amaranth-lang/amaranth-boards

Nexys4DDR: I/O standard should be different for some switches

Closed this issue 3 years ago · 2 comments

neuschaefer commented 3 years ago

On the Nexys4DDR board, two of the 16 slide switches (SW8/T8, SW9/U8) are connected to 1.8V rather than 3.3V:

This is currently not reflected in the board definition, but probably should be.

whitequark commented 3 years ago

Would you be willing to send a PR? Here is an example of how to use SwitchResources with two different IO standards: https://github.com/nmigen/nmigen-boards/blob/6bbd2dd89f78f38f11ec497e34d4cddf8aae88dc/nmigen_boards/ecp5_5g_evn.py#L58-L61

neuschaefer commented 3 years ago

Yes, will do. Thanks for the guidance.