nuttx/boards/arm/tiva/lm3s6432-s2e/include/board.h

/****************************************************************************
 * boards/arm/tiva/lm3s6432-s2e/include/board.h
 * include/arch/board/board.h
 *
 *   Copyright (C) 2010 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 __BOARDS_ARM_TIVA_LM3S6432_S2E_INCLUDE_BOARD_H
#define __BOARDS_ARM_TIVA_LM3S6432_S2E_INCLUDE_BOARD_H

/****************************************************************************
 * Included Files
 ****************************************************************************/

/****************************************************************************
 * Pre-processor Definitions
 ****************************************************************************/

/* Clocking *****************************************************************/

/* RCC settings */

#define SYSCON_RCC_XTAL      SYSCON_RCC_XTAL8000KHZ /* S2E on-board crystal is 8.00 MHz */
#define XTAL_FREQUENCY       8000000

/* 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 S2E has two LEDs on PF2/PF3, shared with the Ethernet.
 * In keeping with the other lm3s6xxx port, we use one of these for
 * debugging.
 * 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_LM3S6432_S2E_INCLUDE_BOARD_H */