are interpreted by the Altera tools
to be synthesis attribute assignments. In this case this is just a generic
comment though which results in a warning that the synthesis attribute is
unknown.
Slightly reword the comment to avoid this. This is not pretty, but better
than having the false positive warning show up in the log.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
The PLL frequency must be half of the lane rate and the core clock rate
must be lane rate divided by 40. There is no other option, otherwise things
wont work.
Instead of having to manually specify PLL and core clock frequency derive
them in the transceiver script. This reduces the risk of accidental
misconfiguration.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
The clock bridge expects the clock rate to be specified in Hz, but
$m_coreclk_frequency is in MHz. Do the appropriate conversion.
Nothing seems to rely on the clock bridge reporting the correct frequency
at the moment, so this is only a cosmetic change.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
The ad_pps_receiver is instantiated at the top of core.
The rcounter is placed into adc/dac_common registers space, at the
address 0x30 (word aligned).
The interrupt mask is placed into adc/dac_common, at the address 0x04
(word aligned). Because the core has an instance of both modules, the
interrupt masks are OR-ed together.
Add a module to receive 1PPS signal from a GPS module. The module has a
free running counter, which runs on the device's interface clock. The
counter value is latched into a register each time when a 1PPS arrives.
An interrupt signal is also generated in every 1PPS.
Add a check to RX register map to confirm that the ILAS memory registers
return the correct values after the ILAS data has been received.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
The MSB of the d_count signal is used as a overflow marker to stop the
counter from incrementing in the monitored clock domain. It is not exported
through the register map and truncated when assigned to the up_d_count
signal.
Make the truncation explicit to make it clear that this is not a mistake
and to avoid warnings about implicit truncation.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
The generic Altera clock monitor constraints expect the instance to be
called i_clock_mon. Adjust the code accordingly.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
In this particular case the behaviour is the same with non-blocking and
blocking assignments, but that could change if the code is modified in the
future. To avoid any potentially issue due to this consistently use
non-blocking assignments.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
The axi_dmac can issue up to FIFO_SIZE read and write requests in parallel.
This is done in order to maximize throughput and compensate for for
latency.
Set the {read,write}IssuingCapability properties accordingly on the AXI
master interfaces. Otherwise qsys might decide to insert bridges that
artificially limit the number of requests, which in turn might affect
performance.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Qsys allows to query to query the clock domain that is associated with a
clock input of a peripheral. This allows to automatically detect whether
the different clocks of the DMAC are asynchronous and CDC logic needs to be
inserted or not.
Auto-detection has the advantages that the configuration parameters don't
need to be set manually and the optional configuration will be choose
automatically. There is also less chance of error of leaving the settings
in a wrong configuration when e.g. the clock domains change.
In case the auto-detection should ever fail configuration options that
provide a manual overwrite are added as well.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Adrian Costina
Istvan Csomortani
Lars-Peter Clausen
AndreiGrozav
Matt Fornero
Luca Ceresoli
Rejeesh Kutty