diff options
| author | Damien George <damien.p.george@gmail.com> | 2018-03-14 13:18:43 +1100 |
|---|---|---|
| committer | Damien George <damien.p.george@gmail.com> | 2018-03-14 13:18:43 +1100 |
| commit | 34e224a4afbacbc8f1621c415b6d3fc42ed84cb8 (patch) | |
| tree | c552e8109f6f4bf80e8bccad592d230487a12591 | |
| parent | bdc875e602f687bf0fb28c3a18565ffec4157f59 (diff) | |
esp32/machine_uart: Return None from UART read if no data is available.
This is instead of returning an empty bytes object, and matches how other
ports handle non-blocking UART read behaviour.
| -rw-r--r-- | ports/esp32/machine_uart.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/ports/esp32/machine_uart.c b/ports/esp32/machine_uart.c index 06d9c0b0d..26cbc88fc 100644 --- a/ports/esp32/machine_uart.c +++ b/ports/esp32/machine_uart.c @@ -297,7 +297,7 @@ STATIC mp_uint_t machine_uart_read(mp_obj_t self_in, void *buf_in, mp_uint_t siz int bytes_read = uart_read_bytes(self->uart_num, buf_in, size, time_to_wait); - if (bytes_read < 0) { + if (bytes_read <= 0) { *errcode = MP_EAGAIN; return MP_STREAM_ERROR; } |