8000 nrf: Add support for Arduino Nano 33 BLE board. · micropython/micropython@43375a8 · GitHub
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nrf: Add support for Arduino Nano 33 BLE board.
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‎ports/nrf/boards/arduino_nano_33_ble/board.c

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/*
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* This file is part of the M 8000 icroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2022 Arduino SA
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "nrf.h"
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#include "nrf_gpio.h"
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#include "nrf_rtc.h"
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#define PIN_ENABLE_SENSORS_3V3 (22u)
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#define PIN_ENABLE_I2C_PULLUP (32u)
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#define DFU_MAGIC_SERIAL_ONLY_RESET (0xb0)
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void NANO33_board_early_init(void) {
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// Errata Nano33BLE - I2C pullup is on SWO line, need to disable TRACE
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// was being enabled by nrfx_clock_anomaly_132
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CoreDebug->DEMCR = 0;
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NRF_CLOCK->TRACECONFIG = 0;
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// Bootloader enables interrupt on COMPARE[0], which we don't handle
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// Disable it here to avoid getting stuck when OVERFLOW irq is triggered
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nrf_rtc_event_disable(NRF_RTC1, NRF_RTC_INT_COMPARE0_MASK);
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nrf_rtc_int_disable(NRF_RTC1, NRF_RTC_INT_COMPARE0_MASK);
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// Always enable I2C pullup and power on startup
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// Change for maximum powersave
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nrf_gpio_cfg_output(PIN_ENABLE_SENSORS_3V3);
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nrf_gpio_cfg_output(PIN_ENABLE_I2C_PULLUP);
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nrf_gpio_pin_set(PIN_ENABLE_SENSORS_3V3);
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nrf_gpio_pin_set(PIN_ENABLE_I2C_PULLUP);
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}
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void NANO33_board_deinit(void) {
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nrf_gpio_cfg_output(PIN_ENABLE_SENSORS_3V3);
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nrf_gpio_cfg_output(PIN_ENABLE_I2C_PULLUP);
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nrf_gpio_pin_clear(PIN_ENABLE_SENSORS_3V3);
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nrf_gpio_pin_clear(PIN_ENABLE_I2C_PULLUP);
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}
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void NANO33_board_enter_bootloader(void) {
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__disable_irq();
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NRF_POWER->GPREGRET = DFU_MAGIC_SERIAL_ONLY_RESET;
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NVIC_SystemReset();
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}

‎ports/nrf/boards/arduino_nano_33_ble/board.json

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{
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"deploy": [
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"./deploy.md"
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],
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"docs": "",
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"features": [
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"Bluetooth 5.0",
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"IMU LSM9DS1",
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"Humidity sensor HTS221",
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"Pressure sensor LPS22H",
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"Proximity, Light, RGB sensor APDS-9960",
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"Microphone MPM3610",
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"Crypto IC ARM CC310",
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"USB-MICRO",
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"Breadboard Friendly"
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],
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"images": [
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"ABX00030_01.iso_1000x750.jpg"
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],
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"mcu": "nRF52840",
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"product": "Arduino Nano 33 BLE",
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"thumbnail": "",
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"url": "https://store.arduino.cc/products/arduino-nano-33-ble",
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"vendor": "Arduino"
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}

‎ports/nrf/boards/arduino_nano_33_ble/deploy.md

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### Update the bootloader
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Before deploying any firmware, make sure you have the updated Arduino Nano 33 BLE bootloader, which relocates the bootloader so the softdevice doesn't overwrite it. Please see:
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https://docs.arduino.cc/tutorials/nano-33-ble/getting-started-omv
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### Via Arduino bootloader and BOSSA
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Download BOSSA from https://github.com/shumatech/BOSSA/ and double tap reset button to enter the Arduino bootloader
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```bash
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bossac -e -w --offset=0x16000 --port=ttyACM0 -i -d -U -R build-arduino_nano_33_ble-s140/firmware.bin
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```
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Alternatively, a Linux binary can be found here: https://github.com/openmv/openmv/blob/master/tools/bossac
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### Via nrfprog
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This board can also be programmed via nrfjprog (with Jlink for example), from MicroPython source repository:
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```bash
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make -j8 BOARD=arduino_nano_33_ble SD=s140 deploy
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```

‎ports/nrf/boards/arduino_nano_33_ble/manifest.py

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include("$(PORT_DIR)/modules/manifest.py")
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freeze("$(BOARD_DIR)/modules")

‎ports/nrf/boards/arduino_nano_33_ble/modules/hts221.py

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"""
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The MIT License (MIT)
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Copyright (c) 2013-2022 Ibrahim Abdelkader <iabdalkader@openmv.io>
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Copyright (c) 2013-2022 Kwabena W. Agyeman <kwagyeman@openmv.io>
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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HTS221 driver driver for MicroPython.
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Original source: https://github.com/ControlEverythingCommunity/HTS221/blob/master/Python/HTS221.py
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"""
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import struct
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class HTS221:
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def __init__(self, i2c, data_rate=1, dev_addr=0x5F):
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self.bus = i2c
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self.odr = data_rate
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self.slv_addr = dev_addr
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# Set configuration register
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# Humidity and temperature average configuration
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self.bus.writeto_mem(self.slv_addr, 0x10, b"\x1B")
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# Set control register
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# PD | BDU | ODR
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cfg = 0x80 | 0x04 | (self.odr & 0x3)
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self.bus.writeto_mem(self.slv_addr, 0x20, bytes([cfg]))
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# Read Calibration values from non-volatile memory of the device
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# Humidity Calibration values
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self.H0 = self._read_reg(0x30, 1) / 2
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self.H1 = self._read_reg(0x31, 1) / 2
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self.H2 = self._read_reg(0x36, 2)
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self.H3 = self._read_reg(0x3A, 2)
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# Temperature Calibration values
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raw = self._read_reg(0x35, 1)
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self.T0 = ((raw & 0x03) * 256) + self._read_reg(0x32, 1)
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self.T1 = ((raw & 0x0C) * 64) + self._read_reg(0x33, 1)
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self.T2 = self._read_reg(0x3C, 2)
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self.T3 = self._read_reg(0x3E, 2)
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def _read_reg(self, reg_addr, size):
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fmt = "B" if size == 1 else "H"
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reg_addr = reg_addr if size == 1 else reg_addr | 0x80
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return struct.unpack(fmt, self.bus.readfrom_mem(self.slv_addr, reg_addr, size))[0]
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def humidity(self):
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rH = self._read_reg(0x28, 2)
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return (self.H1 - self.H0) * (rH - self.H2) / (self.H3 - self.H2) + self.H0
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def temperature(self):
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temp = self._read_reg(0x2A, 2)
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if temp > 32767:
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temp -= 65536
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return ((self.T1 - self.T0) / 8.0) * (temp - self.T2) / (self.T3 - self.T2) + (
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self.T0 / 8.0
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)

‎ports/nrf/boards/arduino_nano_33_ble/modules/lps22h.py

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"""
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The MIT License (MIT)
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Copyright (c) 2016-2019 shaoziyang <shaoziyang@micropython.org.cn>
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Copyright (c) 2022 Ibrahim Abdelkader <iabdalkader@openmv.io>
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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LPS22HB/HH pressure sensor driver for MicroPython.
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Basic example usage:
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import time
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from lps22h import LPS22H
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from machine import Pin, I2C
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bus = I2C(1, scl=Pin(15), sda=Pin(14))
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lps = LPS22H(bus, oneshot=False)
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while (True):
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print("Pressure: %.2f hPa Temperature: %.2f C"%(lps.pressure(), lps.temperature()))
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time.sleep_ms(10)
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"""
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import machine
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_LPS22_CTRL_REG1 = const(0x10)
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_LPS22_CTRL_REG2 = const(0x11)
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_LPS22_STATUS = const(0x27)
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_LPS22_TEMP_OUT_L = const(0x2B)
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_LPS22_PRESS_OUT_XL = const(0x28)
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_LPS22_PRESS_OUT_L = const(0x29)
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class LPS22H:
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def __init__(self, i2c, addr=0x5C, oneshot=False):
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self.i2c = i2c
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self.addr = addr
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self.oneshot = oneshot
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self.buf = bytearray(1)
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if hasattr(machine, "idle"):
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self._go_idle = lambda: machine.idle()
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else:
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import time
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self._go_idle = lambda: time.sleep_ms(1)
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# ODR=1 EN_LPFP=1 BDU=1
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self._write_reg(_LPS22_CTRL_REG1, 0x1A)
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self.set_oneshot_mode(self.oneshot)
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def _int16(self, d):
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return d if d < 0x8000 else d - 0x10000
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def _write_reg(self, reg, dat):
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self.buf[0] = dat
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self.i2c.writeto_mem(self.addr, reg, self.buf)
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def _read_reg(self, reg, width=8):
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self.i2c.readfrom_mem_into(self.addr, reg, self.buf)
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val = self.buf[0]
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if width == 16:
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val |= self._read_reg(reg + 1) << 8
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return val
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def _tigger_oneshot(self, b):
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if self.oneshot:
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self._write_reg(_LPS22_CTRL_REG2, self._read_reg(_LPS22_CTRL_REG2) | 0x01)
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self._read_reg(0x28 + b * 2)
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while True:
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if self._read_reg(_LPS22_STATUS) & b:
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return
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self._go_idle()
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def set_oneshot_mode(self, oneshot):
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self._read_reg(_LPS22_CTRL_REG1)
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self.oneshot = oneshot
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if oneshot:
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self.buf[0] &= 0x0F
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else:
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self.buf[0] |= 0x10
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self._write_reg(_LPS22_CTRL_REG1, self.buf[0])
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def pressure(self):
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if self.oneshot:
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self._tigger_oneshot(1)
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return (
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self._read_reg(_LPS22_PRESS_OUT_XL) + self._read_reg(_LPS22_PRESS_OUT_L, 16) * 256
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) / 4096
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def temperature(self):
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if self.oneshot:
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self._tigger_oneshot(2)
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return self._int16(self._read_reg(_LPS22_TEMP_OUT_L, 16)) / 100
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def altitude(self):
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return (
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(((1013.25 / self.pressure()) ** (1 / 5.257)) - 1.0)
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* (self.temperature() + 273.15)
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/ 0.0065
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)

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