mirror of
https://github.com/licsber/micropython.git
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69 lines
2.5 KiB
C
69 lines
2.5 KiB
C
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/*
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* This file is part of the MicroPython 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 (40)
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#define DFU_MAGIC_SERIAL_ONLY_RESET 0x4e
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#define DFU_MAGIC_UF2_RESET 0x57
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#define DFU_MAGIC_OTA_RESET 0xA8
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void XIAO_board_early_init(void) {
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// Errata XIAOBLE - 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 IMU power and I2C Pull-up on startup
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nrf_gpio_cfg(PIN_ENABLE_SENSORS_3V3,
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NRF_GPIO_PIN_DIR_OUTPUT,
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NRF_GPIO_PIN_INPUT_DISCONNECT,
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NRF_GPIO_PIN_NOPULL,
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GPIO_PIN_CNF_DRIVE_S0H1,
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NRF_GPIO_PIN_NOSENSE);
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nrf_gpio_pin_set(PIN_ENABLE_SENSORS_3V3);
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}
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void XIAO_board_deinit(void) {
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nrf_gpio_cfg_output(PIN_ENABLE_SENSORS_3V3);
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nrf_gpio_pin_clear(PIN_ENABLE_SENSORS_3V3);
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}
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void XIAO_board_enter_bootloader(void) {
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__disable_irq();
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NRF_POWER->GPREGRET = DFU_MAGIC_UF2_RESET;
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NVIC_SystemReset();
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}
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