songruojing f4d33d2739 uart: Add a new API to get the free space size of tx buffer ...

Closes https://github.com/espressif/esp-idf/issues/8932

Closes https://github.com/espressif/esp-idf/issues/3078

(cherry picked from commit 9d73475e44)

2022-07-11 17:04:11 +08:00

..

driver

uart: Add a new API to get the free space size of tx buffer

2022-07-11 17:04:11 +08:00

esp_private

gdma: add spin lock for gdma channel

2022-04-21 10:11:20 +00:00