text: /****************************************************************************
   * boards/arm/tiva/ekk-lm3s9b96/include/board.h
   * include/arch/board/board.h
   *
   *   Copyright (C) 2012 Gregory Nutt. All rights reserved.
   *   Authors: Gregory Nutt <gnutt@nuttx.org>
   *            Jose Pablo Rojas V. <jrojas@nx-engineering.com>
   *
   * 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 __BOARDS_ARM_TIVA_EKK_LM3S9B96_INCLUDE_BOARD_H
  #define __BOARDS_ARM_TIVA_EKK_LM3S9B96_INCLUDE_BOARD_H
  
  /****************************************************************************
   * Included Files
   ****************************************************************************/
  
  /****************************************************************************
   * Pre-processor Definitions
   ****************************************************************************/
  
  /* Clocking *****************************************************************/
  
  /* RCC settings */
  
  #define SYSCON_RCC_XTAL      SYSCON_RCC_XTAL16000KHZ /* 16.000 MHz crystal */
  #define XTAL_FREQUENCY       16000000
  
  /* Oscillator source is the main oscillator (not internal, internal/4,
   * 30KHz or 30KHz from hibernate module)
   */
  
  #define SYSCON_RCC_OSCSRC    SYSCON_RCC_OSCSRC_MOSC
  #define SYSCON_RCC2_OSCSRC   SYSCON_RCC2_OSCSRC2_MOSC
  #define OSCSRC_FREQUENCY     XTAL_FREQUENCY
  
  /* Use system divider = 4; this corresponds to a system clock frequency
   * of (400 / 2) / 4 = 50MHz
   */
  
  #define TIVA_SYSDIV          4
  #define SYSCLK_FREQUENCY     50000000  /* 50MHz */
  
  /* Peripheral Clock (PCLK)
   *
   * Same frequency as the SYSCLK
   */
  
  #define PCLK_FREQUENCY       SYSCLK_FREQUENCY
  
  /* Other RCC settings:
   *
   * - Main and internal oscillators enabled.
   * - PLL and sys dividers not bypassed
   * - PLL not powered down
   * - No auto-clock gating reset
   */
  
  #define TIVA_RCC_VALUE (SYSCON_RCC_OSCSRC | SYSCON_RCC_XTAL | SYSCON_RCC_USESYSDIV | SYSCON_RCC_SYSDIV(TIVA_SYSDIV))
  
  /* RCC2 settings -- RCC2 not used.  Other RCC2 settings
   *
   * - PLL and sys dividers not bypassed.
   * - PLL not powered down
   * - Not using RCC2
   */
  
  #define TIVA_RCC2_VALUE (SYSCON_RCC2_OSCSRC | SYSCON_RCC2_SYSDIV(TIVA_SYSDIV))
  
  /* LED definitions **********************************************************/
  
  /* The EKK-LMS39B96 Eval Kit has only one user LED: Port D, Bit 0.
   * Below is the mapping of this single LED.
   * From this single LED, we can get the following information:
   *
   *   OFF Steady:    The system has failed to boot to the point of
   *                  enabling interrupts
   *   ON Steady:     The systems has enabled interrupts,
   *                  but none have been received
   *   Dull glow:     The system is taking interrupts
   *   Slow blinking: The system has panicked
   *                                 ON   OFF
   */
  
  #define LED_STARTED       0     /* OFF  OFF */
  #define LED_HEAPALLOCATE  1     /* OFF  OFF */
  #define LED_IRQSENABLED   2     /* ON   ON */
  #define LED_STACKCREATED  3     /* ON   ON */
  #define LED_INIRQ         4     /* ON   OFF */
  #define LED_SIGNAL        5     /* ON   OFF */
  #define LED_ASSERTION     6     /* ON   OFF */
  #define LED_PANIC         7     /* ON   OFF */
  
  #endif  /* __BOARDS_ARM_TIVA_EKK_LM3S9B96_INCLUDE_BOARD_H */
  