Günther Jena

Instead of yield it's easier to use `self.notify()`. For `MapThreaded` a threadsafe variant with `loop.call_soon` should be implemented.

I guess a PLL reset would be required (like `si5351.pll_reset(SI5351_PLL_RESET_A)`)

`Board.goal_test()` is used and called by the solvers. No external libraries used (only python standard libraries).

I have the same problem and can confirm the strange chip select behavior.