When channels are not swapped in groups of four but are completely out of order
the common control channel can't be reordered based on the index of the
channel.
The DDR controller for C2 for is much closer to the transceivers which
connect to the FMCp connector so designs does not have to span over all
three SLRs just over two reducing implementation and timing closure effort.
When using a non-maximum sampling rate the data is captured earlier by two
samples.
After the initial trigger jitter fix, a low latency/utilization was
desired(one sample delay for the trigger detection). After adding the
instrument trigger an equal latency between ADC and LA was required, hence the
need for a two sample delay on the trigger path. The delay was implemented
as two clock cycle delays not two sample delays.
This commit fixes this issue and offers a more robust design.
A trigger jitter was added by fix on the external trigger input. It
manifests at input sampling frequencies lower than the maximum frequency.
Added the required reset and CE(valid) signal to the last output
stages of the trigger to obtain the desired functionality for all
sampling rates.
The extra delay was added on the trigger and data paths to compensate
for the logic analyzer changes.
The extra delay will be also seen on the m2k daisy chain. The
delay between devices will be increased from 3 to 4 samples delay.
Fix external trigger for low sampling rates.
Because the external trigger can be a short pulse at high decimation rates
there is a high chance that the pulse will be missed.
xsim does not like if a register or wire is used before their
definition. Make sure the every register and wire is defined before it's
used the first time.
The second ADC was removed from the project, as the EV-AD7768-1FMCZ evaluation
board contains only one ADC. Therefore, all the IPs related to the
second ADC have been removed, too.
The data width supported by the spi IPs has been changed from 8 bits to
32 bits, therefore the axis_upscaler(util_axis_upscale_v1_0) and the
m_axis_samples_24(AXI4-Stream Data Width Converter) are no more necessary,
so they have been removed from the design.
The 24 bits width data transfer between the s_axis of axi_ad77681_dma
(AXI DMA Controller) and the offload_sdi of the spi_engine_offload is now made
directly.
AndreiGrozav
Laszlo Nagy
Adrian Costina
Istvan Csomortani
Arpadi
Stanca Pop