/************************************************************************************
* configs/arduino-due/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_ARDUINO_DUE_INCLUDE_BOARD_H
#define __CONFIGS_ARDUINO_DUE_INCLUDE_BOARD_H
/************************************************************************************
* Included Files
************************************************************************************/
#include <nuttx/config.h>
#ifndef __ASSEMBLY__
# include <stdint.h>
# include <stdbool.h>
# ifdef CONFIG_SAM34_GPIO_IRQ
# include <arch/irq.h>
# endif
#endif
/************************************************************************************
* Pre-processor Definitions
************************************************************************************/
/* Clocking *************************************************************************/
/* After power-on reset, the SAM3X device is running on a 4MHz internal RC. These
* definitions will configure clocking
*
* MAINOSC: Frequency = 12MHz (crysta)
* PLLA: PLL Divider = 1, Multiplier = 14 to generate PLLACK = 168MHz
* Master Clock (MCK): Source = PLLACK, Prescalar = 1 to generate MCK = 84MHz
* CPU clock: 84MHz
*/
#define BOARD_32KOSC_FREQUENCY (32768)
#define BOARD_SCLK_FREQUENCY (BOARD_32KOSC_FREQUENCY)
#define BOARD_MAINOSC_FREQUENCY (12000000) /* MAINOSC: 12MHz crystal on-board */
/* 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 = 14
*/
#define BOARD_CKGR_PLLAR_MUL (13 << PMC_CKGR_PLLAR_MUL_SHIFT)
#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_PLLA_FREQUENCY (168000000) /* PLLACK: 14 * 12Mhz / 1 */
#define BOARD_MCK_FREQUENCY (84000000) /* MCK: PLLACK / 2 */
#define BOARD_CPU_FREQUENCY (84000000) /* CPU: MCK */
/* HSMCI clocking
*
* Multimedia Card Interface clock (MCCK or MCI_CK) is Master Clock (MCK)
* divided by (2*(CLKDIV+1)).
*
* MCI_SPEED = MCCK / (2*(CLKDIV+1))
* CLKDIV = MCCK / MCI_SPEED / 2 - 1
*
* Where CLKDIV has a range of 0-255.
*/
/* MCK = 84MHz, CLKDIV = 104, MCI_SPEED = 84MHz / 2 * (104+1) = 400 KHz */
#define HSMCI_INIT_CLKDIV (104 << HSMCI_MR_CLKDIV_SHIFT)
/* MCK = 84MHz, CLKDIV = 2, MCI_SPEED = 84MHz / 2 * (2+1) = 14 MHz */
#define HSMCI_MMCXFR_CLKDIV (1 << HSMCI_MR_CLKDIV_SHIFT)
/* MCK = 84MHz, CLKDIV = 1, MCI_SPEED = 84MHz / 2 * (1+1) = 21 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 17MHz 19MHz
* 1 45MHz 50MHz
* 2 58MHz 64MHz
* 3 70MHz 80MHz
* 4 78MHz 90MHz
*/
#define BOARD_FWS 4
/* LED definitions ******************************************************************/
/* There are three user-controllable LEDs on board the Arduino Due board:
*
* LED GPIO
* ---------------- -----
* L Amber LED PB27
* TX Yellow LED PA21
* RX Yellow LED PC30
*
* LED L is connected to ground and can be illuminated by driving the PB27
* output high. The TX and RX LEDs are pulled high and can be illuminated by
* driving the corresponding
* GPIO output to low.
*/
/* LED index values for use with board_userled() */
#define BOARD_LED_L 0
#define BOARD_LED_RX 1
#define BOARD_LED_TX 2
#define BOARD_NLEDS 3
/* LED bits for use with board_userled_all() */
#define BOARD_LED_L_BIT (1 << BOARD_LED_L)
#define BOARD_LED_RX_BIT (1 << BOARD_LED_RX)
#define BOARD_LED_TX_BIT (1 << BOARD_LED_TX)
/* 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/sam_leds.c. The LEDs are used to encode OS-related
* events as follows:
*
* SYMBOL MEANING LED STATE
* L TX RX
* ----------------------- -------------------------- -------- -------- -------- */
#define LED_STARTED 0 /* NuttX has been started OFF OFF OFF */
#define LED_HEAPALLOCATE 0 /* Heap has been allocated OFF OFF OFF */
#define LED_IRQSENABLED 0 /* Interrupts enabled OFF OFF OFF */
#define LED_STACKCREATED 1 /* Idle stack created ON OFF OFF */
#define LED_INIRQ 2 /* In an interrupt N/C GLOW OFF */
#define LED_SIGNAL 2 /* In a signal handler N/C GLOW OFF */
#define LED_ASSERTION 2 /* An assertion failed N/C GLOW OFF */
#define LED_PANIC 3 /* The system has crashed N/C N/C Blinking */
#define LED_PANIC 3 /* MCU is is sleep mode ------ Not used -------- */
/* Thus if LED L is statically on, NuttX has successfully booted and is,
* apparently, running normmally. If LED RX is glowing, then NuttX is
* handling interrupts (and also signals and assertions). If TX is flashing
* at approximately 2Hz, then a fatal error has been detected and the system
*/
/* Button definitions ***************************************************************/
/* There are no buttons on the Arduino Due board. */
/* GPIO pin configurations **********************************************************/
#if 1 /* #ifdef CONFIG_ARDUINO_DUE_REV3 works with REV2 as well */
/* This port was performed on the Arduino Due Rev 2 board. A NuttX user reported
* issues with the serial port on his Aduino Due Rev 3 board. That problem was
* resolved as follows:
*
* "... The issue was in my hardware. I found the difference between Arduino
* Due shematics (revision R2) and actual PCB layout of my Arduino (revision
* R3). On a schematics which I download from arduino.cc was shown that 2nd
* pin of IC10 is connected to the ground, but on my Arduino the 2nd pin
* of IC10 was connected to its 1st pin instead of ground and in my case
* IC10 works in open-drain mode, but RX0 pin on SAM3x doesn't have pull-up
* and thus TX signal from AtMega16U2 can't reach the SAM3x input pin, on
* this pin always '0'.
*
* "My solution is to enable internal pull-up in SAM3x. ...
* Now shell console on UART0 (via USB programming connector) of Arduino Due
* Due works as expected."
*/
# undef GPIO_UART0_RXD
# define GPIO_UART0_RXD (GPIO_PERIPHA | GPIO_CFG_DEFAULT | GPIO_PORT_PIOA | \
GPIO_PIN8 | GPIO_CFG_PULLUP)
#endif
/************************************************************************************
* 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 SAM3X 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);
#undef EXTERN
#if defined(__cplusplus)
}
#endif
#endif /* __ASSEMBLY__ */
#endif /* __CONFIGS_ARDUINO_DUE_INCLUDE_BOARD_H */