nuttx/boards/arm/nuc1xx/nutiny-nuc120/include/board.h

/****************************************************************************
 * boards/arm/nuc1xx/nutiny-nuc120/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_NUC1XX_NUTINY_NUC120_INCLUDE_BOARD_H
#define __BOARDS_ARM_NUC1XX_NUTINY_NUC120_INCLUDE_BOARD_H

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

#include <nuttx/config.h>

#ifndef __ASSEMBLY__
# include <stdint.h>
#endif

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

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

/* Crystal frequencies */

#define BOARD_XTALHI_FREQUENCY 12000000
#define BOARD_XTALLO_FREQUENCY 32768

/* PLL: The PLL must be 48MHz x N times when using USB
 *
 * FOUT = FIN x (NF/NR) x (1 / NO)
 * FIN  = Input reference clock frequency
 * NF   = Feedback divider
 *      = (FB_DV + 2)
 * NR   = Input divider
 *      = (IN_DV + 2)
 * NO   = 1 if OUT_DV == 0
 *        2 if OUT_DV == 1 or 2
 *        4 if OUT_DV == 3
 *
 * FOUT = 12000000 x 48 / 3 / 4
 *      = 48MHz
 */

#define BOARD_PLL_FIN    BOARD_XTALHI_FREQUENCY
#define BOARD_PLL_FB_DV  46
#define BOARD_PLL_NF     (BOARD_PLL_FB_DV+2)
#define BOARD_PLL_IN_DV  1
#define BOARD_PLL_NR     (BOARD_PLL_IN_DV+2)
#define BOARD_PLL_OUT_DV 3
#define BOARD_PLL_NO     4

#define BOARD_PLL_FOUT \
  (BOARD_PLL_FIN * BOARD_PLL_NF / BOARD_PLL_NR / BOARD_PLL_NO)

/* HCLK. FOUT is the HCLK source clock. */

#define BOARD_HCLK_N     1
#define BOARD_HCLK_FREQUENCY (BOARD_PLL_FOUT / BOARD_HCLK_N)

/* USB. FOUT is the source.  The USB CLK must be 48MHz */

#define BOARD_USB_N     1
#define BOARD_USB_FREQUENCY (BOARD_PLL_FOUT / BOARD_USB_N)

/* LED definitions **********************************************************/

/* The NuTiny has a single green LED that can be controlled from software.
 * This LED is connected to PIN17.
 * It is pulled high so a low value will illuminate the LED.
 */

#define BOARD_NLEDS       1

/* If CONFIG_ARCH_LEDs is defined, then NuttX will control the LED on board
 * the NuTiny.
 * The following definitions describe how NuttX controls the LEDs:
 *
 *   SYMBOL                Meaning                 LED state
 *                                                 Initially all LED is OFF
 *   -------------------  -----------------------  ------------- ------------
 *   LED_STARTED          NuttX has been started   LED ON
 *   LED_HEAPALLOCATE     Heap has been allocated  LED ON
 *   LED_IRQSENABLED      Interrupts enabled       LED ON
 *   LED_STACKCREATED     Idle stack created       LED ON
 *   LED_INIRQ            In an interrupt          LED should glow
 *   LED_SIGNAL           In a signal handler      LED might glow
 *   LED_ASSERTION        An assertion failed      LED ON while handling the
 *                                                        assertion
 *   LED_PANIC            The system has crashed   LED Blinking at 2Hz
 *   LED_IDLE             NUC1XX is is sleep mode   (Optional, not used)
 */

#define LED_STARTED       0
#define LED_HEAPALLOCATE  0
#define LED_IRQSENABLED   0
#define LED_STACKCREATED  0
#define LED_INIRQ         0
#define LED_SIGNAL        0
#define LED_ASSERTION     0
#define LED_PANIC         0

/* Button definitions *******************************************************/

/* The NuTiny has no buttons */

#define NUM_BUTTONS        0

#endif /* __BOARDS_ARM_NUC1XX_NUTINY_NUC120_INCLUDE_BOARD_H */