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RP2040: Touching UART RX pin or adding a jumper to nowhere causes hang #6237

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dhalbert opened this issue Apr 4, 2022 · 1 comment
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RP2040: Touching UART RX pin or adding a jumper to nowhere causes hang #6237

dhalbert opened this issue Apr 4, 2022 · 1 comment
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bug busio rp2040 Raspberry Pi RP2040
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7.2.x

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dhalbert commented Apr 4, 2022

More precise reporting of #6219. This is not really related to #6213 after all.

Running this on or after commit 749bb99 (between 7.2.0-alpha.1 and .2), and then touching the RX pin, will cause a hard crash of some kind.

That particular commit updates the pico-sdk to 1.3.0.

import board
import busio

uart = busio.UART(board.TX, board.RX)
uart.baudrate = 115200  # _might_ make it easier to provoke

i = 0
while True:
    data = b'................................................................................................................................................................'
    print(i, data)
    i += 1
    uart.write(data)
@dhalbert dhalbert added bug busio rp2040 Raspberry Pi RP2040 labels Apr 4, 2022
@dhalbert dhalbert added this to the 7.2.x milestone Apr 4, 2022
@dhalbert dhalbert self-assigned this Apr 4, 2022
@dhalbert dhalbert mentioned this issue Apr 4, 2022
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@dhalbert dhalbert changed the title RP2040: Touching UART RX pin or leaving it unattached causes hang RP2040: Touching UART RX pin or add a jumper to nowhere causes hang Apr 4, 2022
@dhalbert dhalbert changed the title RP2040: Touching UART RX pin or add a jumper to nowhere causes hang RP2040: Touching UART RX pin or adding a jumper to nowhere causes hang Apr 4, 2022
This was referenced Apr 5, 2022
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dhalbert commented Apr 5, 2022

Addressed by #6240.

@dhalbert dhalbert closed this as completed Apr 5, 2022
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bug busio rp2040 Raspberry Pi RP2040
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