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cbc5de67 M |
1 | /* |
2 | Copyright 2017 MechMerlin <mechmerlin@gmail.com> | |
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 <util/delay.h> | |
18 | #include <avr/io.h> | |
19 | #include <stdio.h> | |
20 | #include "matrix.h" | |
21 | #include "util.h" | |
22 | #include "print.h" | |
23 | #include "debug.h" | |
24 | ||
25 | static uint8_t debouncing = DEBOUNCING_DELAY; | |
26 | ||
27 | /* matrix state(1:on, 0:off) */ | |
28 | static matrix_row_t matrix[MATRIX_ROWS]; | |
29 | static matrix_row_t matrix_debouncing[MATRIX_ROWS]; | |
30 | ||
31 | static uint8_t read_rows(uint8_t col); | |
32 | static void init_rows(void); | |
33 | static void unselect_cols(void); | |
34 | static void select_col(uint8_t col); | |
35 | ||
cbc5de67 M |
36 | |
37 | __attribute__ ((weak)) | |
38 | void matrix_init_kb(void) { | |
39 | matrix_init_user(); | |
40 | } | |
41 | ||
42 | __attribute__ ((weak)) | |
43 | void matrix_scan_kb(void) { | |
44 | matrix_scan_user(); | |
45 | } | |
46 | ||
47 | __attribute__ ((weak)) | |
48 | void matrix_init_user(void) { | |
49 | } | |
50 | ||
51 | __attribute__ ((weak)) | |
52 | void matrix_scan_user(void) { | |
53 | } | |
54 | ||
55 | void backlight_init_ports(void) | |
56 | { | |
57 | DDRD |= 0b11010000; | |
58 | PORTD &= ~0b01010000; | |
59 | PORTD |= 0b10000000; | |
60 | DDRB |= 0b00011111; | |
61 | PORTB &= ~0b00001110; | |
62 | PORTB |= 0b00010001; | |
63 | DDRE |= 0b01000000; | |
64 | PORTE &= ~0b01000000; | |
65 | } | |
66 | ||
67 | void matrix_init(void) { | |
68 | backlight_init_ports(); | |
69 | unselect_cols(); | |
70 | init_rows(); | |
71 | ||
72 | for (uint8_t i=0; i < MATRIX_ROWS; i++) { | |
73 | matrix[i] = 0; | |
74 | matrix_debouncing[i] = 0; | |
75 | } | |
76 | ||
77 | matrix_init_quantum(); | |
78 | } | |
79 | ||
80 | uint8_t matrix_scan(void) { | |
81 | for (uint8_t col = 0; col < MATRIX_COLS; col++) { | |
82 | select_col(col); | |
83 | _delay_us(3); | |
84 | ||
85 | uint8_t rows = read_rows(col); | |
86 | ||
87 | for (uint8_t row = 0; row < MATRIX_ROWS; row++) { | |
88 | bool prev_bit = matrix_debouncing[row] & ((matrix_row_t)1<<col); | |
89 | bool curr_bit = rows & (1<<row); | |
90 | if (prev_bit != curr_bit) { | |
91 | matrix_debouncing[row] ^= ((matrix_row_t)1<<col); | |
cb2f2fd2 M |
92 | if (debouncing) { |
93 | dprint("bounce!: "); dprintf("%02X", debouncing); dprintln(); | |
94 | } | |
cbc5de67 M |
95 | debouncing = DEBOUNCING_DELAY; |
96 | } | |
97 | } | |
98 | unselect_cols(); | |
99 | } | |
100 | ||
101 | if (debouncing) { | |
102 | if (--debouncing) { | |
103 | _delay_ms(1); | |
104 | } else { | |
105 | for (uint8_t i = 0; i < MATRIX_ROWS; i++) { | |
106 | matrix[i] = matrix_debouncing[i]; | |
107 | } | |
108 | } | |
109 | } | |
110 | ||
111 | matrix_scan_quantum(); | |
112 | return 1; | |
113 | } | |
114 | ||
115 | inline matrix_row_t matrix_get_row(uint8_t row) { | |
116 | return matrix[row]; | |
117 | } | |
118 | ||
119 | void matrix_print(void) { | |
120 | print("\nr/c 0123456789ABCDEF\n"); | |
121 | for (uint8_t row = 0; row < MATRIX_ROWS; row++) { | |
122 | xprintf("%02X: %032lb\n", row, bitrev32(matrix_get_row(row))); | |
123 | } | |
124 | } | |
125 | ||
126 | /* Row pin configuration | |
127 | * row: 0 1 2 3 4 5 | |
128 | * pin: PB7 PD0 PD1 PD2 PD3 PD5 | |
129 | * | |
130 | * Esc uses its own pin PE2 | |
131 | */ | |
132 | static void init_rows(void) { | |
133 | DDRD &= ~0b00101111; | |
134 | PORTD &= ~0b00101111; | |
135 | ||
136 | DDRB &= ~0b10000000; | |
137 | PORTB &= ~0b10000000; | |
138 | ||
139 | DDRE &= ~0b00000100; | |
140 | PORTE |= 0b00000100; | |
141 | } | |
142 | ||
143 | static uint8_t read_rows(uint8_t col) { | |
144 | ||
145 | return (PIND&(1<<0) ? (1<<0) : 0) | | |
146 | (PIND&(1<<1) ? (1<<1) : 0) | | |
147 | (PIND&(1<<2) ? (1<<2) : 0) | | |
148 | (PIND&(1<<3) ? (1<<3) : 0) | | |
149 | (PIND&(1<<5) ? (1<<4) : 0) | | |
150 | (PINB&(1<<7) ? (1<<5) : 0) | | |
151 | (col==0 ? ((PINE&(1<<2) ? 0 : (1<<2))) : 0); | |
152 | ||
153 | } | |
154 | ||
155 | uint8_t read_fwkey(void) | |
156 | { | |
157 | return PINE&(1<<2) ? 0 : (1<<2); | |
158 | } | |
159 | ||
160 | /* Columns 0 - 15 | |
161 | * These columns uses two 74HC237D 3 to 8 bit demultiplexers. | |
162 | * col / pin: PC6 PB6 PF0 PF1 PC7 | |
163 | * 0: 1 0 0 0 0 | |
164 | * 1: 1 0 1 0 0 | |
165 | * 2: 1 0 0 1 0 | |
166 | * 3: 1 0 1 1 0 | |
167 | * 4: 1 0 0 0 1 | |
168 | * 5: 1 0 1 0 1 | |
169 | * 6: 1 0 0 1 1 | |
170 | * 7: 1 0 1 1 1 | |
171 | * 8: 0 1 0 0 0 | |
172 | * 9: 0 1 1 0 0 | |
173 | * 10: 0 1 0 1 0 | |
174 | * 11: 0 1 1 1 0 | |
175 | * 12: 0 1 0 0 1 | |
176 | * 13: 0 1 1 0 1 | |
177 | * 14: 0 1 0 1 1 | |
178 | * 15: 0 1 1 1 1 | |
179 | * | |
180 | */ | |
181 | static void unselect_cols(void) { | |
182 | DDRB |= 0b01000000; | |
183 | PORTB &= ~0b01000000; | |
184 | ||
185 | DDRC |= 0b11000000; | |
186 | PORTC &= ~0b11000000; | |
187 | ||
188 | DDRF |= 0b00000011; | |
189 | PORTF &= ~0b00000011; | |
190 | } | |
191 | ||
192 | static void select_col(uint8_t col) { | |
193 | ||
194 | switch (col) { | |
195 | case 0: | |
196 | PORTC |= 0b01000000; | |
197 | break; | |
198 | case 1: | |
199 | PORTC |= 0b01000000; | |
200 | PORTF |= 0b00000001; | |
201 | break; | |
202 | case 2: | |
203 | PORTC |= 0b01000000; | |
204 | PORTF |= 0b00000010; | |
205 | break; | |
206 | case 3: | |
207 | PORTC |= 0b01000000; | |
208 | PORTF |= 0b00000011; | |
209 | break; | |
210 | case 4: | |
211 | PORTC |= 0b11000000; | |
212 | break; | |
213 | case 5: | |
214 | PORTC |= 0b11000000; | |
215 | PORTF |= 0b00000001; | |
216 | break; | |
217 | case 6: | |
218 | PORTC |= 0b11000000; | |
219 | PORTF |= 0b00000010; | |
220 | break; | |
221 | case 7: | |
222 | PORTC |= 0b11000000; | |
223 | PORTF |= 0b00000011; | |
224 | break; | |
225 | case 8: | |
226 | PORTB |= 0b01000000; | |
227 | break; | |
228 | case 9: | |
229 | PORTB |= 0b01000000; | |
230 | PORTF |= 0b00000001; | |
231 | break; | |
232 | case 10: | |
233 | PORTB |= 0b01000000; | |
234 | PORTF |= 0b00000010; | |
235 | break; | |
236 | case 11: | |
237 | PORTB |= 0b01000000; | |
238 | PORTF |= 0b00000011; | |
239 | break; | |
240 | case 12: | |
241 | PORTB |= 0b01000000; | |
242 | PORTC |= 0b10000000; | |
243 | break; | |
244 | case 13: | |
245 | PORTB |= 0b01000000; | |
246 | PORTF |= 0b00000001; | |
247 | PORTC |= 0b10000000; | |
248 | break; | |
249 | case 14: | |
250 | PORTB |= 0b01000000; | |
251 | PORTF |= 0b00000010; | |
252 | PORTC |= 0b10000000; | |
253 | break; | |
254 | case 15: | |
255 | PORTB |= 0b01000000; | |
256 | PORTF |= 0b00000011; | |
257 | PORTC |= 0b10000000; | |
258 | break; | |
259 | } | |
260 | } |