Abstract: Through the study of the Host Control Interface of Bluetooth Core Specification 1.2, the communication mechanisms and methods of the Bluetooth Baseband layer and the host side are analyzed. Some basic Bluetooth commands and events are illustrated, and related interfaces are explained. On this basis, the development of the Bluetooth HCI Layer is convenient.Key words: Bluetooth; HCI; baseband; Traff
For more information about the HCI specification, see First, we need to understand that the host part of HCI is implemented on Linux.1. Related Data Structure 1.1 Hci_devIn Linux, Hci_dev is used to represent an HCI Host (corresponding to a control)
Members
Role
Char Name[8]
Bluetooth name
__u8 Bus
Keywords: Bluetooth protocol HCI Anatomy HCI Overview HCI Note LMP l2cap SDP RFCOMMZhongjunIn the spirit of mutual learning purposes, to share this series of articles, welcome reprint, please specify the author, respect for copyright, thank youPlease correct me if the article is not in the wrong place, learn togetherThis series is currently intended to:LMP anatom
Android blueZ HCI (I): Implementation of hciconfig and common methods
Keywords: hciconfighcitool hcidumpAuthor: xubin341719 (You are welcome to reprint it. Please indicate the author. Please respect copyright. Thank you !)Correct the mistakes and learn and make progress together !!Android blueZ HCI (I): Implementation of hciconfig and common methodsAndroid blueZ hci
There are multiple threads in the Bluetooth process, where the HCI thread is responsible for processing and sending and receiving the Bluetooth host side and controller.This article analyzes the process of data processing for this thread.1. HCI-related interfacesFirst look at the related interfaces of HCI: in HCI_LAYER.C: const hci_t *hci_layer_get_interface ()
Dsads1. OverviewHCI supports four types of grouping:
Command group commands Packet
Asynchronous data grouping asynchronous Packet
Synchronous Data Packet
Events Group Event Packe
The grouping type is a byte value before the HCI group. The packet type has the following values:
Packet
Packet Type
command
1
asynchronous
, and traverse tasklet_actionThe tasklet_vec linked list calls each tasklet function to complete the Soft Interrupt operation.That is, call hci_rx_task ()
That is, when urb exists, hci_rx_task () is finally called ()
When the package type is HCI event, call hci_event_packet ()In hci_event_packet (), the system determines the event and processes it.
The following uses hci_ev_disconn_complete as an example to see how the event is processed. This event i
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Hci/chi (Human-computer interaction)--human-computer interaction
Human-Computer Interaction CHI (Computer Human interaction), also known internationally (Hci,human Computer interaction), is an interdisciplinary study that covers a wide range of topics, including cognitive science in the field of psycho
Data Structure 1, hci_event
Indicates the hardware status of the Bluetooth controller.
Enum hci_event {
Device_up, device Enabled
Device_down: Disable the device.
The device_error device has an error.
};
Header file: bt_hcip.h2. hci_type
Indicates the data packet type.
enum HCI_TYPE {
Command_packet = 1, command package
Data_packet_acl = 2, access control list data
Data_packet_sco = 3, connection-oriented data synchronization
Event_packet = 4, event
Etype_finish = End mark of 5 packets
};
Header
Recently in a customer to the master-slave module, based on the S130, a little farther away from the connection will appear immediately after the phenomenon of disconnection,Traced the reason, given the HCI Error code is 0x003e, for the moment do not know what the ghost, check out a post on the Internet, explained as follows:Disconnect reason 0x3e Hci_error_code_conn_failed_to_establish
I use TI CC2640 master machine, mobile phone do from the mach
Accessibility-Accessibility/Accessibility
Accessibility indicates the Accessibility of the webpage. W3C Web page accessibility is defined as follows:
"Webpage accessibility is accessible to people with disabilities. More specifically, the availability of web pages means that people with disabilities can perceive, understand, manipulate, interact with, and contribute to webpages. Web Accessibility also benefits non-Persons with disabilities, including the elderly who are weak due to a
In the process of Bluetooth enable, multiple threads are created and the threads are bound to the queue. This article mainly analyzes the processing of HCI data this thread.voidBtu_startup (void){. .. btu_bta_msg_queue=fixed_queue_new (Size_max);Btu_general_alarm_hash_map=hash_map_new (btu_general_alarm_hash_map_size, Hash_function_pointer, NULL, (DATA_FREE_FN) alarm_free, NULL) ;Btu_general_alarm_queue=fixed_queue_new (Size_max);Btu_oneshot_alarm_has
Contents of Beijing Union University
Smart City College
School of Tourism
College of automation
Business School
College of Art
[Email protected]HCI Practice 005-Web page layout
Is there any use for RHCSA certification? First of all, to understand the Red Hat Linux certification system, RHCSA is a Red Hat certification system in a junior certification, the content is mainly focused on system management, relatively simple, similar to the Oracle certificatio
Singing certification conditions:
1, engaged in singing, dance, art performance, music, modeling and related work;
2, with authoritative media on my honor, the introduction of the report;
3, have a certain network popularity, network reds, and media certification;
4, in the singing of the dissemination of my true video mv;
5, singing a singer-grade of more than three level F more
Asp.net| Security
The first three articles in the CSDN forum after the announcement, the effect is like "immortal fart--really different from every (counter) ring." In order to thank the broad masses of netizens enthusiasm and support, this is not, after a while of brewing, cultivation, deliberately prepared the fourth ring.
We have previously described the use of form authentication to achieve a single sign-on, as netizens said, can only be used under the same domain name. For a single sign-on
Label: style blog HTTP Io ar SP on 2014 log Pgmp certification (program management professional) is another authoritative project management certification launched by the American Project Management Association (PMI) following PMP. Pgmp®PMP Advanced Certification is a strong proof of knowledge, skills, experience and leadership that matches senior project manage
Microsoft certified Wuhan Test Center:
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The RedHat certified engineer (RHCE) RHCE is a RedHat company authorized certification that provides a variety of options for users who learn Linux technologies. Among the various international technical certification systems, the biggest difference between RHCE certification and Its value lies in the emphasis on the practical hands-on Testing Methods of trainees
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