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RP2040 busio.UART not freeing pin after detecting invalid pins #9424

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dhalbert opened this issue Jul 12, 2024 · 0 comments · Fixed by #9425
Closed

RP2040 busio.UART not freeing pin after detecting invalid pins #9424

dhalbert opened this issue Jul 12, 2024 · 0 comments · Fixed by #9425
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busio rp2040 Raspberry Pi RP2040
Milestone
9.1.x

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@dhalbert
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dhalbert commented Jul 12, 2024 •
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Adafruit CircuitPython 9.1.0-rc.0 on 2024-07-09; Adafruit Metro RP2040 with rp2040
>>> import board, busio
>>> u = busio.UART(board.SDA, board.SCL)
>>> u.deinit()
>>> u = busio.UART(board.SDA, board.SCL)
>>> u.deinit()
>>> u = busio.UART(board.SDA, board.A0)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: Invalid pins
>>> u = busio.UART(board.SDA, board.A1)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: SDA in use

SDA should not be in use.

User in discord encountered this when trying to run the Where's My UART code.
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busio rp2040 Raspberry Pi RP2040
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rp2040: uart: check all pins before claiming any jepler/circuitpython
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@dhalbert