text: /****************************************************************************
   * boards/arm/str71x/olimex-strp711/src/str71_buttons.c
   *
   *   Copyright (C) 2008-2009, 2015 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.
   *
   ****************************************************************************/
  
  /****************************************************************************
   * Included Files
   ****************************************************************************/
  
  #include <nuttx/config.h>
  #include <stdint.h>
  
  #include <nuttx/board.h>
  #include <arch/board/board.h>
  
  #include "chip.h"
  #include "arm_arch.h"
  #include "arm_internal.h"
  
  /****************************************************************************
   * Pre-processor Definitions
   ****************************************************************************/
  
  /* The Olimex board has two buttons, one labeled "BUT" and the other "WAKEUP"
   *
   * P0.15: WAKEUP button
   * P1.13: BUT button
   */
  
  #define STR71X_BUTBUTTON_GPIO1    (0x2000)
  #define STR71X_WAKEUPBUTTON_GPIO0 (0x8000)
  
  /****************************************************************************
   * Private Data
   ****************************************************************************/
  
  /****************************************************************************
   * Private Functions
   ****************************************************************************/
  
  /****************************************************************************
   * Public Functions
   ****************************************************************************/
  
  /****************************************************************************
   * Name: board_button_initialize
   ****************************************************************************/
  
  #ifdef CONFIG_ARCH_BUTTONS
  void board_button_initialize(void)
  {
    uint16_t reg16;
  
    /* Configure the GPIO0 & 1 pins as inputs */
  
    reg16  = getreg16(STR71X_GPIO0_PC0);
    reg16 |= STR71X_WAKEUPBUTTON_GPIO0;
    putreg16(reg16, STR71X_GPIO0_PC0);
  
    reg16  = getreg16(STR71X_GPIO0_PC1);
    reg16 &= ~STR71X_WAKEUPBUTTON_GPIO0;
    putreg16(reg16, STR71X_GPIO0_PC1);
  
    reg16  = getreg16(STR71X_GPIO0_PC2);
    reg16 &= ~STR71X_WAKEUPBUTTON_GPIO0;
    putreg16(reg16, STR71X_GPIO0_PC2);
  
    reg16  = getreg16(STR71X_GPIO1_PC0);
    reg16 |= STR71X_BUTBUTTON_GPIO1;
    putreg16(reg16, STR71X_GPIO1_PC0);
  
    reg16  = getreg16(STR71X_GPIO1_PC1);
    reg16 &= ~STR71X_BUTBUTTON_GPIO1;
    putreg16(reg16, STR71X_GPIO1_PC1);
  
    reg16  = getreg16(STR71X_GPIO1_PC2);
    reg16 &= ~STR71X_BUTBUTTON_GPIO1;
    putreg16(reg16, STR71X_GPIO1_PC2);
  }
  
  /****************************************************************************
   * Name: board_buttons
   ****************************************************************************/
  
  uint32_t board_buttons(void)
  {
    uint32_t ret = 0;
  
    if ((getreg16(STR71X_GPIO0_PD) & STR71X_WAKEUPBUTTON_GPIO0) != 0)
      {
        ret |= WAKEUP_BUTTON;
      }
  
    if ((getreg16(STR71X_GPIO1_PD) & STR71X_BUTBUTTON_GPIO1) != 0)
      {
        ret |= BUT_BUTTON;
      }
  
    return ret;
  }
  #endif /* CONFIG_ARCH_BUTTONS */
  