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
[2] creating a more approachable Web site within 30 days
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
applications based on OpenStack Ocata; VMware vRealize Network Insight 3.5 provides more monitoring and compliance capabilities for NSX; The new HCI acceleration Kit, a cost-effective hyper-converged architecture (HCI) system driven by VMware Vsan, enables distributed it; new VMwa
. "With VMware Cloud on AWS, we get a higher level of agility, scalability, and resiliency with a multi-AZ deployment platform," said Lesley Ashman, chief information officer, Stagecoach Group. With consistent infrastructure and operational models, VMware Cloud on AWS lowers our risk of migrating business-critical applications to the cloud. ”On the basis of VMware
1. Switch to the root user www.2cto.com 2, click the VM option of VMware, click settings, click CD/DVD in the hardware option, and in the USe ISO image fileSelect the vmware installation directory, which is in C: \ Program Files \ VMware Workstation \ linux. iso.The so file is equivalent to the vmware TOOls Installatio
Prompt for boot error when VMware ESXi starts:Bank6 not a VMware boot bankNo hypervisor foundProbably Chinese means: not a VMware boot slot. The hypervisor could not be found.Online to see https://communities.vmware.com/thread/429698 has a netizen solution said, delete the characters of the partition will cause the GPT modification (to the effect)Just remember be
Installing the Virtual Machine Task Manager will cause Vmware-hostd.exe to take up 80 ports, causing XAMPP to open, so you want to turn off VMware, the solution is as follows: Start-run--services.msc, find the service that starts with the VM, change to Manual, and stop the service. Here's how to: http://bbs.cfanclub.net/thread-497122-1-1.html When you want to use VM virtual machinesVMware Authorization serv
To learn Python on Linux, the virtual machine is installed today and the Ubuntu system is installed on it. When the installation is complete, you are always prompted to install VMware Tools, and as a result of curiosity, we looked online for information about the role of VMware Tools and how to install it. Now you can summarize the knowledge of VMware tools and m
VMware tools enables you to copy text, files, and so on between hosts test Environment:
VMware Workstation 12.5Host: Windows7 SP1 x64Virtual machine: Ubuntu Linux 16.4 Step1
Choose from the VMware menu, virtual machine--> update VMware Tools
The following prompts appear:
Mount the virtual CD drive on the client, start
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