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FPGA can interfere with bootloader's use of USB on older Cynthions

Open mossmann opened this issue 1 year ago • 1 comments

This affects Cynthion r0.1-r0.5. It should be possible to have Saturn-V hold the Sideband PHY in reset and/or prevent FPGA configuration.

mossmann avatar May 08 '24 16:05 mossmann

This is fixed for hardware revisions r0.3 through r0.5 in #16. There is still a problem on r0.1 and r0.2, but we aren't motivated to fix it. For now, Sideband PHY usage is unsupported on r0.1/r0.2.

mossmann avatar May 16 '24 16:05 mossmann