text: /****************************************************************************
   * arch/arm/src/s32k1xx/s32k1xx_lowputc.h
   *
   * 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
   *
   *   http://www.apache.org/licenses/LICENSE-2.0
   *
   * 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.
   *
   ****************************************************************************/
  
  #ifndef __ARCH_ARM_SRC_S32K1XX_S32K1XX_LOWPUTC_H
  #define __ARCH_ARM_SRC_S32K1XX_S32K1XX_LOWPUTC_H
  
  /****************************************************************************
   * Included Files
   ****************************************************************************/
  
  #include <nuttx/config.h>
  #include <nuttx/compiler.h>
  
  #include <sys/types.h>
  #include <stdint.h>
  #include <stdbool.h>
  
  #include "arm_internal.h"
  #include "s32k1xx_config.h"
  
  /****************************************************************************
   * Public Types
   ****************************************************************************/
  
  #ifdef HAVE_LPUART_DEVICE
  /* This structure describes the configuration of an UART */
  
  struct uart_config_s
  {
    uint32_t baud;          /* Configured baud */
    uint8_t  parity;        /* 0=none, 1=odd, 2=even */
    uint8_t  bits;          /* Number of bits (5-9) */
    bool     stopbits2;     /* true: Configure with 2 stop bits instead of 1 */
    bool     userts;        /* True: Assert RTS when there are data to be sent */
    bool     invrts;        /* True: Invert sense of RTS pin (true=active high) */
    bool     usects;        /* True: Condition transmission on CTS asserted */
    bool     users485;      /* True: Assert RTS while transmission progresses */
  };
  #endif
  
  /****************************************************************************
   * Public Function Prototypes
   ****************************************************************************/
  
  /****************************************************************************
   * Name: s32k1xx_lowsetup
   *
   * Description:
   *   Called at the very beginning of _start.  Performs low level
   *   initialization including setup of the console UART.  This UART done
   *   early so that the serial console is available for debugging very early
   *   in the boot sequence.
   *
   ****************************************************************************/
  
  void s32k1xx_lowsetup(void);
  
  /****************************************************************************
   * Name: s32k1xx_lpuart_configure
   *
   * Description:
   *   Configure a UART for non-interrupt driven operation
   *
   ****************************************************************************/
  
  #ifdef HAVE_LPUART_DEVICE
  int s32k1xx_lpuart_configure(uint32_t base,
                               FAR const struct uart_config_s *config);
  #endif
  
  /****************************************************************************
   * Name: s32k1xx_lowputc
   *
   * Description:
   *   Output a byte with as few system dependencies as possible.  This will
   *   even work BEFORE the console is initialized if we are booting from U-
   *   Boot (and the same UART is used for the console, of course.)
   *
   ****************************************************************************/
  
  #if defined(HAVE_LPUART_DEVICE) && defined(CONFIG_DEBUG_FEATURES)
  void s32k1xx_lowputc(int ch);
  #else
  #  define s32k1xx_lowputc(ch)
  #endif
  
  #endif /* __ARCH_ARM_SRC_S32K1XX_S32K1XX_LOWPUTC_H */
  