2 Copyright 2011 Jun Wako <wakojun@gmail.com>
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation, either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>.
24 #include <util/delay.h>
32 #if (MATRIX_COLS > 16)
33 # error "MATRIX_COLS must not exceed 16"
35 #if (MATRIX_ROWS > 255)
36 # error "MATRIX_ROWS must not exceed 255"
40 static bool is_modified = false;
42 // matrix state buffer(1:on, 0:off)
43 #if (MATRIX_COLS <= 8)
44 static uint8_t matrix[MATRIX_ROWS];
46 static uint16_t matrix[MATRIX_ROWS];
49 #ifdef MATRIX_HAS_GHOST
50 static bool matrix_has_ghost_in_row(uint8_t row);
52 static void register_key(uint8_t key);
56 uint8_t matrix_rows(void)
62 uint8_t matrix_cols(void)
67 void matrix_init(void)
71 // initialize matrix state: all keys off
72 for (uint8_t i=0; i < MATRIX_ROWS; i++) matrix[i] = 0x00;
77 debug_keyboard = true;
79 print("debug enabled.\n");
83 uint8_t matrix_scan(void)
89 codes = adb_host_kbd_recv();
93 if (debug_matrix && codes) {
94 print("adb_host_kbd_recv: "); phex16(codes); print("\n");
97 if (codes == 0) { // no keys
99 } else if (codes == 0x7F7F) { // power key press
101 } else if (codes == 0xFFFF) { // power key release
103 } else if (key0 == 0xFF) { // error
104 if (debug_matrix) print("adb_host_kbd_recv: ERROR(matrix cleared.)\n");
105 // clear matrix to unregister all keys
106 for (uint8_t i=0; i < MATRIX_ROWS; i++) matrix[i] = 0x00;
110 if (key1 != 0xFF) // key1 is 0xFF when no second key.
117 bool matrix_is_modified(void)
123 bool matrix_has_ghost(void)
125 #ifdef MATRIX_HAS_GHOST
126 for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
127 if (matrix_has_ghost_in_row(i))
135 bool matrix_is_on(uint8_t row, uint8_t col)
137 return (matrix[row] & (1<<col));
141 #if (MATRIX_COLS <= 8)
142 uint8_t matrix_get_row(uint8_t row)
144 uint16_t matrix_get_row(uint8_t row)
150 void matrix_print(void)
152 if (!debug_matrix) return;
153 #if (MATRIX_COLS <= 8)
154 print("r/c 01234567\n");
156 print("r/c 0123456789ABCDEF\n");
158 for (uint8_t row = 0; row < matrix_rows(); row++) {
159 phex(row); print(": ");
160 #if (MATRIX_COLS <= 8)
161 pbin_reverse(matrix_get_row(row));
163 pbin_reverse16(matrix_get_row(row));
165 #ifdef MATRIX_HAS_GHOST
166 if (matrix_has_ghost_in_row(row)) {
174 uint8_t matrix_key_count(void)
177 for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
178 #if (MATRIX_COLS <= 8)
179 count += bitpop(matrix[i]);
181 count += bitpop16(matrix[i]);
187 #ifdef MATRIX_HAS_GHOST
189 static bool matrix_has_ghost_in_row(uint8_t row)
191 // no ghost exists in case less than 2 keys on
192 if (((matrix[row] - 1) & matrix[row]) == 0)
195 // ghost exists in case same state as other row
196 for (uint8_t i=0; i < MATRIX_ROWS; i++) {
197 if (i != row && (matrix[i] & matrix[row]) == matrix[row])
205 static void register_key(uint8_t key)
211 matrix[row] &= ~(1<<col);
213 matrix[row] |= (1<<col);