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
|
/*
Copyright 2011,2013 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/>.
*/
#include <stdbool.h>
#include <avr/io.h>
#include <util/delay.h>
#include "ps2_mouse.h"
#include "host.h"
#include "timer.h"
#include "print.h"
#include "report.h"
#include "debug.h"
#include "ps2.h"
/* ============================= MACROS ============================ */
static report_mouse_t mouse_report = {};
static inline void ps2_mouse_print_report(report_mouse_t *mouse_report);
static inline void ps2_mouse_convert_report_to_hid(report_mouse_t *mouse_report);
static inline void ps2_mouse_clear_report(report_mouse_t *mouse_report);
static inline void ps2_mouse_enable_scrolling(void);
static inline void ps2_mouse_scroll_button_task(report_mouse_t *mouse_report);
/* ============================= IMPLEMENTATION ============================ */
/* supports only 3 button mouse at this time */
void ps2_mouse_init(void) {
ps2_host_init();
_delay_ms(PS2_MOUSE_INIT_DELAY); // wait for powering up
PS2_MOUSE_SEND(PS2_MOUSE_RESET, "ps2_mouse_init: sending reset");
PS2_MOUSE_RECEIVE("ps2_mouse_init: read BAT");
PS2_MOUSE_RECEIVE("ps2_mouse_init: read DevID");
#ifdef PS2_MOUSE_USE_REMOTE_MODE
ps2_mouse_set_remote_mode();
#else
ps2_mouse_enable_data_reporting();
#endif
#ifdef PS2_MOUSE_ENABLE_SCROLLING
ps2_mouse_enable_scrolling();
#endif
#ifdef PS2_MOUSE_USE_2_1_SCALING
ps2_mouse_set_scaling_2_1();
#endif
ps2_mouse_init_user();
}
__attribute__((weak)) void ps2_mouse_init_user(void) {}
void ps2_mouse_task(void) {
static uint8_t buttons_prev = 0;
extern int tp_buttons;
/* receives packet from mouse */
uint8_t rcv;
rcv = ps2_host_send(PS2_MOUSE_READ_DATA);
if (rcv == PS2_ACK) {
mouse_report.buttons = ps2_host_recv_response() | tp_buttons;
mouse_report.x = ps2_host_recv_response() * PS2_MOUSE_X_MULTIPLIER;
mouse_report.y = ps2_host_recv_response() * PS2_MOUSE_Y_MULTIPLIER;
#ifdef PS2_MOUSE_ENABLE_SCROLLING
mouse_report.v = -(ps2_host_recv_response() & PS2_MOUSE_SCROLL_MASK) * PS2_MOUSE_V_MULTIPLIER;
#endif
} else {
if (debug_mouse) print("ps2_mouse: fail to get mouse packet\n");
return;
}
/* if mouse moves or buttons state changes */
if (mouse_report.x || mouse_report.y || mouse_report.v || ((mouse_report.buttons ^ buttons_prev) & PS2_MOUSE_BTN_MASK)) {
#ifdef PS2_MOUSE_DEBUG_RAW
// Used to debug raw ps2 bytes from mouse
ps2_mouse_print_report(&mouse_report);
#endif
buttons_prev = mouse_report.buttons;
ps2_mouse_convert_report_to_hid(&mouse_report);
#if PS2_MOUSE_SCROLL_BTN_MASK
ps2_mouse_scroll_button_task(&mouse_report);
#endif
#ifdef PS2_MOUSE_DEBUG_HID
// Used to debug the bytes sent to the host
ps2_mouse_print_report(&mouse_report);
#endif
host_mouse_send(&mouse_report);
}
ps2_mouse_clear_report(&mouse_report);
}
void ps2_mouse_disable_data_reporting(void) { PS2_MOUSE_SEND(PS2_MOUSE_DISABLE_DATA_REPORTING, "ps2 mouse disable data reporting"); }
void ps2_mouse_enable_data_reporting(void) { PS2_MOUSE_SEND(PS2_MOUSE_ENABLE_DATA_REPORTING, "ps2 mouse enable data reporting"); }
void ps2_mouse_set_remote_mode(void) {
PS2_MOUSE_SEND_SAFE(PS2_MOUSE_SET_REMOTE_MODE, "ps2 mouse set remote mode");
ps2_mouse_mode = PS2_MOUSE_REMOTE_MODE;
}
void ps2_mouse_set_stream_mode(void) {
PS2_MOUSE_SEND_SAFE(PS2_MOUSE_SET_STREAM_MODE, "ps2 mouse set stream mode");
ps2_mouse_mode = PS2_MOUSE_STREAM_MODE;
}
void ps2_mouse_set_scaling_2_1(void) { PS2_MOUSE_SEND_SAFE(PS2_MOUSE_SET_SCALING_2_1, "ps2 mouse set scaling 2:1"); }
void ps2_mouse_set_scaling_1_1(void) { PS2_MOUSE_SEND_SAFE(PS2_MOUSE_SET_SCALING_1_1, "ps2 mouse set scaling 1:1"); }
void ps2_mouse_set_resolution(ps2_mouse_resolution_t resolution) { PS2_MOUSE_SET_SAFE(PS2_MOUSE_SET_RESOLUTION, resolution, "ps2 mouse set resolution"); }
void ps2_mouse_set_sample_rate(ps2_mouse_sample_rate_t sample_rate) { PS2_MOUSE_SET_SAFE(PS2_MOUSE_SET_SAMPLE_RATE, sample_rate, "ps2 mouse set sample rate"); }
/* ============================= HELPERS ============================ */
#define X_IS_NEG (mouse_report->buttons & (1 << PS2_MOUSE_X_SIGN))
#define Y_IS_NEG (mouse_report->buttons & (1 << PS2_MOUSE_Y_SIGN))
#define X_IS_OVF (mouse_report->buttons & (1 << PS2_MOUSE_X_OVFLW))
#define Y_IS_OVF (mouse_report->buttons & (1 << PS2_MOUSE_Y_OVFLW))
static inline void ps2_mouse_convert_report_to_hid(report_mouse_t *mouse_report) {
// PS/2 mouse data is '9-bit integer'(-256 to 255) which is comprised of sign-bit and 8-bit value.
// bit: 8 7 ... 0
// sign \8-bit/
//
// Meanwhile USB HID mouse indicates 8bit data(-127 to 127), note that -128 is not used.
//
// This converts PS/2 data into HID value. Use only -127-127 out of PS/2 9-bit.
mouse_report->x = X_IS_NEG ? ((!X_IS_OVF && -127 <= mouse_report->x && mouse_report->x <= -1) ? mouse_report->x : -127) : ((!X_IS_OVF && 0 <= mouse_report->x && mouse_report->x <= 127) ? mouse_report->x : 127);
mouse_report->y = Y_IS_NEG ? ((!Y_IS_OVF && -127 <= mouse_report->y && mouse_report->y <= -1) ? mouse_report->y : -127) : ((!Y_IS_OVF && 0 <= mouse_report->y && mouse_report->y <= 127) ? mouse_report->y : 127);
// remove sign and overflow flags
mouse_report->buttons &= PS2_MOUSE_BTN_MASK;
#ifdef PS2_MOUSE_INVERT_X
mouse_report->x = -mouse_report->x;
#endif
#ifndef PS2_MOUSE_INVERT_Y // NOTE if not!
// invert coordinate of y to conform to USB HID mouse
mouse_report->y = -mouse_report->y;
#endif
#ifdef PS2_MOUSE_ROTATE
int8_t x = mouse_report->x;
int8_t y = mouse_report->y;
# if PS2_MOUSE_ROTATE == 90
mouse_report->x = y;
mouse_report->y = -x;
# elif PS2_MOUSE_ROTATE == 180
mouse_report->x = -x;
mouse_report->y = -y;
# elif PS2_MOUSE_ROTATE == 270
mouse_report->x = -y;
mouse_report->y = x;
# endif
#endif
}
static inline void ps2_mouse_clear_report(report_mouse_t *mouse_report) {
mouse_report->x = 0;
mouse_report->y = 0;
mouse_report->v = 0;
mouse_report->h = 0;
mouse_report->buttons = 0;
}
static inline void ps2_mouse_print_report(report_mouse_t *mouse_report) {
if (!debug_mouse) return;
print("ps2_mouse: [");
phex(mouse_report->buttons);
print("|");
print_hex8((uint8_t)mouse_report->x);
print(" ");
print_hex8((uint8_t)mouse_report->y);
print(" ");
print_hex8((uint8_t)mouse_report->v);
print(" ");
print_hex8((uint8_t)mouse_report->h);
print("]\n");
}
static inline void ps2_mouse_enable_scrolling(void) {
PS2_MOUSE_SEND(PS2_MOUSE_SET_SAMPLE_RATE, "Initiaing scroll wheel enable: Set sample rate");
PS2_MOUSE_SEND(200, "200");
PS2_MOUSE_SEND(PS2_MOUSE_SET_SAMPLE_RATE, "Set sample rate");
PS2_MOUSE_SEND(100, "100");
PS2_MOUSE_SEND(PS2_MOUSE_SET_SAMPLE_RATE, "Set sample rate");
PS2_MOUSE_SEND(80, "80");
PS2_MOUSE_SEND(PS2_MOUSE_GET_DEVICE_ID, "Finished enabling scroll wheel");
_delay_ms(20);
}
#define PRESS_SCROLL_BUTTONS mouse_report->buttons |= (PS2_MOUSE_SCROLL_BTN_MASK)
#define RELEASE_SCROLL_BUTTONS mouse_report->buttons &= ~(PS2_MOUSE_SCROLL_BTN_MASK)
static inline void ps2_mouse_scroll_button_task(report_mouse_t *mouse_report) {
static enum {
SCROLL_NONE,
SCROLL_BTN,
SCROLL_SENT,
} scroll_state = SCROLL_NONE;
static uint16_t scroll_button_time = 0;
if (PS2_MOUSE_SCROLL_BTN_MASK == (mouse_report->buttons & (PS2_MOUSE_SCROLL_BTN_MASK))) {
// All scroll buttons are pressed
if (scroll_state == SCROLL_NONE) {
scroll_button_time = timer_read();
scroll_state = SCROLL_BTN;
}
// If the mouse has moved, update the report to scroll instead of move the mouse
if (mouse_report->x || mouse_report->y) {
scroll_state = SCROLL_SENT;
mouse_report->v = -mouse_report->y / (PS2_MOUSE_SCROLL_DIVISOR_V);
mouse_report->h = mouse_report->x / (PS2_MOUSE_SCROLL_DIVISOR_H);
mouse_report->x = 0;
mouse_report->y = 0;
#ifdef PS2_MOUSE_INVERT_H
mouse_report->h = -mouse_report->h;
#endif
#ifdef PS2_MOUSE_INVERT_V
mouse_report->v = -mouse_report->v;
#endif
}
} else if (0 == (PS2_MOUSE_SCROLL_BTN_MASK & mouse_report->buttons)) {
// None of the scroll buttons are pressed
#if PS2_MOUSE_SCROLL_BTN_SEND
if (scroll_state == SCROLL_BTN && timer_elapsed(scroll_button_time) < PS2_MOUSE_SCROLL_BTN_SEND) {
PRESS_SCROLL_BUTTONS;
host_mouse_send(mouse_report);
_delay_ms(100);
RELEASE_SCROLL_BUTTONS;
}
#endif
scroll_state = SCROLL_NONE;
}
RELEASE_SCROLL_BUTTONS;
}
|
