Convert to using PDM

[robtaylor]

Creates a pyproject incorporating :

• requirements.txt
• requirements-dev.txt
• pyrightconfig.json
• pytest.ini

and commits a lock file

[robtaylor]

Hit a slight issue, as synthesizing gave the following error:

Warning: multiple conflicting drivers for top.\main_module.core.core.func_blocks_unifier.rs_block_0.rs.allocator.order [4]:
    port Q[0] of cell main_module.core.core.func_blocks_unifier.rs_block_0.rs.allocator.order_TRELLIS_FF_Q_3 (TRELLIS_FF)
    port Q[0] of cell main_module.core.core.func_blocks_unifier.rs_block_0.rs.allocator.order_TRELLIS_FF_Q_1 (TRELLIS_FF)
Warning: multiple conflicting drivers for top.\main_module.core.core.func_blocks_unifier.rs_block_0.rs.allocator.order [6]:
    port Q[0] of cell main_module.core.core.func_blocks_unifier.rs_block_0.rs.allocator.order_TRELLIS_FF_Q_7 (TRELLIS_FF)
    port Q[0] of cell main_module.core.core.func_blocks_unifier.rs_block_0.rs.allocator.order_TRELLIS_FF_Q_2 (TRELLIS_FF)
Preparing to run yowasp-nextpnr-ecp5. This might take a while...
ERROR: Net 'main_module.core.core.func_blocks_unifier.rs_block_0.func_unit_4.instr_valid_PFUMX_C0_Z_LUT4_Z_A_PFUMX_C0_Z[1]' is multiply driven by cell ports main_module.core.core.func_blocks_unifier.rs_block_0.rs.allocator.order_TRELLIS_FF_Q_1.Q and main_module.core.core.func_blocks_unifier.rs_block_0.rs.allocator.order_TRELLIS_FF_Q_3.Q
``

[tilk]

Hit a slight issue, as synthesizing gave the following error: (...)

I believe multiple driver error shouldn't happen with Amaranth, so this looks like an Amaranth/Yosys problem. You changed the Yosys version used, that's what probably triggered it.

[awariac]

thanks for your contribution, up-to-date pyproject development happens on #893 if interested