26 results about "Parallel port" patented technology

The utility model discloses a track circuit reader test interface switching device, and relates to the field of track circuit equipment. The utility model aims to solve the problem that the traffic safety is influenced because the number of test items of TCR equipment is small. According to the track circuit reader test interface switching device of the utility model, a CAN signal input / output end of a CAN isolation transmit-receive module is used for being connected with a CAN bus of a DB15 connector, and a logic level input / output end of the CAN isolation transmit-receive module is connected with a logic level input / output end of an MCU. The parallel port information input and output end of the MCU is connected with the parallel port information input and output end of the optocoupler, and the optocoupler outputs or receives signals through the external input and output signal test interface module.

The invention discloses a parallel port type hexagonal frequency mixing solid-state transformer and a regulation and control method and device thereof, and the method comprises the steps: under the conditions that the direct-current active power and the alternating-current active power of the solid-state transformer are equal, and the instantaneous active power absorbed by each sub-bridge arm is 0, calculating the frequency of each sub-bridge arm in each sub-bridge arm; the stability relation between the fundamental frequency alternating current port current distribution coefficient and the intermediate frequency alternating current port current distribution coefficient is determined; and calculating a bridge arm circulation current through the stability relationship, thereby calculating to obtain a bridge arm circulation voltage reference value, calculating to obtain a sub-module capacitor voltage reference value of each sub-bridge arm, superposing each sub-module capacitor voltage correction component of each sub-bridge arm, obtaining a corresponding optimized sub-module capacitor voltage, and generating a corresponding modulation signal. By the adoption of the technical scheme, the multi-scene access requirement of the alternating current and direct current hybrid power distribution network is met, and inherent decoupling of three-frequency components including direct current, fundamental frequency and intermediate frequency can be achieved without an additional frequency selection network under the corresponding control method.

The invention belongs to the technical field of wired communication, and particularly discloses an autonomous controllable radio station access gateway device. The system comprises an Ethernet control module, a CPU module, an FPGA module, an audio digital-to-analog conversion module, a serial port interface module and a parallel port acquisition control module, wherein the Ethernet control module is used for realizing network transceiving of data; the CPU module is used for realizing encapsulation and de-encapsulation of audio media streams, serial port data and parallel port data; the FPGA module is used for realizing analysis, coding and decoding of audio, serial port and parallel port signals and network packing transmission work; the audio digital-to-analog conversion module is used for realizing sampling, transmitting and receiving of multiple paths of analog audio signals; the serial port interface module is used for realizing physical layer transmission of serial port signals; the parallel port acquisition control module is used for state acquisition of various input parallel port signals and state control of report and output parallel port signals; therefore, various radio stations and terminal equipment are accessed, differences of different equipment types and communication interfaces are shielded, and a unified network communication platform is established.

The invention provides a clock duty ratio calibration circuit and device applied to a high-speed interconnection parallel port. A duty ratio adjustment module is used for receiving an input clock signal and adjusting the duty ratio of the input clock signal according to a feedback signal; the single-ended to differential module is used for converting the adjusted clock signals into differential clock signals with opposite phases; the narrow-band low-pass filter is used for extracting a direct-current level component of the differential clock signal and outputting a filtering signal; the fully differential dynamic amplifier is used for carrying out differential amplification on the filtered signal and outputting an amplified signal; the integrating capacitor module is used for integrating the amplified signal to obtain an integral voltage; the comparator is used for comparing the first integral voltage with the second integral voltage and outputting a comparison result; and the feedback path is used for connecting the output end of the comparator to the feedback input end of the duty ratio adjusting module to form a closed-loop control loop, so that the duty ratio of the input clock signal is gradually converged to the target duty ratio.

The utility model provides a control circuit for managing a sample frame of a chemiluminescence instrument, and solves the technical problems that the existing detection sample frame needs to adopt a contact mode to obtain the state of the sample frame, and the requirements of large measurement and fast speed measurement of the chemiluminescence instrument cannot be met. The serial-to-parallel circuit and the parallel-to-serial circuit are connected with the controller, and parallel ports of the serial-to-parallel circuit are connected with a plurality of indicating lamps; a parallel port of the parallel-to-serial circuit is connected with a plurality of induction circuits; the plurality of sensing circuits comprise Hall sensors, and the Hall sensors are connected and output data acquired by the Hall sensors through a parallel-to-serial circuit; the controller is used for receiving a loading signal in the Hall sensor, a communication clock signal and serial data, and sending out a control instruction for reflecting the test state of the sample rack; and the serial-to-parallel circuit is used for receiving the control instruction and controlling the level to enable the plurality of indicator lamps to change light. The control circuit can be widely applied to the technical field of control circuits.

The utility model relates to the technical field of parallel port equipment testing, and discloses a parallel port equipment testing tool and a parallel port equipment testing system, and the testing tool comprises a testing device which is used for testing parallel port equipment; the testing device is provided with a testing interface, and the parallel port equipment is provided with an output interface; one end of the switching assembly is in communication connection with the test interface, and the other end of the switching assembly is in communication connection with the output interface; the line sequence definition of the transfer connection line of the transfer assembly corresponds to the interface definition of the output interface, and the interface definition of the output interface corresponds to the type of the parallel port equipment. According to the embodiment of the utility model, the switching assembly is arranged, so that a technician only needs to formulate corresponding switching wires for different parallel port devices, the whole testing device does not need to be customized independently, the parallel port devices of different types can be tested in a compatible manner, and the testing requirements of most parallel port devices are met.

The application discloses to the technical field of power supply control, specifically a bidirectional power supply controller, including bidirectional power supply controller main body, ARM control system and FPGA control system, ARM control system and FPGA control system are installed in bidirectional power supply controller main body, ARM control system includes: first power supply control module, communication control module, first parallel port control module and ADC acquisition module, the output of first power supply control module is connected with communication control module, first parallel port control module and ADC acquisition module respectively.The application adopts the control framework of ARM+FPGA, not only can guarantee the control system of bidirectional power supply, but also can make full use of the respective advantages of ARM and FPGA, realizes a kind of real-time control occasion that can be directly used in various bidirectional power supply such as bidirectional DC / DC, bidirectional AC / DC etc.;ARM and FPGA chip adopt 16-bit data parallel port communication, realizes high-speed data exchange between chips, to meet the real-time requirements of power supply control in algorithm, communication and protection.

The present invention belongs to the technical field of measuring instruments, and is specifically a USB to 25-pin parallel port converter. The USB to 25-pin parallel port converter of the present invention includes a Teensy 3.6 single-chip microcomputer, a parallel port adapter, and a 25-pin parallel port connector; the single-chip microcomputer receives a 16-bit trigger value sent from a computer as a USB serial port device, splits it into two 8-bit integers, and then sets the levels of the pre-set 8 pins in sequence to represent the 8 bits of each integer, and transmits them to the 25-pin parallel port connector through the parallel port adapter to achieve the transmission of 16-bit integers through 8 pins. The present invention is compatible with experimental instruments that can only receive 8-bit integer trigger signals, and can operate normally in desktop or laptop computers, Windows or Ubuntu environments. It solves the problem that modern computers no longer have 25-pin parallel ports and have a small capacity for 8-bit integer trigger information, and improves the possibility of portability in implementing brain science experiments.

This application discloses a neuroelectromodulation device and its control method for synchronous electroencephalogram (EEG) detection. The neuroelectromodulation device includes: an EEG acquisition module configured for multi-channel EEG acquisition via a common electrode; a neuroelectromodulation module configured for multi-channel neuroelectromodulation operation via the common electrode; and an isolation module including a high-speed USB isolation submodule and a parallel port isolation submodule. The EEG acquisition module and the neuroelectromodulation module communicate through the isolation module. In response to the neuroelectromodulation module determining that a modulation signal with a predetermined high voltage will be output via a predetermined modulation channel in the multi-channel configuration, the neuroelectromodulation module activates the modulation component corresponding to the predetermined modulation channel, and the EEG acquisition module synchronously deactivates the analog switch corresponding to the predetermined modulation channel.

The embodiment of the application provides a method for verifying a universal parallel port, which comprises: configuring a clock rollover interval in a comprehensive top layer, so that the clock signal frequency of the universal parallel port to be verified is a set frequency value; configuring a reset signal to be pulled high after a plurality of clock cycles, so that the universal parallel port ends the reset; reading the reset value of a register and a memory after the reset ends, and confirming that the reset value is correct; performing a write-first-read-later operation on the register and the memory, and detecting the read-write function; and verifying the sending and receiving function in a double-machine connection mode. The embodiment of the application utilizes the UVM characteristics, improves the reusability and standardization of the verification environment, realizes highly randomized testing of test cases, makes up for the test points that cannot be found by manpower of the verification personnel, improves the function coverage rate, and realizes comprehensive verification of the uPP module level.

The invention provides a 16-path switching value acquisition circuit, and relates to the technical field of switching value output printed board testing. The circuit comprises an acquisition interface, a photoelectric isolation sub-circuit, a parallel port-to-serial port sub-circuit, an acquisition display sub-circuit, an output interface and a power supply interface, the acquisition interface is used for receiving external 16-path switching value signals, the photoelectric isolation sub-circuit is used for electrically isolating the 16-path switching value signals and outputting isolated acquisition signals, and the output interface is used for outputting the isolated acquisition signals. The parallel port to serial port sub-circuit is used for converting 16 paths of parallel acquisition signals into serial signals, the acquisition display sub-circuit is used for indicating the input state of each path of acquisition signals, the output interface is used for outputting the serial signals and introducing control signals, and the power supply interface is used for providing a working power supply for the whole circuit. The problem that the workload of repeated design and development of a traditional test method is large is solved, the electrical isolation and anti-electromagnetic interference capabilities are enhanced, the signal conversion efficiency is improved, and a real-time state display function is introduced.

The utility model relates to the technical field of data acquisition, in particular to a universal data acquisition preprocessing simulation control daughter card. Comprising a master control module, a power conversion unit, a clock unit and an interface unit. The system is used for controlling various ADC acquisition chips, the ZYNQ chip is adopted to realize the connection of the SPI, the LVTTL discrete line, the 16-bit parallel port, the LVDS interface and the JESD204B interface with the ADC chip of an external acquisition system, a main data acquisition system is assisted to carry out signal preprocessing and execute preliminary data processing or analysis, the function of the main acquisition system is enhanced, and the data acquisition efficiency is improved. And more accurate signal conditioning and faster data processing capability are provided.

The application provides an implementation method and system for controlling laser printing density by using high-frequency data lines. The method and system optimize the output of the raster data stage generated by the printing image, expand the SLCD data from 1 bit to N times, and increase the frequency by N times. Therefore, the duty cycle effect of PWM is simulated by adjusting the ratio of the effective data and the filling data of N bit data, so as to achieve the effect of adjusting the printing data density. The problem that the printing density cannot be controlled in the prior art using the SLCD parallel port to simulate laser printing is solved. By using the method, the effect of the PWM duty cycle can be simulated, and the function is realized.

The application discloses a power supply method for large-scale Chiplet high-speed parallel port interconnection, wherein in a Chiplet interconnection circuit, a plurality of drivers are connected to a TX end, each driver is connected to a transmission link, and a plurality of transmission links are formed; the number of transmission links sharing one LDO is calculated by using a preset algorithm, and the number and distribution positions of required LDOs are obtained according to the number and distance of the transmission links, so that each transmission link is timely supplemented with power charges. In a system in which a plurality of Chiplets work in parallel, the method can ensure that each Chiplet obtains accurate voltage, avoids performance degradation or failure caused by power fluctuations, and thus improves the overall reliability and stability of the system. The LDO in the method is small in size and simple in design, can effectively reduce required external components (such as inductors, capacitors and the like), and thus reduces the overall size and cost of the system.

The invention provides a parallel port communication method of a printer, the printer and a storage medium thereof, and the method comprises the steps: determining the enabling setting of a feedback signal through responding to the feedback signal sent by a host and received from a control interface; when the enabling setting is represented as effective enabling and the data transmission of the state interface is controlled to be in a forward mode, sending a response signal to the host so as to notify the host to transmit a command word signal; in response to the command word signal received from the control interface, determining support setting of the command word signal in the printing processor according to the type of the command word signal; when the support setting is represented as support, data transmission of the state interface is controlled to be in a reverse mode, and a first acquisition signal is sent to the printing processor to acquire a feedback parameter corresponding to the printing processor; and when the feedback parameter is received, the feedback parameter is sent to the host through the state interface, so that bidirectional communication is realized based on the hardware-based parallel port controller, and the stability of a communication time sequence is improved while processing resources are saved.

The invention discloses an ARM (Advanced RISC Machines) and FPGA (Field Programmable Gate Array) board-level communication method and device based on a FLEXBUS interface, ARM and FPGA communication is realized through the FLEXBUS interface, the interface supports high-speed data transmission and meets the requirements of large data volume and high real-time performance, the transmission rate and the data throughput are obviously superior to those of a traditional communication mode, the data bit width of the FLEXBUS interface is configurable, the data transmission efficiency can be optimized, and the data transmission efficiency is improved. The method is suitable for different application scenes, configuration parameters transmitted when an upper-layer application runs are analyzed at the ARM host end, FLEXBUS interface parameters are configured through a spidev driving interface, it is ensured that communication parameters are accurate and stable, in the data transmission process, the FPGA slave end analyzes verification data frames, data correctness and completeness are ensured, the ARM host end verifies data consistency, the error rate is calculated, the communication reliability is improved, and the data transmission efficiency is improved. In addition, the FPGA slave end can also convert the data into a parallel port communication format, uninterrupted transmission of data streams is achieved, in addition, a spidev driving interface provides a uniform interface for upper-layer application, and the interaction process is simplified.

The application relates to the new energy field and provides an address allocation method, a multi-device system and a storage medium. When an address allocation request is received through a first parallel port, the address allocation function of other parallel ports except the first parallel port is disabled, an address allocation instruction is sent to the first parallel port, and when an address configuration completion instruction is received through the first parallel port, the address allocation function of other parallel ports except the first parallel port is enabled. The above method can sequentially allocate addresses for slave devices, thereby improving the accuracy of address allocation.

The invention discloses a high-performance logic controller, which relates to the technical field of industrial automation control, and comprises an ARM core control module, and the ARM core control module is connected with a memory module and is used for storing system programs and user programs; the ARM core control module is also connected with a programmable logic module FPGA (Field Programmable Gate Array) and is used for controlling output and reading an input state through parallel port communication; the parallel port of the programmable logic module FPGA is connected with an IO expansion module which is used for expanding a plurality of inputs and outputs; the programmable logic module FPGA is also connected with an LVDS (Low Voltage Differential Signaling) module for an LVDS communication interface; the ARM core control module is further connected with an Ethernet module used for a network port communication interface, an RS232 module used for a serial port communication interface and a USB module used for a USB communication interface, and the IO expansion module is connected with an input module and an output module. On the premise that stability and reliability are guaranteed, the data transmission rate reaches hundreds of megabytes, input and output of control signals can reach hundreds or more, and the price is low.

The invention discloses a data caching device, and belongs to the technical field of data caching. The invention aims to solve the problems of data loss, high delay and low resource utilization rate in a multi-port and burst data stream scene caused by fixed bandwidth allocation and static memory management of the existing cache device. Therefore, the device comprises a self-allocation dynamic flow control module which selects an arbiter to detect a port by circularly inputting the highest bit of data, and dynamically allocates bandwidth according to the real-time working intensity of the port to realize flow balance; and the improved consistent Hash memory space management module adopts a two-stage Hash ring structure with three-stage permission of'child node-main node-main storage 'to realize dynamic allocation and instant recovery by package of the memory space. The method is implemented in the FPGA and supports 16 parallel ports, the bandwidth of each port is 16 Gbps, and the high efficiency and reliability of water pump axial force detection data caching are remarkably improved.

This application provides an address assignment method. According to the method, when an address assignment request is received through a first parallel port, an address assignment function of a parallel port other than the first parallel port is disabled; an address assignment instruction is sent to the first parallel port; and when an address configuration complete instruction is received through the first parallel port, the address assignment function of the parallel port other than the first parallel port is enabled.

The invention discloses a parallel port debugging method and tool based on a USB virtual serial port, and relates to the technical field of embedded development debugging. The core of the method is that indirect communication between a debugging host and a debugged device parallel port is realized through a USBCDCACM standard virtual serial port, and a host mode and a slave mode are supported. As special hardware, the tool comprises a microcontroller, a USB (Universal Serial Bus) interface, various bus interfaces, a control line interface, a peripheral circuit and an optional two-way selection module, and supports multiplexing of an address bus and a data bus. Dedicated drivers and dedicated debugging equipment are not needed, debugging of various parallel ports can be completed only through universal serial port debugging software, the debugging process is simplified, the development cost is reduced, the debugging efficiency is improved, application scenes such as virtual parallel port equipment software development can be expanded, and the application prospect is wide. The method is suitable for parallel port debugging scenes of peripherals such as an LCD screen, an extended memory interface (FSMC in STM32) and the like.

The invention provides a 16-path switching value output circuit, and relates to the technical field of switching value acquisition printed board testing. The circuit comprises an input interface, a serial port-to-parallel port sub-circuit, an output driving sub-circuit, an output display circuit, a relay output sub-circuit and an output interface, the input interface is used for introducing external serial control signals, power supply signals and switching value signals, the serial port-to-parallel port sub-circuit is used for converting the serial signals into 16 paths of parallel control signals, and the output driving sub-circuit is used for outputting the 16 paths of parallel control signals. The output driving sub-circuit is used for converting a parallel control signal into a large-current driving signal, the output display circuit is used for indicating the output state of each path of driving signal, the relay output sub-circuit is used for providing a large-voltage large-current switching channel, and the output interface is used for outputting 16 paths of switching value signals and leading out a loop wire. The problem that the workload of repeated design and development of a traditional test method is large is solved, the signal driving capacity and the anti-interference performance are improved, modular combination use is supported, and the test efficiency is improved.

The application discloses a COB liquid crystal display module with a serial and parallel port and a Chinese character library, which comprises a control module, a driving module, a display screen, an input interface module and a backlight module, the input interface module receives a backlight power signal and transmits the backlight power signal to the backlight module and the control module, the control module converts the backlight power signal into a corresponding control signal and transmits the control signal to the driving module, and the driving module controls the starting, closing and display of different brightness of the display screen according to the corresponding control signal; the driving module is used for controlling the display screen; the display screen is used for displaying subtitles; and the input interface module comprises a 20PIN serial and parallel port circuit; by adopting five NT7065 chips to replace AIP31021 (ST7921, UCI7921) chips in the prior art, the application effectively solves the problem that the production capacity of the AIP31021 (ST7921, UCI7921) chips cannot be supplied, and the cost is reduced; the market price of the NT7065 chip is far lower than that of the AIP31021 (ST7921, UCI7921) chip.

This application relates to a frequency converter, comprising: multiple unit modules, which can be combined to form the main circuit of the frequency converter, each unit module being provided with a connection port and a first communication port; a control unit, which is provided with multiple second communication ports and is communicatively connected to the first communication port of each unit module through the multiple second communication ports; and a unit connector, which is provided with multiple parallel ports and is connected to the connection port of each unit module through the multiple parallel ports.

This application discloses a parallel-to-serial conversion control system and chip for parallel data. The parallel-to-serial conversion control system is connected to an external circuit so that the parallel port of the external circuit used for outputting parallel data is not exposed externally. The external circuit is used to transmit parallel data to the parallel-to-serial conversion control system. The external circuit is a circuit located outside the parallel-to-serial conversion control system and has a parallel port. The external circuit supports the conversion of input signals into the parallel data. The parallel-to-serial conversion control system exposes a conversion result port for outputting serial data, so that the external system can detect the conversion result of the parallel data in the parallel-to-serial conversion control system through the conversion result port. The bit width of the conversion result is less than the bit width of the parallel data.