308 lines
7.7 KiB
C
308 lines
7.7 KiB
C
/*
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Copyright 2013 Jun Wako <wakojun@gmail.com>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "host.h"
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#include "report.h"
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#include "debug.h"
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#include "action_util.h"
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#include "timer.h"
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static inline void add_key_byte(uint8_t code);
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static inline void del_key_byte(uint8_t code);
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#ifdef NKRO_ENABLE
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static inline void add_key_bit(uint8_t code);
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static inline void del_key_bit(uint8_t code);
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#endif
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static uint8_t real_mods = 0;
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static uint8_t weak_mods = 0;
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#ifdef USB_6KRO_ENABLE
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#define RO_ADD(a, b) ((a + b) % KEYBOARD_REPORT_KEYS)
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#define RO_SUB(a, b) ((a - b + KEYBOARD_REPORT_KEYS) % KEYBOARD_REPORT_KEYS)
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#define RO_INC(a) RO_ADD(a, 1)
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#define RO_DEC(a) RO_SUB(a, 1)
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static int8_t cb_head = 0;
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static int8_t cb_tail = 0;
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static int8_t cb_count = 0;
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#endif
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// TODO: pointer variable is not needed
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//report_keyboard_t keyboard_report = {};
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report_keyboard_t *keyboard_report = &(report_keyboard_t){};
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#ifndef NO_ACTION_ONESHOT
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static int8_t oneshot_mods = 0;
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#if (defined(ONESHOT_TIMEOUT) && (ONESHOT_TIMEOUT > 0))
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static int16_t oneshot_time = 0;
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#endif
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#endif
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void send_keyboard_report(void) {
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keyboard_report->mods = real_mods;
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keyboard_report->mods |= weak_mods;
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#ifndef NO_ACTION_ONESHOT
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if (oneshot_mods) {
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#if (defined(ONESHOT_TIMEOUT) && (ONESHOT_TIMEOUT > 0))
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if (TIMER_DIFF_16(timer_read(), oneshot_time) >= ONESHOT_TIMEOUT) {
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dprintf("Oneshot: timeout\n");
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clear_oneshot_mods();
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}
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#endif
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keyboard_report->mods |= oneshot_mods;
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if (has_anykey()) {
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clear_oneshot_mods();
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}
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}
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#endif
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host_keyboard_send(keyboard_report);
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}
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/* key */
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void add_key(uint8_t key)
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{
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#ifdef NKRO_ENABLE
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if (keyboard_nkro) {
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add_key_bit(key);
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return;
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}
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#endif
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add_key_byte(key);
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}
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void del_key(uint8_t key)
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{
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#ifdef NKRO_ENABLE
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if (keyboard_nkro) {
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del_key_bit(key);
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return;
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}
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#endif
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del_key_byte(key);
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}
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void clear_keys(void)
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{
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// not clear mods
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for (int8_t i = 1; i < KEYBOARD_REPORT_SIZE; i++) {
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keyboard_report->raw[i] = 0;
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}
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}
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/* modifier */
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uint8_t get_mods(void) { return real_mods; }
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void add_mods(uint8_t mods) { real_mods |= mods; }
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void del_mods(uint8_t mods) { real_mods &= ~mods; }
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void set_mods(uint8_t mods) { real_mods = mods; }
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void clear_mods(void) { real_mods = 0; }
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/* weak modifier */
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uint8_t get_weak_mods(void) { return weak_mods; }
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void add_weak_mods(uint8_t mods) { weak_mods |= mods; }
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void del_weak_mods(uint8_t mods) { weak_mods &= ~mods; }
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void set_weak_mods(uint8_t mods) { weak_mods = mods; }
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void clear_weak_mods(void) { weak_mods = 0; }
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/* Oneshot modifier */
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#ifndef NO_ACTION_ONESHOT
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void set_oneshot_mods(uint8_t mods)
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{
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oneshot_mods = mods;
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#if (defined(ONESHOT_TIMEOUT) && (ONESHOT_TIMEOUT > 0))
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oneshot_time = timer_read();
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#endif
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}
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void clear_oneshot_mods(void)
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{
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oneshot_mods = 0;
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#if (defined(ONESHOT_TIMEOUT) && (ONESHOT_TIMEOUT > 0))
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oneshot_time = 0;
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#endif
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}
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#endif
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/*
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* inspect keyboard state
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*/
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uint8_t has_anykey(void)
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{
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uint8_t cnt = 0;
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for (uint8_t i = 1; i < KEYBOARD_REPORT_SIZE; i++) {
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if (keyboard_report->raw[i])
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cnt++;
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}
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return cnt;
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}
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uint8_t has_anymod(void)
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{
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return bitpop(real_mods);
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}
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uint8_t get_first_key(void)
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{
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#ifdef NKRO_ENABLE
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if (keyboard_nkro) {
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uint8_t i = 0;
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for (; i < KEYBOARD_REPORT_BITS && !keyboard_report->nkro.bits[i]; i++)
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;
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return i<<3 | biton(keyboard_report->nkro.bits[i]);
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}
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#endif
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#ifdef USB_6KRO_ENABLE
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uint8_t i = cb_head;
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do {
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if (keyboard_report->keys[i] != 0) {
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break;
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}
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i = RO_INC(i);
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} while (i != cb_tail);
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return keyboard_report->keys[i];
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#else
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return keyboard_report->keys[0];
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#endif
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}
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/* local functions */
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static inline void add_key_byte(uint8_t code)
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{
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#ifdef USB_6KRO_ENABLE
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int8_t i = cb_head;
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int8_t empty = -1;
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if (cb_count) {
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do {
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if (keyboard_report->keys[i] == code) {
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return;
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}
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if (empty == -1 && keyboard_report->keys[i] == 0) {
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empty = i;
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}
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i = RO_INC(i);
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} while (i != cb_tail);
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if (i == cb_tail) {
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if (cb_tail == cb_head) {
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// buffer is full
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if (empty == -1) {
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// pop head when has no empty space
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cb_head = RO_INC(cb_head);
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cb_count--;
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}
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else {
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// left shift when has empty space
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uint8_t offset = 1;
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i = RO_INC(empty);
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do {
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if (keyboard_report->keys[i] != 0) {
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keyboard_report->keys[empty] = keyboard_report->keys[i];
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keyboard_report->keys[i] = 0;
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empty = RO_INC(empty);
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}
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else {
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offset++;
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}
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i = RO_INC(i);
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} while (i != cb_tail);
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cb_tail = RO_SUB(cb_tail, offset);
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}
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}
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}
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}
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// add to tail
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keyboard_report->keys[cb_tail] = code;
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cb_tail = RO_INC(cb_tail);
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cb_count++;
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#else
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int8_t i = 0;
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int8_t empty = -1;
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for (; i < KEYBOARD_REPORT_KEYS; i++) {
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if (keyboard_report->keys[i] == code) {
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break;
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}
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if (empty == -1 && keyboard_report->keys[i] == 0) {
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empty = i;
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}
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}
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if (i == KEYBOARD_REPORT_KEYS) {
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if (empty != -1) {
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keyboard_report->keys[empty] = code;
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}
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}
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#endif
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}
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static inline void del_key_byte(uint8_t code)
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{
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#ifdef USB_6KRO_ENABLE
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uint8_t i = cb_head;
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if (cb_count) {
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do {
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if (keyboard_report->keys[i] == code) {
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keyboard_report->keys[i] = 0;
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cb_count--;
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if (cb_count == 0) {
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// reset head and tail
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cb_tail = cb_head = 0;
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}
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if (i == RO_DEC(cb_tail)) {
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// left shift when next to tail
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do {
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cb_tail = RO_DEC(cb_tail);
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if (keyboard_report->keys[RO_DEC(cb_tail)] != 0) {
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break;
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}
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} while (cb_tail != cb_head);
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}
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break;
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}
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i = RO_INC(i);
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} while (i != cb_tail);
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}
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#else
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for (uint8_t i = 0; i < KEYBOARD_REPORT_KEYS; i++) {
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if (keyboard_report->keys[i] == code) {
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keyboard_report->keys[i] = 0;
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}
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}
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#endif
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}
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#ifdef NKRO_ENABLE
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static inline void add_key_bit(uint8_t code)
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{
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if ((code>>3) < KEYBOARD_REPORT_BITS) {
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keyboard_report->nkro.bits[code>>3] |= 1<<(code&7);
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} else {
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dprintf("add_key_bit: can't add: %02X\n", code);
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}
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}
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static inline void del_key_bit(uint8_t code)
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{
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if ((code>>3) < KEYBOARD_REPORT_BITS) {
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keyboard_report->nkro.bits[code>>3] &= ~(1<<(code&7));
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} else {
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dprintf("del_key_bit: can't del: %02X\n", code);
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}
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}
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#endif
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