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.
Make sure that the axi_adxcvr instances are configured with the same
transceiver type as the util_adxcvr.
This is necessary for software to be able to detect the transceiver type
and support dynamic reconfiguration.
It is also necessary for correct eye scan support in the axi_adxcvr block.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Make sure that the axi_adxcvr instances are configured with the same
transceiver type as the util_adxcvr.
This is necessary for software to be able to detect the transceiver type
and support dynamic reconfiguration.
It is also necessary for correct eye scan support in the axi_adxcvr block.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
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>
Fix the location assignment of the transceiver blocks to get the correct
lane mapping.
Note that the comments indicating the expected lane mapping are correct,
but the actual transceiver location assignments were not.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
The external reference clock runs at 122.88 MHz by default. This means that
the QPLL feedback divider needs to be set to 80 so that the VCO is inside
the locking range (9.8 GHz - 16.375 GHz).
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
DAC data underflow from the DMA, was not connected to anything. This
signal should be connected to the util_rfifo, which will forward it to
the device core.
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.
Istvan Csomortani
Luca Ceresoli
Adrian Costina
AndreiGrozav
Lars-Peter Clausen
Michael Hennerich
Matt Fornero