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board support: added support for the Seeed Studio XIAO SAMD21 board

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Matteo Golin 2024-10-19 00:28:07 -04:00 committed by Xiang Xiao
parent ca74d81a04
commit 6cf1681447
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138
Documentation/platforms/arm/samd2l2/boards/xiao-seeeduino/index.rst Normal file
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========================
Seeed Studio Xiao SAMD21
========================
The `Seeed Studio Xiao SAM21 <https://wiki.seeedstudio.com/Seeeduino-XIAO/>`_ is the first of the XIAO family, and is a
general purpose, low-power and tiny board. It can be referred to as the "Seeed Studio Xiao SAMD21" or the "Xiao
Seeeduino".
.. figure:: seeed-xiao-samd21.jpg
:align: center
Features
========
* ATSAMD21G18A-MU microcontroller chip @48MHz
* 256KB flash
* 32KB SRAM
* 14 pins (11 analog, 11 digital)
* 10 PWM interfaces
* 1 DAC output pin
* Serial wire debug interface
* 1 I2C interface
* 1 SPI interface
* 1 UART interface
* USBC interface
* Serial communication indicator LEDs for TX and RX (blue)
* Power indicator LED (green)
* Blinkable LED (yellow)
Serial Console
==============
By default, the serial console appears on the board's UART interface. Pin 9 is
TX and pin 7 is RX.
Pin Mapping
===========
Pins are numbered anticlockwise from the USB connector.
===== ======== ========================================
Pin Signal Notes
===== ======== ========================================
0 PA2 A0/D0/DAC
1 PA4 A1/D1
2 PA10 A2/D2
3 PA11 A3/D3
4 PA8 A4/D4/SDA (I2C)
5 PA9 A5/D5/SCL (I2C)
6 PB08 A6/D6/TX (UART)
7 PB09 A7/D7/RX (UART)
8 PA7 A8/D8/SCK (SPI)
9 PA5 A9/D9/MISO (SPI)
10 PA6 A10/D10/MOSI (SPI)
11 3V3
12 GND
13 5V You can supply 5V power on this pin too.
===== ======== ========================================
There are also four pads on the back side of the board. SWCLK, SWDIO for serial
wire debugging, and RST and GND for resetting the board. These same two pins are
also exposed on the top of the board.
Power Supply
============
The board can be powered through a USB-C connection. It can also be supplied 5V
power through it's 5V power pin.
There is an additional two pads for powering the board (VIN and GND) on the back
side. The board accepts anywhere between 3.3V and 5V.
Installation
============
To build NuttX for the Xiao Seeduino, you can use the following configuration
commands within the cloned ``nuttx`` repository:
.. code-block:: console
$ ./tools/configure.sh xiao-seeeduino:nsh
$ make
This will generate a ``nuttx.hex`` file. To put the program on your board, you
can choose from one of the following:
1. Convert the hex file to a uf2 file using the `Microsoft uf2 tool <https://github.com/microsoft/uf2/>`_:
.. code-block:: console
$ git clone https://github.com/microsoft/uf2.git
$ cd uf2/utils
$ python uf2conv.py -f 0x68ed2b88 -b 0x2000 nuttx.hex -o nuttx.uf2
Then, plug your board into the host computer using the USB-C interface. Short
the RST (reset) pad with ground twice in a row quickly. The board will be
detected as mass storage under the name "Arduino", and its orange LED will be
pulsing slowly. You can then copy the UF2 file to the drive/storage device
which appears. Once the file is done copying, the board will auto-eject and
you will have an NSH console on the UART pins!
.. todo::
Maybe this process should be part of the post-build scripts, since the
Microsoft UF2 tools is MIT licensed.
2. Flash the hex file using the ``bossac`` tool. You can find the source for it
`here <https://github.com/shumatech/BOSSA/>`_, or you can install it on Arch
Linux via the AUR with this command:
.. code-block:: console
$ yay -S bossa
Then, plug your Seeduino in via USB-C to the host computer and short the RST
(reset) and ground pins twice in a row quickly. The board will be detected as
mass storage under the name "Arduino", and its orange LED should be pulsing.
You can then run the following command:
.. code-block:: console
$ sudo stty -F <path/to/xiao-USB-port> 1200
$ sudo bossac -i -d --port=<path/to/xiao-USB-port> -i -w -v nuttx.hex -R
.. todo::
The ``bossac`` utility doesn't actually work for programming in my testing
yet. It is what the Arduino IDE uses but I haven't managed to get the
commmand line working. Using the commands listed above does actually
detect the board but the programming itself fails with "Flash command
failed". This needs more debugging.
Configurations
==============
nsh
---
Basic NuttShell configuration with the console enabled on the UART interface at
115200 bps. Comes with "Hello world" demo.

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boards/Kconfig
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@ -2328,6 +2328,15 @@ config ARCH_BOARD_SAMD21_XPLAINED
This board features the ATSAMD21J18A MCU (Cortex-M0+ with 256KB of FLASH
and 32KB of SRAM).
config ARCH_BOARD_XIAO_SEEEDUINO
bool "Seeed Studio XIAO SAMD21"
depends on ARCH_CHIP_SAMD21J18A
select ARCH_HAVE_LEDS
---help---
The port of NuttX to the Seeed Studio XIAO SAMD21 board.
This board features the ATSAMD21J18A MCU (Cortex-M0+ with 256KB of FLASH
and 32KB of SRAM) in a tiny footprint.
config ARCH_BOARD_SAME54_XPLAINED_PRO
bool "Atmel SAME54-Xplained Pro development board"
depends on ARCH_CHIP_SAME54P20
@ -3477,6 +3486,7 @@ config ARCH_BOARD
default "sama5d4-ek" if ARCH_BOARD_SAMA5D4_EK
default "samd20-xplained" if ARCH_BOARD_SAMD20_XPLAINED
default "samd21-xplained" if ARCH_BOARD_SAMD21_XPLAINED
default "xiao-seeeduino" if ARCH_BOARD_XIAO_SEEEDUINO
default "same54-xplained-pro" if ARCH_BOARD_SAME54_XPLAINED_PRO
default "saml21-xplained" if ARCH_BOARD_SAML21_XPLAINED
default "sam3u-ek" if ARCH_BOARD_SAM3UEK
@ -3956,6 +3966,9 @@ endif
if ARCH_BOARD_SAMD21_XPLAINED
source "boards/arm/samd2l2/samd21-xplained/Kconfig"
endif
if ARCH_BOARD_XIAO_SEEEDUINO
source "boards/arm/samd2l2/xiao-seeeduino/Kconfig"
endif
if ARCH_BOARD_SAME54_XPLAINED_PRO
source "boards/arm/samd5e5/same54-xplained-pro/Kconfig"
endif

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boards/arm/samd2l2/xiao-seeeduino/Kconfig Normal file
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#
# For a description of the syntax of this configuration file,
# see the file kconfig-language.txt in the NuttX tools repository.
#
if ARCH_BOARD_XIAO_SEEEDUINO
menu "XIAO Seeeduino"
endmenu # XIAO Seeeduino
endif # ARCH_BOARD_XIAO_SEEEDUINO

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boards/arm/samd2l2/xiao-seeeduino/configs/nsh/defconfig Normal file
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#
# This file is autogenerated: PLEASE DO NOT EDIT IT.
#
# You can use "make menuconfig" to make any modifications to the installed .config file.
# You can then do "make savedefconfig" to generate a new defconfig file that includes your
# modifications.
#
# CONFIG_DISABLE_POSIX_TIMERS is not set
# CONFIG_NSH_DISABLEBG is not set
# CONFIG_NSH_DISABLESCRIPT is not set
# CONFIG_NSH_DISABLE_CMP is not set
# CONFIG_NSH_DISABLE_DD is not set
# CONFIG_NSH_DISABLE_EXEC is not set
# CONFIG_NSH_DISABLE_EXIT is not set
# CONFIG_NSH_DISABLE_GET is not set
# CONFIG_NSH_DISABLE_HEXDUMP is not set
# CONFIG_NSH_DISABLE_IFCONFIG is not set
# CONFIG_NSH_DISABLE_ITEF is not set
# CONFIG_NSH_DISABLE_LOOPS is not set
# CONFIG_NSH_DISABLE_LOSETUP is not set
# CONFIG_NSH_DISABLE_MKRD is not set
# CONFIG_NSH_DISABLE_PS is not set
# CONFIG_NSH_DISABLE_PUT is not set
# CONFIG_NSH_DISABLE_SEMICOLON is not set
# CONFIG_NSH_DISABLE_UNAME is not set
# CONFIG_NSH_DISABLE_WGET is not set
# CONFIG_NSH_DISABLE_XD is not set
CONFIG_ARCH="arm"
CONFIG_ARCH_BOARD="xiao-seeeduino"
CONFIG_ARCH_BOARD_XIAO_SEEEDUINO=y
CONFIG_ARCH_CHIP="samd2l2"
CONFIG_ARCH_CHIP_SAMD21J18A=y
CONFIG_ARCH_CHIP_SAMD2X=y
CONFIG_ARCH_STACKDUMP=y
CONFIG_BOARD_LOOPSPERMSEC=3410
CONFIG_BUILTIN=y
CONFIG_DEFAULT_SMALL=y
CONFIG_EXAMPLES_HELLO=y
CONFIG_HAVE_CXX=y
CONFIG_HAVE_CXXINITIALIZE=y
CONFIG_INIT_ENTRYPOINT="nsh_main"
CONFIG_INIT_STACKSIZE=1536
CONFIG_INTELHEX_BINARY=y
CONFIG_NSH_BUILTIN_APPS=y
CONFIG_POSIX_SPAWN_DEFAULT_STACKSIZE=1536
CONFIG_PTHREAD_STACK_DEFAULT=1536
CONFIG_RAM_SIZE=32768
CONFIG_RAM_START=0x20000000
CONFIG_RR_INTERVAL=200
CONFIG_SAMD2L2_SERCOM4=y
CONFIG_SCHED_WAITPID=y
CONFIG_START_DAY=18
CONFIG_START_MONTH=10
CONFIG_START_YEAR=2024
CONFIG_SYSTEM_NSH=y
CONFIG_TASK_NAME_SIZE=0
CONFIG_USART4_RXBUFSIZE=64
CONFIG_USART4_SERIAL_CONSOLE=y
CONFIG_USART4_TXBUFSIZE=64

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boards/arm/samd2l2/xiao-seeeduino/include/board.h Normal file
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/****************************************************************************
* boards/arm/samd2l2/xiao-seeeduino/include/board.h
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
#ifndef __BOARDS_ARM_SAMD2L2_XIAO_SEEEDUINO_INCLUDE_BOARD_H
#define __BOARDS_ARM_SAMD2L2_XIAO_SEEEDUINO_INCLUDE_BOARD_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#ifndef __ASSEMBLY__
# include <stdint.h>
# ifdef CONFIG_SAMD2L2_GPIOIRQ
# include <arch/irq.h>
# endif
#endif
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Clocking *****************************************************************/
/* Overview
*
* OSC8M Output = 8MHz
* `- GCLK1 Input = 8MHz Prescaler = 1 output = 8MHz
* `- DFLL Input = 8MHz Multiplier = 6 output = 48MHz
* `- GCLK0 Input = 48MHz Prescaler = 1 output = 48MHz
* `- PM 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
*
* The SAMD21 Xplained Pro has one on-board crystal:
*
* XC101 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)
*/
#undef BOARD_XOSC32K_ENABLE
#define BOARD_XOSC32K_FREQUENCY 32768 /* 32.768KHz XTAL */
#define BOARD_XOSC32K_STARTUPTIME SYSCTRL_XOSC32K_STARTUP_2S
#define BOARD_XOSC32K_ISCRYSTAL 1
#define BOARD_XOSC32K_AAMPEN 1
#undef BOARD_XOSC32K_EN1KHZ
#define BOARD_XOSC32K_EN32KHZ 1
#define BOARD_XOSC32K_ONDEMAND 1
#undef BOARD_XOSC32K_RUNINSTANDBY
/* 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)
*/
#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
/* OSC8M Configuration -- always enabled
*
* BOARD_OSC8M_PRESCALER - See SYSCTRL_OSC8M_PRESC_DIV* definitions
* BOARD_OSC8M_ONDEMAND - Boolean (defined / not defined)
* BOARD_OSC8M_RUNINSTANDBY - Boolean (defined / not defined)
*/
#define BOARD_OSC8M_PRESCALER SYSCTRL_OSC8M_PRESC_DIV1
#define BOARD_OSC8M_ONDEMAND 1
#undef BOARD_OSC8M_RUNINSTANDBY
#define BOARD_OSC8M_FREQUENCY 8000000 /* 8MHz high-accuracy internal oscillator */
/* 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
* = 6 * 8000000 = 48MHz
*
* Where the reference clock is Generic Clock Channel 0 output of GLCK1.
* GCLCK1 provides OSC8M, 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_DFLL_OPENLOOP - Boolean (defined / not defined)
* BOARD_DFLL_TRACKAFTERFINELOCK - Boolean (defined / not defined)
* BOARD_DFLL_KEEPLOCKONWAKEUP - Boolean (defined / not defined)
* BOARD_DFLL_ENABLECHILLCYCLE - Boolean (defined / not defined)
* BOARD_DFLL_QUICKLOCK - Boolean (defined / not defined)
* BOARD_DFLL_ONDEMAND - Boolean (defined / not defined)
*
* Closed loop mode only:
* BOARD_DFLL_GCLKGEN - GCLK index
* BOARD_DFLL_MULTIPLIER - Value
* BOARD_DFLL_MAXCOARSESTEP - Value
* BOARD_DFLL_MAXFINESTEP - Value
*
* BOARD_DFLL_FREQUENCY - The resulting frequency
*/
#define BOARD_DFLL_ENABLE 1
#define BOARD_DFLL_OPENLOOP 1
#undef BOARD_DFLL_ONDEMAND
#undef BOARD_DFLL_RUNINSTANDBY
/* DFLL closed loop mode configuration */
#define BOARD_DFLL_SRCGCLKGEN 1
#define BOARD_DFLL_MULTIPLIER 6
#define BOARD_DFLL_QUICKLOCK 1
#define BOARD_DFLL_TRACKAFTERFINELOCK 1
#define BOARD_DFLL_KEEPLOCKONWAKEUP 1
#define BOARD_DFLL_ENABLECHILLCYCLE 1
#define BOARD_DFLL_MAXCOARSESTEP (0x1f / 4)
#define BOARD_DFLL_MAXFINESTEP (0xff / 4)
#define BOARD_DFLL_FREQUENCY (48000000)
/* GCLK Configuration
*
* Global enable/disable.
*
* BOARD_GCLK_ENABLE - Boolean (defined / not 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 */
#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_DFLL_FREQUENCY / BOARD_GCLK0_PRESCALER)
/* Configure GCLK generator 1 - Drives the DFLL */
#define BOARD_GCLK1_ENABLE 1
#undef BOARD_GCLK1_RUN_IN_STANDBY
#define BOARD_GCLK1_CLOCK_SOURCE GCLK_GENCTRL_SRC_OSC8M
#define BOARD_GCLK1_PRESCALER 1
#undef BOARD_GCLK1_OUTPUT_ENABLE
#define BOARD_GCLK1_FREQUENCY (BOARD_OSC8M_FREQUENCY / BOARD_GCLK1_PRESCALER)
/* 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_OSC8M_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_OSC8M
#define BOARD_GCLK3_PRESCALER 1
#undef BOARD_GCLK3_OUTPUT_ENABLE
#define BOARD_GCLK3_FREQUENCY (BOARD_OSC8M_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_OSC8M
#define BOARD_GCLK4_PRESCALER 1
#undef BOARD_GCLK4_OUTPUT_ENABLE
#define BOARD_GCLK4_FREQUENCY (BOARD_OSC8M_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_OSC8M
#define BOARD_GCLK5_PRESCALER 1
#undef BOARD_GCLK5_OUTPUT_ENABLE
#define BOARD_GCLK5_FREQUENCY (BOARD_OSC8M_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_OSC8M
#define BOARD_GCLK6_PRESCALER 1
#undef BOARD_GCLK6_OUTPUT_ENABLE
#define BOARD_GCLK6_FREQUENCY (BOARD_OSC8M_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_OSC8M
#define BOARD_GCLK7_PRESCALER 1
#undef BOARD_GCLK7_OUTPUT_ENABLE
#define BOARD_GCLK7_FREQUENCY (BOARD_OSC8M_FREQUENCY / BOARD_GCLK7_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 OSC8M divided by 8.
*/
#define BOARD_GCLK_MAIN_FREQUENCY BOARD_GCLK0_FREQUENCY
/* Main clock dividers
*
* BOARD_CPU_DIVIDER - See PM_CPUSEL_CPUDIV_* definitions
* BOARD_CPU_FREQUENCY - In Hz
* BOARD_CPU_FAILDECT - Boolean (defined / not defined)
* BOARD_APBA_DIVIDER - See M_APBASEL_APBADIV_* definitions
* BOARD_APBA_FREQUENCY - In Hz
* BOARD_APBB_DIVIDER - See M_APBBSEL_APBBDIV_* definitions
* BOARD_APBB_FREQUENCY - In Hz
* BOARD_APBC_DIVIDER - See M_APBCSEL_APBCDIV_* definitions
* BOARD_APBC_FREQUENCY - In Hz
*/
#define BOARD_CPU_FAILDECT 1
#define BOARD_CPU_DIVIDER PM_CPUSEL_CPUDIV_1
#define BOARD_APBA_DIVIDER PM_APBASEL_APBADIV_1
#define BOARD_APBB_DIVIDER PM_APBBSEL_APBBDIV_1
#define BOARD_APBC_DIVIDER PM_APBCSEL_APBCDIV_1
/* Resulting frequencies */
#define BOARD_MCK_FREQUENCY (BOARD_GCLK_MAIN_FREQUENCY)
#define BOARD_CPU_FREQUENCY (BOARD_MCK_FREQUENCY)
#define BOARD_PBA_FREQUENCY (BOARD_MCK_FREQUENCY)
#define BOARD_PBB_FREQUENCY (BOARD_MCK_FREQUENCY)
#define BOARD_PBC_FREQUENCY (BOARD_MCK_FREQUENCY)
#define BOARD_PBD_FREQUENCY (BOARD_MCK_FREQUENCY)
/* FLASH wait states
*
* 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 /* REVISIT -- should not be necessary */
# define BOARD_FLASH_WAITSTATES 1
#else
# define BOARD_FLASH_WAITSTATES 2
#endif
/* SERCOM definitions *******************************************************/
/* This is the source clock generator for the GCLK_SERCOM_SLOW clock that is
* common to all SERCOM modules.
*/
#define BOARD_SERCOM05_SLOW_GCLKGEN 0
/* The SERCOM4 USART is available on the pins below.
*
* PIN EXT1 GPIO Function
* ---- ---- ------------------
* 13 PB09 SERCOM4 / USART RX
* 14 PB08 SERCOM4 / USART TX
* 19 GND N/A
* 20 VCC N/A
*
* If you have a TTL to RS-232 converter then this is the most convenient
* serial console to use (because you don't lose the console device each time
* you lose the USB connection). It is the default in all of the SAMD21
* configurations.
*/
#define BOARD_SERCOM4_GCLKGEN 0
#define BOARD_SERCOM4_SLOW_GCLKGEN BOARD_SERCOM05_SLOW_GCLKGEN
#if defined(CONFIG_USART4_SERIAL_CONSOLE)
# define BOARD_SERCOM4_MUXCONFIG (USART_CTRLA_RXPAD1 | USART_CTRLA_TXPAD0_1)
# define BOARD_SERCOM4_PINMAP_PAD0 PORT_SERCOM4_PAD0_3 /* USART TX */
# define BOARD_SERCOM4_PINMAP_PAD1 PORT_SERCOM4_PAD1_3 /* USART RX */
# define BOARD_SERCOM4_PINMAP_PAD2 0
# define BOARD_SERCOM4_PINMAP_PAD3 0
#endif /* CONFIG_USART4_SERIAL_CONSOLE */
#define BOARD_SERCOM4_FREQUENCY BOARD_GCLK0_FREQUENCY
/* USB definitions **********************************************************/
/* This is the source clock generator for the GCLK_USB clock
*/
#define BOARD_USB_GCLKGEN 0
#define BOARD_USB_FREQUENCY BOARD_GCLK0_FREQUENCY
/* default USB Pad calibration (not used yet by USB driver) */
#define BOARD_USB_PADCAL_P 29
#define BOARD_USB_PADCAL_N 5
#define BOARD_USB_PADCAL_TRIM 3
/* LED definitions **********************************************************/
/* LED index values for use with board_userled() */
#define BOARD_STATUS_LED 0
#define BOARD_NLEDS 1
/* LED bits for use with board_userled_all() */
#define BOARD_STATUS LED_BIT (1 << BOARD_STATUS_LED)
/* When CONFIG_ARCH_LEDS is defined in the NuttX configuration, NuttX will
* control the LED as defined below. Thus if the LED is statically on, NuttX
* has successfully booted and is, apparently, running normally.
* If the LED is flashing at approximately 2Hz, then a fatal error
* has been detected and the system has halted.
*/
#define LED_STARTED 0 /* STATUS LED=OFF */
#define LED_HEAPALLOCATE 0 /* STATUS LED=OFF */
#define LED_IRQSENABLED 0 /* STATUS LED=OFF */
#define LED_STACKCREATED 1 /* STATUS LED=ON */
#define LED_INIRQ 2 /* STATUS LED=no change */
#define LED_SIGNAL 2 /* STATUS LED=no change */
#define LED_ASSERTION 2 /* STATUS LED=no change */
#define LED_PANIC 3 /* STATUS LED=flashing */
#endif /* __BOARDS_ARM_SAMD2L2_XIAO_SEEEDUINO_INCLUDE_BOARD_H */

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############################################################################
# boards/arm/samd2l2/xiao-seeeduino/scripts/Make.defs
#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership. The
# ASF licenses this file to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance with the
# License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
#
############################################################################
include $(TOPDIR)/.config
include $(TOPDIR)/tools/Config.mk
include $(TOPDIR)/arch/arm/src/armv6-m/Toolchain.defs
LDSCRIPT = flash.ld
ARCHSCRIPT += $(BOARD_DIR)$(DELIM)scripts$(DELIM)$(LDSCRIPT)
ARCHPICFLAGS = -fpic -msingle-pic-base -mpic-register=r10
CFLAGS := $(ARCHCFLAGS) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRAFLAGS)
CPICFLAGS = $(ARCHPICFLAGS) $(CFLAGS)
CXXFLAGS := $(ARCHCXXFLAGS) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) $(ARCHXXINCLUDES) $(ARCHDEFINES) $(EXTRAFLAGS)
CXXPICFLAGS = $(ARCHPICFLAGS) $(CXXFLAGS)
CPPFLAGS := $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRAFLAGS)
AFLAGS := $(CFLAGS) -D__ASSEMBLY__
NXFLATLDFLAGS1 = -r -d -warn-common
NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
LDNXFLATFLAGS = -e main -s 2048

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/****************************************************************************
* boards/arm/samd2l2/xiao-seeeduino/scripts/flash.ld
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/* The ATSAMD21J18A has 256KB of FLASH beginning at address 0x0000:0000 and
* 32KB of SRAM beginning at address 0x2000:0000
* However, the XIAO Seeeduino has its UF2 bootloader in the first 8KB.
*/
MEMORY
{
flash (rx) : ORIGIN = 0x00002000, LENGTH = 248K
sram (rwx) : ORIGIN = 0x20000000, LENGTH = 32K
}
OUTPUT_ARCH(arm)
EXTERN(_vectors)
ENTRY(_stext)
SECTIONS
{
.text : {
_stext = ABSOLUTE(.);
*(.vectors)
*(.text .text.*)
*(.fixup)
*(.gnu.warning)
*(.rodata .rodata.*)
*(.gnu.linkonce.t.*)
*(.glue_7)
*(.glue_7t)
*(.got)
*(.gcc_except_table)
*(.gnu.linkonce.r.*)
_etext = ABSOLUTE(.);
} > flash
.init_section : {
_sinit = ABSOLUTE(.);
KEEP(*(SORT_BY_INIT_PRIORITY(.init_array.*) SORT_BY_INIT_PRIORITY(.ctors.*)))
KEEP(*(.init_array EXCLUDE_FILE(*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o) .ctors))
_einit = ABSOLUTE(.);
} > flash
.ARM.extab : {
*(.ARM.extab*)
} >flash
.ARM.exidx : {
__exidx_start = ABSOLUTE(.);
*(.ARM.exidx*)
__exidx_end = ABSOLUTE(.);
} >flash
.data : {
_sdata = ABSOLUTE(.);
*(.data .data.*)
*(.gnu.linkonce.d.*)
CONSTRUCTORS
. = ALIGN(4);
_edata = ABSOLUTE(.);
} > sram AT > flash
_eronly = LOADADDR(.data);
.ramfunc ALIGN(4): {
_sramfuncs = ABSOLUTE(.);
*(.ramfunc .ramfunc.*)
_eramfuncs = ABSOLUTE(.);
} > sram AT > flash
_framfuncs = LOADADDR(.ramfunc);
.bss : {
_sbss = ABSOLUTE(.);
*(.bss .bss.*)
*(.gnu.linkonce.b.*)
*(COMMON)
. = ALIGN(4);
_ebss = ABSOLUTE(.);
} > sram
/* Stabs debugging sections. */
.stab 0 : { *(.stab) }
.stabstr 0 : { *(.stabstr) }
.stab.excl 0 : { *(.stab.excl) }
.stab.exclstr 0 : { *(.stab.exclstr) }
.stab.index 0 : { *(.stab.index) }
.stab.indexstr 0 : { *(.stab.indexstr) }
.comment 0 : { *(.comment) }
.debug_abbrev 0 : { *(.debug_abbrev) }
.debug_info 0 : { *(.debug_info) }
.debug_line 0 : { *(.debug_line) }
.debug_pubnames 0 : { *(.debug_pubnames) }
.debug_aranges 0 : { *(.debug_aranges) }
}

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############################################################################
# boards/arm/samd2l2/xiao-seeeduino/src/Makefile
#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership. The
# ASF licenses this file to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance with the
# License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
#
############################################################################
include $(TOPDIR)/Make.defs
CSRCS = sam_boot.c
ifeq ($(CONFIG_ARCH_LEDS),y)
CSRCS += sam_autoleds.c
endif
ifeq ($(CONFIG_BOARDCTL),y)
CSRCS += sam_appinit.c
endif
include $(TOPDIR)/boards/Board.mk

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/****************************************************************************
* boards/arm/samd2l2/xiao-seeeduino/src/sam_appinit.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdio.h>
#include <syslog.h>
#include <nuttx/board.h>
#include "sam_config.h"
#include "xiao-seeeduino.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: board_app_initialize
*
* Description:
* Perform application specific initialization. This function is never
* called directly from application code, but only indirectly via the
* (non-standard) boardctl() interface using the command BOARDIOC_INIT.
*
* Input Parameters:
* arg - The boardctl() argument is passed to the board_app_initialize()
* implementation without modification. The argument has no
* meaning to NuttX; the meaning of the argument is a contract
* between the board-specific initialization logic and the
* matching application logic. The value could be such things as a
* mode enumeration value, a set of DIP switch switch settings, a
* pointer to configuration data read from a file or serial FLASH,
* or whatever you would like to do with it. Every implementation
* should accept zero/NULL as a default configuration.
*
* Returned Value:
* Zero (OK) is returned on success; a negated errno value is returned on
* any failure to indicate the nature of the failure.
*
****************************************************************************/
int board_app_initialize(uintptr_t arg)
{
return OK;
}

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/****************************************************************************
* boards/arm/samd2l2/xiao-seeeduino/src/sam_autoleds.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/* When CONFIG_ARCH_LEDS is defined in the NuttX configuration, NuttX will
* control the LED as follows:
*
* SYMBOL Meaning LED
* ------------------- ----------------------- ------
* LED_STARTED NuttX has been started OFF
* LED_HEAPALLOCATE Heap has been allocated OFF
* LED_IRQSENABLED Interrupts enabled OFF
* LED_STACKCREATED Idle stack created ON
* LED_INIRQ In an interrupt** N/C
* LED_SIGNAL In a signal handler*** N/C
* LED_ASSERTION An assertion failed N/C
* LED_PANIC The system has crashed FLASH
*
* Thus if the LED is statically on, NuttX has successfully booted and is,
* apparently, running normally. If the LED is flashing at approximately
* 2Hz, then a fatal error has been detected and the system has halted.
*/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include <stdbool.h>
#include <assert.h>
#include <debug.h>
#include <nuttx/board.h>
#include <arch/board/board.h>
#include "sam_port.h"
#include "xiao-seeeduino.h"
#ifdef CONFIG_ARCH_LEDS
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: board_autoled_initialize
****************************************************************************/
void board_autoled_initialize(void)
{
sam_configport(PORT_STATUS_LED);
}
/****************************************************************************
* Name: board_autoled_on
****************************************************************************/
void board_autoled_on(int led)
{
bool ledstate = true;
switch (led)
{
case 0: /* LED_STARTED: NuttX has been started STATUS LED=OFF
* LED_HEAPALLOCATE: Heap has been allocated STATUS LED=OFF
* LED_IRQSENABLED: Interrupts enabled STATUS LED=OFF
*/
break; /* Leave ledstate == true to turn OFF */
default:
case 2: /* LED_INIRQ: In an interrupt STATUS LED=N/C
* LED_SIGNAL: In a signal handler STATUS LED=N/C
* LED_ASSERTION: An assertion failed STATUS LED=N/C
*/
return; /* Return to leave STATUS LED unchanged */
case 3: /* LED_PANIC: The system has crashed STATUS LED=FLASH */
case 1: /* LED_STACKCREATED: Idle stack created STATUS LED=ON */
ledstate = false; /* Set ledstate == false to turn ON */
break;
}
sam_portwrite(PORT_STATUS_LED, ledstate);
}
/****************************************************************************
* Name: board_autoled_off
****************************************************************************/
void board_autoled_off(int led)
{
switch (led)
{
/* These should not happen and are ignored */
default:
case 0: /* LED_STARTED: NuttX has been started STATUS LED=OFF
* LED_HEAPALLOCATE: Heap has been allocated STATUS LED=OFF
* LED_IRQSENABLED: Interrupts enabled STATUS LED=OFF
*/
case 1: /* LED_STACKCREATED: Idle stack created STATUS LED=ON */
/* These result in no-change */
case 2: /* LED_INIRQ: In an interrupt STATUS LED=N/C
* LED_SIGNAL: In a signal handler STATUS LED=N/C
* LED_ASSERTION: An assertion failed STATUS LED=N/C
*/
return; /* Return to leave STATUS LED unchanged */
/* Turn STATUS LED off set driving the output high */
case 3: /* LED_PANIC: The system has crashed STATUS LED=FLASH */
sam_portwrite(PORT_STATUS_LED, true);
break;
}
}
#endif /* CONFIG_ARCH_LEDS */

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/****************************************************************************
* boards/arm/samd2l2/xiao-seeeduino/src/sam_boot.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <debug.h>
#include <nuttx/board.h>
#include "sam_config.h"
#include "xiao-seeeduino.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: sam_boardinitialize
*
* Description:
* All SAM3U architectures must provide the following entry point.
* This entry point is called early in the initialization -- after all
* memory has been configured and mapped but before any devices have been
* initialized.
*
****************************************************************************/
void sam_boardinitialize(void)
{
/* Configure on-board LEDs if LED support has been selected. */
#ifdef CONFIG_ARCH_LEDS
board_autoled_initialize();
#endif
}

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/****************************************************************************
* boards/arm/samd2l2/xiao-seeeduino/src/xiao-seeeduino.h
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
#ifndef __BOARDS_ARM_SAMD2L2_XIAO_SEEEDUINO_SRC_XIAO_SEEEDUINO_H
#define __BOARDS_ARM_SAMD2L2_XIAO_SEEEDUINO_SRC_XIAO_SEEEDUINO_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <stdint.h>
#include <arch/irq.h>
#include <nuttx/irq.h>
#include "sam_config.h"
#include "sam_pinmap.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* LEDs:
* There are three LEDs on board the SAMD21 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 labelled STATIS near the SAMD21
* USB connector.
*
* This LED is controlled by PB30 and the LED can be activated by driving
* PB30 to GND.
*
* When CONFIG_ARCH_LEDS is defined in the NuttX configuration, NuttX will
* control the LED as follows:
*
* SYMBOL Meaning LED
* ------------------- ----------------------- ------
* LED_STARTED NuttX has been started OFF
* LED_HEAPALLOCATE Heap has been allocated OFF
* LED_IRQSENABLED Interrupts enabled OFF
* LED_STACKCREATED Idle stack created ON
* LED_INIRQ In an interrupt N/C
* LED_SIGNAL In a signal handler N/C
* LED_ASSERTION An assertion failed N/C
* LED_PANIC The system has crashed FLASH
*
* Thus if the LED is statically on, NuttX has successfully booted and is,
* apparently, running normally. If the LED is flashing at approximately
* 2Hz, then a fatal error has been detected and the system has halted.
*/
#define PORT_STATUS_LED (PORT_OUTPUT | PORT_PULL_NONE | PORT_OUTPUT_SET | \
PORTA | PORT_PIN4)
/****************************************************************************
* Public Types
****************************************************************************/
/****************************************************************************
* Public Data
****************************************************************************/
#ifndef __ASSEMBLY__
/****************************************************************************
* Public Functions Definitions
****************************************************************************/
#endif /* __ASSEMBLY__ */
#endif /* __BOARDS_ARM_SAMD2L2_XIAO_SEEEDUINO_SRC_XIAO_SEEEDUINO_H */