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keychron_qmk_firmware/common/keyboard.c

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/*
Copyright 2011 Jun Wako <wakojun@gmail.com>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "keyboard.h"
#include "matrix.h"
#include "keymap.h"
#include "host.h"
#include "led.h"
#include "usb_keycodes.h"
#include "timer.h"
#include "print.h"
#include "debug.h"
#include "command.h"
#include "util.h"
#ifdef MOUSEKEY_ENABLE
#include "mousekey.h"
#endif
#ifdef EXTRAKEY_ENABLE
#include <util/delay.h>
#endif
#define LAYER_DELAY 250
typedef enum keykind {
NONE,
FN_DOWN, FN_UP,
FNK_DOWN, FNK_UP,
KEY_DOWN, KEY_UP,
MOD_DOWN, MOD_UP,
MOUSEKEY_DOWN, MOUSEKEY_UP,
DELAY
} keykind_t;
typedef enum { IDLE, DELAYING, WAITING, PRESSING } kbdstate_t;
uint8_t current_layer = 0;
uint8_t default_layer = 0;
/* keyboard internal states */
static kbdstate_t kbdstate = IDLE;
static uint8_t fn_state_bits = 0;
static keyrecord_t delayed_fn;
static keyrecord_t waiting_key;
static const char *state_str(kbdstate_t state)
{
if (state == IDLE) return PSTR("IDLE");
if (state == DELAYING) return PSTR("DELAYING");
if (state == WAITING) return PSTR("WAITING");
if (state == PRESSING) return PSTR("PRESSING");
return PSTR("UNKNOWN");
}
static inline keykind_t get_keykind(uint8_t code, bool pressed)
{
if IS_KEY(code) return (pressed ? KEY_DOWN : KEY_UP);
if IS_MOD(code) return (pressed ? MOD_DOWN : MOD_UP);
if IS_FN(code) {
if (keymap_fn_keycode(FN_INDEX(code)))
return (pressed ? FNK_DOWN : FNK_UP);
else
return (pressed ? FN_DOWN : FN_UP);
}
if IS_MOUSEKEY(code) return (pressed ? MOUSEKEY_DOWN : MOUSEKEY_UP);
return NONE;
}
static void layer_switch_on(uint8_t code)
{
if (!IS_FN(code)) return;
fn_state_bits |= FN_BIT(code);
if (current_layer != keymap_fn_layer(FN_INDEX(code))) {
//TODO: clear all key execpt Mod key
debug("Layer Switch(on): "); debug_hex(current_layer);
current_layer = keymap_fn_layer(FN_INDEX(code));
debug(" -> "); debug_hex(current_layer); debug("\n");
}
}
static void layer_switch_off(uint8_t code)
{
if (!IS_FN(code)) return;
fn_state_bits &= ~FN_BIT(code);
if (current_layer != keymap_fn_layer(biton(fn_state_bits))) {
//TODO: clear all key execpt Mod key
debug("Layer Switch(off): "); debug_hex(current_layer);
current_layer = keymap_fn_layer(biton(fn_state_bits));
debug(" -> "); debug_hex(current_layer); debug("\n");
}
}
static inline uint8_t get_keycode(key_t key)
{
return keymap_get_keycode(current_layer, key.row, key.col);
}
// whether any key except modifier is down or not
static inline bool is_anykey_down(void)
{
for (int r = 0; r < MATRIX_ROWS; r++) {
matrix_row_t matrix_row = matrix_get_row(r);
for (int c = 0; c < MATRIX_COLS; c++) {
if (matrix_row && (1<<c)) {
if (IS_KEY(get_keycode((key_t){ .row = r, .col = c }))) {
return true;
}
}
}
}
return false;
}
static void register_code(uint8_t code)
{
if IS_KEY(code) {
host_add_key(code);
host_send_keyboard_report();
}
else if IS_MOD(code) {
host_add_mod_bit(MOD_BIT(code));
host_send_keyboard_report();
}
else if IS_MOUSEKEY(code) {
mousekey_on(code);
mousekey_send();
}
}
static void unregister_code(uint8_t code)
{
if IS_KEY(code) {
host_del_key(code);
host_send_keyboard_report();
}
else if IS_MOD(code) {
host_del_mod_bit(MOD_BIT(code));
host_send_keyboard_report();
}
else if IS_MOUSEKEY(code) {
mousekey_off(code);
mousekey_send();
}
}
/*
*
* Event/State|IDLE DELAYING[f] WAITING[f,k] PRESSING
* -----------+------------------------------------------------------------------
* Fn Down |IDLE(L+) WAITING(Sk) WAITING(Sk) -
* Up |IDLE(L-) IDLE(L-) IDLE(L-) IDLE(L-)
* Fnk Down |DELAYING(Sf) WAITING(Sk) WAINTING(Sk) PRESSING(Rf)
* Up |IDLE(L-) IDLE(Rf,Uf) IDLE(Rf,Ps,Uf)*3 PRESSING(Uf)
* Key Down |PRESSING(Rk) WAITING(Sk) WAITING(Sk) PRESSING(Rk)
* Up |IDLE(Uk) DELAYING(Uk) IDLE(L+,Ps,Uk) IDLE(Uk)*4
* Delay |- IDLE(L+) IDLE(L+,Ps) -
* |
* No key Down|IDLE(Ld) IDLE(Ld) IDLE(Ld) IDLE(Ld)
*
* *2: register Fnk if any key is pressing
* *3: when Fnk == Stored Fnk, if not ignore.
* *4: when no registered key any more
*
* States:
* IDLE:
* DELAYING: delay layer switch after pressing Fn with alt keycode
* WAITING: key is pressed during DELAYING
*
* Events:
* Fn: Fn key without alternative keycode
* Fnk: Fn key with alternative keycode
* -: ignore
*
* Actions:
* Rk: register key
* Uk: unregister key
* Rf: register stored Fn(alt keycode)
* Uf: unregister stored Fn(alt keycode)
* Rs: register stored key
* Us: unregister stored key
* Sk: store key
* Sf: store Fn
* Ps: play stored key(Interpret stored key and transit state)
* L+: Switch to new layer(*retain* Modifiers only)
* L-: Switch back to last layer(*clear* stored key/Fn, *unregister* all Modifier/key)
* Ld: Switch back to default layer(*clear* stored key/Fn, *unregister* all Modifier/key)
*/
#define NEXT(state) do { \
debug("NEXT: "); print_P(state_str(kbdstate)); \
kbdstate = state; \
debug(" -> "); print_P(state_str(kbdstate)); debug("\n"); \
} while (0)
static inline void process_key(keyevent_t event)
{
/* TODO: ring buffer
static keyrecord_t waiting_keys[5];
static uint8_t waiting_keys_head = 0;
static uint8_t waiting_keys_tail = 0;
*/
uint8_t code = get_keycode(event.key);
keykind_t kind = get_keykind(code, event.pressed);
uint8_t tmp_mods;
debug("state: "); print_P(state_str(kbdstate));
debug(" kind: "); debug_hex(kind);
debug(" code: "); debug_hex(code);
if (event.pressed) { debug("d"); } else { debug("u"); }
debug("\n");
switch (kbdstate) {
case IDLE:
switch (kind) {
case FN_DOWN:
layer_switch_on(code);
break;
case FN_UP:
layer_switch_off(code);
break;
case FNK_DOWN:
// repeat Fn alt key when press Fn key down, up then down again quickly
if (KEYEQ(delayed_fn.event.key, event.key) &&
timer_elapsed(delayed_fn.time) < LAYER_DELAY) {
register_code(keymap_fn_keycode(FN_INDEX(code)));
NEXT(PRESSING);
} else {
delayed_fn = (keyrecord_t) {
.event = event,
.code = code,
.mods = keyboard_report->mods,
.time = timer_read()
};
NEXT(DELAYING);
}
break;
case FNK_UP:
layer_switch_off(code);
break;
case KEY_DOWN:
case MOUSEKEY_DOWN:
register_code(code);
NEXT(PRESSING);
break;
case MOD_DOWN:
register_code(code);
break;
case KEY_UP:
case MOUSEKEY_UP:
case MOD_UP:
unregister_code(code);
break;
default:
break;
}
break;
case PRESSING:
switch (kind) {
case FN_DOWN:
// ignored when any key is pressed
break;
case FN_UP:
layer_switch_off(code);
NEXT(IDLE);
break;
case FNK_DOWN:
register_code(keymap_fn_keycode(FN_INDEX(code)));
break;
case FNK_UP:
unregister_code(keymap_fn_keycode(FN_INDEX(code)));
break;
case KEY_DOWN:
case MOD_DOWN:
case MOUSEKEY_DOWN:
register_code(code);
break;
case KEY_UP:
case MOD_UP:
case MOUSEKEY_UP:
unregister_code(code);
// no key registered? mousekey, mediakey, systemkey
if (!host_has_anykey())
NEXT(IDLE);
break;
default:
break;
}
break;
case DELAYING:
switch (kind) {
case FN_DOWN:
case FNK_DOWN:
case KEY_DOWN:
case MOUSEKEY_DOWN:
waiting_key = (keyrecord_t) {
.event = event,
.code = code,
.mods = keyboard_report->mods,
.time = timer_read()
};
NEXT(WAITING);
break;
case MOD_DOWN:
register_code(code);
break;
case FN_UP:
layer_switch_off(code);
NEXT(IDLE);
break;
case FNK_UP:
if (code == delayed_fn.code) {
// type Fn with alt keycode
// restore the mod status at the time of pressing Fn key
tmp_mods = keyboard_report->mods;
host_set_mods(delayed_fn.mods);
register_code(keymap_fn_keycode(FN_INDEX(delayed_fn.code)));
unregister_code(keymap_fn_keycode(FN_INDEX(delayed_fn.code)));
host_set_mods(tmp_mods);
NEXT(IDLE);
} else {
layer_switch_off(code);
NEXT(IDLE);
}
break;
case KEY_UP:
case MOUSEKEY_UP:
unregister_code(code);
NEXT(IDLE);
break;
case MOD_UP:
unregister_code(code);
break;
default:
break;
}
break;
case WAITING:
switch (kind) {
case FN_DOWN:
case FNK_DOWN:
case KEY_DOWN:
case MOUSEKEY_DOWN:
tmp_mods = keyboard_report->mods;
host_set_mods(delayed_fn.mods);
register_code(keymap_fn_keycode(FN_INDEX(delayed_fn.code)));
host_set_mods(waiting_key.mods);
register_code(waiting_key.code);
host_set_mods(tmp_mods);
register_code(code);
NEXT(IDLE);
break;
case MOD_DOWN:
register_code(code);
break;
case FN_UP:
layer_switch_off(code);
NEXT(IDLE);
break;
case FNK_UP:
if (code == delayed_fn.code) {
// alt down, key down, alt up
tmp_mods = keyboard_report->mods;
host_set_mods(delayed_fn.mods);
register_code(keymap_fn_keycode(FN_INDEX(delayed_fn.code)));
host_set_mods(waiting_key.mods);
register_code(waiting_key.code);
unregister_code(keymap_fn_keycode(FN_INDEX(delayed_fn.code)));
host_set_mods(tmp_mods);
NEXT(IDLE);
} else {
layer_switch_off(code);
NEXT(IDLE);
}
break;
case KEY_UP:
case MOUSEKEY_UP:
if (code == waiting_key.code) {
layer_switch_on(delayed_fn.code);
NEXT(IDLE);
// process waiting_key
tmp_mods = keyboard_report->mods;
host_set_mods(waiting_key.mods);
process_key(waiting_key.event);
host_set_mods(tmp_mods);
process_key(event);
} else {
unregister_code(code);
}
break;
case MOD_UP:
unregister_code(code);
break;
default:
break;
}
break;
}
// TODO: FAIL SAFE: unregister all keys when no key down
}
void keyboard_init(void)
{
debug_keyboard = true;
timer_init();
matrix_init();
#ifdef PS2_MOUSE_ENABLE
ps2_mouse_init();
#endif
}
void keyboard_task(void)
{
static matrix_row_t matrix_prev[MATRIX_ROWS];
matrix_row_t matrix_row = 0;
matrix_row_t matrix_change = 0;
matrix_scan();
if (command_proc()) {
debug("COMMAND\n");
// TODO: clear all keys
host_clear_keyboard_report();
host_send_keyboard_report();
return;
}
for (int r = 0; r < MATRIX_ROWS; r++) {
matrix_row = matrix_get_row(r);
matrix_change = matrix_row ^ matrix_prev[r];
if (matrix_change) {
// TODO: print once per scan
if (debug_matrix) matrix_print();
for (int c = 0; c < MATRIX_COLS; c++) {
if (matrix_change & (1<<c)) {
process_key((keyevent_t){
.key = (key_t){ .row = r, .col = c },
.pressed = (matrix_row & (1<<c))
});
// record a processed key
matrix_prev[r] ^= (1<<c);
// process a key per task call
goto MATRIX_LOOP_END;
}
}
}
}
MATRIX_LOOP_END:
// TODO: FAIL SAFE: clear all key if no key down
// layer switch when delay term elapses
if (kbdstate == DELAYING || kbdstate == WAITING) {
if (timer_elapsed(delayed_fn.time) > LAYER_DELAY) {
if (kbdstate == DELAYING) {
layer_switch_on(delayed_fn.code);
NEXT(IDLE);
}
if (kbdstate == WAITING) {
layer_switch_on(delayed_fn.code);
NEXT(IDLE);
uint8_t tmp_mods = keyboard_report->mods;
host_set_mods(waiting_key.mods);
process_key(waiting_key.event);
host_set_mods(tmp_mods);
}
}
}
// mousekey repeat & acceleration
mousekey_task();
return;
}
void keyboard_set_leds(uint8_t leds)
{
led_set(leds);
}
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