nuttx/configs/sam4s-xplained/include/board.h

/************************************************************************************
 * configs/sam4s-xplained/include/board.h
 *
 *   Copyright (C) 2013 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 __CONFIGS_SAM4L_XPLAINED_INCLUDE_BOARD_H
#define __CONFIGS_SAM4L_XPLAINED_INCLUDE_BOARD_H

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

#include <nuttx/config.h>

#ifndef __ASSEMBLY__
#  include <stdint.h>
#  ifdef CONFIG_GPIO_IRQ
#    include <arch/irq.h>
#  endif
#endif

/************************************************************************************
 * Definitions
 ************************************************************************************/

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

#include <nuttx/config.h>

#ifndef __ASSEMBLY__
#  include <stdint.h>
#  ifdef CONFIG_GPIO_IRQ
#    include <arch/irq.h>
#  endif
#endif

/************************************************************************************
 * Definitions
 ************************************************************************************/

/* Clocking *************************************************************************/
/* After power-on reset, the sam3u device is running on a 4MHz internal RC.  These
 * definitions will configure clocking with MCK = 48MHz, PLLA = 96, and CPU=120MHz.
 */

/* Main oscillator register settings */

#define BOARD_CKGR_MOR_MOSCXTST    (63 << PMC_CKGR_MOR_MOSCXTST_SHIFT) /* Start-up Time */

/* PLLA configuration:
 *
 * Source: 12MHz crystall at 12MHz
 * PLLdiv: 10
 * PLLmul: 1 (bypassed)
 * Fpll:   (12MHz * 10) / 1 = 120MHz
 */

#define BOARD_MAINOSC_FREQUENCY    (12000000)
#define BOARD_CKGR_PLLAR_MUL       (9 << PMC_CKGR_PLLAR_MUL_SHIFT)
#define BOARD_CKGR_PLLAR_DIV       PMC_CKGR_PLLAR_DIV_BYPASS
#define BOARD_CKGR_PLLAR_COUNT     (63 << PMC_CKGR_PLLAR_COUNT_SHIFT)
#define BOARD_PLLA_FREQUENCY       (10*BOARD_MAINOSC_FREQUENCY)

/* PMC master clock register settings */

#define BOARD_PMC_MCKR_CSS         PMC_MCKR_CSS_PLLA
#define BOARD_PMC_MCKR_PRES        PMC_MCKR_PRES_DIV1
#define BOARD_MCK_FREQUENCY        (BOARD_PLLA_FREQUENCY/1)
#define BOARD_CPU_FREQUENCY        (BOARD_PLLA_FREQUENCY/1)

/* USB UTMI PLL start-up time */

#define BOARD_CKGR_UCKR_UPLLCOUNT  (3 << PMC_CKGR_UCKR_UPLLCOUNT_SHIFT)

/* HSMCI clocking
 *
 * Multimedia Card Interface clock (MCCK or MCI_CK) is Master Clock (MCK)
 * divided by (2*(CLKDIV+1)).
 *
 *   MCI_SPEED = MCK / (2*(CLKDIV+1))
 *   CLKDIV = MCI / MCI_SPEED / 2 - 1
 */

/* MCK = 48MHz, CLKDIV = 59, MCI_SPEED = 48MHz / 2 * (59+1) = 400 KHz */

#define HSMCI_INIT_CLKDIV      (59 << HSMCI_MR_CLKDIV_SHIFT)

/* MCK = 48MHz, CLKDIV = 1, MCI_SPEED = 48MHz / 2 * (1+1) = 12 MHz */

#define HSMCI_MMCXFR_CLKDIV    (3 << HSMCI_MR_CLKDIV_SHIFT)

/* MCK = 48MHz, CLKDIV = 0, MCI_SPEED = 48MHz / 2 * (0+1) = 24 MHz */

#define HSMCI_SDXFR_CLKDIV     (0 << HSMCI_MR_CLKDIV_SHIFT)
#define HSMCI_SDWIDEXFR_CLKDIV HSMCI_SDXFR_CLKDIV

/* LED definitions ******************************************************************/
/* There are four LEDs on board the SAM4S Xplained board, two of these can be
 * controlled by software in the SAM4S:
 *
 *   LED              GPIO
 *   ---------------- -----
 *   D9  Yellow LED   PC10
 *   D10 Yellow LED   PC17
 *
 * Both can be illuminated by driving the GPIO output to ground (low).
 */

/* LED index values for use with sam_setled() */

#define BOARD_D9          0
#define BOARD_D10         1
#define BOARD_NLEDS       2

/* LED bits for use with sam_setleds() */

#define BOARD_D9_BIT     (1 << BOARD_D9)
#define BOARD_D10_BIT    (1 << BOARD_D10)

/* These LEDs are not used by the board port unless CONFIG_ARCH_LEDS is
 * defined.  In that case, the usage by the board port is defined in
 * include/board.h and src/up_leds.c. The LEDs are used to encode OS-related
 * events as follows:
 *
 *   SYMBOL                Val  Meaning                      LED state
 *                                                          D9       D10
 * ----------------------- ---  -----------------------  -------- --------    */
#define LED_STARTED          0 /* NuttX has been started    OFF      OFF      */
#define LED_HEAPALLOCATE     0 /* Heap has been allocated   OFF      OFF      */
#define LED_IRQSENABLED      0 /* Interrupts enabled        OFF      OFF      */
#define LED_STACKCREATED     0 /* Idle stack created        ON       OFF      */
#define LED_INIRQ            0 /* In an interrupt             No change       */
#define LED_SIGNAL           0 /* In a signal handler         No change       */
#define LED_ASSERTION        0 /* An assertion failed         No change       */
#define LED_PANIC            0 /* The system has crashed    OFF      Blinking */
#define LED_IDLE             0 /* MCU is is sleep mode        Not used        */

/* Thus if D9 is statically on, NuttX has successfully booted and is,
 * apparently, running normmally.  If D10 is flashing at approximately
 * 2Hz, then a fatal error has been detected and the system has halted.
 */

/* Button definitions ***************************************************************/
/* Mechanical buttons:
 *
 * The SAM4S Xplained has two mechanical buttons. One button is the RESET button
 * connected to the SAM4S reset line and the other is a generic user configurable
 * button labeled BP2. When a button is pressed it will drive the I/O line to GND.
 *
 *   PA5 BP2
 */

#define BUTTON_BP2         0
#define NUM_BUTTONS        1

#define BUTTON_BP2_BIT     (1 << BUTTON_BP2)

/************************************************************************************
 * Public Data
 ************************************************************************************/

#ifndef __ASSEMBLY__

#undef EXTERN
#if defined(__cplusplus)
#define EXTERN extern "C"
extern "C" {
#else
#define EXTERN extern
#endif

/************************************************************************************
 * Public Function Prototypes
 ************************************************************************************/
/************************************************************************************
 * Name: sam_boardinitialize
 *
 * Description:
 *   All SAM3U architectures must provide the following entry point.  This entry point
 *   is called early in the intitialization -- after all memory has been configured
 *   and mapped but before any devices have been initialized.
 *
 ************************************************************************************/

void sam_boardinitialize(void);

/************************************************************************************
 * Name:  sam_ledinit, sam_setled, and sam_setleds
 *
 * Description:
 *   If CONFIG_ARCH_LEDS is defined, then NuttX will control the on-board LEDs.  If
 *   CONFIG_ARCH_LEDS is not defined, then the following interfaces are available to
 *   control the LEDs from user applications.
 *
 ************************************************************************************/

#ifndef CONFIG_ARCH_LEDS
void sam_ledinit(void);
void sam_setled(int led, bool ledon);
void sam_setleds(uint8_t ledset);
#endif

/************************************************************************************
 * Name: up_buttoninit
 *
 * Description:
 *   up_buttoninit() must be called to initialize button resources.  After that,
 *   up_buttons() may be called to collect the current state of all buttons or
 *   up_irqbutton() may be called to register button interrupt handlers.
 *
 ************************************************************************************/

#ifdef CONFIG_ARCH_BUTTONS
void up_buttoninit(void);

/************************************************************************************
 * Name: up_buttons
 *
 * Description:
 *   After up_buttoninit() has been called, up_buttons() may be called to collect
 *   the state of all buttons.  up_buttons() returns an 8-bit bit set with each bit
 *   associated with a button.  See the BUTTON* definitions above for the meaning of
 *   each bit in the returned value.
 *
 ************************************************************************************/

uint8_t up_buttons(void);

/************************************************************************************
 * Name: up_irqbutton
 *
 * Description:
 *   This function may be called to register an interrupt handler that will be
 *   called when a button is depressed or released.  The ID value is one of the
 *   BUTTON* definitions provided above. The previous interrupt handler address is
 *   returned (so that it may restored, if so desired).
 *
 ************************************************************************************/

#ifdef CONFIG_GPIOA_IRQ
xcpt_t up_irqbutton(int id, xcpt_t irqhandler);
#endif
#endif /* CONFIG_ARCH_BUTTONS */

#undef EXTERN
#if defined(__cplusplus)
}
#endif

#endif /* __ASSEMBLY__ */
#endif  /* __CONFIGS_SAM4L_XPLAINED_INCLUDE_BOARD_H */