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