1 |
|
|
/*************************************************************************** |
2 |
|
|
* Copyright (c) 2024 Microsoft Corporation |
3 |
|
|
* |
4 |
|
|
* This program and the accompanying materials are made available under the |
5 |
|
|
* terms of the MIT License which is available at |
6 |
|
|
* https://opensource.org/licenses/MIT. |
7 |
|
|
* |
8 |
|
|
* SPDX-License-Identifier: MIT |
9 |
|
|
**************************************************************************/ |
10 |
|
|
|
11 |
|
|
|
12 |
|
|
/**************************************************************************/ |
13 |
|
|
/**************************************************************************/ |
14 |
|
|
/** */ |
15 |
|
|
/** USBX Component */ |
16 |
|
|
/** */ |
17 |
|
|
/** HID Remote Control Class */ |
18 |
|
|
/** */ |
19 |
|
|
/**************************************************************************/ |
20 |
|
|
/**************************************************************************/ |
21 |
|
|
|
22 |
|
|
|
23 |
|
|
/* Include necessary system files. */ |
24 |
|
|
|
25 |
|
|
#define UX_SOURCE_CODE |
26 |
|
|
|
27 |
|
|
#include "ux_api.h" |
28 |
|
|
#include "ux_host_class_hid.h" |
29 |
|
|
#include "ux_host_class_hid_keyboard.h" |
30 |
|
|
#include "ux_host_stack.h" |
31 |
|
|
|
32 |
|
|
|
33 |
|
|
/**************************************************************************/ |
34 |
|
|
/* */ |
35 |
|
|
/* FUNCTION RELEASE */ |
36 |
|
|
/* */ |
37 |
|
|
/* _ux_host_class_hid_keyboard_key_get PORTABLE C */ |
38 |
|
|
/* 6.1 */ |
39 |
|
|
/* AUTHOR */ |
40 |
|
|
/* */ |
41 |
|
|
/* Chaoqiong Xiao, Microsoft Corporation */ |
42 |
|
|
/* */ |
43 |
|
|
/* DESCRIPTION */ |
44 |
|
|
/* */ |
45 |
|
|
/* This function reads the key and keyboard state from the */ |
46 |
|
|
/* round-robin buffer. */ |
47 |
|
|
/* */ |
48 |
|
|
/* INPUT */ |
49 |
|
|
/* */ |
50 |
|
|
/* keyboard_instance Pointer to remote control */ |
51 |
|
|
/* keyboard key Pointer to keyboard key */ |
52 |
|
|
/* keyboard state Pointer to keyboard state */ |
53 |
|
|
/* */ |
54 |
|
|
/* OUTPUT */ |
55 |
|
|
/* */ |
56 |
|
|
/* Completion Status */ |
57 |
|
|
/* */ |
58 |
|
|
/* CALLS */ |
59 |
|
|
/* */ |
60 |
|
|
/* _ux_host_stack_class_instance_verify Verify instance */ |
61 |
|
|
/* */ |
62 |
|
|
/* CALLED BY */ |
63 |
|
|
/* */ |
64 |
|
|
/* User application */ |
65 |
|
|
/* */ |
66 |
|
|
/* RELEASE HISTORY */ |
67 |
|
|
/* */ |
68 |
|
|
/* DATE NAME DESCRIPTION */ |
69 |
|
|
/* */ |
70 |
|
|
/* 05-19-2020 Chaoqiong Xiao Initial Version 6.0 */ |
71 |
|
|
/* 09-30-2020 Chaoqiong Xiao Modified comment(s), */ |
72 |
|
|
/* resulting in version 6.1 */ |
73 |
|
|
/* */ |
74 |
|
|
/**************************************************************************/ |
75 |
|
4447 |
UINT _ux_host_class_hid_keyboard_key_get(UX_HOST_CLASS_HID_KEYBOARD *keyboard_instance, |
76 |
|
|
ULONG *keyboard_key, ULONG *keyboard_state) |
77 |
|
|
{ |
78 |
|
|
|
79 |
|
|
ULONG *array_head; |
80 |
|
|
ULONG *array_tail; |
81 |
|
|
ULONG *array_end; |
82 |
|
|
ULONG *array_start; |
83 |
|
|
UX_HOST_CLASS_HID *hid; |
84 |
|
|
|
85 |
|
|
/* Get the HID class associated with the HID client. */ |
86 |
|
4447 |
hid = keyboard_instance -> ux_host_class_hid_keyboard_hid; |
87 |
|
|
|
88 |
|
|
/* Ensure the instance is valid. */ |
89 |
✓✓ |
4447 |
if (_ux_host_stack_class_instance_verify(_ux_system_host_class_hid_name, (VOID *) hid) != UX_SUCCESS) |
90 |
|
|
{ |
91 |
|
|
|
92 |
|
|
/* If trace is enabled, insert this event into the trace buffer. */ |
93 |
|
|
UX_TRACE_IN_LINE_INSERT(UX_TRACE_ERROR, UX_HOST_CLASS_INSTANCE_UNKNOWN, hid, 0, 0, UX_TRACE_ERRORS, 0, 0) |
94 |
|
|
|
95 |
|
1 |
return(UX_HOST_CLASS_INSTANCE_UNKNOWN); |
96 |
|
|
} |
97 |
|
|
|
98 |
|
|
/* Load the keyboard key and state from the usage array . */ |
99 |
|
4446 |
array_start = keyboard_instance -> ux_host_class_hid_keyboard_usage_array; |
100 |
|
4446 |
array_end = array_start + UX_HOST_CLASS_HID_KEYBOARD_USAGE_ARRAY_LENGTH; |
101 |
|
4446 |
array_head = keyboard_instance -> ux_host_class_hid_keyboard_usage_array_head; |
102 |
|
4446 |
array_tail = keyboard_instance -> ux_host_class_hid_keyboard_usage_array_tail; |
103 |
|
|
|
104 |
|
|
/* We want to extract a usage/value from the circular queue of the keyboard instance. */ |
105 |
✓✓ |
4446 |
if (array_tail == array_head) |
106 |
|
3752 |
return(UX_ERROR); |
107 |
|
|
|
108 |
|
|
/* Get the usage/value from the current tail. */ |
109 |
|
694 |
*keyboard_key = *array_tail; |
110 |
|
694 |
*keyboard_state = *(array_tail + 1); |
111 |
|
|
|
112 |
|
|
/* Now we need to update the tail value. Are we at the end of the array? */ |
113 |
✓✓ |
694 |
if ((array_tail+2) >= array_end) |
114 |
|
20 |
array_tail = array_start; |
115 |
|
|
else |
116 |
|
674 |
array_tail+=2; |
117 |
|
|
|
118 |
|
|
/* Set the tail pointer. */ |
119 |
|
694 |
keyboard_instance -> ux_host_class_hid_keyboard_usage_array_tail = array_tail; |
120 |
|
|
|
121 |
|
|
/* The status will tell the application there is something valid in the key/state. */ |
122 |
|
694 |
return(UX_SUCCESS); |
123 |
|
|
} |
124 |
|
|
|
125 |
|
|
/**************************************************************************/ |
126 |
|
|
/* */ |
127 |
|
|
/* FUNCTION RELEASE */ |
128 |
|
|
/* */ |
129 |
|
|
/* _uxe_host_class_hid_keyboard_key_get PORTABLE C */ |
130 |
|
|
/* 6.3.0 */ |
131 |
|
|
/* AUTHOR */ |
132 |
|
|
/* */ |
133 |
|
|
/* Chaoqiong Xiao, Microsoft Corporation */ |
134 |
|
|
/* */ |
135 |
|
|
/* DESCRIPTION */ |
136 |
|
|
/* */ |
137 |
|
|
/* This function checks errors in HID key get function call. */ |
138 |
|
|
/* */ |
139 |
|
|
/* INPUT */ |
140 |
|
|
/* */ |
141 |
|
|
/* keyboard_instance Pointer to remote control */ |
142 |
|
|
/* keyboard key Pointer to keyboard key */ |
143 |
|
|
/* keyboard state Pointer to keyboard state */ |
144 |
|
|
/* */ |
145 |
|
|
/* OUTPUT */ |
146 |
|
|
/* */ |
147 |
|
|
/* Status */ |
148 |
|
|
/* */ |
149 |
|
|
/* CALLS */ |
150 |
|
|
/* */ |
151 |
|
|
/* _ux_host_class_hid_keyboard_key_get Get a keyboard key */ |
152 |
|
|
/* */ |
153 |
|
|
/* CALLED BY */ |
154 |
|
|
/* */ |
155 |
|
|
/* Application */ |
156 |
|
|
/* */ |
157 |
|
|
/* RELEASE HISTORY */ |
158 |
|
|
/* */ |
159 |
|
|
/* DATE NAME DESCRIPTION */ |
160 |
|
|
/* */ |
161 |
|
|
/* 10-31-2023 Chaoqiong Xiao Initial Version 6.3.0 */ |
162 |
|
|
/* */ |
163 |
|
|
/**************************************************************************/ |
164 |
|
|
UINT _uxe_host_class_hid_keyboard_key_get(UX_HOST_CLASS_HID_KEYBOARD *keyboard_instance, |
165 |
|
|
ULONG *keyboard_key, ULONG *keyboard_state) |
166 |
|
|
{ |
167 |
|
|
|
168 |
|
|
/* Sanity checks. */ |
169 |
|
|
if ((keyboard_instance == UX_NULL) || |
170 |
|
|
(keyboard_key == UX_NULL) || (keyboard_state == UX_NULL) || |
171 |
|
|
(keyboard_key == keyboard_state)) |
172 |
|
|
return(UX_INVALID_PARAMETER); |
173 |
|
|
|
174 |
|
|
/* Invoke key get function. */ |
175 |
|
|
return(_ux_host_class_hid_keyboard_key_get(keyboard_instance, keyboard_key, keyboard_state)); |
176 |
|
|
} |