Scott Shawcroft bea955222a
Improve USB to Serial/JTAG TX
It had a tight 5ms timeout before that caused some characters to
drop. Now the wait is longer and reset after a successful transmit.
This follows what MicroPython does.

Fixes #6220
2022-07-27 12:15:13 -07:00
..
2022-07-27 12:15:13 -07:00