86 results about "Asynchronous serial interface" patented technology

Disclosed is a device for filtering out a null packet in a data stream for example an MPEG-2 TS (Transport Stream) to avoid bandwidth waste when it is transmitted to a backbone network. The device includes a plurality of receiving interfaces, a filter unit, and a controller. The receiving interfaces receive parallel data, such as DVB-ASI (Digital Video Broadcasting-Asynchronous Serial Interface) inputs as channel-by-channel MPEG-2 data. The filter unit counts the respective numbers of data packets and non-data packets of the data input from the receiving interfaces and filters a null packet in the data. A network transmission unit transmits the filtered data to a backbone network. The controller calculates a bit rate based on both of the count numbers received from the filter unit.

The disclosed gateway device for wireless sensor network comprises: a GPRS communication unit to communicate between the gateway and Internet or wireless communication network, a wireless RF transceiver for gateway and wireless sensor network, and a MPU to control the communication of former two units, wherein the MPU uses UART (general asynchronous serial interface) to communicate with the GPRS unit and SPI (synchronous serial interface) to communicate with the RF transceiver. This invention realizes reliable remote connection and bidirectional transmission for request in real application.

Systems and methods are disclosed which relate to improving synchronization of clocks between a sender and a receiver communicating via an asynchronous serial interface. In a ring topology, a master device is connected to a plurality of slaves communicating using a bi-frequency encoded bit stream. A host device communicates with the master device using a non-return-to-zero data encoding. Each slave receives data from the master and sends it to the next slave in the ring unaltered unless the master indicates a requirement for a particular data, and transmits placeholder bits with a value of 0 around the ring. A particular slave can “fill-in” the placeholder bits with the information to be sent back to the master by inverting the placeholder bit. Clock synchronization between a receiving device and a transmitting device is improved using a fractional rate multiplier to generate a data sampling clock from a system clock. By adjusting the denominator, the sampling clock can be tuned to match the baud rate of the asynchronous serial data stream received from the transmitting device. Embodiments described include power management, data acquisition (DAQ), etc.

The invention relates to a signal control device, in particular, a streetlight landscape light remote monitoring device. The working condition of all streetlight sites is polled in real time through the real-time monitoring of a streetlight landscape light remote monitoring terminal based on GPRS technique. When the streetlight sites fail, information about the failure can be rapidly transmitted to the monitoring center and processed as warning; therefore, the failure can be solved. When a telephone cable is cut and stolen, warning can be given to the monitoring center. A main control module, a switching value control detection module and a GPRS module are provided. The main control module is provided with a microprocessor, a power module and a time clock module. The communication terminal of the time clock module is connected with an I/O port. The control terminal of the switching value control detection module is axially connected with the electromagnetic coil terminal of an alternating current contactor. The detection terminal of the switching value control detection module is axially connected with the normally open and normally close contacting point of the alternating current contactor. The communication terminal of the switching value control detection module is connected with the I/O port of the microprocessor. The communication terminal of the GPRS module is connected with an asynchronous serial interface of the microprocessor.

An FPGA-based heterosynchronous switchable serial port and a method of use thereof, the serial port includes a universal asynchronous transceiver, a sending register, and a receiving register, and the universal asynchronous transceiver is mounted on an APB bus for realizing CPU transfer to The universal asynchronous transceiver transmits data, and the described universal asynchronous transceiver is provided with a state detection register, and the sending pin and the receiving pin of the universal asynchronous transceiver are respectively connected to the control end of the sending module FIFO and the receiving module FIFO, and the universal asynchronous transceiver The clock module of the register and the field programmable gate array is connected, and the serial port can be set to synchronous mode or asynchronous mode through the register of the asynchronous transceiver, and the input end of the receiving module FIFO and the output end of the sending module FIFO are respectively connected The receiving module and the sending module, the clock module of the field programmable gate array are respectively connected with the control ends of the receiving channel and the sending channel. The invention supports two interface forms of synchronous serial port and asynchronous serial port, and is compatible with the UART protocol. In the asynchronous serial port mode, the frequency division precision is improved, the bit error rate is reduced, and the stability and accuracy of data are obviously improved.

This invention discloses a blue-tooth multifunction remote controller and a method for realizing phone communication including: a blue-tooth module used in finishing RF T-R and its low baseband protocol process and providing control interfaces of a standard host computer and a processor module for finishing protocol stack process of middle and upper layers and the control of the whole system, in which, the processor module includes: a multi-point control unit, a 2-line asynchroinous serial interface, a 4-line asynchronous serial interface and at least one GPIO interface, and the blue-tooth module is connected with the multi-point control unit of the processor module via the 4-line asynchronous serial interface or the 2-line USB interface to further realize phone communication with the device and a set-top box.

The invention relates to a method for debugging an 8051 core-based system on chip (SOC) on line, and belongs to the technical field of integrated circuit design. On-line debugging software on a personal computer (PC) finishes communication with an asynchronous serial interface in the SOC through a serial line so as to realize on-line debugging. The system comprises the on-line debugging software on the PC, an RS232 conversion circuit and the 8051 core-based SOC. The method realizes the 51 instruction analysis, breakpoint processing, operation processing and content debugging of the SOC. Software codes are debugged on line by a few data lines after the mass production of chips is realized, so that the debugging work of the system is greatly simplified, the debugging time is shortened, the function optimization of the system is facilitated and the fault tolerance of the system is enhanced. Meanwhile, the scheme is simple and reliable, avoids using a logic analyzer and automatic test equipment to cause high cost, and can be applied to various SOCs taking an 8051 core as a control core.

The present invention discloses an asynchronous serial communication controller, which includes over three asynchronous serial communication controller internal control logics, a sending port, a receiving port, a sending objective register and a receiving source register, which correspond with each asynchronous serial controller, and a main controller. The main controller processes the information frames, which are received from each asynchronous serial port, judges whether the information frame type is instruction frame or data frame and processes the information correspondingly. If the information frame is an instruction frame, the main controller operates on a relative register according to the contents of the instruction frame. If the information frame is a data frame, the main controller sends the data frame contents at a set data format and rate from the set serial port according to contents of relative registers. The present invention has the following advantages that the present invention supports several asynchronous serial interfaces to communicate directly and mutually at a high speed, improves system efficiency and is easy to use.

The invention relates to a locomotive signal failure diagnosis apparatus, its CPU system composed of CPU, memory, reset circuit, crystal vibration circuit and bus drive circuit. It is composed by its CPU system linked with the following modules: asynchronous serial interface module, keyboard processing module, simulation head module, A/D detecting module linked to A/D interface of the tested board, bus analog circuit module, isolating input module adopting photoelectric coupled circuit, crystal detecting module composed of testing control, data register and frequency counter, and power supply monitoring module as well as probe circuit module which is linked with a testing probe. Its operation is simple and convenient, and its detecting result is intuitionistic. It controls the tested board working by the program, so able to quickly obtain plenty of overall testing data, which cooperates with the testing pen, further determining the failure point.

The invention discloses a design of singlechip-controlled switch power, which is characterized by comprising a numerical control switch power formation system of a singlechip and a numerical control system of a Sunplus singlechip switch power. The switch power formation system consists of an EML filter network, a rectifying filter circuit, a power converting circuit, a driving circuit, an output circuit, a voltage stabilizing circuit, an over-current protecting circuit and an auxiliary power circuit. The numerical control system of the switch power is controlled by an SPCE061A singlechip of Sunplus Company, the SPCE061A singlechip mainly comprises an input/output port, a timer/a counter, a D/A conversion, an A/D conversion, serial apparatus input output, a universal asynchronous serial interface, low voltage monitoring, reset, and the like. The invention has stable output voltage, high accuracy, wide adjustment range, high conversion efficiency and small power consumption and ripple current, thereby satisfying higher requirements on power source performance in laboratory and in life.

The invention relates to a multi-serial-port navigation information simulation integrated system, which is characterized in that hardware thereof includes a PC104 architectural computer, a monitoring display, an input device, an RS232/RS485 asynchronous serial interface chip and an interface device. The monitoring display and the input device are connected with the PC104 architectural computer directly, the interface device is a drive card with eight serial ports and is connected with the PC104 architectural computer through the RS232/RS485 asynchronous serial interface chip, the PC104 architectural computer realizes simulation of information of navigation equipment, a man-machine interaction interface is displayed in the monitoring display, and the interface device is connected with target equipment and can be provided with eight serial ports. The multi-serial-port navigation information simulation integrated system has the advantages of low dependence on hardware structure, low cost, high flexibility, convenience in carrying and use and reliable performance, and has the friendly man-machine interface.

The invention discloses a sensor data intelligent collecting system for a navigation system. The system can preprocess the collected sensor data prior to transmission to improve the anti-interferenceability of the collected data and have a certain error compensation capability, the preprocessing process does not need a remote main control processor for intervention, the system is integrated witha full-duplex and dual-redundant high-speed asynchronous serial interface with RS422 level so as to complete high-reliability and high-speed transmission and update of the inertial sensor measurementdata and facilitate timely navigation resolving task of the CPU.

The invention discloses a TACAN control system based on a DSP. A core portion of a main control unit is a DSP chip TMS320C6000, and a peripheral circuit of the DSP chip comprises a TL16C754, a CPLDC208, a FM22L16 and a FLASH_SST39VF040 and is connected with a DSP data bus and an address bus through EMIF interfaces. The CPLDC208 and the FM22L16 are connected with the DSP chip TMS320C6000 through buses and the EMIF interfaces. Through hardware programming, the decoding function of the CPLDC208 is used in cooperation with the TL16C754 so that crystal oscillation of 11.0592MHz can be adopted, asynchronous serial interfaces of 12 routes of RS232 are expanded, and meanwhile the CPLDC208 controls the I/O high electric level and the I/O low electric level through an emitter following circuit 2N222 so as to control the device state. The main control unit obtains various monitoring parameters from the monitoring unit, obtains working state information of all working units from each working unit plate, obtains human interference instructions from a keyboard and a switch on a control panel, and judges thresholds of the various obtained monitoring parameters, and when the thresholds are exceeded, an audible and visual alarm is given, dual-machine conversion operation is executed, and working parameters of the system and the units are set and modified. The TACAN control system has the advantage that instantaneity of the control system is achieved through the rapid running capacity of the DSP.

The invention discloses a decoder allowing independent descrambling of two television programs and controlling of distributed output of TS (transport streaming) flows. The decoder comprises an FPGA (field programmable gate array) module, a signal receiving module, a main chip module, a program descrambling module, an ASI (asynchronous serial interface) output module and an audio-video output module; the FPGA module is used for processing and distributing original encrypted TS flows and descrambled TS flows; the signal receiving module connected with the FPGA module is used for receiving two digital television programs of independent frequencies and outputting original TS flows; the main chip module connected with the FPGA module is used for controlling a system and decoding and playing audio-video; the program descrambling module connected with the FPGA module is used for descrambling the TS flows of the two television programs and outputting the descrambled TS flows through two PCMCIA (personal computer memory card international association) CAM (conditional access module) cards; the ASI output module connected with the FPGA module is used for converting and outputting parallel TS flows to an ASI interface; the audio-video output module connected with the main chip module is used for outputting descrambled and decoded television programs. The decoder has the advantages such as operational flexibility, high compatibility and low cost.

The invention discloses a method for stabilizing image of handheld equipment, which comprises the steps: (a) starting a sensor in the handheld equipment to acquire swaying data; and (b) converting an analog signal in the step (a) into a digital signal, transmitting the digital signal to a digital signal processor and a CPU for processing, controlling the start position of dot array and scan row of a display screen by a display screen driver to control the image position, and storing the position. The invention also discloses a device for implementing the method, which comprises the CPU, the sensor, an analog-digital conversion module, the digital signal processor, an asynchronous serial interface, the display screen driver, and the display screen and a storage, which are connected with each other in sequence, wherein the storage is connected with the CPU. The invention provides the method and a device for stabilizing image of the handheld equipment, which are capable of alleviating or eliminating visual fatigue caused by image of the handheld equipment in swaying environment.

The invention discloses a RF testing module which is reasonable in structure, high in universality and low in cost, and testing equipment containing the RF testing module. The invention comprises theRF testing module and the testing equipment containing the RF testing module; the RF testing module comprises a RF amplification module, a prescaler, a first waveform shaping circuit module, a complexprogrammable logic device, a microprocessor and an asynchronous serial interface electrically connected in order; the RF amplification module is electrically connected with an external antenna; the asynchronous serial interface is electrically connected with an external upper computer; the RF testing module further comprises a RMS detector and a second waveform shaping circuit module; the RMS detector is electrically connected with each of the external antenna, the second waveform shaping circuit module and the microprocessor; and the second waveform shaping circuit module is electrically connected with the microprocessor. The testing equipment disclosed by the invention is applied to the technical field of testing equipment of the security-protection sensor.

The present invention provides a small satellite ground station. The small satellite ground station comprises an outdoor unit and an indoor unit. The outdoor unit comprises a satellite antenna, multiple receivers, an asynchronous serial interface hub, a first communication device, and a first power supply device. The multiple receivers are each in communicated connection with the satellite antenna and realize different satellite data communication functions. The asynchronous serial interface hub are connected with multiple receivers through multiple asynchronous serial interfaces. The first communication device establishes a network connection with the multiple receivers and the asynchronous serial interface hub so as to transmit satellite data from multiple receivers to the indoor unit. The first power supply device powers the above devices inside the outdoor unit. The indoor unit comprises an information processing device, a second communication device, and a second power supply device. The information processing device processes satellite data from the multiple receivers. The second communication device establishes a network connection with the first communication device and the information processing device, receives satellite data from the first communication device and transmits the satellite data to the information processing device. The second power supply device powers the above devices in the indoor unit.

The invention relates to a television signal transmitter combining wired television transmission and network television transmission. The television signal transmitter comprises a digital voice signal acquisition module, a digital video signal acquisition module, an additional data acquisition module, a packing and multiplexing module, a 8B/10B encoding module, a synchronous character insertion module, a serial-parallel conversion module, an asynchronous serial interface (ASI) processing module, an IP (Internet Protocol) packing module, a UDP (User Datagram Protocol) packing module and a conversion control module, wherein the packing and multiplexing module is connected with the digital voice signal acquisition module, the digital video signal acquisition module and the additional data acquisition module to be respectively used for receiving compressed voice data, compressed video data and encoded additional data, packing and multiplexing the data and processing the packed and multiplexed data under the control of the conversion control module so as to obtain wired television signals or network television signals. Through the invention, the functions of the transmitter can be expanded, and wired television signal transmission and network television signal transmission are combined.