nuttx/configs/sam4l-xplained/include/board.h

/************************************************************************************
 * configs/sam4l-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
 ************************************************************************************/

/* 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=48MHz.
 */

/* Main oscillator register settings */

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

/* PLLA configuration */

#define BOARD_CKGR_PLLAR_MULA      (7 << CKGR_PLLAR_MULA_SHIFT)
#define BOARD_CKGR_PLLAR_STMODE    CKGR_PLLAR_STMODE_FAST
#define BOARD_CKGR_PLLAR_PLLACOUNT (63 << CKGR_PLLAR_PLLACOUNT_SHIFT)
#define BOARD_CKGR_PLLAR_DIVA      CKGR_PLLAR_DIVA_BYPASS

/* PMC master clock register settings */

#define BOARD_PMC_MCKR_CSS         PMC_MCKR_CSS_PLLA
#define BOARD_PMC_MCKR_PRES        PMC_MCKR_PRES_DIV2

/* USB UTMI PLL start-up time */

#define BOARD_CKGR_UCKR_UPLLCOUNT (3 << CKGR_UCKR_UPLLCOUNT_SHIFT)

/* Resulting frequencies */

#define SAM_MAINOSC_FREQUENCY      (12000000)
#define SAM_MCK_FREQUENCY          (48000000)
#define SAM_PLLA_FREQUENCY         (96000000)
#define SAM_CPU_FREQUENCY          (48000000)

/* 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 three LEDs on board the SAM4L Xplained Pro board:  The EDBG
 * controls two of the LEDs, a power LED and a status LED.  There is only
 * one user controllable LED, a yellow LED labeled LED0 near the SAM4L USB
 * connector.
 *
 * This LED is controlled by PC07 and LED0 can be activated by driving the
 * PC07 to GND.
 *
 * When CONFIG_ARCH_LEDS is defined in the NuttX configuration, NuttX will
 * control LED0 as defined below.  Thus is LED0 is statically on, NuttX has
 * successfully booted and is, apparently, running normmally.  If LED0 is
 * flashing at approximately 2Hz, then a fatal error has been detected and the
 * system has halted.
 */

#define LED_STARTED       0 /* LED0=OFF */
#define LED_HEAPALLOCATE  0 /* LED0=OFF */
#define LED_IRQSENABLED   0 /* LED0=OFF */
#define LED_STACKCREATED  1 /* LED0=ON */
#define LED_INIRQ         2 /* LED0=no change */
#define LED_SIGNAL        2 /* LED0=no change */
#define LED_ASSERTION     2 /* LED0=no change */
#define LED_PANIC         3 /* LED0=flashing */

/* Button definitions ***************************************************************/
/* QTouch button: The SAM4L Xplained Pro kit has one QTouch button.  The connection
 * to the SAM4L is:
 *
 *   PC13 CATB_SENSE15
 *   PC14 CATB_DIS
 */

/* Mechanical buttons:
 *
 * The SAM4L Xplained Pro contains two mechanical buttons. One button is the
 * RESET button connected to the SAM4L reset line and the other is a generic user
 * configurable button. When a button is pressed it will drive the I/O line to GND.
 *
 *   PC24 SW0
 */

/* The STM32F4 Discovery supports one button: */

#define BUTTON_SW0         0
#define NUM_BUTTONS        1

#define BUTTON_SW0_BIT     (1 << BUTTON_SW0)

/************************************************************************************
 * 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: 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 */