]>
Commit | Line | Data |
---|---|---|
1 | /* | |
2 | Copyright 2014 Robin Haberkorn <robin.haberkorn@googlemail.com> | |
3 | ||
4 | This program is free software: you can redistribute it and/or modify | |
5 | it under the terms of the GNU General Public License as published by | |
6 | the Free Software Foundation, either version 2 of the License, or | |
7 | (at your option) any later version. | |
8 | ||
9 | This program is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | GNU General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU General Public License | |
15 | along with this program. If not, see <http://www.gnu.org/licenses/>. | |
16 | */ | |
17 | ||
18 | #include <stdint.h> | |
19 | #include <avr/io.h> | |
20 | #include <util/delay.h> | |
21 | ||
22 | #include "serial.h" | |
23 | #include "serial_mouse.h" | |
24 | #include "report.h" | |
25 | #include "host.h" | |
26 | #include "timer.h" | |
27 | #include "print.h" | |
28 | #include "debug.h" | |
29 | ||
30 | #ifdef MAX | |
31 | #undef MAX | |
32 | #endif | |
33 | #define MAX(X, Y) ((X) > (Y) ? (X) : (Y)) | |
34 | ||
35 | static void print_usb_data(const report_mouse_t *report); | |
36 | ||
37 | void serial_mouse_task(void) | |
38 | { | |
39 | /* 3 byte ring buffer */ | |
40 | static uint8_t buffer[3]; | |
41 | static int buffer_cur = 0; | |
42 | ||
43 | static report_mouse_t report = {}; | |
44 | ||
45 | int16_t rcv; | |
46 | ||
47 | rcv = serial_recv2(); | |
48 | if (rcv < 0) | |
49 | /* no new data */ | |
50 | return; | |
51 | ||
52 | if (debug_mouse) | |
53 | xprintf("serial_mouse: byte: %04X\n", rcv); | |
54 | ||
55 | /* | |
56 | * If bit 6 is one, this signals the beginning | |
57 | * of a 3 byte sequence/packet. | |
58 | */ | |
59 | if (rcv & (1 << 6)) | |
60 | buffer_cur = 0; | |
61 | ||
62 | buffer[buffer_cur] = (uint8_t)rcv; | |
63 | ||
64 | if (buffer_cur == 0 && buffer[buffer_cur] == 0x20) { | |
65 | /* | |
66 | * Logitech extension: This must be a follow-up on | |
67 | * the last 3-byte packet signaling a middle button click | |
68 | */ | |
69 | report.buttons |= MOUSE_BTN3; | |
70 | report.x = report.y = 0; | |
71 | ||
72 | print_usb_data(&report); | |
73 | host_mouse_send(&report); | |
74 | return; | |
75 | } | |
76 | ||
77 | buffer_cur++; | |
78 | ||
79 | if (buffer_cur < 3) | |
80 | return; | |
81 | buffer_cur = 0; | |
82 | ||
83 | /* | |
84 | * parse 3 byte packet. | |
85 | * NOTE: We only get a complete packet | |
86 | * if the mouse moved or the button states | |
87 | * change. | |
88 | */ | |
89 | report.buttons = 0; | |
90 | if (buffer[0] & (1 << 5)) | |
91 | report.buttons |= MOUSE_BTN1; | |
92 | if (buffer[0] & (1 << 4)) | |
93 | report.buttons |= MOUSE_BTN2; | |
94 | ||
95 | report.x = (buffer[0] << 6) | buffer[1]; | |
96 | report.y = ((buffer[0] << 4) & 0xC0) | buffer[2]; | |
97 | ||
98 | /* USB HID uses values from -127 to 127 only */ | |
99 | report.x = MAX(report.x, -127); | |
100 | report.y = MAX(report.y, -127); | |
101 | ||
102 | #if 0 | |
103 | if (!report.buttons && !report.x && !report.y) { | |
104 | /* | |
105 | * Microsoft extension: Middle mouse button pressed | |
106 | * FIXME: I don't know how exactly this extension works. | |
107 | */ | |
108 | report.buttons |= MOUSE_BTN3; | |
109 | } | |
110 | #endif | |
111 | ||
112 | print_usb_data(&report); | |
113 | host_mouse_send(&report); | |
114 | } | |
115 | ||
116 | static void print_usb_data(const report_mouse_t *report) | |
117 | { | |
118 | if (!debug_mouse) | |
119 | return; | |
120 | ||
121 | xprintf("serial_mouse usb: [%02X|%d %d %d %d]\n", | |
122 | report->buttons, report->x, report->y, | |
123 | report->v, report->h); | |
124 | } |