142 results about "Baud" patented technology

The invention relates to the technical field of computer hardware and network communication, in particular to a high-speed I / O (input / output) virtualization server based on an FPGA (field programmable gate array) and a remote forwarding method.The high-speed I / O virtualization server comprises an FPGA chip, a network processing unit, an I / O protocol processing unit, a protocol conversion and scheduling unit, a time sequence and transaction management unit and a data buffering and flow control unit are integrated in the FPGA chip; the optical fiber Ethernet interface module comprises a physical layer interface and an MAC layer processing and network configuration interface; the local I / O interface module comprises a USB interface circuit, a serial port interface circuit, a PCIe interface circuit and an interface expansion connector; the power supply and monitoring module comprises a multi-path power supply management system, a state monitoring and diagnosis system and an LED indication system; according to the self-adaptive Baud rate detection circuit, the Baud rate can be accurately locked under the condition that data with less than two characters is received, the number of data bits, the type of a check bit and the length of a stop bit are automatically identified, and compared with a traditional microcontroller scheme, the self-adaptive Baud rate detection circuit has higher precision and higher detection speed.

The invention provides a dynamic adaptation method and system for a multi-mode power supply compatible charging pile system, and the method comprises the steps: building a multi-protocol physical layer compatible connection between a charging pile and a power supply module through a multi-communication interface layer, and receiving a data frame inputted by the charging pile; analyzing a baud rate, a check bit and an instruction set of the data frame, and identifying a charging pile protocol type and a power module protocol type; querying a matching mapping relationship between the charging pile protocol type and the power supply module protocol type in the dynamic adaptation matrix; if the matching mapping relation exists, data field conversion is executed, and a target protocol frame is generated; and if the matching mapping relation does not exist, starting a machine learning process, creating a temporary mapping rule, and effectively solving the problems of poor compatibility and high manual configuration cost of the charging pile and the power supply module in a traditional protocol mode through the modes of protocol analysis, intelligent matching and dynamic learning.

The embodiments of the present application relate to the technical field of radio communications. Provided are a radio-over-fiber communication apparatus, system and method. The radio-over-fiber communication apparatus comprises: an aggregation module, which is coupled to a remote radio head and is used for adjusting the baud rate of a feedback signal to obtain a compatible signal, combining the compatible signal and a received signal, so as to obtain an aggregated signal, and transmitting the aggregated signal by means of an optical fiber link, wherein the feedback signal is used for performing nonlinear compensation on a transmitted signal, and the frequency null of the compatible signal overlaps the frequency point of the received signal; and a splitting module, which is coupled to a baseband unit and is used for acquiring the aggregated signal by means of the optical fiber link, and splitting the aggregated signal into two signals, wherein the two signals are respectively used for the baseband unit to acquire the received signal and the feedback signal. In the solution provided in the present application, existing optical fiber resources in a radio-over-fiber communication system can be used to reduce the cost and power consumption of the system.

The invention provides a dual-CAN channel fusion J1939 protocol stack of a vehicle-mounted terminal and a parallel communication diagnosis method, and aims to solve the problems that an existing dual-CAN channel terminal lacks a protocol layer parallel processing mechanism and an intelligent routing strategy, communication and diagnosis conflicts still exist, and a J1939 protocol is insufficient in adaptation and poor in baud rate adaptation flexibility. The method comprises the following steps: S1, constructing a dual-CAN FD channel and dynamic baud rate adaptive detection mechanism, and providing a link basis for service isolation; s2, integrating J1939 and UDSonCAN dual protocol stacks based on dual CAN FD channels, and establishing data mapping to realize data collaboration between protocols; s3, designing an intelligent message routing and channel flow monitoring mechanism, and ensuring conflict-free parallel transmission of communication and diagnosis services; and S4, newly adding J1939 network management, configuration parameter persistence and firmware online upgrading functions, and improving the maintainability of the terminal. According to the invention, the advantages of dual-CAN channel hardware are fully exerted, efficient cooperation of communication and diagnosis and protocol deep compatibility are realized, and the compatibility, flexibility and stability of the terminal are greatly improved.

The invention discloses a serial port baud rate adaptive adjustment method and a prototype verification platform, and relates to the technical field of chip verification, and the method comprises the steps: determining a third value range corresponding to a configured register according to a first value range of the working frequency of the prototype verification platform and a second value range of a baud rate corresponding to a serial port module, after sampling is carried out according to different baud rates in the second value range, the obtained first corresponding relation between the baud rates and the mapping values is converted into the second corresponding relation between the register values and the mapping values, the second corresponding relation determines the optimal register value in the third value range, and then the optimal baud rate is determined according to the optimal register value. The technical effects that the optimal baud rate can be determined according to the test scene change and the hardware environment limitation of the prototype verification platform, so that the current test scene is adapted, the baud rate of a serial port does not need to be manually and repeatedly adjusted and configured after the test scene is switched, and the test efficiency of the prototype verification platform is improved are achieved.

This invention discloses a baud rate setting method, apparatus, device, and storage medium. The method includes: identifying preset baud rate validity flag information in a preset memory of a target control unit to obtain a baud rate validity flag information identification result; determining a target baud rate setting strategy for the target control unit that matches an associated data transmission object based on the baud rate validity flag information identification result; and setting the target baud rate of the target control unit according to the target baud rate setting strategy. The technical solution of this invention solves the problem that existing technologies offer only one baud rate setting method, which is not applicable to different scenarios. It can enrich the baud rate setting methods, match appropriate baud rate setting methods according to different scenarios, and improve adaptability to different scenarios.

The application belongs to the technical field of integrated circuits, and particularly relates to a UART decimal correction circuit and a correction method. The UART decimal correction circuit comprises a frequency division coefficient preloading circuit, an integer frequency division up counter, a decimal correction down counter, and a decimal correction algorithm circuit. The decimal correction algorithm circuit is used for inputting a count value cnt_i[9:0] and a count value cnt_f[3:0], determining a decimal correction sampling point through a shift, negation and comparison mode, and outputting a pulse signal reload to the integer frequency division up counter, the decimal correction down counter and a D flip-flop. When the pulse signal reload is valid, it is determined whether the integer frequency division up counter needs to be added by 1 and whether the decimal correction down counter needs to be subtracted by 1. The D flip-flop is used. The application determines the decimal correction sampling point through the shift, negation and comparison algorithm, so that a more accurate baud rate is realized with less logic.

Systems, methods, and apparatuses for industrial equipment diagnostics are disclosed. Specifically, a bus controller operatively connected to a processor is physically connected to two or more controller area network (CAN) buses, wherein each CAN bus operates according to a different protocol. The bus controller is configured to control the rate at which messages are received on certain buses by adjusting parameters such as a baud rate and sample rate. The bus controller is further configured to filter or mask certain CAN bus messages based on identifiers within the messages. The bus controller is operatively connected to a remote processing system for processing the CAN bus messages from their raw data format into a useable format. The remote processing system performs diagnostic analysis on the processed CAN bus messages, and furthermore performs predictive analytics on the processed CAN bus messages to identify patterns or discrete events indicative of future system failures.

An adjustable bandwidth current-to-voltage converter for use in an optical receiver includes an input configured to receive current from a photodetector; an amplifier stage connected to the input; a feedback path connected to the amplifier stage and to an output, wherein the feedback path includes a feedback element and an operating mode switch configured to set one of photodetector amplifier with dynamic load (PADL) mode and an integrate-and-dump (I&D) mode. The PADL mode is for higher baud operation than the I&D mode.

The invention belongs to the technical field of digital information transmission, and particularly relates to instrument data acquisition, in particular to an instrument data acquisition system and an instrument data acquisition method.According to the instrument data acquisition system, after acquisition equipment is connected with instrument equipment, a time parameter of a first code element is obtained; the Baud rate is preliminarily determined according to the time parameter of the first code element, data acquisition is carried out according to the preliminarily determined Baud rate, an oscillogram is constructed according to the acquired data, the final Baud rate is determined in the oscillogram according to the effective area, and after the final Baud rate is determined, data interaction is carried out between the instrument equipment and the final Baud rate. Therefore, the Baud rate of the instrument equipment can be quickly and accurately determined, the acquisition equipment can conveniently adopt the Baud rate corresponding to the instrument equipment for communication, and accurate transmission of instrument data is completed.

The invention discloses a nitrogen-oxygen sensor protocol adaptive detection device and method based on machine learning, and relates to the technical field of vehicle emission control. The equipment comprises an upper computer, a CAN (Controller Area Network) communication module, IO (Input / Output) equipment and a controllable power supply module, according to the method, precise matching of protocols is achieved through a three-layer cascade decision-making architecture based on a random forest classifier, stable communication is established in combination with automatic baud rate detection, and distinguishing detection and initialization of front and rear nitrogen oxygen sensors are achieved through dynamic pin state control and power-on and power-off management. And meanwhile, the system has comprehensive data extraction, real-time display and fault diagnosis optimization functions. The method solves the problems of low protocol matching accuracy, insufficient dynamic detection capability, incomplete data extraction, tedious operation, poor system adaptability and the like in the prior art, and has the advantages of high accuracy, strong adaptive capability, high automation degree, good compatibility and the like.

This invention discloses a code-assisted baud rate sampling clock recovery method and system, applicable to the field of optical fiber communication technology. The method includes the following steps: performing matched filtering on the received signal; using the M&M algorithm to complete primary clock recovery on data from an oscilloscope to obtain baud rate sampling data; performing equalization processing on the baud rate sampling data; using a belief propagation algorithm to decode the equalized baud rate sampling data and output reliability estimation information; modulating the reliability estimation information of each baud rate sampling data into a PAM4 auxiliary symbol according to the PAM4 mapping rule; using the PAM4 auxiliary symbol to replace the decision symbol in the M&M algorithm to re-estimate the clock error and perform high-precision clock recovery. This invention, by combining primary and auxiliary clock recovery stages, significantly reduces the bit error rate and provides more stable clock synchronization in high data rate scenarios.

The invention discloses an encoder test method and test system, the encoder test method is applied to an encoder test board, a first end of the encoder test board is connected with an encoder, and the encoder supports a preset protocol; the test method comprises the following steps: when a start bit of a first data frame in feedback data sent by an encoder is detected, starting timing to obtain a first moment; when the start bit of the last data frame in the feedback data sent by the encoder is detected, timing is stopped, and a second moment is obtained; determining a time interval based on the first moment and the second moment; and calculating the Baud rate deviation of the encoder based on the time interval and a preset time interval. According to the mode, the Baud rate of the encoder can be monitored, and the performance of the encoder can be determined based on the Baud rate deviation of the encoder.

This invention discloses an automatic address allocation method for slave devices in a master-slave communication system, belonging to the field of master-slave communication technology. It includes a master device and multiple slave devices, comprising the following steps: After the master device enters the address allocation mode, it sends an automatic address allocation command to all slave devices; after all slave devices receive and identify the automatic address allocation command, they enter the automatic address allocation mode, continuously reply with non-zero data, perform voltage sampling, and use the obtained original or derived voltage value as a unique feature. The master device sends a series of non-zero address codes to form a pulse command, and the slave devices count the pulses, matching them with their own sampled unique features to solidify the address, until a preset termination condition is reached. At this point, both the master and slave devices exit the automatic address allocation mode. This design uses only single-byte frames for master-slave interaction, effectively accommodating low-baud-rate bus protocols and reducing the workload and maintenance costs of long-distance deployment in master-slave communication systems.

The invention relates to the technical field of mine safety monitoring, in particular to a heterogeneous baud rate adaptive communication method for mine safety monitoring, which comprises the following steps: a monitoring substation sends a baud rate synchronization frame to all slave devices; the slave device receiving the Baud rate synchronization frame performs Baud rate switching according to the Baud rate synchronization frame; the monitoring substation sends inspection commands to all the slave devices according to the device cache table, if the slave devices receive the inspection commands, feedback signals are generated and sent to the monitoring substation, and the monitoring substation classifies all the slave devices according to the feedback signals and the device cache table; all the slave devices are divided into A and B types of slave devices; storing the slave devices A and B in an initial baud rate device list; and the monitoring substation performs baud rate self-adaption on the A-type slave devices under a plurality of communication baud rates, determines the optimal baud rate of each slave device, and moves from the initial baud rate device list to the corresponding optimal baud rate device list. The Baud rate can be independently and dynamically adjusted according to the actual communication condition of the equipment.

This invention discloses a serial interface performance testing method and terminal based on baud rate. The method includes: acquiring each serial interface on the device and storing each serial interface in an interface list; traversing each serial interface in the interface list and acquiring each baud rate in a preset baud rate list; sending a preset test data frame through each serial interface at each baud rate, and synchronously acquiring the byte data received by each serial interface at each baud rate; comparing the corresponding test data frame and byte data to obtain the test result. By automatically identifying the serial ports on the device, traversing multiple baud rates, and sending test data frames at each baud rate for each serial port, automatic loop verification is achieved. Based on the result of each verification, the error rate of each serial port is automatically calculated and a performance test report is generated, greatly improving the efficiency of serial port performance testing.

The invention discloses a baud rate self-adaptive switching system of low-power-consumption slave equipment, and relates to the technical field of embedded communication, the baud rate self-adaptive switching system comprises an initialization module, a communication monitoring module, a baud rate switching module, a low-power-consumption management module and a wake-up module, when effective communication signals are monitored, the transmission state of the communication signals is continuously tracked, and when the effective communication signals are monitored, the communication signals are switched to the low-power-consumption slave equipment, and the low-power-consumption slave equipment is switched to the low-power-consumption slave equipment. Recording baud rate information of successful communication, and resetting a communication timeout timer; the communication timeout timer is used for receiving a communication timeout timer, calling a baud rate sequence and sequentially switching the current baud rate of the slave equipment when the timing of the communication timeout timer reaches a first preset threshold value, and triggering the slave equipment to enter a deep sleep mode when the timing of the communication timeout timer reaches a second preset threshold value, and the awakening module is used for awakening the slave equipment when the slave equipment is in the deep sleep mode. And detecting the signal edge change of the communication interface in real time, and triggering the slave equipment to wake up from the deep sleep mode when detecting that a preset signal edge feature is met. The method and the device have the effect of improving the baud rate switching efficiency of the slave equipment.

The invention relates to a marine CAN bus baud rate self-adaption method based on a domestic SOC chip, and the method comprises the following steps: 1, enabling a device equipped with the domestic SOC chip to be connected to a ship-borne CAN networking environment, and collecting a CAN bus signal waveform; step 2, calculating a time interval and a baud rate interval based on the CAN bus signal waveform obtained in the step 1; 3, based on the time interval and the baud rate interval obtained in the step 2, CAN controller sampling parameters are optimized, and then marine equipment CAN bus baud rate self-adaption based on the localized SOC processor is completed. According to the invention, through the CAN controller of the SOC processor and the AD sampling function self-adaption method, the problem of CAN bus abnormity encountered in the upgrading process of marine equipment is solved.

A data transmission method, an apparatus, and a system are provided. An optical device of a transmitter may select one inner-code processing mode from a plurality of inner-code processing modes based on a requirement, and indicate the inner-code processing mode to an optical module of a receiver. The selected inner-code processing mode may be indicated to the receiver by using a PAD sequence, without requiring an additional resource and without changing a baud rate of a data stream. The optical device of the receiver may also detect quality of a current link, to select an inner-code processing mode that matches the quality, and feed back the inner-code processing mode to the transmitter, so that the transmitter can switch the inner-code processing mode based on an indication.

The invention relates to the technical field of identity authentication, in particular to a passport security verification method and system, handshake messages are collected and spliced to generate negotiation state nodes, transfer frequency is counted, and attenuation punishment is introduced to accumulate path cost; and analyzing a global directory to extract the length of a data group, performing Hash dependency mapping, calculating abstract differences group by group after topology dequeuing, judging whether tampering is performed or not, and outputting a verification result. According to the invention, the negotiation state node is constructed by extracting the message abnormal mark and the baud rate, and path accumulation is carried out in combination with the penalty coefficient, so that the passport machine can dynamically evaluate the state of the radio frequency link in the early stage of interaction, and environment interference and abnormal message retransmission are effectively resisted; meanwhile, a directed graph data structure is constructed based on the byte length of a global file and a Hash dependency identifier, a precursor-node-free dequeue sequence is exported by applying topological logic, passport verification is driven to be scheduled and read according to internal association, and structural tampering and forgery for a specific data block are recognized in combination with an abstract comparison mechanism.

A method, system, and apparatus enabled to selectively choose a baud rate for communication of optical data using a modem enabled to operate with an optical signal modulated at plurality of finely tuned baud rates.

The invention relates to the technical field of control or regulation systems, and discloses a special equipment display screen data interaction method with CAN communication. According to the method, CAN bus operation parameters and data frame attribute information are collected, the transmission priority is calculated through multi-dimensional indexes, the Baud rate of sending equipment is automatically recognized, analysis parameters are adjusted, the data cache capacity is dynamically adjusted, and a display screen is controlled to process and display data according to the priority. According to the method, the problems of data transmission congestion, key data delay and poor baud rate compatibility in the prior art are solved, the data transmission integrity and key information timeliness are guaranteed, the method is adaptive to CAN equipment with different baud rates, the method is suitable for a multi-equipment CAN communication data interaction scene of special equipment, and the real-time and safety requirements are met.

The application relates to an artificial intelligence technology and discloses a communication link redundancy method based on double CAN communication, which comprises the following steps: two CAN interfaces and a standby link interface are arranged in a controller, one is selected as a main CAN, and the other is selected as a vice CAN, ID parameters are obtained, the main baud rate and the vice baud rate are calculated; the CAN interface is configured to obtain a control link, the standby link type is determined, the communication protocol is determined, the standby link is connected with the standby link interface and the control link to obtain a double CAN link; a main heartbeat code is selected, a main timer is set and the main heartbeat code is sent, when the main heartbeat code is not received, the vice CAN is switched; a standby timer is set in the vice CAN, when the standby communication link communicates, a standby heartbeat code is sent, and when the controller does not receive the standby heartbeat code, the standby link is switched. The application further discloses a communication link redundancy system based on double CAN communication. The application can improve the efficiency of the communication link.

A communications network includes a bus communicatively coupled to a first device and a second device. The first device and the second device are operable to perform multiple iterations of a baud-rate change (BRC) process. Each of the multiple iterations of the BRC process includes synchronizing the first device and the second device to identify when a baud-rate switch operation will be applied; and applying the baud-rate switch operation to change a currently-used baud-rate of communications between the first device and the second device to a new baud-rate of communications between the first device and the second device.

A clock recovery loop in a digital signal processor for a serializer-deserializer data interface can be modified to achieve fractional lock and operate in a sampling scope mode. The clock recovery loop can control a phase locked loop to produce a clock signal that is at a rational fraction of a baud rate. The clock signal can be used by time-interleaved analog-to-digital converters to achieve oversampling of a periodic signal received over a receive channel. The samples can be used to reconstruct a continuous time signal bit response to characterize or debug the receive channel.

This application relates to the field of computers, specifically disclosing a method, device, and storage medium for locating faulty chips on a computing device. The method includes: sending a first broadcast command to a chip on the computing device at a first baud rate, causing the chip to respond to the first broadcast command and return first response information; determining the number of chips based on the first response information; if the number of chips equals a preset number, sending location information to the chips to cause the chips to write the location information; changing the chip's operating baud rate to a second baud rate, where the second baud rate is greater than the first baud rate, via a configuration command; sending a second broadcast command to the chip at the second baud rate, causing the chip to respond to the second broadcast command and return second response information, the second response information including the location information; and locating the faulty chip based on the second response information. This method enables rapid location of chips in a computing device with damaged PLL circuits.

The invention relates to the technical field of chip test and calibration, and discloses a chip calibration method and system based on a temperature shock mechanism. The chip calibration method is applied to chip full-temperature calibration equipment, and specifically comprises the following steps: S101, acquiring a chip calibration request of an upper computer to construct a temperature shock environment to complete adjustment, then performing temperature shock circulation, and in the temperature shock process, arranging a high-precision thermocouple array in the chip full-temperature calibration equipment, the actual temperature of the packaging surface of the chip is monitored in real time, and data are uploaded to the upper computer; and S102, a delta sigma-ADC circuit is adopted to capture analog parameters at a sampling rate of 100 thousand times per second, and an instantaneous error is calculated through a digital algorithm circuit. The problem of full-temperature-range nonlinear error compensation in traditional calibration is solved, the timing precision is controlled within 5 ppm, the adaptive range of the communication baud rate is expanded to 960 bps to 460 Kbps, and the parameter stability of a military level chip in an extreme environment is remarkably improved.

The invention provides a serial port selection method, device and equipment and a readable storage medium, and is applied to a CPLD (Complex Programmable Logic Device) in UART (Universal Asynchronous Receiver / Transmitter). The method comprises the following steps: receiving a serial port selection instruction issued by an upper computer; the serial port selection instruction carries a baud rate corresponding to a target serial port, and a mapping relation between serial port numbers of optional serial ports and the baud rate is pre-stored in the CPLD; identifying a target serial port according to a serial port selection instruction issued by the upper computer, and connecting the target serial port with the UART path; and generating a corresponding sampling clock and sampling time according to the baud rate corresponding to the target serial port, and completing communication connection with the target serial port by using the sampling clock and the sampling time. According to the technical scheme, the flexibility of serial port switching and the debugging convenience are improved.

This application discloses a data processing method and a data processing apparatus. First data processing is performed on multiple first data streams encoded with a first FEC to obtain m second data streams. Each second data stream undergoes second FEC encoding, and each codeword after second FEC encoding includes N bits, where N = K + S, K represents the number of information bits, and S represents the number of parity bits. Second data processing is performed on each of the m second data streams to obtain m third data streams. Each third data stream includes at least one bit sequence, each bit sequence including P + W bits, where P bits in each bit sequence come from the second data streams, and W bits in each bit sequence are added alignment markers, where P = N × b. Third data processing is performed on the m third data streams to obtain Y modulation symbol streams, each modulation symbol stream being modulated, and the baud rate value of each modulation symbol stream being an integer multiple of the typical Ethernet reference clock frequency value.