The number of delay taps in the LA data path can be controlled manually, from
the regmap or automatically, according to the axi_adc_decimate's rate.
Moreover, because the rate is configure by software, and the time of
initialization, is different for the ADC path and LA path. There is an
uncertainty of plus/minus one sample between the two. Because ADC and LA
paths share the same clock we can easily synchronize the two paths. We
can't use reset, because the rate generation mechanism is different
between the two. So the ADC path is used as master valid generator and we
can use it to drive the LA path.
The synchronization is done by setting the rate source bit. This
mechanism can only be used if the desired rate for both path is equal,
including oversampling fom ADC decimation.
Adds information on:
- Log 2 of interface data widths in bits
- Interface type (0 - Axi MemoryMap, 1 - AXI Stream, 2 - FIFO ) .
Lets the driver discover interface widths and interface type settings,
this will deprecate the corresponding device tree properties.
This is useful in case of parametrized projects where the width of
the datapath is changing. This change will allow the use of a generic
device tree node.
Updated version to 4.3.a
All input and output delays should be referenced to a virtual clock.
If the input and output delays reference base clocks or PLL clocks rather than
virtual clocks, the intra- and inter-clock transfer clock uncertainties,
determined by derive_clock_uncertainty, are incorrectly applied to the I/O ports.
See mnl_timequest_cookbook.pdf for more info.
By defualt the supported tool chain is Quartus PRO. If you want to
build the project with Quartus Standard, you need to define an environment
variable called QUARTUS_PRO_ISUSED with the value 0. (e.g. export
QUARTUS_PRO_ISUSED=0 )
Note: Not all projects going to build on Quartus Standard, you should
fix the errors if there is any.
Optimize the oversampling mechanism.
The behavior of the axi_dac_interpolate was changing if a debug module was
added to the core.
The current code has a better utilization and reliability.
When using an oversampling of 2 for axi_dac_interpolate the rate was
the same as with oversampling by 1(bypassing).
This commit removes the bypass for the ratio of 2.
AndreiGrozav
Laszlo Nagy
Istvan Csomortani