text: /**
   * \file
   *
   * \brief SSD1306 display controller driver configuration file.
   *
   * Copyright (c) 2014-2015 Atmel Corporation. All rights reserved.
   *
   * \asf_license_start
   *
   * \page License
   *
   * 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. The name of Atmel may not be used to endorse or promote products derived
   *    from this software without specific prior written permission.
   *
   * 4. This software may only be redistributed and used in connection with an
   *    Atmel microcontroller product.
   *
   * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
   * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
   * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL 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.
   *
   * \asf_license_stop
   *
   */
  #ifndef CONF_SSD1306_H_INCLUDED
  #define CONF_SSD1306_H_INCLUDED
  
  #include <board.h>
  #include <conf_demo.h>
  
  // Interface configuration for SAM D20 Xplained Pro
  #define CONFIG_SSD1306_FRAMEBUFFER
  
  #define SSD1306_SPI      ATPASTE2(OLED1_EXT_HEADER, _SPI_MODULE)
  
  #define SSD1306_DC_PIN   ATPASTE2(OLED1_EXT_HEADER, _PIN_5)
  #define SSD1306_RES_PIN  ATPASTE2(OLED1_EXT_HEADER, _PIN_10)
  #define SSD1306_CS_PIN   ATPASTE2(OLED1_EXT_HEADER, _PIN_15)
  
  #define SSD1306_SPI_PINMUX_SETTING  \
  		ATPASTE2(OLED1_EXT_HEADER, _SPI_SERCOM_MUX_SETTING)
  
  #define SSD1306_SPI_PINMUX_PAD0  \
  		ATPASTE2(OLED1_EXT_HEADER, _SPI_SERCOM_PINMUX_PAD0)
  
  #define SSD1306_SPI_PINMUX_PAD1  \
  		PINMUX_UNUSED
  
  #define SSD1306_SPI_PINMUX_PAD2  \
  		ATPASTE2(OLED1_EXT_HEADER, _SPI_SERCOM_PINMUX_PAD2)
  
  #define SSD1306_SPI_PINMUX_PAD3  \
  		ATPASTE2(OLED1_EXT_HEADER, _SPI_SERCOM_PINMUX_PAD3)
  
  // Minimum clock period is 50ns@3.3V -> max frequency is 20MHz
  #define SSD1306_CLOCK_SPEED           20000000UL
  #define SSD1306_DISPLAY_CONTRAST_MAX  40
  #define SSD1306_DISPLAY_CONTRAST_MIN  30
  
  #endif /* CONF_SSD1306_H_INCLUDED */
  