1 /**************************************************************************/
2 /* */
3 /* Copyright (c) Microsoft Corporation. All rights reserved. */
4 /* */
5 /* This software is licensed under the Microsoft Software License */
6 /* Terms for Microsoft Azure RTOS. Full text of the license can be */
7 /* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */
8 /* and in the root directory of this software. */
9 /* */
10 /**************************************************************************/
11
12
13 /**************************************************************************/
14 /**************************************************************************/
15 /** */
16 /** USBX Component */
17 /** */
18 /** HID Class */
19 /** */
20 /**************************************************************************/
21 /**************************************************************************/
22
23
24 /* Include necessary system files. */
25
26 #define UX_SOURCE_CODE
27
28 #include "ux_api.h"
29 #include "ux_host_class_hid.h"
30 #include "ux_host_stack.h"
31
32
33 /**************************************************************************/
34 /* */
35 /* FUNCTION RELEASE */
36 /* */
37 /* _ux_host_class_hid_item_data_get PORTABLE C */
38 /* 6.1 */
39 /* AUTHOR */
40 /* */
41 /* Chaoqiong Xiao, Microsoft Corporation */
42 /* */
43 /* DESCRIPTION */
44 /* */
45 /* This function returns a data from the descriptor based on its size, */
46 /* format and whether it is signed or not. */
47 /* */
48 /* INPUT */
49 /* */
50 /* descriptor Pointer to descriptor */
51 /* item Pointer to item */
52 /* */
53 /* OUTPUT */
54 /* */
55 /* ULONG data value */
56 /* */
57 /* CALLS */
58 /* */
59 /* _ux_utility_short_get Get 16-bit value */
60 /* */
61 /* CALLED BY */
62 /* */
63 /* HID Class */
64 /* */
65 /* RELEASE HISTORY */
66 /* */
67 /* DATE NAME DESCRIPTION */
68 /* */
69 /* 05-19-2020 Chaoqiong Xiao Initial Version 6.0 */
70 /* 09-30-2020 Chaoqiong Xiao Modified comment(s), */
71 /* resulting in version 6.1 */
72 /* */
73 /**************************************************************************/
_ux_host_class_hid_item_data_get(UCHAR * descriptor,UX_HOST_CLASS_HID_ITEM * item)74 ULONG _ux_host_class_hid_item_data_get(UCHAR *descriptor, UX_HOST_CLASS_HID_ITEM *item)
75 {
76
77 ULONG value;
78
79
80 /* Get the length of the item. */
81 switch (item -> ux_host_class_hid_item_report_length)
82 {
83
84 case 1:
85
86 value = (ULONG) *descriptor;
87 break;
88
89
90 case 2:
91
92 value = (ULONG) _ux_utility_short_get(descriptor);
93 break;
94
95
96 case 4:
97
98 value = (ULONG) _ux_utility_long_get(descriptor);
99 break;
100
101
102 default:
103
104 return(0);
105 }
106
107 /* Return the value. */
108 return(value);
109 }
110
111
