221 results about "Bus mastering" patented technology

The invention discloses a concurrency control method and device, electronic equipment, a storage medium and a product. The method is applied to a concurrency control system comprising a processor and a bus controller, and comprises the steps that the processor responds to an atomic operation request of a target thread and sequentially sends a storage area switching instruction and a register operation instruction to the bus controller; the bus controller responds to the storage area switching instruction and the register operation instruction, executes storage area switching operation, generates a bus occupation maintaining signal and continuously executes register read-write operation in a target storage area; the processor sends a scheduling request to an operating system, so that the operating system improves the priority of the target thread to be a first priority; and the bus controller generates a bus release signal after the atomic operation of the target thread is finished. According to the scheme, through cooperation of the processor and the bus controller, atomized execution of thread Bank switching and register reading and writing is achieved, and the concurrency performance is improved while the reliability and consistency of data are ensured.

The invention discloses an anomaly detection method and device for a communication bus, the anomaly detection method and device are applied to a system-on-chip, the system-on-chip is integrated with a bus controller and a central processing unit running driving software, and the anomaly detection method comprises the steps that the bus controller monitors a clock line of the communication bus after the communication bus enters a data transmission state; under the condition that the duration of the low level of the clock line exceeds a preset duration, judging that the clock line is abnormal, and generating an interrupt signal; reporting the interrupt signal to a central processing unit; the driving software reads the state information of the bus controller through the central processing unit; analyzing the state information, and determining an expected state of the bus controller to the clock line; under the condition that the expected state is the low level, determining that the equipment causing the clock line abnormity is a bus controller; and under the condition that the expected state is the high level, determining that the equipment causing the clock line abnormity is the external equipment. Therefore, manual intervention can be reduced, and the problem solving efficiency and the system reliability are improved.

The invention relates to the technical field of servers, and discloses a conflict processing method and device. The method comprises the following steps: acquiring a state value of a first register from a bus state management chip under the condition that a first computing node determines that an access request needs to be sent to a bus arbitration chip; when the access request is a super control right access request and the state value of the first register is a second state value, a control request is sent to a bus state management chip, and the control request is used for requesting to use a bus super control right; and after the state value of the first register is updated to the first state value from the second state value and the state value of a second register corresponding to the first computing node is updated to the first state value, sending the access request to a bus arbitration chip. Therefore, effective management of the bus control authority is realized, and access conflicts are avoided.

An apparatus and a method for performing an authenticated encryption with associated data (AEAD) operation of an encrypted instruction and a golden tag stored in a memory device in an event of a cache miss are provided. The apparatus includes a bus control circuit, a block buffer, a tag buffer and an AEAD circuit. The bus control circuit receives a read address from a cache for reading the encrypted instruction and the golden tag from the memory device. The block buffer receives and stores the encrypted instruction from the bus control circuit, wherein a size of the block buffer is preset to be N times a size of one cache line. The tag buffer receives and stores the golden tag from the bus control circuit. The AEAD circuit performs the AEAD operation upon the encrypted instruction and the golden tag to check whether the encrypted instruction is tampered or not.

The invention relates to a single-machine obstacle avoidance method and system based on a millimeter wave radar and a camera, and the method comprises the steps: transmitting a frequency modulation continuous wave signal through the millimeter wave radar, collecting and preprocessing environment original data, and outputting a target list; based on the target list, when the target meets a preset signal-to-noise ratio condition and the speed exceeds a preset speed threshold value, triggering a camera to collect an image, performing real-time classification on the image through a lightweight convolutional neural network model, and outputting a classification result and a bounding box; performing space-time alignment on a target list and a classification result, dynamically allocating weights of radar data and visual data by adopting a confidence weighted fusion algorithm, associating the same target through distance calculation, and outputting a fused target attribute; based on the fused target attributes, constructing a three-dimensional decision matrix, and generating an obstacle avoidance strategy according to a preset priority rule; and converting the obstacle avoidance strategy into a bus control instruction, and controlling the vehicle to execute a corresponding alarm or brake response action.

The invention belongs to the technical field of new energy power, and particularly relates to an unmanned aerial vehicle hydrogen fuel cell hybrid power system and a control method thereof. The system comprises a fuel cell stack which is used for providing a reference power supply and has adjustable power output; the super capacitor bank is used for outputting peak current when transient high power is needed, and has the characteristics of high power density and quick response; the lithium iron phosphate battery pack is used for providing an emergency power supply when the fuel cell fails; the dynamic bus controller integrates the voltage hysteresis comparator and the CAN bus communication module and is used for controlling energy output of the fuel cell stack, the super capacitor bank and the lithium iron phosphate battery pack; the LSTM neural network prediction module is used for predicting a future power demand according to the flight attitude, the meteorological data and a historical load curve and triggering power climbing of the fuel cell in advance; and the Buck-Boost circuit is used for the fuel cell to directly charge the super capacitor bank, so that the dynamic response speed and the system stability of the unmanned aerial vehicle in a violent maneuvering state are remarkably improved.

Provided in the present disclosure is a connector port multiplexing apparatus, comprising: a latch reset circuit, which is electrically connected to a first voltage source and a power terminal of a universal serial bus connector, and is configured to output a control signal on the basis of a first voltage that is output by the first voltage source and a second voltage from the universal serial bus connector; and an analog switch circuit, a control terminal of which is electrically connected to an output terminal of the latch reset circuit, a first terminal of which is electrically connected to a first signal transmission terminal of a universal serial bus controller, a second terminal of which is electrically connected to a second signal transmission terminal of the universal serial bus controller, and a third terminal of which is electrically connected to a multiplexing signal transmission terminal of the universal serial bus connector, wherein the analog switch circuit is configured to establish, on the basis of the control signal, a connection path between the first terminal and the third terminal of the analog switch circuit or a connection path between the second terminal and the third terminal of the analog switch circuit.

The invention discloses a communication link automatic selection and concurrent transmission method under a helicopter limit condition, and relates to the technical field of aerospace. Comprising the following steps: firstly combing airborne communication link information, retaining four types of links including a satellite, an ultra-short wave, a short wave and a data transfer radio, and collecting parameters by means of a bus controller; filtering the data by using a Kalman filtering algorithm, and removing abnormal data through threshold verification; and finally outputting stabilized data. Determining a task scene and an environment scene based on the stabilization data in combination with airborne control screen task selection and environment sensor data; according to the technical key points, a fault precursor monitoring technology is adopted, a standby link pre-activation technology is combined, a seamless switching mechanism is matched, the defect that an existing system depends on manual switching is overcome, the automatic switching time of the link is shortened to be within 0.5 second, the communication interruption rate under the limiting condition is reduced to be lower than 5% from 30% or above, the real-time communication requirements of rescue, patrol and the like are met, and the real-time communication efficiency is improved. Good use prospects are realized.

The invention discloses a communication conflict detection control method and device, equipment and a storage medium. The method comprises the following steps: controlling a bus slave station module to send a request signal containing a unique feature identifier to a bus; the control bus master station module monitors the bus in real time; controlling the bus master station module to identify the bus slave station modules participating in the conflict; controlling the bus master station module to distribute different sending time slots for the identified conflicting bus slave station modules; the control bus master station module broadcasts a control frame comprising a conflict slave station module list and a corresponding sending time slot; controlling each conflict slave station module to perform local clock synchronization according to the distributed sending time slot after receiving the control frame; controlling each conflict slave station module to send data to the bus in the synchronized sending time slot; and the control bus master station module enters the next round of monitoring period after each conflict slave station module completes data transmission. According to the invention, accurate positioning and identification of bus communication conflicts can be realized, communication resource allocation is optimized, and communication efficiency is improved.

The invention belongs to the technical field of vehicle control, and discloses a networked automobile CAN bus control method and system, and the method comprises the steps: analyzing multi-source data of a networked automobile, constructing a multi-level control architecture based on an analysis result, setting a condition threshold value between control levels, and employing a genetic algorithm to dynamically optimize the condition threshold value as a control threshold value; constructing a threshold prediction model by using a time sequence prediction algorithm, predicting the state and operation scene change of an electronic control unit in the networked automobile by combining the obtained historical multi-source data, and generating a control prediction threshold; and in combination with the control threshold value and the control prediction threshold value, generating a cooperative control value through a cooperative recommendation strategy, and formulating a corresponding control strategy. According to the invention, a multi-level control architecture is constructed through multi-source data analysis, a communication threshold is dynamically optimized in combination with a genetic algorithm, the CAN bus load is reduced, the communication efficiency and real-time performance are improved, key message delay is avoided, and the stability and resource utilization capability of a vehicle-mounted network are enhanced.

This invention relates to the field of vehicular network testing technology, and discloses a domain controller network testing system, method, and apparatus. The system includes multiple vehicular Ethernet converters, Ethernet switches, and bus controllers. Each vehicular Ethernet converter is connected to a domain controller under test, and each vehicular Ethernet converter is also connected to the Ethernet switch. Each domain controller under test is also connected to the bus controller. The Ethernet switch and the bus controller are both connected to a host computer. The host computer is configured to: receive on / off configurations for the channels between the Ethernet switch and at least one of the domain controllers; receive test requests and send test signals to the bus controller; and acquire messages transmitted and received at a specified bus listening port or mirror port to obtain test results. This invention enables arbitrary channel configuration between domain controllers, meeting various testing requirements.

This application discloses a method and apparatus for detecting anomalies in a communication bus, applied to a system-on-a-chip (SoC). The SoC integrates a bus controller and a central processing unit (CPU) running driver software. The method includes: after the communication bus enters a data transmission state, the bus controller monitors the clock line of the communication bus; if the clock line remains low for a preset duration, it determines that the clock line is abnormal and generates an interrupt signal; the interrupt signal is reported to the CPU; the driver software reads the status information of the bus controller through the CPU; analyzes the status information to determine the desired state of the clock line for the bus controller; if the desired state is low, the device causing the clock line abnormality is identified as the bus controller; if the desired state is high, the device causing the clock line abnormality is identified as an external device. This reduces manual intervention, improves problem-solving efficiency, and enhances system reliability.

The invention discloses an I2C bus control chip and an I2C bus control method, and the I2C bus control chip comprises a control processor which is connected with a main device, and the main device is connected with the control processor through a clock signal line and a data signal line; each control circuit is connected with the corresponding master device and slave device, and the control end of each control circuit is connected with the control processor; wherein the slave device and each master device are respectively connected with the I2C bus control chip through a clock signal line and a data signal line of the I2C bus, the control processor accesses the corresponding master device to the I2C bus through the control circuit according to a switching instruction, and the switching instruction is composed of a specific clock signal and a specific data signal. It can be ensured that only the single master device is allowed to establish effective connection with the slave device at any time, and the problem of bus competition is solved.

The invention relates to the technical field of automobile electronic testing, in particular to a script-based vehicle-mounted radio frequency receiving module automatic testing method. The method comprises the following steps: constructing a test execution environment configuration structure by integrating an equipment list, physical connection information and historical test records; performing test case parameter extraction, multi-channel operation time sequence arrangement and mapping of RS232 and CAN bus control commands to generate a configuration structure capable of driving script execution; binding a high-frequency test scene and a control channel, expanding a specific instruction sequence, controlling the triggering of a power supply and a radio frequency signal, and completing the collection of test response data; and performing timestamp alignment, protocol analysis and statistical comparison on the response data, generating a test report and updating a test case execution record. According to the method, whole-process automation of test environment modeling, script driving configuration, test execution and result analysis is achieved, the test efficiency and reliability are remarkably improved, and good reusability is achieved.

The application relates to the field of motion control, in particular to an intelligent slave station based on a dispensing application and a control method, which converts parameter information obtained from an internal bus control module into trigger signals corresponding to glue valves, cameras and needle valves in a dispensing system through a position comparison module, accurately controls the timing of glue opening through dispensing control of the glue valves, photographing timing of the cameras and needle valve needle matching, realizes accurate control of the glue valves, realizes different glue covering effects through control of the motion speed of the glue valves and the spraying frequency of the glue valves, and realizes position point number setting through setting of a data buffer FIFO, removes position data after comparison and trigger output from the data buffer FIFO, leaves space for subsequent position data, and realizes efficiency improvement and position point number setting increase.

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.

Provided in the embodiments of the present application are a bus circuit for two master devices, and a bus control method and apparatus for two master devices. The bus circuit comprises a first master device, a first bus buffer, a second master device, a second bus buffer, an input / output expander, a watchdog, a NOT gate and a bus control chip, wherein the first master device is connected to the first bus buffer by means of an integrated circuit bus, and the first bus buffer is connected to the bus control chip by means of the integrated circuit bus; the second master device is connected to the second bus buffer by means of the integrated circuit bus, and the second master device is further connected to the input / output expander by means of the integrated circuit bus; the input / output expander is further connected to the first master device, and the input / output expander is further connected to the watchdog; the watchdog is further connected to the NOT gate; the NOT gate is further connected to the first bus buffer; and the watchdog is further connected to the second bus buffer. By means of the present application, the conflict problem in the related art of two master devices competing for bus control rights is solved.

The invention provides a universal bus control system and method, and the system comprises a user interface which is used for transmitting an initialization configuration signal, receiving an initialization configuration completion signal, and transmitting and receiving data; the bus main system is connected with the user interface and is used for completing configuration according to the initial configuration signal, so that the bus main system meets a communication protocol corresponding to the interface type of the target interface; the N level transceivers are connected with the bus main system; the level transceiver connected with the target interface is used for completing configuration according to the initialization configuration signal, so that the level transceiver meets a communication protocol and a level type corresponding to the interface type of the target interface; and under the condition that the bus main system and the N level transceivers finish configuration according to the initialization configuration signal, the user interface realizes data transceiving with the M target interfaces through the bus main system and the N level transceivers. According to the invention, multiple types of communication protocols and interfaces can be realized at the same time or in a time-sharing manner under one set of bus system.

This invention relates to the field of EtherCAT bus control, and more particularly to a multi-axis compliant interpolation synchronization method based on EtherCAT. This invention calculates the maximum distribution quantity d. max The maximum distribution L during the increasing phase of the distribution is below. ac The maximum distribution L during the decreasing phase of the distribution de According to L ac +L de With l rem The invention determines the starting segment number N0, ending segment number N1, ending segment number N2, and total interpolation segment number N3 based on the magnitude of the distribution increase. It then calculates the required main axis distribution for the first N interpolation cycles and uses this calculated main axis distribution to calculate the slave axis distribution. This invention improves the speed smoothness of the cutting machine, reduces interpolation cycles while maintaining cutting accuracy, increases operating speed during intermediate interpolation cycles, and does not affect the vibration caused by corner speed changes at the transition points.

The application discloses a communication conflict detection control method, device and equipment and a storage medium. The application controls a bus slave module to send a request signal containing a unique feature identifier to a bus; controls a bus master module to listen to the bus in real time; controls the bus master module to identify bus slave modules participating in a conflict; controls the bus master module to allocate different sending time slots to the identified conflict bus slave modules; controls the bus master module to broadcast a control frame containing a conflict slave module list and corresponding sending time slots; controls each conflict slave module to perform local clock synchronization according to the allocated sending time slots after receiving the control frame; controls each conflict slave module to send data to the bus in the synchronized sending time slot; and controls the bus master module to enter a next round of listening period after each conflict slave module completes data sending. The application can realize accurate positioning and identification of bus communication conflicts, optimize communication resource allocation, and improve communication efficiency.

A bus configuration system includes a plurality of driver integrated circuits (ICs) coupled sequentially on a daisy chain, and a bus controller coupled to the plurality of driver ICs. Each driver IC includes a plurality of ports. The bus controller is used to generate a port definition code for configuring each port of the each driver IC. The bus controller includes a clock output port used to output a clock signal and a data output port used to output a data signal. When a port of the plurality of ports detects the clock signal, the port is configured as a clock input port.

The invention discloses a communication method for an SPI bus controller and a screen IC based on an LK stage. The communication method comprises the following steps that a, SPI controller hardware is configured, a GPIO function mode function is dynamically configured, and a register structural body is created; b, an SPI controller initialization function is configured, SPI communication behaviors are customized based on SPI controller parameters, and a data sending end sequence mode is configured; c, a data receiving function and a data sending function are packaged, the data receiving function directly reads the data from the receiving register, and the data sending function processes the data and then sends the data to the screen IC; and d, initializing the screen IC. According to the method, register access and control, read and write function packaging and platform embedding of the SPI bus controller are carried out in the LK stage, so that the SPI bus controller is called to receive and send data in the LK stage, the purpose of efficiently and accurately completing data receiving and sending is achieved, and the method has the advantages of being high in transmission rate, short in overall startup time and the like.

The application belongs to the technical field of solid-state remote power distribution device uniform type of aircraft electromechanical system, and particularly relates to a solid-state remote power distribution device uniform type design method and system. First, system requirements are collected, all power loads needing solid-state remote power distribution device secondary power distribution are divided according to locations, the rated current of all SSPC channels is obtained, and the rated current is upwardly compatible. The SSPC channels in the bus control mode and the SSPC channels in the override control mode are collectively classified as type 1. Each power output of the solid-state remote power distribution device is only bound with the power busbar input in the current location and is decoupled with the power supply on the aircraft. The uniform type is performed from four aspects of power distribution load area, SSPC channel current size, SSPC channel control mode and SSPC channel belonging busbar, so as to ensure that the hardware and software of the same type device are completely the same, the device is installed in different locations according to the recognition of the machine position, different software is executed, and the design cost, later stage support cost and management cost can be reduced.

This invention discloses a motor control system, relating to the field of motor technology. It includes a data acquisition module, a switching module, an analog module, a transmission module, and a monitoring module. The data acquisition module acquires bus voltage values ​​and switching signals. The switching module switches the power source mode based on the bus voltage values ​​and switching signals. The analog module transmits analog signals from the CAN bus controller to the original equipment controller in electric mode. The transmission module transmits remote motor controller data and winding encoder data to the vehicle controller. The monitoring module controls the motor based on the remote motor controller data and winding encoder data. Through multi-module collaboration, the system can automatically switch between electric and fuel modes based on bus voltage values ​​and switching signals. Data transmission employs an anti-interference design. In terms of safety protection, it provides precise response from alarm to emergency stop, giving the system significant advantages in reliability, compatibility, and economy.

The calibration method and calibration device of current detection and current protection mechanism, the calibration device comprises: a master control unit, an interface conversion unit, an electronic load generation unit and a power transmission function detection unit; the electronic load generation unit provides an electronic load, so that the universal serial bus control chip outputs a load constant current and corresponds to the load constant current, and generates an analog-to-digital conversion value by using at least one preset conversion parameter; the master control unit inputs and corresponds to the analog-to-digital conversion value, generates and stores a to-be-calibrated output current by using a to-be-calibrated current back-propagation operation method and at least one preset conversion parameter, generates at least one calibration conversion parameter by corresponding to the load constant current and the to-be-calibrated output current and using a conversion parameter calibration method, and replaces at least one preset conversion parameter in the universal serial bus control chip with at least one calibration conversion parameter, so that the universal serial bus control chip generates calibrated analog-to-digital conversion values by using at least one calibration conversion parameter and can correctly start the overcurrent protection mechanism.

The embodiment of the application provides a kind of bus controller's verification device, method and system.The verification device includes: virtual processor and verification module;Virtual processor includes the virtual bus controller to be measured;Wherein, virtual processor and the virtual bus controller to be measured are hardware description file;Virtual processor is used to send bus control instruction to verification module by communication module according to the verification demand issued by host computer;Verification module is used to carry out bus data frame transmission with the virtual bus controller to be measured by bus transceiver according to bus control instruction;Host computer is used to verify the virtual bus controller to be measured according to the bus data frame received by the virtual bus controller to be measured.The scheme can verify the prototype of bus controller, can detect the error in design stage, and developer can modify the design of bus controller according to the verification result, reduce the cost and time loss caused by failure in later period.

A bus control unit includes: a compression execution unit, configured to compress sparse data by using a compression algorithm, to obtain compression data and compression attribute information; and a compression control unit, configured to generate, according to an instruction format of a communication bus, a data signal carrying the compression attribute information and the compression data, and send the data signal through the communication bus, where the compression attribute information is used for decompressing the compression data to obtain the sparse data.

The invention discloses a bus-based static lamplight landing assisting system for a shipboard helicopter. The static lamplight landing assisting system for the shipboard helicopter comprises a control panel, a landing assisting system control box, a static landing assisting lamp, a landing signal lamp repeater and a buzzer. And the control panel is in communication connection with the landing assisting system control box. The landing assisting system control box, the static landing assisting lamp, the rising and falling signal lamp repeater and the buzzer are all located in the same CAN bus control network. The method has the advantages that helicopter landing assisting tasks of small and medium-sized ships such as law enforcement ships are protected, and the method has high practical value.

The embodiment of the present application relates to a kind of bus control system and method, comprising: controller unit, for running target service software, by target service software, each described PXI\PXIe board card generates corresponding LXI equipment;Receive the target command sent by main control unit;Determine the target LXI equipment corresponding to target command, and control target LXI equipment by target command;PXI\PXIe board card, connect with controller unit, for receiving and responding target command;Main control unit, connect with controller unit by target network cable, for generating target command.Thereby, it can be realized by a network cable to control all PXI\PXIe board card in whole system, and each board card is virtually different LXI equipment, replace the board card in instrument case can be combined into different test system.And the part of main control computer control work is placed in LXI bus equipment.Simplify the development process of using PXI\PXIe board card to develop LXI bus instrument, reduce cost.

1. The name of the design product: bus control valve. 2. The use of the design product: can be used alone, also can cooperate with various types of multi-way valve products to realize the closed-loop control of bus communication type. 3. The design points of the design product: in shape. 4. The picture or photo that can best show the design points: design 1 perspective view. 5. Design 1 is specified as the basic design.