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gatecat / nextpnr-xilinx

Experimental flows using nextpnr for Xilinx devices
ISC License
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ODELAY implementation works #62

Closed hansfbaier closed 1 year ago

hansfbaier commented 1 year ago

LiteX K7DDRPHY seems to work nicely with the results of the fuzzer you gave me. Building this design: https://github.com/kintex-chatter/demo-projects/tree/main/litex-ddr-stlv7325 I got two out of eight DDR3 modules working (four or more would have software crashes/erratic execution, probably timing issues because of increased congestion): Left is vivado, right is nextpnr-xilinx: image This PR is based on the IDDR PR (https://github.com/gatecat/nextpnr-xilinx/pull/61). This PR also needs the corresponding changes in nextpnr-xilinx-meta: https://github.com/gatecat/nextpnr-xilinx-meta/pull/3 I

hansfbaier commented 1 year ago

@gatecat I just rebased this branch on xilinx-upstream. Thanks for merging.