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Posted to commits@nuttx.apache.org by bt...@apache.org on 2020/12/04 06:43:04 UTC
[incubator-nuttx] 01/02: imxrt:imxrt_lowputc Fixed parity settings.
This is an automated email from the ASF dual-hosted git repository.
btashton pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/incubator-nuttx.git
commit 4aa7ba827bc7a5bf7bdb8d48dcfb844422c6ed50
Author: David Sidrane <Da...@NscDg.com>
AuthorDate: Thu Dec 3 06:09:41 2020 -0800
imxrt:imxrt_lowputc Fixed parity settings.
imxrt UART must be placed in 9 bit mode (M=1) with when 8 bit
data with parity is required. If left in 8 bit mode (M=0) with
parity then D7 of the TX/RX register becomes parity bit. Hence
what is called 9-bit or 8-bit Mode Select is a misnomer.
8 bit mode when parity is enabled is realy 7 bit with parity.
---
arch/arm/src/imxrt/imxrt_lowputc.c | 54 +++++++++++++++-----------------------
1 file changed, 21 insertions(+), 33 deletions(-)
diff --git a/arch/arm/src/imxrt/imxrt_lowputc.c b/arch/arm/src/imxrt/imxrt_lowputc.c
index ee826b8..682d1fe 100644
--- a/arch/arm/src/imxrt/imxrt_lowputc.c
+++ b/arch/arm/src/imxrt/imxrt_lowputc.c
@@ -1,35 +1,20 @@
/****************************************************************************
* arch/arm/src/imxrt/imxrt_lowputc.c
*
- * Copyright (C) 2018, 2019 Gregory Nutt. All rights reserved.
- * Author: Ivan Ucherdzhiev <iv...@gmail.com>
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership. The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at
*
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
+ * http://www.apache.org/licenses/LICENSE-2.0
*
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * 3. Neither the name NuttX nor the names of its contributors may be
- * used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
- * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
*
****************************************************************************/
@@ -544,13 +529,13 @@ int imxrt_lpuart_configure(uint32_t base,
regval |= LPUART_CTRL_PE | LPUART_CTRL_PT_EVEN;
}
- if (config->bits == 8)
+ if (config->bits == 9 || (config->bits == 8 && config->parity != 0))
{
- regval &= ~LPUART_CTRL_M;
+ regval |= LPUART_CTRL_M;
}
- else if (config->bits == 9)
+ else if ((config->bits == 8))
{
- regval |= LPUART_CTRL_M;
+ regval &= ~LPUART_CTRL_M;
}
else
{
@@ -590,13 +575,16 @@ void imxrt_lowputc(int ch)
{
}
- /* If the character to output is a newline, then pre-pend a carriage return */
+ /* If the character to output is a newline, then pre-pend a carriage
+ * return
+ */
if (ch == '\n')
{
/* Send the carriage return by writing it into the UART_TXD register. */
- putreg32((uint32_t)'\r', IMXRT_CONSOLE_BASE + IMXRT_LPUART_DATA_OFFSET);
+ putreg32((uint32_t)'\r', IMXRT_CONSOLE_BASE +
+ IMXRT_LPUART_DATA_OFFSET);
/* Wait for the transmit register to be emptied. When the TXFE bit is
* non-zero, the TX Buffer FIFO is empty.