250 lines
9.1 KiB
C
250 lines
9.1 KiB
C
/************************************************************************************
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* configs/arduino-due/include/board.h
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*
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* Copyright (C) 2013 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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************************************************************************************/
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#ifndef __CONFIGS_ARDUINO_DUE_INCLUDE_BOARD_H
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#define __CONFIGS_ARDUINO_DUE_INCLUDE_BOARD_H
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/************************************************************************************
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* Included Files
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************************************************************************************/
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#include <nuttx/config.h>
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#ifndef __ASSEMBLY__
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# include <stdint.h>
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# include <stdbool.h>
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# ifdef CONFIG_GPIO_IRQ
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# include <arch/irq.h>
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# endif
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#endif
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/************************************************************************************
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* Definitions
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************************************************************************************/
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/* Clocking *************************************************************************/
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/* After power-on reset, the SAM3X device is running on a 4MHz internal RC. These
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* definitions will configure clocking
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*
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* MAINOSC: Frequency = 12MHz (crysta)
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* PLLA: PLL Divider = 1, Multiplier = 14 to generate PLLACK = 168MHz
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* Master Clock (MCK): Source = PLLACK, Prescalar = 1 to generate MCK = 84MHz
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* CPU clock: 84MHz
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*/
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/* Main oscillator register settings.
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*
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* The start up time should be should be:
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* Start Up Time = 8 * MOSCXTST / SLCK = 56 Slow Clock Cycles.
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*/
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#define BOARD_CKGR_MOR_MOSCXTST (62 << PMC_CKGR_MOR_MOSCXTST_SHIFT) /* Start-up Time */
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/* PLLA configuration.
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*
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* Divider = 1
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* Multipler = 14
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*/
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#define BOARD_CKGR_PLLAR_MUL (13 << PMC_CKGR_PLLAR_MUL_SHIFT)
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#define BOARD_CKGR_PLLAR_COUNT (63 << PMC_CKGR_PLLAR_COUNT_SHIFT)
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#define BOARD_CKGR_PLLAR_DIV PMC_CKGR_PLLAR_DIV_BYPASS
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/* PMC master clock register settings.
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*
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* Source = PLLA
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* Divider = 2
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*/
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#define BOARD_PMC_MCKR_CSS PMC_MCKR_CSS_PLLA
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#define BOARD_PMC_MCKR_PRES PMC_MCKR_PRES_DIV2
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/* USB UTMI PLL start-up time */
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#define BOARD_CKGR_UCKR_UPLLCOUNT (3 << PMC_CKGR_UCKR_UPLLCOUNT_SHIFT)
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/* Resulting frequencies */
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#define BOARD_MAINOSC_FREQUENCY (12000000) /* MAINOSC: 12MHz crystal on-board */
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#define BOARD_PLLA_FREQUENCY (168000000) /* PLLACK: 14 * 12Mhz / 1 */
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#define BOARD_MCK_FREQUENCY (84000000) /* MCK: PLLACK / 2 */
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#define BOARD_CPU_FREQUENCY (84000000) /* CPU: MCK */
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/* HSMCI clocking
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*
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* Multimedia Card Interface clock (MCCK or MCI_CK) is Master Clock (MCK)
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* divided by (2*(CLKDIV+1)).
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*
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* MCI_SPEED = MCCK / (2*(CLKDIV+1))
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* CLKDIV = MCCK / MCI_SPEED / 2 - 1
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*
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* Where CLKDIV has a range of 0-255.
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*/
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/* MCK = 84MHz, CLKDIV = 104, MCI_SPEED = 84MHz / 2 * (104+1) = 400 KHz */
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#define HSMCI_INIT_CLKDIV (104 << HSMCI_MR_CLKDIV_SHIFT)
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/* MCK = 84MHz, CLKDIV = 2, MCI_SPEED = 84MHz / 2 * (2+1) = 14 MHz */
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#define HSMCI_MMCXFR_CLKDIV (1 << HSMCI_MR_CLKDIV_SHIFT)
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/* MCK = 84MHz, CLKDIV = 1, MCI_SPEED = 84MHz / 2 * (1+1) = 21 MHz */
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#define HSMCI_SDXFR_CLKDIV (1 << HSMCI_MR_CLKDIV_SHIFT)
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#define HSMCI_SDWIDEXFR_CLKDIV HSMCI_SDXFR_CLKDIV
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/* FLASH wait states
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*
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* FWS MAX FREQUENCY
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* 1.62V 1.8V
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* --- ----- ------
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* 0 17MHz 19MHz
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* 1 45MHz 50MHz
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* 2 58MHz 64MHz
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* 3 70MHz 80MHz
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* 4 78MHz 90MHz
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*/
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#define BOARD_FWS 4
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/* LED definitions ******************************************************************/
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/* There are three user-controllable LEDs on board the Arduino Due board:
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*
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* LED GPIO
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* ---------------- -----
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* L Amber LED PB27
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* TX Yellow LED PA21
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* RX Yellow LED PC30
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*
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* LED L is connected to ground and can be illuminated by driving the PB27
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* output high. The TX and RX LEDs are pulled high and can be illuminated by
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* driving the corresponding
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* GPIO output to low.
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*/
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/* LED index values for use with sam_setled() */
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#define BOARD_LED_L 0
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#define BOARD_LED_RX 1
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#define BOARD_LED_TX 2
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#define BOARD_NLEDS 3
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/* LED bits for use with sam_setleds() */
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#define BOARD_LED_L_BIT (1 << BOARD_LED_L)
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#define BOARD_LED_RX_BIT (1 << BOARD_LED_RX)
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#define BOARD_LED_TX_BIT (1 << BOARD_LED_TX)
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/* These LEDs are not used by the board port unless CONFIG_ARCH_LEDS is
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* defined. In that case, the usage by the board port is defined in
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* include/board.h and src/sam_leds.c. The LEDs are used to encode OS-related
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* events as follows:
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*
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* SYMBOL MEANING LED STATE
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* L TX RX
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* ----------------------- -------------------------- -------- -------- -------- */
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#define LED_STARTED 0 /* NuttX has been started OFF OFF OFF */
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#define LED_HEAPALLOCATE 0 /* Heap has been allocated OFF OFF OFF */
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#define LED_IRQSENABLED 0 /* Interrupts enabled OFF OFF OFF */
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#define LED_STACKCREATED 1 /* Idle stack created ON OFF OFF */
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#define LED_INIRQ 2 /* In an interrupt N/C GLOW OFF */
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#define LED_SIGNAL 2 /* In a signal handler N/C GLOW OFF */
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#define LED_ASSERTION 2 /* An assertion failed N/C GLOW OFF */
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#define LED_PANIC 3 /* The system has crashed N/C N/C Blinking */
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#define LED_PANIC 3 /* MCU is is sleep mode ------ Not used -------- */
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/* Thus if LED L is statically on, NuttX has successfully booted and is,
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* apparently, running normmally. If LED RX is glowing, then NuttX is
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* handling interupts (and also signals and assertions). If TX is flashing
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* at approximately 2Hz, then a fatal error has been detected and the system
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*/
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/* Button definitions ***************************************************************/
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/* There are no buttons on the Arduino Due board. */
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/************************************************************************************
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* Public Data
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************************************************************************************/
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#ifndef __ASSEMBLY__
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#undef EXTERN
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#if defined(__cplusplus)
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#define EXTERN extern "C"
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extern "C" {
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#else
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#define EXTERN extern
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#endif
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/************************************************************************************
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* Public Function Prototypes
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************************************************************************************/
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/************************************************************************************
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* Name: sam_boardinitialize
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*
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* Description:
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* All SAM3X architectures must provide the following entry point. This entry point
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* is called early in the intitialization -- after all memory has been configured
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* and mapped but before any devices have been initialized.
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*
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************************************************************************************/
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void sam_boardinitialize(void);
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/************************************************************************************
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* Name: sam_ledinit, sam_setled, and sam_setleds
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*
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* Description:
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* If CONFIG_ARCH_LEDS is defined, then NuttX will control the on-board LEDs. If
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* CONFIG_ARCH_LEDS is not defined, then the following interfacesare available to
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* control the LEDs from user applications.
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*
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************************************************************************************/
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#ifndef CONFIG_ARCH_LEDS
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void sam_ledinit(void);
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void sam_setled(int led, bool ledon);
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void sam_setleds(uint8_t ledset);
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#endif
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#undef EXTERN
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#if defined(__cplusplus)
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}
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#endif
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#endif /* __ASSEMBLY__ */
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#endif /* __CONFIGS_ARDUINO_DUE_INCLUDE_BOARD_H */
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