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nuttx/configs/metro-m4/include/board.h
Gregory Nutt cb5b8a197d Update a README file.
2018-07-26 12:54:22 -06:00

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/************************************************************************************
* configs/metro-m4/include/board.h
*
* Copyright (C) 2018 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 __CONFIG_METRO_M4_INCLUDE_BOARD_H
#define __CONFIG_METRO_M4_INCLUDE_BOARD_H
/************************************************************************************
* Included Files
************************************************************************************/
#include <nuttx/config.h>
#ifndef __ASSEMBLY__
# include <stdint.h>
# include <stdbool.h>
#endif
/************************************************************************************
* Pre-processor Definitions
************************************************************************************/
/* Clocking *************************************************************************/
/* Overview
*
* Since there is no high speed crystal, we will run from the OSC16M clock source.
* We will use its default, POR frequency of 4MHz to avoid an additional clock
* switch.
*
* OSC16M Output = 4MHz
* `- GCLK1 Input = 4MHz Prescaler = 1 output = 4MHz
* `- DFLL Input = 4MHz Multiplier = 12 output = 48MHz
* `- GCLK0 Input = 48MHz Prescaler = 1 output = 48MHz
* `- MCLK Input = 48Mhz CPU divider = 1 CPU frequency = 48MHz
* APBA divider = 1 APBA frequency = 48MHz
* APBB divider = 1 APBB frequency = 48MHz
* APBC divider = 1 APBC frequency = 48MHz
* APBD divider = 1 APBD frequency = 48MHz
* APBE divider = 1 APBE frequency = 48MHz
*
* The Adafruit Metro M4 has one on-board crystal:
*
* X4 32.768KHz XOSC32
*
* REVISIT: Not currently used, may want to use as GCLK1 source with
* DFLL multiplier of ((48000000+16384)/32768) = 1465 which would yield
* a clock of 48,005,120 MHz.
*/
/* XOSC Configuration -- Not available
*
* BOARD_XOSC_ENABLE - Boolean (defined / not defined)
* BOARD_XOSC_FREQUENCY - In Hz
* BOARD_XOSC_STARTUPTIME - See SYSCTRL_XOSC_STARTUP_* definitions
* BOARD_XOSC_ISCRYSTAL - Boolean (defined / not defined)
* BOARD_XOSC_AMPGC - Boolean (defined / not defined)
* BOARD_XOSC_ONDEMAND - Boolean (defined / not defined)
* BOARD_XOSC_RUNINSTANDBY - Boolean (defined / not defined)
*/
#undef BOARD_XOSC_ENABLE
#define BOARD_XOSC_FREQUENCY 12000000UL
#define BOARD_XOSC_STARTUPTIME SYSCTRL_XOSC_STARTUP_1S
#define BOARD_XOSC_ISCRYSTAL 1
#define BOARD_XOSC_AMPGC 1
#define BOARD_XOSC_ONDEMAND 1
#undef BOARD_XOSC_RUNINSTANDBY
/* XOSC32 Configuration -- Not used
*
* BOARD_XOSC32K_ENABLE - Boolean (defined / not defined)
* BOARD_XOSC32K_FREQUENCY - In Hz
* BOARD_XOSC32K_STARTUPTIME - See SYSCTRL_XOSC32K_STARTUP_* definitions
* BOARD_XOSC32K_ISCRYSTAL - Boolean (defined / not defined)
* BOARD_XOSC32K_AAMPEN - Boolean (defined / not defined)
* BOARD_XOSC32K_EN1KHZ - Boolean (defined / not defined)
* BOARD_XOSC32K_EN32KHZ - Boolean (defined / not defined)
* BOARD_XOSC32K_ONDEMAND - Boolean (defined / not defined)
* BOARD_XOSC32K_RUNINSTANDBY - Boolean (defined / not defined)
* BOARD_XOSC32K_WRITELOCK - Boolean (defined / not defined)
*/
#undef BOARD_XOSC32K_ENABLE
#ifdef CONFIG_METRO_M4_XOSC32K
# define BOARD_XOSC32K_ENABLE 1
# define BOARD_XOSC32K_FREQUENCY 32768 /* 32.768KHz XTAL */
# define BOARD_XOSC32K_STARTUPTIME OSC32KCTRL_XOSC32K_STARTUP_100MS
# define BOARD_XOSC32K_ISCRYSTAL 1
# undef BOARD_XOSC32K_EN1KHZ
# define BOARD_XOSC32K_EN32KHZ 1
# define BOARD_XOSC32K_ONDEMAND 1
# undef BOARD_XOSC32K_RUNINSTANDBY
# undef BOARD_XOSC32K_WRITELOCK
#endif
/* OSC32 Configuration -- not used
*
* BOARD_OSC32K_ENABLE - Boolean (defined / not defined)
* BOARD_OSC32K_FREQUENCY - In Hz
* BOARD_OSC32K_STARTUPTIME - See SYSCTRL_OSC32K_STARTUP_* definitions
* BOARD_OSC32K_EN1KHZ - Boolean (defined / not defined)
* BOARD_OSC32K_EN32KHZ - Boolean (defined / not defined)
* BOARD_OSC32K_ONDEMAND - Boolean (defined / not defined)
* BOARD_OSC32K_RUNINSTANDBY - Boolean (defined / not defined)
* BOARD_OSC32K_WRITELOCK - Boolean (defined / not defined)
*/
#undef BOARD_OSC32K_ENABLE
#define BOARD_OSC32K_FREQUENCY 32768 /* 32.768kHz internal oscillator */
#define BOARD_OSC32K_STARTUPTIME SYSCTRL_OSC32K_STARTUP_4MS
#define BOARD_OSC32K_EN1KHZ 1
#define BOARD_OSC32K_EN32KHZ 1
#define BOARD_OSC32K_ONDEMAND 1
#undef BOARD_OSC32K_RUNINSTANDBY
#undef BOARD_OSC32K_WRITELOCK
/* OSC16M Configuration -- always enabled
*
* BOARD_OSC16M_FSEL - See OSCCTRL_OSC16MCTRL_FSEL_* definitions
* BOARD_OSC16M_ONDEMAND - Boolean (defined / not defined)
* BOARD_OSC16M_RUNINSTANDBY - Boolean (defined / not defined)
*/
#if defined(CONFIG_METRO_M4_OSC16M_4MHZ)
# define BOARD_OSC16M_FSEL OSCCTRL_OSC16MCTRL_FSEL_4MHZ
# define BOARD_OSC16M_ONDEMAND 1
# undef BOARD_OSC16M_RUNINSTANDBY
# define BOARD_OSC16M_FREQUENCY 4000000 /* 4MHz high-accuracy internal oscillator */
#elif defined(CONFIG_METRO_M4_OSC16M_8MHZ)
# define BOARD_OSC16M_FSEL OSCCTRL_OSC16MCTRL_FSEL_8MHZ
# define BOARD_OSC16M_ONDEMAND 1
# undef BOARD_OSC16M_RUNINSTANDBY
# define BOARD_OSC16M_FREQUENCY 8000000 /* 8MHz high-accuracy internal oscillator */
#elif defined(CONFIG_METRO_M4_OSC16M_12MHZ)
# define BOARD_OSC16M_FSEL OSCCTRL_OSC16MCTRL_FSEL_12MHZ
# define BOARD_OSC16M_ONDEMAND 1
# undef BOARD_OSC16M_RUNINSTANDBY
# define BOARD_OSC16M_FREQUENCY 12000000 /* 12MHz high-accuracy internal oscillator */
#elif defined(CONFIG_METRO_M4_OSC16M_16MHZ)
# define BOARD_OSC16M_FSEL OSCCTRL_OSC16MCTRL_FSEL_16MHZ
# define BOARD_OSC16M_ONDEMAND 1
# undef BOARD_OSC16M_RUNINSTANDBY
# define BOARD_OSC16M_FREQUENCY 16000000 /* 18MHz high-accuracy internal oscillator */
#else
# error OSC16M operating freqency not defined (CONFIG_METRO_M4_OSC16M_*MHZ)
#endif
/* OSCULP32K Configuration -- not used. */
#define BOARD_OSCULP32K_FREQUENCY 32000 /* 32kHz ultra-low-power internal oscillator */
/* Digital Frequency Locked Loop configuration. In closed-loop mode, the
* DFLL output frequency (Fdfll) is given by:
*
* Fdfll = DFLLmul * Frefclk
* = 12 * 4000000 = 48MHz
*
* Where the reference clock is Generic Clock Channel 0 output of GLCK1.
* GCLCK1 provides OSC16M, undivided.
*
* When operating in open-loop mode, the output frequency of the DFLL will
* be determined by the values written to the DFLL Coarse Value bit group
* and the DFLL Fine Value bit group in the DFLL Value register.
*
* BOARD_DFLL48M_CLOSEDLOOP - Boolean (defined / not defined)
* BOARD_DFLL48M_OPENLOOP - Boolean (defined / not defined)
* BOARD_DFLL48M_RECOVERY - Boolean (defined / not defined)
* BOARD_DFLL48M_TRACKAFTERFINELOCK - Boolean (defined / not defined)
* BOARD_DFLL48M_KEEPLOCKONWAKEUP - Boolean (defined / not defined)
* BOARD_DFLL48M_ENABLECHILLCYCLE - Boolean (defined / not defined)
* BOARD_DFLL48M_QUICKLOCK - Boolean (defined / not defined)
* BOARD_DFLL48M_RUNINSTDBY - Boolean (defined / not defined)
* BOARD_DFLL48M_ONDEMAND - Boolean (defined / not defined)
* BOARD_DFLL48M_COARSEVALUE - Value
* BOARD_DFLL48M_FINEVALUE - Value
*
* Open Loop mode only:
* BOARD_DFLL48M_COARSEVALUE - Value
* BOARD_DFLL48M_FINEVALUE - Value
*
* Closed loop mode only:
* BOARD_DFLL48M_REFCLK_CLKGEN - GCLK index in the range {0..8}
* BOARD_DFLL48M_MULTIPLIER - Value
* BOARD_DFLL48M_MAXCOARSESTEP - Value
* BOARD_DFLL48M_MAXFINESTEP - Value
*
* BOARD_DFLL48M_FREQUENCY - The resulting frequency
*/
#undef BOARD_DFLL48M_ENABLE 1 /* Assume not using the DFLL48M */
#undef BOARD_DFLL48M_CLOSEDLOOP
#undef BOARD_DFLL48M_OPENLOOP
#undef BOARD_DFLL48M_RECOVERY
#ifdef CONFIG_METRO_M4_DFLL
# define BOARD_DFLL48M_ENABLE 1 /* Using the DFLL48M */
/* DFLL mode of operation */
# if defined(CONFIG_METRO_M4_DFLL_OPENLOOP)
# define BOARD_DFLL48M_OPENLOOP 1 /* In open loop mode */
# elif defined(CONFIG_METRO_M4_DFLL_CLOSEDLOOP)
# define BOARD_DFLL48M_CLOSEDLOOP 1 /* In closed loop mode */
# elif defined(CONFIG_METRO_M4_DFLL_RECOVERY)
# define BOARD_DFLL48M_RECOVERY 1 /* In USB recover mode */
# else
# error DFLL mode not provided
# endif
/* DFLL source clock selection */
# if defined(CONFIG_METRO_M4_DFLL_OSC16MSRC)
# define BOARD_DFLL_SRC_FREQUENCY BOARD_OSC16M_FREQUENCY
# elif defined(CONFIG_METRO_M4_DFLL_XOSC32KSRC)
# define BOARD_DFLL_SRC_FREQUENCY BOARD_XOSC32K_FREQUENCY
# else
# error DFLL clock source not provided
# endif
/* Mode-independent options */
# undef BOARD_DFLL48M_RUNINSTDBY
# undef BOARD_DFLL48M_ONDEMAND
/* DFLL open loop mode configuration */
# define BOARD_DFLL48M_COARSEVALUE (0x1f / 4)
# define BOARD_DFLL48M_FINEVALUE (0xff / 4)
/* DFLL closed loop mode configuration */
# define BOARD_DFLL48M_REFCLK_CLKGEN 1
# define BOARD_DFLL48M_MULTIPLIER (48000000 / BOARD_DFLL_SRC_FREQUENCY)
# define BOARD_DFLL48M_QUICKLOCK 1
# define BOARD_DFLL48M_TRACKAFTERFINELOCK 1
# define BOARD_DFLL48M_KEEPLOCKONWAKEUP 1
# define BOARD_DFLL48M_ENABLECHILLCYCLE 1
# define BOARD_DFLL48M_MAXCOARSESTEP (0x1f / 4)
# define BOARD_DFLL48M_MAXFINESTEP (0xff / 4)
# ifdef CONFIG_METRO_M4_DFLL_OPENLOOP
# define BOARD_DFLL48M_FREQUENCY (13720000) /* REVISIT: Needs to be measured */
# else
# define BOARD_DFLL48M_FREQUENCY (BOARD_DFLL48M_MULTIPLIER * BOARD_DFLL_SRC_FREQUENCY)
# endif
#endif
/* Fractional Digital Phase Locked Loop configuration.
*
* BOARD_FDPLL96M_ENABLE - Boolean (defined / not defined)
* BOARD_FDPLL96M_RUNINSTDBY - Boolean (defined / not defined)
* BOARD_FDPLL96M_ONDEMAND - Boolean (defined / not defined)
* BOARD_FDPLL96M_LBYPASS - Boolean (defined / not defined)
* BOARD_FDPLL96M_WUF - Boolean (defined / not defined)
* BOARD_FDPLL96M_LPEN - Boolean (defined / not defined)
* BOARD_FDPLL96M_FILTER - See OSCCTRL_DPLLCTRLB_FILTER_* definitions
* BOARD_FDPLL96M_REFCLK - See OSCCTRL_DPLLCTRLB_REFLCK_* definitions
* BOARD_FDPLL96M_REFCLK_CLKGEN - GCLK index in the range {0..8}
* BOARD_FDPLL96M_LOCKTIME_ENABLE - Boolean (defined / not defined)
* BOARD_FDPLL96M_LOCKTIME - See OSCCTRL_DPLLCTRLB_LTIME_* definitions
* BOARD_FDPLL96M_LOCKTIME_CLKGEN - GCLK index in the range {0..8}
* BOARD_FDPLL96M_REFDIV - Numeric value, 1 - 2047
* BOARD_FDPLL96M_PRESCALER - See OSCCTRL_DPLLPRESC_* definitions
* BOARD_FDPLL96M_REFFREQ - Numeric value
* BOARD_FDPLL96M_FREQUENCY - Numeric value
*/
#undef BOARD_FDPLL96M_ENABLE
#undef BOARD_FDPLL96M_RUNINSTDBY
#define BOARD_FDPLL96M_ONDEMAND 1
#undef BOARD_FDPLL96M_LBYPASS
#undef BOARD_FDPLL96M_WUF
#undef BOARD_FDPLL96M_LPEN
#define BOARD_FDPLL96M_FILTER OSCCTRL_DPLLCTRLB_FILTER_DEFAULT
#define BOARD_FDPLL96M_REFCLK OSCCTRL_DPLLCTRLB_REFLCK_XOSCK32K
#define BOARD_FDPLL96M_REFCLK_CLKGEN 1
#undef BOARD_FDPLL96M_LOCKTIME_ENABLE
#define BOARD_FDPLL96M_LOCKTIME OSCCTRL_DPLLCTRLB_LTIME_NONE
#define BOARD_FDPLL96M_LOCKTIME_CLKGEN 1
#define BOARD_FDPLL96M_REFDIV 1
#define BOARD_FDPLL96M_PRESCALER OSCCTRL_DPLLPRESC_DIV1
#define BOARD_FDPLL96M_REFFREQ 32768
#define BOARD_FDPLL96M_FREQUENCY 48000000
/* GCLK Configuration
*
* Global enable/disable.
*
* BOARD_GCLK_ENABLE - *MUST* be defined
*
* For n=1-7:
* BOARD_GCLKn_ENABLE - Boolean (defined / not defined)
*
* For n=0-8:
* BOARD_GCLKn_RUN_IN_STANDBY - Boolean (defined / not defined)
* BOARD_GCLKn_CLOCK_SOURCE - See GCLK_GENCTRL_SRC_* definitions
* BOARD_GCLKn_PRESCALER - Value
* BOARD_GCLKn_OUTPUT_ENABLE - Boolean (defined / not defined)
*/
#define BOARD_GCLK_ENABLE 1
/* GCLK generator 0 (Main Clock) - Source is the DFLL */
#ifdef CONFIG_METRO_M4_DFLL
# undef BOARD_GCLK0_RUN_IN_STANDBY
# define BOARD_GCLK0_CLOCK_SOURCE GCLK_GENCTRL_SRC_DFLL48M
# define BOARD_GCLK0_PRESCALER 1
# undef BOARD_GCLK0_OUTPUT_ENABLE
# define BOARD_GCLK0_FREQUENCY (BOARD_DFLL48M_FREQUENCY / BOARD_GCLK0_PRESCALER)
#else
# undef BOARD_GCLK0_RUN_IN_STANDBY
# define BOARD_GCLK0_CLOCK_SOURCE GCLK_GENCTRL_SRC_OSC16M
# define BOARD_GCLK0_PRESCALER 1
# undef BOARD_GCLK0_OUTPUT_ENABLE
# define BOARD_GCLK0_FREQUENCY (BOARD_OSC16M_FREQUENCY / BOARD_GCLK0_PRESCALER)
#endif
/* Configure GCLK generator 1 - Drives the DFLL */
#if defined(CONFIG_METRO_M4_DFLL_OSC16MSRC)
# define BOARD_GCLK1_ENABLE 1
# undef BOARD_GCLK1_RUN_IN_STANDBY
# define BOARD_GCLK1_CLOCK_SOURCE GCLK_GENCTRL_SRC_OSC16M
# define BOARD_GCLK1_PRESCALER 1
# undef BOARD_GCLK1_OUTPUT_ENABLE
# define BOARD_GCLK1_FREQUENCY (BOARD_OSC16M_FREQUENCY / BOARD_GCLK1_PRESCALER)
#elif defined(CONFIG_METRO_M4_DFLL_XOSC32KSRC)
# define BOARD_GCLK1_ENABLE 1
# undef BOARD_GCLK1_RUN_IN_STANDBY
# define BOARD_GCLK1_CLOCK_SOURCE GCLK_GENCTRL_SRC_XOSC32K
# define BOARD_GCLK1_PRESCALER 1
# undef BOARD_GCLK1_OUTPUT_ENABLE
# define BOARD_GCLK1_FREQUENCY (BOARD_XOSC32K_FREQUENCY / BOARD_GCLK1_PRESCALER)
#else
# error DFLL clock source not provided
#endif
/* Configure GCLK generator 2 (RTC) */
#undef BOARD_GCLK2_ENABLE
#undef BOARD_GCLK2_RUN_IN_STANDBY
#define BOARD_GCLK2_CLOCK_SOURCE GCLK_GENCTRL_SRC_OSC32K
#define BOARD_GCLK2_PRESCALER 32
#undef BOARD_GCLK2_OUTPUT_ENABLE
#define BOARD_GCLK2_FREQUENCY (BOARD_OSC32K_FREQUENCY / BOARD_GCLK2_PRESCALER)
/* Configure GCLK generator 3 */
#undef BOARD_GCLK3_ENABLE
#undef BOARD_GCLK3_RUN_IN_STANDBY
#define BOARD_GCLK3_CLOCK_SOURCE GCLK_GENCTRL_SRC_OSC16M
#define BOARD_GCLK3_PRESCALER 1
#undef BOARD_GCLK3_OUTPUT_ENABLE
#define BOARD_GCLK3_FREQUENCY (BOARD_OSC16M_FREQUENCY / BOARD_GCLK3_PRESCALER)
/* Configure GCLK generator 4 */
#undef BOARD_GCLK4_ENABLE
#undef BOARD_GCLK4_RUN_IN_STANDBY
#define BOARD_GCLK4_CLOCK_SOURCE GCLK_GENCTRL_SRC_OSC16M
#define BOARD_GCLK4_PRESCALER 1
#undef BOARD_GCLK4_OUTPUT_ENABLE
#define BOARD_GCLK4_FREQUENCY (BOARD_OSC16M_FREQUENCY / BOARD_GCLK4_PRESCALER)
/* Configure GCLK generator 5 */
#undef BOARD_GCLK5_ENABLE
#undef BOARD_GCLK5_RUN_IN_STANDBY
#define BOARD_GCLK5_CLOCK_SOURCE GCLK_GENCTRL_SRC_OSC16M
#define BOARD_GCLK5_PRESCALER 1
#undef BOARD_GCLK5_OUTPUT_ENABLE
#define BOARD_GCLK5_FREQUENCY (BOARD_OSC16M_FREQUENCY / BOARD_GCLK5_PRESCALER)
/* Configure GCLK generator 6 */
#undef BOARD_GCLK6_ENABLE
#undef BOARD_GCLK6_RUN_IN_STANDBY
#define BOARD_GCLK6_CLOCK_SOURCE GCLK_GENCTRL_SRC_OSC16M
#define BOARD_GCLK6_PRESCALER 1
#undef BOARD_GCLK6_OUTPUT_ENABLE
#define BOARD_GCLK6_FREQUENCY (BOARD_OSC16M_FREQUENCY / BOARD_GCLK6_PRESCALER)
/* Configure GCLK generator 7 */
#undef BOARD_GCLK7_ENABLE
#undef BOARD_GCLK7_RUN_IN_STANDBY
#define BOARD_GCLK7_CLOCK_SOURCE GCLK_GENCTRL_SRC_OSC16M
#define BOARD_GCLK7_PRESCALER 1
#undef BOARD_GCLK7_OUTPUT_ENABLE
#define BOARD_GCLK7_FREQUENCY (BOARD_OSC16M_FREQUENCY / BOARD_GCLK7_PRESCALER)
/* Configure GCLK generator 8 */
#undef BOARD_GCLK8_ENABLE
#undef BOARD_GCLK8_RUN_IN_STANDBY
#define BOARD_GCLK8_CLOCK_SOURCE GCLK_GENCTRL_SRC_OSC16M
#define BOARD_GCLK8_PRESCALER 1
#undef BOARD_GCLK8_OUTPUT_ENABLE
#define BOARD_GCLK8_FREQUENCY (BOARD_OSC16M_FREQUENCY / BOARD_GCLK8_PRESCALER)
/* The source of the main clock is always GCLK_MAIN. Also called GCLKGEN[0], this is
* the clock feeding the Power Manager. The Power Manager, in turn, generates main
* clock which is divided down to produce the CPU, AHB, and APB clocks.
*
* The main clock is initially OSC16M divided by 8.
*/
#define BOARD_GCLK_MAIN_FREQUENCY BOARD_GCLK0_FREQUENCY
/* Main clock dividers
*
* BOARD_CPU_DIVIDER - See MCLK_CPUDIV_DIV* definitions
* BOARD_CPU_FRQUENCY - In Hz
* BOARD_CPU_FAILDECT - Boolean (defined / not defined)
* BOARD_LOWPOWER_DIVIDER - See MCLK_LPDIV_DIV_* definitions
* BOARD_LOWPOWER_FREQUENCY - In Hz
* BOARD_BACKUP_DIVIDER - See MCLK_BUPDIV_DIV_* definitions
* BOARD_BACKUP_FREQUENCY - In Hz
*/
#undef BOARD_CPU_FAILDECT
#define BOARD_CPU_DIVIDER MCLK_CPUDIV_DIV1
#define BOARD_LOWPOWER_DIVIDER MCLK_LPDIV_DIV1
#define BOARD_BACKUP_DIVIDER MCLK_BUPDIV_DIV1
/* Resulting frequencies */
#define BOARD_MCK_FREQUENCY (BOARD_GCLK_MAIN_FREQUENCY)
#define BOARD_CPU_FREQUENCY (BOARD_MCK_FREQUENCY)
#define BOARD_LOWPOWER_FREQUENCY (BOARD_MCK_FREQUENCY)
#define BOARD_BACKUP_FREQUENCY (BOARD_MCK_FREQUENCY)
#define BOARD_APBA_FREQUENCY (BOARD_MCK_FREQUENCY)
#define BOARD_APBB_FREQUENCY (BOARD_MCK_FREQUENCY)
#define BOARD_APBC_FREQUENCY (BOARD_MCK_FREQUENCY)
#define BOARD_APBD_FREQUENCY (BOARD_MCK_FREQUENCY)
#define BOARD_APBE_FREQUENCY (BOARD_MCK_FREQUENCY)
/* FLASH wait states
*
* REVISIT: These values come from the SAMD20
* Vdd Range Wait states Maximum Operating Frequency
* ------------- -------------- ---------------------------
* 1.62V to 2.7V 0 14 MHz
* 1 28 MHz
* 2 42 MHz
* 3 48 MHz
* 2.7V to 3.63V 0 24 MHz
* 1 48 MHz
*/
#if 0
# define BOARD_FLASH_WAITSTATES 3
#else
# define BOARD_FLASH_WAITSTATES 1
#endif
/* LED definitions ******************************************************************/
/* The Adafruit Metro M4 has four LEDs, but only two are controllable by software:
*
* 1. The red LED on the Arduino D13 pin, and
* 2. A NeoPixel RGB LED.
*
* Currently, only the red LED is supported.
*
* ------ ----------------- -----------
* SHIELD SAMD5E5 FUNCTION
* ------ ----------------- -----------
* D13 PA16 GPIO output
*/
/* LED index values for use with board_userled() */
#define BOARD_RED_LED 0
#define BOARD_NLEDS 1
/* LED bits for use with board_userled_all() */
#define BOARD_RED_LED_BIT (1 << BOARD_RED_LED)
/* This LED is 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_autoleds.c. The LEDs are used to encode
* OS-related events as follows:
*
* ------------------- ---------------------------- ------
* SYMBOL Meaning LED
* ------------------- ---------------------------- ------ */
#define LED_STARTED 0 /* NuttX has been started OFF */
#define LED_HEAPALLOCATE 0 /* Heap has been allocated OFF */
#define LED_IRQSENABLED 0 /* Interrupts enabled OFF */
#define LED_STACKCREATED 1 /* Idle stack created ON */
#define LED_INIRQ 2 /* In an interrupt N/C */
#define LED_SIGNAL 2 /* In a signal handler N/C */
#define LED_ASSERTION 2 /* An assertion failed N/C */
#define LED_PANIC 3 /* The system has crashed FLASH */
#undef LED_IDLE /* MCU is is sleep mode Not used */
/* Thus is LED is statically on, NuttX has successfully booted and is,
* apparently, running normally. If LED is flashing at approximately
* 2Hz, then a fatal error has been detected and the system has halted.
*/
/* Alternate function pin selections ************************************************/
/* SERCOM definitions ***************************************************************/
/* The SERCOM bus clock (CLK_SERCOMx_APB) can be enabled and disabled in the Main
* Clock Controller. The SERCOM uses two generic clocks: GCLK_SERCOMx_CORE and
* GCLK_SERCOMx_SLOW. The core clock (GCLK_SERCOMx_CORE) is required to clock the
* SERCOM while working as a master. The slow clock (GCLK_SERCOMx_SLOW) is only
* required for certain functions.
*
* These clocks must be configured and enabled in the Generic Clock Controller (GCLK)
* before using the SERCOM.
*/
/* SERCOM3
*
* An Arduino compatible serial Shield is assumed (or equivalently, an external
* RS-232 or serial-to-USB adapter connected on Arduino pins D0 and D1):
*
* ------ ----------------- ---------
* SHIELD SAMD5E5 FUNCTION
* ------ ----------------- ---------
* D0 PA23 SERCOM3 PAD2 RXD
* D1 PA22 SERCOM3 PAD0 TXD
*
* NOTES:
* USART_CTRLA_TXPAD0_1: TxD=PAD0 XCK=PAD1 RTS/TE=N/A CTS=N/A
* USART_CTRLA_RXPAD2: RxD=PAD2
*/
#define BOARD_SERCOM3_MUXCONFIG (USART_CTRLA_TXPAD0_1 | USART_CTRLA_RXPAD2)
#define BOARD_SERCOM3_PINMAP_PAD0 PORT_SERCOM3_PAD0_1 /* USART TX */
#define BOARD_SERCOM3_PINMAP_PAD1 PORT_SERCOM3_PAD2_1 /* USART RX */
#define BOARD_SERCOM3_PINMAP_PAD2 0 /* (not used) */
#define BOARD_SERCOM3_PINMAP_PAD3 0 /* (not used) */
#define BOARD_SERCOM3_FREQUENCY BOARD_GCLK0_FREQUENCY
#endif /* __CONFIG_METRO_M4_INCLUDE_BOARD_H */
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