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39 lines
929 B
C
39 lines
929 B
C
/*
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* SPDX-FileCopyrightText: 2020 Inria
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* SPDX-License-Identifier: LGPL-2.1-only
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*/
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/**
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* @ingroup boards_common_adafruit-nrf52-bootloader
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* @{
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* @file
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* @brief Reset Logic for the Adafruit nRF52 Bootloader
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*
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* @author Alexandre Abadie <alexandre.abadie@inria.fr>
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*
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* @}
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*/
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#ifdef MODULE_USB_BOARD_RESET
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#define USB_H_USER_IS_RIOT_INTERNAL
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#include "cpu.h"
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#include "usb_board_reset.h"
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/* Set the value used by the bootloader to select between boot in
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application and boot in bootloader mode. */
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#define NRF52_DOUBLE_TAP_MAGIC_NUMBER (0x57)
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void usb_board_reset_in_bootloader(void)
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{
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NRF_POWER->GPREGRET = NRF52_DOUBLE_TAP_MAGIC_NUMBER;
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/* Going with a hard reset rather than a pm_off, as that might be altered
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* to do *anything* -- which is not safe any more now that we've forsaken
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* the RAM content */
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NVIC_SystemReset();
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}
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#endif /* MODULE_USB_BOARD_RESET */
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