2 Copyright 2012 Jun Wako <wakojun@gmail.com>
3 Copyright 2017 Cole Markham <cole@ccmcomputing.net>
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation, either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
41 static uint16_t debouncing_time;
42 static bool debouncing = false;
45 #if (MATRIX_COLS <= 8)
46 # define print_matrix_header() print("\nr/c 01234567\n")
47 # define print_matrix_row(row) print_bin_reverse8(matrix_get_row(row))
48 # define matrix_bitpop(i) bitpop(matrix[i])
49 # define ROW_SHIFTER ((uint8_t)1)
50 #elif (MATRIX_COLS <= 16)
51 # define print_matrix_header() print("\nr/c 0123456789ABCDEF\n")
52 # define print_matrix_row(row) print_bin_reverse16(matrix_get_row(row))
53 # define matrix_bitpop(i) bitpop16(matrix[i])
54 # define ROW_SHIFTER ((uint16_t)1)
55 #elif (MATRIX_COLS <= 32)
56 # define print_matrix_header() print("\nr/c 0123456789ABCDEF0123456789ABCDEF\n")
57 # define print_matrix_row(row) print_bin_reverse32(matrix_get_row(row))
58 # define matrix_bitpop(i) bitpop32(matrix[i])
59 # define ROW_SHIFTER ((uint32_t)1)
62 static matrix_row_t matrix_debouncing[MATRIX_ROWS];
64 static const uint8_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
65 static const uint8_t col_pins[4] = MATRIX_COL_PINS;
66 //static const uint8_t lrow_pins[MATRIX_ROWS] = LED_ROW_PINS;
67 //static const uint8_t lcol_pins[4] = LED_COL_PINS;
69 /* matrix state(1:on, 0:off) */
70 static matrix_row_t matrix[MATRIX_ROWS];
71 static matrix_row_t matrix_debouncing[MATRIX_ROWS];
72 static void init_rows(void);
73 //static void init_lcols(void);
74 static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col);
75 static void unselect_cols(void);
76 static void select_col(uint8_t col);
79 __attribute__ ((weak))
80 void matrix_init_kb(void) {
84 __attribute__ ((weak))
85 void matrix_scan_kb(void) {
89 __attribute__ ((weak))
90 void matrix_init_user(void) {
93 __attribute__ ((weak))
94 void matrix_scan_user(void) {
98 uint8_t matrix_rows(void)
104 uint8_t matrix_cols(void)
109 void matrix_init(void)
114 // initialize row and col
119 // initialize matrix state: all keys off
120 for (uint8_t i=0; i < MATRIX_ROWS; i++) {
122 matrix_debouncing[i] = 0;
125 matrix_init_quantum();
129 uint8_t _matrix_scan(void)
131 // Set col, read rows
132 for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) {
134 bool matrix_changed = read_rows_on_col(matrix_debouncing, current_col);
135 if (matrix_changed) {
137 debouncing_time = timer_read();
140 read_rows_on_col(matrix, current_col);
146 if (debouncing && (timer_elapsed(debouncing_time) > DEBOUNCE)) {
147 for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
148 matrix[i] = matrix_debouncing[i];
157 uint8_t matrix_scan(void)
159 uint8_t ret = _matrix_scan();
160 matrix_scan_quantum();
164 bool matrix_is_modified(void)
166 if (debouncing) return false;
171 bool matrix_is_on(uint8_t row, uint8_t col)
173 return (matrix[row] & ((matrix_row_t)1<<col));
177 matrix_row_t matrix_get_row(uint8_t row)
182 void matrix_print(void)
184 print("\nr/c 0123456789ABCDEF\n");
185 for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
186 phex(row); print(": ");
187 pbin_reverse16(matrix_get_row(row));
192 uint8_t matrix_key_count(void)
195 for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
196 count += bitpop16(matrix[i]);
202 static void init_rows(void)
204 for(uint8_t x = 0; x < MATRIX_ROWS; x++) {
205 uint8_t pin = row_pins[x];
206 _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
207 _SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
212 static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col)
214 bool matrix_changed = false;
216 // Select col and wait for col selection to stabilize
217 select_col(current_col);
221 for(uint8_t row_index = 0; row_index < MATRIX_ROWS; row_index++)
224 // Store last value of row prior to reading
225 matrix_row_t last_row_value = current_matrix[row_index];
227 // Check row pin state
228 if ((_SFR_IO8(row_pins[row_index] >> 4) & _BV(row_pins[row_index] & 0xF)) == 0)
230 // Pin LO, set col bit
231 current_matrix[row_index] |= (ROW_SHIFTER << current_col);
235 // Pin HI, clear col bit
236 current_matrix[row_index] &= ~(ROW_SHIFTER << current_col);
239 // Determine if the matrix changed state
240 if ((last_row_value != current_matrix[row_index]) && !(matrix_changed))
242 matrix_changed = true;
249 return matrix_changed;
252 static void select_col(uint8_t col)
255 col = MATRIX_COLS - col - 1;
257 for(uint8_t x = 0; x < 4; x++) {
258 uint8_t pin = col_pins[x];
259 _SFR_IO8((pin >> 4) + 1) |= _BV(pin & 0xF); // OUT
260 if (((col >> x) & 0x1) == 1){
261 _SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HIGH
263 _SFR_IO8((pin >> 4) + 2) &= ~_BV(pin & 0xF); // LOW
268 static void unselect_cols(void)
270 // FIXME This really needs to use the global enable on the decoder, because currently this sets the value to col1
271 for(uint8_t x = 0; x < 4; x++) {
272 uint8_t pin = col_pins[x];
273 _SFR_IO8((pin >> 4) + 1) |= _BV(pin & 0xF); // OUT
274 _SFR_IO8((pin >> 4) + 2) &= ~_BV(pin & 0xF); // LOW