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nuttx/configs/sam3u-ek/include/board.h

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/************************************************************************************
* configs/sam3u-ek/include/board.h
*
* Copyright (C) 2009-2011, 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 __ARCH_SAM3U_EK_INCLUDE_BOARD_H
#define __ARCH_SAM3U_EK_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
*
* MAINOSC: Frequency = 12MHz (crysta)
* PLLA: PLL Divider = 1, Multiplier = 16 to generate PLLACK = 192MHz
* Master Clock (MCK): Source = PLLACK, Prescalar = 1 to generate MCK = 96MHz
* CPU clock: 96MHz
*/
/* Main oscillator register settings.
*
* The start up time should be should be:
* Start Up Time = 8 * MOSCXTST / SLCK = 56 Slow Clock Cycles.
*/
#define BOARD_CKGR_MOR_MOSCXTST (62 << PMC_CKGR_MOR_MOSCXTST_SHIFT) /* Start-up Time */
/* PLLA configuration.
*
* Divider = 1
* Multipler = 16
*/
#define BOARD_CKGR_PLLAR_MUL (15 << PMC_CKGR_PLLAR_MUL_SHIFT)
#define BOARD_CKGR_PLLAR_STMODE PMC_CKGR_PLLAR_STMODE_FAST
#define BOARD_CKGR_PLLAR_COUNT (63 << PMC_CKGR_PLLAR_COUNT_SHIFT)
#define BOARD_CKGR_PLLAR_DIV PMC_CKGR_PLLAR_DIV_BYPASS
/* PMC master clock register settings.
*
* Source = PLLA
* Divider = 2
*/
#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 << PMC_CKGR_UCKR_UPLLCOUNT_SHIFT)
/* Resulting frequencies */
#define BOARD_MAINOSC_FREQUENCY (12000000) /* MAINOSC: 12MHz crystal on-board */
#define BOARD_PLLA_FREQUENCY (192000000) /* PLLACK: 16 * 12Mhz / 1 */
#define BOARD_MCK_FREQUENCY (96000000) /* MCK: PLLACK / 2 */
#define BOARD_CPU_FREQUENCY (96000000) /* CPU: MCK */
/* 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
*
* Where CLKDIV has a range of 0-255.
*/
/* MCK = 96MHz, CLKDIV = 119, MCI_SPEED = 96MHz / 2 * (119+1) = 400 KHz */
#define HSMCI_INIT_CLKDIV (119 << HSMCI_MR_CLKDIV_SHIFT)
/* MCK = 96MHz, CLKDIV = 3, MCI_SPEED = 96MHz / 2 * (3+1) = 12 MHz */
#define HSMCI_MMCXFR_CLKDIV (3 << HSMCI_MR_CLKDIV_SHIFT)
/* MCK = 96MHz, CLKDIV = 1, MCI_SPEED = 96MHz / 2 * (1+1) = 24 MHz */
#define HSMCI_SDXFR_CLKDIV (1 << HSMCI_MR_CLKDIV_SHIFT)
#define HSMCI_SDWIDEXFR_CLKDIV HSMCI_SDXFR_CLKDIV
/* FLASH wait states
*
* FWS Max frequency
* 1.62V 1.8V
* --- ----- ------
* 0 24MHz 27MHz
* 1 40MHz 47MHz
* 2 72MHz 84MHz
* 3 84MHz 96MHz
*/
#define BOARD_FWS 3
/* LED definitions ******************************************************************/
#define LED_STARTED 0 /* LED0=OFF LED1=OFF LED2=OFF */
#define LED_HEAPALLOCATE 1 /* LED0=OFF LED1=OFF LED2=ON */
#define LED_IRQSENABLED 2 /* LED0=OFF LED1=ON LED2=OFF */
#define LED_STACKCREATED 3 /* LED0=OFF LED1=ON LED2=ON */
#define LED_INIRQ 4 /* LED0=XXX LED1=TOG LED2=XXX */
#define LED_SIGNAL 5 /* LED0=XXX LED1=XXX LED2=TOG */
#define LED_ASSERTION 6 /* LED0=TOG LED1=XXX LED2=XXX */
#define LED_PANIC 7 /* LED0=TOG LED1=XXX LED2=XXX */
/* Button definitions ***************************************************************/
#define BUTTON1 1 /* Bit 0: Button 1 */
#define BUTTON2 2 /* Bit 1: Button 2 */
/************************************************************************************
* 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 /* __ARCH_SAM3U_EK_INCLUDE_BOARD_H */
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