tone() will not work on nrf52840

[Tasm-Devil]

Hi,

i get a NameError when calling tone() a second time.
Line 63 square_wave_sample = audioio.RawSample(square_wave) uses a module that is probably not imported on some boards (e.g. nrf52840 Express).

Line 63 should never been executed but it will because a ValueError is thrown in Line 53 when calling tone() and creating the PWMOut-Object a second time.

Thats strange because you would assume, using the with-statement will deinitialize the used Pin. I assume, the deinit is faulty.

Anyone an idea, where to fix this.

[kattni]

I'm not sure what the problem was at the time that this issue was created. CircuitPython has had updates since that time that are now the reason why the nRF52840 doesn't work with simpleio.tone(). Closing in favor of #45.