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-rw-r--r--keyboards/keychron/q2/matrix.c139
1 files changed, 0 insertions, 139 deletions
diff --git a/keyboards/keychron/q2/matrix.c b/keyboards/keychron/q2/matrix.c
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1/* Copyright 2021 @ Keychron (https://www.keychron.com)
2 *
3 * This program is free software: you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License as published by
5 * the Free Software Foundation, either version 2 of the License, or
6 * (at your option) any later version.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this program. If not, see <http://www.gnu.org/licenses/>.
15 */
16
17#include <stdint.h>
18#include <stdbool.h>
19#include <string.h>
20#include "util.h"
21#include "matrix.h"
22#include "debounce.h"
23#include "quantum.h"
24
25#ifdef MATRIX_ROW_PINS
26static pin_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
27#endif // MATRIX_ROW_PINS
28#ifdef MATRIX_COL_PINS
29static pin_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
30#endif // MATRIX_COL_PINS
31
32#define ROWS_PER_HAND (MATRIX_ROWS)
33
34/* matrix state(1:on, 0:off) */
35extern matrix_row_t raw_matrix[MATRIX_ROWS]; // raw values
36extern matrix_row_t matrix[MATRIX_ROWS]; // debounced values
37
38static inline void setPinOutput_writeLow(pin_t pin) {
39 ATOMIC_BLOCK_FORCEON {
40 setPinOutput(pin);
41 writePinLow(pin);
42 }
43}
44
45static inline void setPinOutput_writeHigh(pin_t pin) {
46 ATOMIC_BLOCK_FORCEON {
47 setPinOutput(pin);
48 writePinHigh(pin);
49 }
50}
51
52static inline void setPinInputHigh_atomic(pin_t pin) {
53 ATOMIC_BLOCK_FORCEON { setPinInputHigh(pin); }
54}
55
56static inline uint8_t readMatrixPin(pin_t pin) {
57 if (pin != NO_PIN) {
58 return readPin(pin);
59 } else {
60 return 1;
61 }
62}
63
64static bool select_col(uint8_t col) {
65 pin_t pin = col_pins[col];
66 if (pin != NO_PIN) {
67 setPinOutput_writeLow(pin);
68 return true;
69 }
70 return false;
71}
72
73static void unselect_col(uint8_t col) {
74 pin_t pin = col_pins[col];
75 if (pin != NO_PIN) {
76 setPinOutput_writeHigh(pin);
77 }
78}
79
80static void unselect_cols(void) {
81 for (uint8_t x = 0; x < MATRIX_COLS; x++) {
82 unselect_col(x);
83 }
84}
85
86void matrix_init_pins(void) {
87 unselect_cols();
88 for (uint8_t x = 0; x < ROWS_PER_HAND; x++) {
89 if (row_pins[x] != NO_PIN) {
90 setPinInputHigh_atomic(row_pins[x]);
91 }
92 }
93}
94
95void matrix_read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col) {
96 bool key_pressed = false;
97
98 // Select col
99 if (!select_col(current_col)) { // select col
100 return; // skip NO_PIN col
101 }
102 matrix_output_select_delay();
103
104 // For each row...
105 for (uint8_t row_index = 0; row_index < ROWS_PER_HAND; row_index++) {
106 // Check row pin state
107 if (readMatrixPin(row_pins[row_index]) == 0) {
108 // Pin LO, set col bit
109 current_matrix[row_index] |= (MATRIX_ROW_SHIFTER << current_col);
110 key_pressed = true;
111 } else {
112 // Pin HI, clear col bit
113 current_matrix[row_index] &= ~(MATRIX_ROW_SHIFTER << current_col);
114 }
115 }
116
117 // Unselect col
118 unselect_col(current_col);
119 matrix_output_unselect_delay(current_col, key_pressed); // wait for all Row signals to go HIGH
120}
121
122void matrix_init_custom(void) {
123 // initialize key pins
124 matrix_init_pins();
125}
126
127bool matrix_scan_custom(matrix_row_t current_matrix[]) {
128 matrix_row_t curr_matrix[MATRIX_ROWS] = {0};
129
130 // Set col, read rows
131 for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) {
132 matrix_read_rows_on_col(curr_matrix, current_col);
133 }
134
135 bool changed = memcmp(current_matrix, curr_matrix, sizeof(curr_matrix)) != 0;
136 if (changed) memcpy(current_matrix, curr_matrix, sizeof(curr_matrix));
137
138 return (uint8_t)changed;
139}