robert-hh ca63ead2d8 samd/mphalport: Add a timeout to mp_hal_stdout_tx_strn().
If USB CDC is connected and the board sends data, but the host does not
receive the data, the device locks up.  This is fixed in this commit by
having a timeout of 500ms, after which time the transmission is skipped.
2022-11-09 11:15:24 +11:00
..