1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
|
/* Copyright 2023 @ Keychron (https://www.keychron.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 "quantum.h"
#define HC595_STCP B0
#define HC595_SHCP A1
#define HC595_DS A7
#define DIRECT_COL_NUM 0
pin_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
pin_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
static inline uint8_t readMatrixPin(pin_t pin) {
if (pin != NO_PIN) {
return readPin(pin);
} else {
return 1;
}
}
static inline void setPinOutput_writeLow(pin_t pin) {
setPinOutput(pin);
writePinLow(pin);
}
static inline void setPinOutput_writeHigh(pin_t pin) {
setPinOutput(pin);
writePinHigh(pin);
}
static inline void HC595_delay(uint16_t n) {
while (n-- > 0) {
asm volatile("nop" ::: "memory");
}
}
static void HC595_output(uint16_t data) {
uint8_t n = 1;
uint8_t i;
for (i = 1; i < (MATRIX_COLS - DIRECT_COL_NUM); i++) {
writePinLow(HC595_SHCP);
if (data & 0x1) {
writePinHigh(HC595_DS);
} else {
writePinLow(HC595_DS);
}
HC595_delay(n);
writePinHigh(HC595_SHCP);
HC595_delay(n);
data = data >> 1;
}
writePinLow(HC595_STCP);
HC595_delay(n);
writePinHigh(HC595_STCP);
}
static void HC595_output_bit(uint16_t data) {
uint8_t n = 1;
writePinLow(HC595_SHCP);
if (data & 0x1) {
writePinHigh(HC595_DS);
} else {
writePinLow(HC595_DS);
}
HC595_delay(n);
writePinHigh(HC595_SHCP);
HC595_delay(n);
writePinLow(HC595_STCP);
HC595_delay(n);
writePinHigh(HC595_STCP);
}
static void select_col(uint8_t col) {
if (col < DIRECT_COL_NUM) {
setPinOutput_writeLow(col_pins[col]);
} else {
if (col == DIRECT_COL_NUM) {
HC595_output_bit(0x00);
}
}
}
static void unselect_col(uint8_t col) {
if (col < DIRECT_COL_NUM) {
#ifdef MATRIX_UNSELECT_DRIVE_HIGH
setPinOutput_writeHigh(col_pins[col]);
#else
setPinInputHigh(col_pins[col]);
#endif
} else {
HC595_output_bit(0x01);
}
}
static void unselect_cols(void) {
for (uint8_t x = 0; x < MATRIX_COLS; x++) {
if (x < DIRECT_COL_NUM) {
#ifdef MATRIX_UNSELECT_DRIVE_HIGH
setPinOutput_writeHigh(col_pins[x]);
#else
setPinInputHigh(col_pins[x]);
#endif
} else {
if (x == DIRECT_COL_NUM) HC595_output(0xFFFF);
break;
}
}
}
void select_all_cols(void) {
for (uint8_t x = 0; x < MATRIX_COLS; x++) {
if (x < DIRECT_COL_NUM) {
setPinOutput_writeLow(col_pins[x]);
} else {
if (x == DIRECT_COL_NUM) HC595_output(0x0000);
break;
}
}
}
static void matrix_read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col, matrix_row_t row_shifter) {
// Select col
select_col(current_col);
HC595_delay(200);
// For each row...
for (uint8_t row_index = 0; row_index < MATRIX_ROWS; row_index++) {
// Check row pin state
if (readMatrixPin(row_pins[row_index]) == 0) {
// Pin LO, set col bit
current_matrix[row_index] |= row_shifter;
} else {
// Pin HI, clear col bit
current_matrix[row_index] &= ~row_shifter;
}
}
// Unselect col
unselect_col(current_col);
HC595_delay(200); // wait for all Row signals to go HIGH
}
void matrix_init_custom(void) {
setPinOutput(HC595_DS);
setPinOutput(HC595_STCP);
setPinOutput(HC595_SHCP);
for (uint8_t x = 0; x < MATRIX_ROWS; x++) {
if (row_pins[x] != NO_PIN) {
setPinInputHigh(row_pins[x]);
}
}
unselect_cols();
}
bool matrix_scan_custom(matrix_row_t current_matrix[]) {
matrix_row_t curr_matrix[MATRIX_ROWS] = {0};
// Set col, read rows
matrix_row_t row_shifter = MATRIX_ROW_SHIFTER;
for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++, row_shifter <<= 1) {
matrix_read_rows_on_col(curr_matrix, current_col, row_shifter);
}
bool changed = memcmp(current_matrix, curr_matrix, sizeof(curr_matrix)) != 0;
if (changed) memcpy(current_matrix, curr_matrix, sizeof(curr_matrix));
return changed;
}
|
