board/arduino-nano-33-ble: add initial support

boards/arduino-nano-33-ble/Makefile

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+MODULE = board
+
+include $(RIOTBASE)/Makefile.base

boards/arduino-nano-33-ble/Makefile.dep

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+ifneq (,$(filter saul_default,$(USEMODULE)))
+  USEMODULE += saul_gpio
+endif
+
+# use arduino-bootloader only if no other stdio_% other than stdio_cdc_acm
+# is requested
+ifeq (,$(filter-out stdio_cdc_acm,$(filter stdio_% slipdev_stdio,$(USEMODULE))))
+  # Provide stdio over USB by default
+  USEMODULE += stdio_cdc_acm
+
+  # This board requires support for Arduino bootloader.
+  FEATURES_REQUIRED += bootloader_arduino
+  USEMODULE += usb_board_reset
+endif
+
+# include common nrf52 dependencies
+include $(RIOTBOARD)/common/nrf52/Makefile.dep

boards/arduino-nano-33-ble/Makefile.features

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+CPU_MODEL = nrf52840xxaa
+
+# Put defined MCU peripherals here (in alphabetical order)
+FEATURES_PROVIDED += periph_i2c
+FEATURES_PROVIDED += periph_spi
+FEATURES_PROVIDED += periph_uart
+FEATURES_PROVIDED += periph_usbdev
+
+# Various other features (if any)
+FEATURES_PROVIDED += radio_nrf802154
+FEATURES_PROVIDED += bootloader_arduino
+
+include $(RIOTBOARD)/common/nrf52/Makefile.features

boards/arduino-nano-33-ble/Makefile.include

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+# Bossa is the default programmer
+PROGRAMMER ?= bossa
+
+ifeq ($(PROGRAMMER),bossa)
+  # The preinstalled Arduino bootloader must also be taken into account so
+  # ROM_OFFSET skips the space taken by such bootloader.
+  ROM_OFFSET ?= 0x10000
+
+  # This board requires a BOSSA version from arduino's fork and adapted to
+  # nrf52.
+  BOSSA_VERSION = nrf52
+  BOSSA_ARDUINO_PREFLASH = yes
+  PREFLASH_DELAY = 1
+
+  ifneq (,$(filter reset flash flash-only, $(MAKECMDGOALS)))
+    # Add 2 seconds delay before opening terminal: this is required when opening
+    # the terminal right after flashing. In this case, the stdio over USB needs
+    # some time after reset before being ready.
+    TERM_DELAY = 2
+    TERMDEPS += term-delay
+  endif
+
+  include $(RIOTMAKE)/tools/bossa.inc.mk
+endif
+
+term-delay:
+	sleep $(TERM_DELAY)
+
+TESTRUNNER_CONNECT_DELAY ?= 2
+$(call target-export-variables,test,TESTRUNNER_CONNECT_DELAY)
+
+include $(RIOTBOARD)/common/nrf52/Makefile.include

boards/arduino-nano-33-ble/board.c

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+/*
+ * Copyright (C) 2020 Inria
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/**
+ * @ingroup     boards_arduino-nano-33-ble
+ * @{
+ *
+ * @file
+ * @brief       Board initialization for the Arduino Nano 33 BLE
+ *
+ * @author      Alexandre Abadie <alexandre.abadie@inria.fr>
+ *
+ * @}
+ */
+
+#include "cpu.h"
+#include "board.h"
+
+#include "periph/gpio.h"
+
+void board_init(void)
+{
+    /* initialize the CPU */
+    cpu_init();
+
+    /* initialize the boards LEDs */
+    gpio_init(LED0_PIN, GPIO_OUT); /* Orange LED */
+    gpio_init(LED1_PIN, GPIO_OUT); /* Red LED */
+    gpio_set(LED1_PIN);
+    gpio_init(LED2_PIN, GPIO_OUT); /* Green LED */
+    gpio_set(LED2_PIN);
+    gpio_init(LED3_PIN, GPIO_OUT); /* Blue LED */
+    gpio_set(LED3_PIN);
+    gpio_init(LED4_PIN, GPIO_OUT); /* PWR LED */
+    gpio_clear(LED4_PIN);
+}

boards/arduino-nano-33-ble/doc.txt

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+/**
+@defgroup    boards_arduino-nano-33-ble Arduino Nano 33 BLE
+@ingroup     boards
+@brief       Support for the Arduino Nano 33 BLE
+
+### General information
+
+The [Arduino Nano 33 BLE](https://store.arduino.cc/arduino-nano-33-ble) board
+is an opensource, micro development kit using the nRF52840 SoC.
+This board provides 802.15.4 and BLE connectivity.
+
+### Pinout
+
+<img src="https://content.arduino.cc/assets/Pinout-NANOble_latest.png"
+     alt="pinout" style="height:800px;"/>
+
+### Flash the board
+
+Use `BOARD=arduino-nano-33-ble` with the `make` command.<br/>
+Example with `hello-world` application:
+```
+    make BOARD=arduino-nano-33-ble -C examples/hello-world flash
+```
+
+### Accessing STDIO via UART
+
+The STDIO is directly accessible via the USB port. On a Linux host, it's
+generally mapped to `/dev/ttyACM0`.
+
+Use the `term` target to connect to the board serial port<br/>
+```
+    make BOARD=arduino-nano-33-ble -C examples/hello-world term
+```
+ */

boards/arduino-nano-33-ble/include/board.h

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+/*
+ * Copyright (C) 2020 Inria
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/**
+ * @ingroup     boards_arduino-nano-33-ble
+ * @{
+ *
+ * @file
+ * @brief       Board specific configuration for the Arduino Nano 33 BLE
+ *
+ * @author      Alexandre Abadie <alexandre.abadie@inria.fr>
+ */
+
+#ifndef BOARD_H
+#define BOARD_H
+
+#include "cpu.h"
+#include "board_common.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @name    LEDs pin configuration
+ * @{
+ */
+#define LED0_PIN            GPIO_PIN(0, 13)
+#define LED0_MASK           (1 << 13)
+#define LED0_ON             (NRF_P0->OUTCLR = LED0_MASK)
+#define LED0_OFF            (NRF_P0->OUTSET = LED0_MASK)
+#define LED0_TOGGLE         (NRF_P0->OUT   ^= LED0_MASK)
+
+#define LED1_PIN            GPIO_PIN(0, 24)
+#define LED1_MASK           (1 << 24)
+#define LED1_ON             (NRF_P0->OUTCLR = LED1_MASK)
+#define LED1_OFF            (NRF_P0->OUTSET = LED1_MASK)
+#define LED1_TOGGLE         (NRF_P0->OUT   ^= LED1_MASK)
+
+#define LED2_PIN            GPIO_PIN(0, 16)
+#define LED2_MASK           (1 << 16)
+#define LED2_ON             (NRF_P0->OUTCLR = LED2_MASK)
+#define LED2_OFF            (NRF_P0->OUTSET = LED2_MASK)
+#define LED2_TOGGLE         (NRF_P0->OUT   ^= LED2_MASK)
+
+#define LED3_PIN            GPIO_PIN(0, 6)
+#define LED3_MASK           (1 << 6)
+#define LED3_ON             (NRF_P0->OUTCLR = LED3_MASK)
+#define LED3_OFF            (NRF_P0->OUTSET = LED3_MASK)
+#define LED3_TOGGLE         (NRF_P0->OUT   ^= LED3_MASK)
+
+#define LED4_PIN            GPIO_PIN(1, 9)
+#define LED4_MASK           (1 << 9)
+#define LED4_ON             (NRF_P1->OUTCLR = LED4_MASK)
+#define LED4_OFF            (NRF_P1->OUTSET = LED4_MASK)
+#define LED4_TOGGLE         (NRF_P1->OUT   ^= LED4_MASK)
+/** @} */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* BOARD_H */
+/** @} */

boards/arduino-nano-33-ble/include/gpio_params.h

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+/*
+ * Copyright (C) 2020 Inria
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/**
+ * @ingroup     boards_arduino-nano-33-ble
+ * @{
+ *
+ * @file
+ * @brief       Configuration of SAUL mapped GPIO pins
+ *
+ * @author      Alexandre Abadie <alexandre.abadie@inria.fr>
+ */
+
+#ifndef GPIO_PARAMS_H
+#define GPIO_PARAMS_H
+
+#include "board.h"
+#include "saul/periph.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief    LED configuration
+ */
+static const  saul_gpio_params_t saul_gpio_params[] =
+{
+    {
+        .name  = "LED0 (Orange)",
+        .pin   = LED0_PIN,
+        .mode  = GPIO_OUT,
+    },
+    {
+        .name  = "LED1 (RED)",
+        .pin   = LED1_PIN,
+        .mode  = GPIO_OUT,
+        .flags = (SAUL_GPIO_INVERTED | SAUL_GPIO_INIT_CLEAR),
+    },
+    {
+        .name  = "LED2 (GREEN)",
+        .pin   = LED2_PIN,
+        .mode  = GPIO_OUT,
+        .flags = (SAUL_GPIO_INVERTED | SAUL_GPIO_INIT_CLEAR),
+    },
+    {
+        .name  = "LED3 (BLUE)",
+        .pin   = LED3_PIN,
+        .mode  = GPIO_OUT,
+        .flags = (SAUL_GPIO_INVERTED | SAUL_GPIO_INIT_CLEAR),
+    },
+    {
+        .name  = "LED4 (PWR)",
+        .pin   = LED4_PIN,
+        .mode  = GPIO_OUT,
+    },
+};
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* GPIO_PARAMS_H */
+/** @} */

boards/arduino-nano-33-ble/include/periph_conf.h

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+/*
+ * Copyright (C) 2020 Inria
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/**
+ * @ingroup     boards_arduino-nano-33-ble
+ * @{
+ *
+ * @file
+ * @brief       Peripheral configuration for the Arduino Nano 33 BLE
+ *
+ * @author      Alexandre Abadie <alexandre.abadie@inria.fr>
+ *
+ */
+
+#ifndef PERIPH_CONF_H
+#define PERIPH_CONF_H
+
+#include "periph_cpu.h"
+#include "cfg_clock_32_1.h"
+#include "cfg_rtt_default.h"
+#include "cfg_timer_default.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @name    UART configuration
+ * @{
+ */
+static const uart_conf_t uart_config[] = {
+    {
+        .dev        = NRF_UARTE0,
+        .rx_pin     = GPIO_PIN(1, 10),
+        .tx_pin     = GPIO_PIN(1, 3),
+#ifdef MODULE_PERIPH_UART_HW_FC
+        .rts_pin    = GPIO_UNDEF,
+        .cts_pin    = GPIO_UNDEF,
+#endif
+        .irqn       = UARTE0_UART0_IRQn,
+    },
+};
+
+#define UART_0_ISR          (isr_uart0)
+
+#define UART_NUMOF          ARRAY_SIZE(uart_config)
+/** @} */
+
+/**
+ * @name    I2C configuration
+ * @{
+ */
+static const i2c_conf_t i2c_config[] = {
+    {
+        .dev = NRF_TWIM0,
+        .scl = GPIO_PIN(0, 2),
+        .sda = GPIO_PIN(0, 31),
+        .speed = I2C_SPEED_NORMAL
+    },
+};
+
+#define I2C_NUMOF           (sizeof(i2c_config) / sizeof(i2c_config[0]))
+/** @} */
+
+/**
+ * @name    SPI configuration
+ * @{
+ */
+static const spi_conf_t spi_config[] = {
+    {
+        .dev  = NRF_SPI0,
+        .sclk = GPIO_PIN(0, 13),
+        .mosi = GPIO_PIN(1, 1),
+        .miso = GPIO_PIN(1, 8),
+    }
+};
+
+#define SPI_NUMOF           ARRAY_SIZE(spi_config)
+/** @} */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* PERIPH_CONF_H */