tree 889d4da7f56f09a2bbf22ce2484657950b757787
parent af2540b045e585db715939f06943a4739a0f0eed
author Jonathan Bell <jonathan@raspberrypi.com> 1710777148 +0000
committer P33M <2474547+P33M@users.noreply.github.com> 1710777695 +0000

cdc_acm: turn on UART_TX LED when sending break signals

Software typically asserts line break for an extended period
(e.g. PuTTY will assert continuously until the next keypress), so
provide feedback via the LED.

Also declare variables used in both tinyusb callback and uart_thread context
as volatile.