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mimxrt/machine_uart: Set the UART ioctl write poll flag properly.

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It was always set to True.  The change adds a check to the tx status flag
which is set when all data is transferred.
This commit is contained in:
robert-hh 2022-08-18 11:36:08 +02:00 committed by Damien George
parent 0f048a5a2a
commit 443fbcf81c
1 changed files with 1 additions and 1 deletions
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ports/mimxrt/machine_uart.c
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@ -437,7 +437,7 @@ STATIC mp_uint_t machine_uart_ioctl(mp_obj_t self_in, mp_uint_t request, mp_uint
ret |= MP_STREAM_POLL_RD;
}
}
if ((flags & MP_STREAM_POLL_WR)) {
if ((flags & MP_STREAM_POLL_WR) && (self->tx_status == kStatus_LPUART_TxIdle)) {
ret |= MP_STREAM_POLL_WR;
}
} else if (request == MP_STREAM_FLUSH) {