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

/****************************************************************************
 * boards/arm/tiva/lm3s6432-s2e/include/board.h
 *
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.  The
 * ASF licenses this file to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance with the
 * License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
 * License for the specific language governing permissions and limitations
 * under the License.
 *
 ****************************************************************************/

#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 */