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
|
/*
* The MIT License (MIT)
*
* Copyright (c) 2019 Ha Thach (tinyusb.org)
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
* This file is part of the TinyUSB stack.
*/
//--------------------------------------------------------------------+
// INCLUDE
//--------------------------------------------------------------------+
#include "keyboard_host_app.h"
#include "app_os_prio.h"
#if CFG_TUH_HID_KEYBOARD
//--------------------------------------------------------------------+
// MACRO CONSTANT TYPEDEF
//--------------------------------------------------------------------+
#define QUEUE_KEYBOARD_REPORT_DEPTH 4
//--------------------------------------------------------------------+
// INTERNAL OBJECT & FUNCTION DECLARATION
//--------------------------------------------------------------------+
static osal_queue_t queue_kbd_hdl;
CFG_TUSB_MEM_SECTION static hid_keyboard_report_t usb_keyboard_report;
static inline uint8_t keycode_to_ascii(uint8_t modifier, uint8_t keycode);
static inline void process_kbd_report(hid_keyboard_report_t const * report);
//--------------------------------------------------------------------+
// tinyusb callbacks
//--------------------------------------------------------------------+
void tuh_hid_keyboard_mounted_cb(uint8_t dev_addr)
{
// application set-up
printf("\na Keyboard device (address %d) is mounted\n", dev_addr);
osal_queue_flush(queue_kbd_hdl);
tuh_hid_keyboard_get_report(dev_addr, (uint8_t*) &usb_keyboard_report); // first report
}
void tuh_hid_keyboard_unmounted_cb(uint8_t dev_addr)
{
// application tear-down
printf("\na Keyboard device (address %d) is unmounted\n", dev_addr);
}
// invoked ISR context
void tuh_hid_keyboard_isr(uint8_t dev_addr, xfer_result_t event)
{
switch(event)
{
case XFER_RESULT_SUCCESS:
osal_queue_send(queue_kbd_hdl, &usb_keyboard_report);
tuh_hid_keyboard_get_report(dev_addr, (uint8_t*) &usb_keyboard_report);
break;
case XFER_RESULT_FAILED:
tuh_hid_keyboard_get_report(dev_addr, (uint8_t*) &usb_keyboard_report); // ignore & continue
break;
default :
break;
}
}
//--------------------------------------------------------------------+
// APPLICATION
//--------------------------------------------------------------------+
void keyboard_host_app_init(void)
{
tu_memclr(&usb_keyboard_report, sizeof(hid_keyboard_report_t));
queue_kbd_hdl = osal_queue_create( QUEUE_KEYBOARD_REPORT_DEPTH, sizeof(hid_keyboard_report_t) );
TU_ASSERT( queue_kbd_hdl, VOID_RETURN );
TU_VERIFY( osal_task_create(keyboard_host_app_task, "kbd", 128, NULL, KEYBOARD_APP_TASK_PRIO), );
}
//------------- main task -------------//
void keyboard_host_app_task(void* param)
{
(void) param;
OSAL_TASK_BEGIN
hid_keyboard_report_t kbd_report;
tusb_error_t error;
osal_queue_receive(queue_kbd_hdl, &kbd_report, OSAL_TIMEOUT_WAIT_FOREVER, &error);
(void) error; // suppress compiler warning
process_kbd_report(&kbd_report);
OSAL_TASK_END
}
//--------------------------------------------------------------------+
// HELPER
//--------------------------------------------------------------------+
// look up new key in previous keys
static inline bool find_key_in_report(hid_keyboard_report_t const *p_report, uint8_t keycode)
{
for(uint8_t i=0; i<6; i++)
{
if (p_report->keycode[i] == keycode) return true;
}
return false;
}
static inline void process_kbd_report(hid_keyboard_report_t const *p_new_report)
{
static hid_keyboard_report_t prev_report = { 0, 0, {0} }; // previous report to check key released
//------------- example code ignore control (non-printable) key affects -------------//
for(uint8_t i=0; i<6; i++)
{
if ( p_new_report->keycode[i] )
{
if ( find_key_in_report(&prev_report, p_new_report->keycode[i]) )
{
// exist in previous report means the current key is holding
}else
{
// not existed in previous report means the current key is pressed
uint8_t ch = keycode_to_ascii(p_new_report->modifier, p_new_report->keycode[i]);
putchar(ch);
if ( ch == '\r' ) putchar('\n'); // added new line for enter key
}
}
// TODO example skips key released
}
prev_report = *p_new_report;
}
static inline uint8_t keycode_to_ascii(uint8_t modifier, uint8_t keycode)
{
// TODO max of keycode_ascii_tbl
return keycode > 128 ? 0 :
hid_keycode_to_ascii_tbl [modifier & (KEYBOARD_MODIFIER_LEFTSHIFT | KEYBOARD_MODIFIER_RIGHTSHIFT) ? 1 : 0] [keycode];
}
#endif
|
