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1387b736b7
samd21-arduino-bootloader and its dependencies will only be included if no other stdio_% (other than stdio_cdc_acm) is included.
49 lines
1.4 KiB
C
49 lines
1.4 KiB
C
/*
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* Copyright (C) 2019 Inria
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* 2019 Kees Bakker, SODAQ
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @ingroup boards_common
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* @{
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* @file
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* @brief Board common implementations for managing an Arduino bootloader
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*
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* @author Alexandre Abadie <alexandre.abadie@inria.fr>
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* @author Kees Bakker <kees@sodaq.com>
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*
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* @}
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*/
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#ifdef MODULE_BOARDS_COMMON_SAMD21_ARDUINO_BOOTLOADER
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#define USB_H_USER_IS_RIOT_INTERNAL
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#include "usb_board_reset.h"
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#define SAMD21_DOUBLE_TAP_ADDR (0x20007FFCUL)
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#define SAMD21_DOUBLE_TAP_MAGIC_NUMBER (0x07738135UL)
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void usb_board_reset_in_bootloader(void)
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{
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/* The Arduino bootloader checks for a magic number in SRAM to remain in
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bootloader mode.
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See
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https://github.com/arduino/ArduinoCore-samd/blob/master/bootloaders/zero/board_definitions_arduino_mkr1000.h#L38
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and
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https://github.com/arduino/ArduinoCore-samd/blob/master/bootloaders/zero/main.c#L94
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for implementation details. */
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uint32_t *reset_addr = (uint32_t *)SAMD21_DOUBLE_TAP_ADDR;
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*reset_addr = (uint32_t)SAMD21_DOUBLE_TAP_MAGIC_NUMBER;
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usb_board_reset_in_application();
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}
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#else
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typedef int dont_be_pedantic;
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#endif /* MODULE_BOARDS_COMMON_SAMD21_ARDUINO_BOOTLOADER */
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