51 lines
1.1 KiB
C
51 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#ifndef KEYBOARD_H
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#define KEYBOARD_H
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/**
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* \file
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*
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* Provides the keyboard interface. It converts incoming key codes to
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* ASCII characters.
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*
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*//*
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* Copyright (C) 2020-2022 Martin Whitaker.
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*/
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#include <stdbool.h>
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/**
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* The Escape character.
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*/
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#define ESC 27
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/**
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* A set of supported keyboard types.
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*/
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typedef enum {
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KT_NONE = 0,
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KT_LEGACY = 1,
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KT_USB = 2
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} keyboard_types_t;
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/**
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* The set of enabled keyboard types
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*/
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extern keyboard_types_t keyboard_types;
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/**
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* Initialises the keyboard interface.
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*/
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void keyboard_init(void);
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/**
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* Checks if a key has been pressed and returns the primary ASCII character
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* corresponding to that key if so, otherwise returns the null character.
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* F1 to F10 are mapped to the corresponding decimal digit (F10 -> 0). All
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* other keys that don't have a corresponding ASCII character are ignored.
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* Characters are only returned for key presses, not key releases. A US
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* keyboard layout is assumed (because we can't easily do anything else).
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*/
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char get_key(void);
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#endif // KEYBOARD_H
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