| Commit message (Collapse) | Author | Age | Files | Lines |
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Conflicts:
host/include/uhd/types/metadata.hpp
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Conflicts:
host/lib/usrp/usrp2/usrp2_impl.hpp
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Conflicts:
host/lib/usrp/usrp2/io_impl.cpp
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known state
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without flow control
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* ise12:
fix timing problem on DAC output bus
clean up DAC inversion and swapping to match schematics
Clean up iq swapping on RX. It is now swapped in the top level. widened muxes to 4 bits to match tx side and handle more ADCs in future
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| | | | | | |_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|/ / / / / / / / / / /
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margin on reads from the SRAM at the expense of Writes to the SRAM.
Tested to be at least as stable as a phase shift of 12 and beter looking timing on the logic analyzer.
Signals driven by the FPGA are observed changing on the SRAM pins about 4 nS after the rising edge of the RAM clock.
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SRAM clock.
Set phase shift to -12 after experimentation using logic analyzer to see results.
This value gives near optimum 1.5nS setup times on the source sync signals FPGA -> SRAM
under lab conditions.
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its presentation externally at the NoBL SRAM.
Since we don't have a board level trace to use to estimate clock propigation delay we just loop through the I/O on the FPGA.
This hasn't been verified as working on a USRP2 yet.
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efifo_merge
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packed into IOBs
Explcit drives and skews added to GPIO pins
Corrected minor error in FIFO logic that showed data avail internally incorrectly
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* ise12_efifo_work:
Regenerated FIFO with lower trigger level for almost full flag to reflect logic removed from nobl_fifo.
Conflicts:
usrp2/vrt/vita_tx_deframer.v
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logic removed from nobl_fifo.
Improved ext_fifo_tb further, try to simulate more combinations of decomation rates and packet arrival patterns.
Strip out the logic in nobl_fifo that made it look like a Xilinx fall-through FIFO...it is now very simple logic but a propriatory interface that exposes the high inetrnal latency of reads.
Allow the USED size of the external FIFO to be parameterized from the core level. Currently set at only 256
Corrected a bug in vita_tx_deframer.v that can write to a FIFO when its full causing illegal state.
Made further edits that are currently commented becuase simulation indicates they cause problems, however suspect a further bug is in this code.
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