diff options
| -rw-r--r-- | ports/rp2/machine_uart.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/ports/rp2/machine_uart.c b/ports/rp2/machine_uart.c index c6206cebe..2431f496e 100644 --- a/ports/rp2/machine_uart.c +++ b/ports/rp2/machine_uart.c @@ -477,7 +477,7 @@ STATIC mp_uint_t machine_uart_ioctl(mp_obj_t self_in, mp_uint_t request, mp_uint if (request == MP_STREAM_POLL) { uintptr_t flags = arg; ret = 0; - if ((flags & MP_STREAM_POLL_RD) && ringbuf_avail(&self->read_buffer) > 0) { + if ((flags & MP_STREAM_POLL_RD) && (uart_is_readable(self->uart) || ringbuf_avail(&self->read_buffer) > 0)) { ret |= MP_STREAM_POLL_RD; } if ((flags & MP_STREAM_POLL_WR) && ringbuf_free(&self->write_buffer) > 0) { |