Drc lvs fixes#4
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Fix typo in readme.
* hw: replace apb_uart with obi_uart apb_uart implements only 16750 (larger FIFO) obi_uart was developed by students at ETHZ. It implements 16550A (smaller), with plans to add an optional 16750 mode in the future. This and native obi makes obi_uart a better fit for smaller systems like croc. * test: add uart receive check via loopback mode * sw: fix relocation truncated to fit error
Tested on ETHZ tardis machines: - LVS clean - 2 metal min-area violations (very small violation, <1% off) - 17 antenna violations (mixed, majority single digit percentages over the ratio) * pdk: update cockpitrc * test: add tc_sram_impl to compile_tech * klayout: improve cockpit tech handling * tools: update to version 2025.07.pre1 * ci: fix pip install on ubuntu-latest * tools: change verilator tracing from vcd to fst FST is a binary format and a lot faster. Additionally, oseda 2025.07 segfaults with vcd tracing only. * openroad: fix final output
Tested on tardis-a29, LVS clean, <20 DRCs (all minor)
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I did not do anything extra, just include the newest croc release, which fixes the DRC/LVS issues.