text: /************************************************************************************
   * arch/arm/src/lpc17xx/lpc17_gpio.h
   *
   *   Copyright (C) 2010, 2013 Gregory Nutt. All rights reserved.
   *   Author: Gregory Nutt <gnutt@nuttx.org>
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 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.
   *
   ************************************************************************************/
  
  #ifndef __ARCH_ARM_SRC_LPC17XX_LPC17_GPIO_H
  #define __ARCH_ARM_SRC_LPC17XX_LPC17_GPIO_H
  
  /************************************************************************************
   * Included Files
   ************************************************************************************/
  
  #include <nuttx/config.h>
  
  #ifndef __ASSEMBLY__
  #  include <stdint.h>
  #  include <stdbool.h>
  #endif
  
  #include <arch/lpc17xx/chip.h>
  
  #include "hardware/lpc17_gpio.h"
  #include "hardware/lpc17_pinconn.h"
  #include "hardware/lpc17_pinconfig.h"
  
  /* Include the GPIO definitions for the selected LPC17xx family. */
  
  #if defined(LPC176x)
  #  include "lpc176x_gpio.h"
  #elif defined(LPC178x)
  #  include "lpc178x_gpio.h"
  #else
  #  error "Unrecognized LPC17xx family"
  #endif
  
  /************************************************************************************
   * Pre-processor Definitions
   ************************************************************************************/
  
  /************************************************************************************
   * Public Types
   ************************************************************************************/
  
  /************************************************************************************
   * Public Data
   ************************************************************************************/
  
  #ifndef __ASSEMBLY__
  #undef EXTERN
  #if defined(__cplusplus)
  #define EXTERN extern "C"
  extern "C"
  {
  #else
  #define EXTERN extern
  #endif
  
  /* These tables have global scope only because they are shared between lpc17_gpio.c,
   * lpc17_gpioint.c, and lpc17_gpiodbg.c
   */
  
  #ifdef CONFIG_LPC17_GPIOIRQ
  EXTERN uint64_t g_intedge0;
  EXTERN uint64_t g_intedge2;
  #endif
  
  EXTERN const uint32_t g_fiobase[GPIO_NPORTS];
  EXTERN const uint32_t g_intbase[GPIO_NPORTS];
  
  /****************************************************************************
   * Public Functions
   ****************************************************************************/
  
  /************************************************************************************
   * Name: lpc17_gpioirqinitialize
   *
   * Description:
   *   Initialize logic to support a second level of interrupt decoding for GPIO pins.
   *
   ************************************************************************************/
  
  #ifdef CONFIG_LPC17_GPIOIRQ
  void lpc17_gpioirqinitialize(void);
  #else
  #  define lpc17_gpioirqinitialize()
  #endif
  
  /************************************************************************************
   * Name: lpc17_configgpio
   *
   * Description:
   *   Configure a GPIO pin based on bit-encoded description of the pin.
   *
   ************************************************************************************/
  
  int lpc17_configgpio(lpc17_pinset_t cfgset);
  
  /************************************************************************************
   * Name: lpc17_gpiowrite
   *
   * Description:
   *   Write one or zero to the selected GPIO pin
   *
   ************************************************************************************/
  
  void lpc17_gpiowrite(lpc17_pinset_t pinset, bool value);
  
  /************************************************************************************
   * Name: lpc17_gpioread
   *
   * Description:
   *   Read one or zero from the selected GPIO pin
   *
   ************************************************************************************/
  
  bool lpc17_gpioread(lpc17_pinset_t pinset);
  
  /************************************************************************************
   * Name: lpc17_gpioirqenable
   *
   * Description:
   *   Enable the interrupt for specified GPIO IRQ
   *
   ************************************************************************************/
  
  #ifdef CONFIG_LPC17_GPIOIRQ
  void lpc17_gpioirqenable(int irq);
  #else
  #  define lpc17_gpioirqenable(irq)
  #endif
  
  /************************************************************************************
   * Name: lpc17_gpioirqdisable
   *
   * Description:
   *   Disable the interrupt for specified GPIO IRQ
   *
   ************************************************************************************/
  
  #ifdef CONFIG_LPC17_GPIOIRQ
  void lpc17_gpioirqdisable(int irq);
  #else
  #  define lpc17_gpioirqdisable(irq)
  #endif
  
  /************************************************************************************
   * Function:  lpc17_dumpgpio
   *
   * Description:
   *   Dump all GPIO registers associated with the base address of the provided pinset.
   *
   ************************************************************************************/
  
  #ifdef CONFIG_DEBUG_GPIO_INFO
  int lpc17_dumpgpio(lpc17_pinset_t pinset, const char *msg);
  #else
  #  define lpc17_dumpgpio(p,m)
  #endif
  
  #ifdef __cplusplus
  }
  #endif
  #endif /* __ASSEMBLY__ */
  
  #endif /* __ARCH_ARM_SRC_LPC17XX_LPC17_GPIO_H */
  