summaryrefslogtreecommitdiffstats
path: root/keyboards/converter/adb_usb/matrix.c
blob: 9e5399de5d6b9f510a003e98d96617683e175060 (plain)
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
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
/*
Copyright 2011 Jun Wako <wakojun@gmail.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/>.

Ported to QMK by Peter Roe <pete@13bit.me>
*/

#include <stdint.h>
#include <stdbool.h>
#include <avr/io.h>
#include <util/delay.h>
#include "print.h"
#include "util.h"
#include "debug.h"
#include "adb.h"
#include "matrix.h"
#include "report.h"
#include "host.h"
#include "led.h"
#include "timer.h"

static bool is_iso_layout = false;

// matrix state buffer(1:on, 0:off)
static matrix_row_t matrix[MATRIX_ROWS];

static void register_key(uint8_t key);

__attribute__ ((weak))
void matrix_init_kb(void) {
    matrix_init_user();
}

__attribute__ ((weak))
void matrix_scan_kb(void) {
    matrix_scan_user();
}

__attribute__ ((weak))
void matrix_init_user(void) {
}

__attribute__ ((weak))
void matrix_scan_user(void) {
}

void matrix_init(void)
{
    adb_host_init();

    // wait for keyboard to boot up and receive command
    _delay_ms(2000);

    // initialize matrix state: all keys off
    for (uint8_t i=0; i < MATRIX_ROWS; i++) matrix[i] = 0x00;

    // debug_enable = true;
    // debug_matrix = true;
    // debug_keyboard = true;
    // debug_mouse = true;
    // print("debug enabled.\n");

    matrix_init_quantum();
}

#ifdef ADB_MOUSE_ENABLE

#ifdef MAX
#undef MAX
#endif
#define MAX(X, Y) ((X) > (Y) ? (X) : (Y))

static report_mouse_t mouse_report = {};

void adb_mouse_task(void)
{
    uint16_t codes;
    int16_t x, y;
    static int8_t mouseacc;

    /* tick of last polling */
    static uint16_t tick_ms;

    // polling with 12ms interval
    if (timer_elapsed(tick_ms) < 12) return;
    tick_ms = timer_read();

    codes = adb_host_mouse_recv();
    // If nothing received reset mouse acceleration, and quit.
    if (!codes) {
        mouseacc = 1;
        return;
    };
    // Bit sixteen is button.
    if (~codes & (1 << 15))
        mouse_report.buttons |= MOUSE_BTN1;
    if (codes & (1 << 15))
        mouse_report.buttons &= ~MOUSE_BTN1;
    // lower seven bits are movement, as signed int_7.
    // low byte is X-axis, high byte is Y.
    y = (codes>>8 & 0x3F);
    x = (codes>>0 & 0x3F);
    // bit seven and fifteen is negative
    // usb does not use int_8, but int_7 (measuring distance) with sign-bit.
    if (codes & (1 << 6))
          x = (x-0x40);
    if (codes & (1 << 14))
         y = (y-0x40);
    // Accelerate mouse. (They weren't meant to be used on screens larger than 320x200).
    x *= mouseacc;
    y *= mouseacc;
    // Cap our two bytes per axis to one byte.
    // Easier with a MIN-function, but since -MAX(-a,-b) = MIN(a,b)...
	 // I.E. MIN(MAX(x,-127),127) = -MAX(-MAX(x, -127), -127) = MIN(-MIN(-x,127),127)
    mouse_report.x = -MAX(-MAX(x, -127), -127);
    mouse_report.y = -MAX(-MAX(y, -127), -127);
    if (debug_mouse) {
            print("adb_host_mouse_recv: "); print_bin16(codes); print("\n");
            print("adb_mouse raw: [");
            print_hex8(mouseacc); print(" ");
            print_hex8(mouse_report.buttons); print("|");
            print_decs(mouse_report.x); print(" ");
            print_decs(mouse_report.y); print("]\n");
    }
    // Send result by usb.
    host_mouse_send(&mouse_report);
    // increase acceleration of mouse
    mouseacc += ( mouseacc < ADB_MOUSE_MAXACC ? 1 : 0 );
    return;
}
#endif

uint8_t matrix_scan(void)
{
    /* extra_key is volatile and more convoluted than necessary because gcc refused
    to generate valid code otherwise. Making extra_key uint8_t and constructing codes
    here via codes = extra_key<<8 | 0xFF; would consistently fail to even LOAD
    extra_key from memory, and leave garbage in the high byte of codes. I tried
    dozens of code variations and it kept generating broken assembly output. So
    beware if attempting to make extra_key code more logical and efficient. */
    static volatile uint16_t extra_key = 0xFFFF;
    uint16_t codes;
    uint8_t key0, key1;

    /* tick of last polling */
    static uint16_t tick_ms;

    codes = extra_key;
    extra_key = 0xFFFF;

    if ( codes == 0xFFFF )
    {
        // polling with 12ms interval
        if (timer_elapsed(tick_ms) < 12) return 0;
        tick_ms = timer_read();

        codes = adb_host_kbd_recv();
    }

    key0 = codes>>8;
    key1 = codes&0xFF;

    if (debug_matrix && codes) {
        print("adb_host_kbd_recv: "); print_hex16(codes); print("\n");
    }

    if (codes == 0) {                           // no keys
        return 0;
    } else if (codes == 0x7F7F) {   // power key press
        register_key(0x7F);
    } else if (codes == 0xFFFF) {   // power key release
        register_key(0xFF);
    } else if (key0 == 0xFF) {      // error
        xprintf("adb_host_kbd_recv: ERROR(%d)\n", codes);
        // something wrong or plug-in
        matrix_init();
        return key1;
    } else {
        /* Swap codes for ISO keyboard
         * https://github.com/tmk/tmk_keyboard/issues/35
         *
         * ANSI
         * ,-----------    ----------.
         * | *a|  1|  2     =|Backspa|
         * |-----------    ----------|
         * |Tab  |  Q|     |  ]|   *c|
         * |-----------    ----------|
         * |CapsLo|  A|    '|Return  |
         * |-----------    ----------|
         * |Shift   |      Shift     |
         * `-----------    ----------'
         *
         * ISO
         * ,-----------    ----------.
         * | *a|  1|  2     =|Backspa|
         * |-----------    ----------|
         * |Tab  |  Q|     |  ]|Retur|
         * |-----------    -----`    |
         * |CapsLo|  A|    '| *c|    |
         * |-----------    ----------|
         * |Shif| *b|      Shift     |
         * `-----------    ----------'
         *
         *         ADB scan code   USB usage
         *         -------------   ---------
         * Key     ANSI    ISO     ANSI    ISO
         * ---------------------------------------------
         * *a      0x32    0x0A    0x35    0x35
         * *b      ----    0x32    ----    0x64
         * *c      0x2A    0x2A    0x31    0x31(or 0x32)
         */
        if (is_iso_layout) {
            if ((key0 & 0x7F) == 0x32) {
                key0 = (key0 & 0x80) | 0x0A;
            } else if ((key0 & 0x7F) == 0x0A) {
                key0 = (key0 & 0x80) | 0x32;
            }
        }
        register_key(key0);
        if (key1 != 0xFF)       // key1 is 0xFF when no second key.
            extra_key = key1<<8 | 0xFF; // process in a separate call
    }

    matrix_scan_quantum();
    return 1;
}

void matrix_print(void){

}

inline
matrix_row_t matrix_get_row(uint8_t row)
{
    return matrix[row];
}

inline
static void register_key(uint8_t key)
{
    uint8_t col, row;
    col = key&0x07;
    row = (key>>3)&0x0F;
    if (key&0x80) {
        matrix[row] &= ~(1<<col);
    } else {
        matrix[row] |=  (1<<col);
    }
}