registerClient(FmRxEvCallbacks callback){ boolean bReturnStatus = false; if (callback!=null) { mRxEvents.startListner(sFd, callback); bReturnStatus = true; } else { Log.d(TAG, "Null, do nothing"); } return bReturnStatus; }/*** Event Notification callback for deregistering a customer.** This is an Event Callback that is synchronously called to log out of the customer.** @ Return true always.* @ See # acquire* @ See # release* @ See # r
Poke here: 1575Test instructions: N signal transmitters are arranged on a straight line, and each transmitter activated will cause all transmitters within the affected range to be activated. Ask what is the maximum number of transmitters activated after activating any one of the transmitters.Official problem: May exist in the case of the ring, consider the sort by coordinates I is also at that time WHU invitational scene did not make out a problem. Ba
Particle SystemThe particle system in ogre can be described by scripts or code. The particle system defined by the particle script is actually a template, so the particle system defined by it can be easily reused in the program.Particle systems and scenariosThe particle system will be mounted to the scene node. Therefore, the translation, scaling, and rotation of the node will be associated with the particle system, affecting the direction of the particle reflection.The particle will be emitted
received from the outside. Add the start and stop mark to the output data stream and delete the start and stop mark from the received data stream. Handle the interrupt signal sent by the keyboard or mouse (the keyboard and mouse pass are also serial devices ). It can manage the synchronization between computers and external serial devices. Some of the more advanced uarts also provide the buffer for the input and output data. Now the newer UART is 16550, which can store 16 bytes of data in the b
on the official website as follows:Delay: When the particle system starts, how long does the transmitter wait to start launching?Duration: the time span of the transmitter, that is, the duration of the particle effect. Note that this time is different from the particle survival time.Count: As the name implies, the number of particles that can appear at the same time has a lower limit.Emission: the number o
During the data transmission of I2C bus, the master controller and the beam controller work in two opposite states and do not change during one communication;1. When the main controller is a transmitter (main control transmitter), the Controller is a receiver (controlled receiver );2. When the main controller is a receiver (the main controller is a dazzling receiver), the Controller is a
Source: Huaqing vision embedded School, source: http://www.embedu.org/Column/Column698.htm
Author: Instructor Cheng,Hua Qing vision embedded college lecturer.
I. Data Communication Methods
The basic data communication methods can be divided into parallel communication and serial communication.
(1) Parallel Communication: multiple data lines are used to send data simultaneously. It features high transmission speed and is suitable for short-distance communication.
(2) Serial Communication: one pi
wireless mode video stream to the receiving end, the output image, to Whdi as the representative. At present, only Whdi technology can be realized in the industry.
Transfer without delay
Because Whdi technology provides enough wireless bandwidth, without compressing the way to transmit, save the video in the compression and decompression process of time spent, so can ensure that the transmission of film and television frequency is completely without delay.
Resolution up to 1080P
Whdi techno
Localmessagesender object in another application. The transmitter always sends the first message, but the receiver may respond and implement bidirectional communication. You can also create both the transmitter and receiver objects in two applications so that one of them can send the first message.
When you create a sink, you must give it either a unique name in the global scope or a unique name within th
layer has different refractive index (R1), and its value is usually less than 1% of the fiber core. If the light
The angle of incidence less than the critical angle shoots into the core and cladding interface, and the light will be absorbed through the cladding into the coat.
The use of optical fiber as a transmission media must be equipped with photoelectric conversion equipment, namely, optical transmitter and optical receiver. The optical
Http://zhidao.baidu.com/link?url=nkdS5wMr2QzSxzSgUebp4r4HSlKuBn2Y3IqMu7bUi9NBABPtwvN7-Fd2rrfdn8TDSqnfVGNTvWvsHOQMzpoLq_
What is the effective omni-direction radiation power?
In fact, the directional transmitting antenna is often used, so that the transmitter power is concentrated in a particular direction and the energy is greatly enhanced in this particular direction.
assuming that the energy in a particular direction is greater than the non-directi
suspected that pilot contamination may exist, the first possibility is that there is not enough protection in pilot planning, and the other may be that the time tolerance of pilot channel of some base stations has a large deviation. For the latter, a transmitter tester can be used to test the potential base station. (Computer science)
The user complained to the warning and network management reports that there is a problem with the call, and has rul
Android4.3 has standardized the BLE API, but until now 4.4, some features are not perfect.In the BLE protocol, there are two roles, the perimeter (periphery) and the Center (central), the periphery is the data provider, the central is the data use/processor; in the iOS SDK, you can use an iOS device as a perimeter or as a central; Inside the SDK, until now the newest android4.4.2,android mobile phone can on
Original link:
Http://liuyanwei.jumppo.com/2015/07/17/ios-BLE-1.html
iOS bluetooth development (i) Bluetooth related basics:Bluetooth common names and abbreviations
MFI ======= make for ipad, iphone, itouch devices for Apple devices
ble = buletouch Low energy, Bluetooth 4.0 devices because of the power consumption, so also called
Google officially launched the Android 4.3 operating system on July 25, 13, supporting Bluetooth 4.0 with Bluetooth low energy/ble technology. According to Google's website, the SDK provides a demo development, a total of a few steps:1. Initialize ble2. Search for BLE devices3. Connecting devices that support common property protocols4. Read the Ble property5. Re
Overview:
Media independent interface (media-independent interface), or media-independent interface, is the Ethernet industry standard defined by the IEEE-802.3. It includes a data interface and a management interface between MAC and PHY.
Data interfaces include two independent channels used for the transmitter and receiver respectively. Each channel has its own data, clock, and control signal. The MII data interface requires a total of 16 signals.
Th
= 1 due to the pull-up resistance.
The txo end of this interface circuit is tested by adding a 1 kHz TTL square wave. When the 120 Ω end resistance is not added, both the 485-a and 485-b ports of the interface chip have a voltage variation process of about 50 μs, as shown in figure 2. The rising edge of the RO waveform at the receiving end has a significant delay of about 30 ~ 40 μs (compared with the DI of the data sending end), resulting in a large transmission error. When the 120 Ω resistan
Int SetReceiveMode (RTPTransmitter: ReceiveMode m)
----- Set the receiving mode to m. The value of m can be RTPTransmitter: AcceptAll, RTPTransmitter: AcceptSome, RTPTransmitter: IgnoreSome. Note! If the mode changes, all information about the received or ignored addresses will be lost.
Int AddToIgnoreList (const RTPAddress addr)
----- Add the address addr to the ignore address list.
Int DeleteFromIgnoreList (const RTPAddress addr)
----- Remove the address addr from the ignored address list.
V
By Sreekrishnan Venkateswaran
Linux Bluetooth
Bluetooth is a short-range wireless technology used to replace cables. It supports 723 kbps (asymmetric) and 432 kbps (symmetric) speeds to transmit data and voice. The transmission range of a Bluetooth device is about 10 meters (30 feet ).
BlueZ is the official Linux Bluetooth Stack. It consists of the Host Control Interface (HCI) layer, Bluetooth Protocol core, Logical Link Control and Adaptation Protocol (L2CAP) SCO audio layer, other Bluetooth
the environment with multi-path effects: beam forming and multi-channel space diversity. The following sections describe their functions and benefits.
Transmission Beam Forming Technology
Beam is a technology used when multiple transmitting and receiving antennas exist in an open or less obstacle environment. When multiple transmitting antennas exist, each sent RF signal produces a different phase during transmission due to different transmission paths. These differences will affect the overall
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