serial: add txSpaceAvailable function (#26069)

* serial: add txSpaceAvailable function * serial: txSpaceAvailable and bytesAvailable fixups
2026-10-14 14:43:34 +08:00 · 2025-12-12 09:31:33 -09:00
parent 12745baf6c
commit b92d21bd31
8 changed files with 74 additions and 3 deletions
@@ -62,6 +62,7 @@ public:
 	bool close();

 	ssize_t bytesAvailable();
+	ssize_t txSpaceAvailable();
 	ssize_t read(uint8_t *buffer, size_t buffer_size);
 	ssize_t readAtLeast(uint8_t *buffer, size_t buffer_size, size_t character_count = 1, uint32_t timeout_ms = 0);