mirror of
https://github.com/RIOT-OS/RIOT.git
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79 lines
2.1 KiB
C
79 lines
2.1 KiB
C
/*
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* Copyright (C) 2020 Christian Amsüss <chrysn@fsfe.org>
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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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/** @ingroup bootloaders
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*
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* @{
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*
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* @file
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* @brief Configuration for the riotboot_dfu bootloader
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*
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* @author Christian Amsüss <chrysn@fsfe.org>
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*/
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/* Include guards and cplusplus are more of a formality; this header is local
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* to the riotboot_dfu application that isn't written in C++ and not included
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* from anywhere else either, but still here for consistency (and because
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* otherwise the checks complain) */
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#ifndef BOOTLOADER_SELECTION_H
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#define BOOTLOADER_SELECTION_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Not including GPIO headers: we're not actually *doing* anything on GPIO, and
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* if no BTN0_PIN is defined we don't define anything either */
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#include <board.h>
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/** @brief Button pin for bootloader selection
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*
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* This pin (typically connected to a button) is checked by the riotboot_dfu
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* bootloader to decide whether to enter DFU mode even if a valid image is
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* present.
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*
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* The default value for all boards is BTN0, if one is defined.
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*
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* Boards that insist on not using any button even though they have some can
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* define BTN_BOOTLOADER_NONE in their `board.h`.
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*
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* */
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#if (!defined(BTN_BOOTLOADER_PIN) && defined(BTN0_PIN) && !defined(BTN_BOOTLOADER_NONE)) || DOXYGEN
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#define BTN_BOOTLOADER_PIN BTN0_PIN
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#endif
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/** @brief Pin mode for @ref BTN_BOOTLOADER_PIN
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*
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* Mode into which the riotboot_dfu bootloader will configure @ref
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* BTN_BOOTLOADER_PIN before reading it.
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*
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* */
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#ifndef BTN_BOOTLOADER_MODE
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#define BTN_BOOTLOADER_MODE BTN0_MODE
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#endif
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/** @brief Interpretation of @ref BTN_BOOTLOADER_PIN.
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*
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* Set to true for active-low buttons (go to DFU if the pin is low), otherwise
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* to false (go to DFU if the pin is high).
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*
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* The default value for all boards is inverted (active-low).
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*
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* */
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#ifndef BTN_BOOTLOADER_INVERTED
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#define BTN_BOOTLOADER_INVERTED true
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif /* BOOTLOADER_SELECTION_H */
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/** @} */
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