101 lines
3.3 KiB
C
101 lines
3.3 KiB
C
// -*- mode: C; tab-width: 4 ; indent-tabs-mode: nil -*-
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//
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// Universal Keyboard Project
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// ASDF keyboard firmware
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//
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// asdf.h
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//
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// Copyright 2019 David Fenyes
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//
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// This program is free software: you can redistribute it and/or modify it under
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// the terms of the GNU General Public License as published by the Free Software
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// Foundation, either version 3 of the License, or (at your option) any later
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// version.
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//
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// This program is distributed in the hope that it will be useful, but WITHOUT
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// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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// FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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// details.
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//
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// You should have received a copy of the GNU General Public License along with
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// this program. If not, see <https://www.gnu.org/licenses/>.
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//
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#if !defined(ASDF_H)
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#define ASDF_H
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#define ASDF_NUM_ROWS 8
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#define ASDF_NUM_COLS 8
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#define ASDF_ACTION 0x80
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#define ASDF_INVALID_CODE 0x80
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// an action code is not a valid keycode.
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// for efficiency on 8-bit machines, use 8 columns per row. For 16 columns per
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// row, change cols_t to uint16_t and increase ASDF_NUM_COLS.
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typedef uint8_t asdf_cols_t;
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// ASCII keycodes are 7 bits. An 8-bit datatype encodes ASCII, plus a flag for a
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// key function. For longer codes, such as extended ASCII or unicode, change
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// keycode_t appropriately, and also change ASDF_ACTION so that the action key
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// codes (enumerated in action_t) do not conflict with the encoding scheme.
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typedef uint8_t asdf_keycode_t;
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typedef enum {
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ACTION_NOTHING = ASDF_ACTION,
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ACTION_SHIFT = ASDF_ACTION + 0x01,
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ACTION_SHIFT_LOCK = ASDF_ACTION + 0x02,
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ACTION_CAPS = ASDF_ACTION + 0x03,
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ACTION_CTRL = ASDF_ACTION + 0x04,
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ACTION_REPEAT = ASDF_ACTION + 0x05,
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ACTION_LOCAL = ASDF_ACTION + 0x06,
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ACTION_BREAK = ASDF_ACTION + 0x07,
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ACTION_HERE_IS = ASDF_ACTION + 0x08,
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ACTION_CLEAR = ASDF_ACTION + 0x09,
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ACTION_FN_1 = ASDF_ACTION + 0x11,
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ACTION_FN_2 = ASDF_ACTION + 0x12,
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ACTION_FN_3 = ASDF_ACTION + 0x13,
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ACTION_FN_4 = ASDF_ACTION + 0x14,
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ACTION_FN_5 = ASDF_ACTION + 0x15,
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ACTION_FN_6 = ASDF_ACTION + 0x16,
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ACTION_FN_7 = ASDF_ACTION + 0x17,
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ACTION_FN_8 = ASDF_ACTION + 0x18,
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ACTION_FN_9 = ASDF_ACTION + 0x19,
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ACTION_FN_10 = ASDF_ACTION + 0x1a
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} action_t;
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// PROCEDURE: asdf_init
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// INPUTS: none
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// OUTPUTS: none
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// DESCRIPTION: initialize the keyboard state and debounce counters
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void asdf_init(void);
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// PROCEDURE: asdf_keyscan
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// INPUTS: none
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// OUTPUTS: none
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// DESCRIPTION: Scans the key matrix. For each row, read the columns and compare
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// with last stable state. For each changed key, call a key-change handler
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// function. For each stable pressed key, call a "continued press" handler
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// function.
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void asdf_keyscan(void);
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// PROCEDURE: asdf_put_code
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// INPUTS: (asdf_keycode_t) code: code to be buffered for output
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// OUTPUTS: none
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// DESCRIPTION: Takes a keycode argument and buffers for output.
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// NOTES: If buffer is full, silently drop the code.
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void asdf_put_code(asdf_keycode_t code);
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// PROCEDURE: asdf_get_code
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// INPUTS: none
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// OUTPUTS: (asdf_keycode_t) returns next value in buffer.
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// DESCRIPTION: Takes a keycode argument and buffers for output.
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asdf_keycode_t asdf_get_code(void);
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#endif // !defined (ASDF_H)
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//-------|---------|---------+---------+---------+---------+---------+---------+
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// Above line is 80 columns, and should display completely in the editor.
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