Outline ![]()
Files ![]()
loading...
CodeScope![]()
STM32 Libraries and Samples![]()
usbx![]()
common/usbx_device_classes/src/ux_device_class_cdc_acm_deactivate.c
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
/**************************************************************************/
/* */
/* Copyright (c) Microsoft Corporation. All rights reserved. */
/* */
/* This software is licensed under the Microsoft Software License */
/* Terms for Microsoft Azure RTOS. Full text of the license can be */
/* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */
/* and in the root directory of this software. */
/* */
/**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** USBX Component */
/** */
/** Device CDC Class */
/** */
/**************************************************************************/
/**************************************************************************/
#define UX_SOURCE_CODE
/* Include necessary system files. */
#include "ux_api.h"
#include "ux_device_class_cdc_acm.h"
#include "ux_device_stack.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _ux_device_class_cdc_acm_deactivate PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function deactivate an instance of the cdc_acm class. */
/* */
/* INPUT */
/* */
/* command Pointer to a class command */
/* */
/* OUTPUT */
/* */
/* Completion Status */
/* */
/* CALLS */
/* */
/* _ux_device_stack_transfer_all_request_abort Abort all transfers */
/* _ux_device_class_cdc_acm_ioctl IO control */
/* */
/* CALLED BY */
/* */
/* CDC Class */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 Chaoqiong Xiao Initial Version 6.0 */
/* 09-30-2020 Chaoqiong Xiao Modified comment(s), */
/* resulting in version 6.1 */
/* */
/**************************************************************************/
UINT _ux_device_class_cdc_acm_deactivate(UX_SLAVE_CLASS_COMMAND *command)
{
UX_SLAVE_INTERFACE *interface;
UX_SLAVE_CLASS_CDC_ACM *cdc_acm;
UX_SLAVE_ENDPOINT *endpoint_in;
UX_SLAVE_ENDPOINT *endpoint_out;
UX_SLAVE_CLASS *class;
/* Get the class container. */
class = command -> ux_slave_class_command_class_ptr;
/* Get the class instance in the container. */
cdc_acm = (UX_SLAVE_CLASS_CDC_ACM *) class -> ux_slave_class_instance;
/* We need the interface to the class. */
interface = cdc_acm -> ux_slave_class_cdc_acm_interface;
/* Locate the endpoints. */
endpoint_in = interface -> ux_slave_interface_first_endpoint;
/* Check the endpoint direction, if IN we have the correct endpoint. */
if ((endpoint_in -> ux_slave_endpoint_descriptor.bEndpointAddress & UX_ENDPOINT_DIRECTION) != UX_ENDPOINT_IN)
{
/* Wrong direction, we found the OUT endpoint first. */
endpoint_out = endpoint_in;
/* So the next endpoint has to be the IN endpoint. */
endpoint_in = endpoint_out -> ux_slave_endpoint_next_endpoint;
}
else
{
/* We found the endpoint IN first, so next endpoint is OUT. */
endpoint_out = endpoint_in -> ux_slave_endpoint_next_endpoint;
}
/* Terminate the transactions pending on the endpoints. */
_ux_device_stack_transfer_all_request_abort(endpoint_in, UX_TRANSFER_BUS_RESET);
_ux_device_stack_transfer_all_request_abort(endpoint_out, UX_TRANSFER_BUS_RESET);
/* Terminate transmission and free resources. */
_ux_device_class_cdc_acm_ioctl(cdc_acm, UX_SLAVE_CLASS_CDC_ACM_IOCTL_TRANSMISSION_STOP, UX_NULL);
/* If there is a deactivate function call it. */
if (cdc_acm -> ux_slave_class_cdc_acm_parameter.ux_slave_class_cdc_acm_instance_deactivate != UX_NULL)
{
/* Invoke the application. */
cdc_acm -> ux_slave_class_cdc_acm_parameter.ux_slave_class_cdc_acm_instance_deactivate(cdc_acm);
}
/* We need to reset the DTR and RTS values so they do not carry over to the
next connection. */
cdc_acm -> ux_slave_class_cdc_acm_data_dtr_state = 0;
cdc_acm -> ux_slave_class_cdc_acm_data_rts_state = 0;
/* If trace is enabled, insert this event into the trace buffer. */
UX_TRACE_IN_LINE_INSERT(UX_TRACE_DEVICE_CLASS_CDC_ACM_DEACTIVATE, cdc_acm, 0, 0, 0, UX_TRACE_DEVICE_CLASS_EVENTS, 0, 0)
/* If trace is enabled, register this object. */
UX_TRACE_OBJECT_UNREGISTER(cdc_acm);
/* Return completion status. */
return(UX_SUCCESS);
}