Showing papers on "Serial port published in 2021"

Design of Smart Home Control System Based on Wireless Voice Sensor

Abstract: With the rapid development of economy, science, and technology, people have higher and higher requirements for the quality of home life, and smart home systems are required to have higher convenience and comfort. The continuous development of embedded technology, short-range wireless communication technology, and microcontroller technology provides a new development direction for the research and development of smart home systems. Under the premise of fully studying the research status and development trend of smart home systems, this paper combines embedded technology, ZigBee wireless communication technology, voice recognition technology, GSM communication technology, etc., and proposes a ZigBee-based smart voice home appliance control system. The system adopts ZigBee wireless communication to form a comprehensive management system for household electrical appliances, electronic and electrical equipment, etc., for household electrical control, intelligent security, and environmental monitoring. This paper designs the overall scheme of a smart home control system based on voice recognition technology. According to this scheme, the hardware and software of the system are designed, and the wireless communication method combining Wi-Fi and RF (radio frequency) of the system is also determined. In order to make the system more humane, two sets of control schemes, voice control and button control, are designed according to the system’s functional requirements. In the voice control solution, the user first reads the control commands set in the voice library on the smart terminal, and then, the system automatically recognizes the commands read by the user. After the recognition is successful, the user can control the home appliances through the command. In the key control scheme, users can control home appliances through keys on the smart terminal. The upper computer transplants the audio library and the algorithm studied in this paper to realize the audio collection and storage, the confirmation of family members, and the recognition of voice commands; the lower computer is used for real-time collection of environmental information and wireless control of home facilities. After the system is started, the family members are first confirmed by voice, and then, the voice command recognition result and real-time environmental information jointly decide to form a control command. The upper computer sends the control command to the lower computer through the serial port to control the corresponding home equipment. The system is tested and analyzed under experimental conditions. The test results show that the system can control home facilities through voice commands combined with real-time environmental information while confirming family members.

The Research of an On-demand Threaded Interrupt Technology of Serial Port Based on the Power Edge Smart Device

Abstract: At present, the common problems facing the low-voltage power distribution system lie in plenty of equipment and wide range of power distribution. In order to address these problems, the overall architecture of the cloud-pipe-side-end is introduced through the IoT system in electric power distribution, where the end device is connected to the low-voltage power distribution system via the serial bus of the edge device and carries on data collection and real-time edge computing. As the core node, the edge device is required to have excellent real-time capability of timely detection and real-time response to the fault of various low-voltage power distribution facilities. In consideration of this, this paper proposes an on-demand serial port interrupt threading design to ensure the real-time performance of an electrical edge smart system. According to the experimental results, as the number and load of serial port devices increase, the real-time task dispatching rate continues to decline until the transformation, and the impact on the real-time task dispatching rate is limited after the threaded interrupt. That is to say, the method is effective in ensuring the dispatching rate of real-time tasks for the edge smart terminals.

A Multi-interface Data Acquisition Gateway Based on 6LoWPAN for Multi-sensor Situation

Abstract: The IPv6 over Low Power Wireless Personal Area Network (6LoWPAN) has been used in many areas. How to reduce the number of 6LoWPAN nodes in multi-sensor situation needs to be studied. This paper describes the design and implementation of a multi-interface data acquisition gateway based on 6LoWPAN. The gateway has 6 kinds of data acquisition interfaces, including RS485, CAN, LoRa, ZigBee, 4G and GPRS. Modbus is the protocol of these interfaces' application layer. The gateway is designed with a modular approach, which is easy to be extended or tailored for other applications. Since the acquisition task quantity of the gateway changes with the configuration, and has the characteristics of multi-task synchronization and realtime response, the software design of the gateway is based on the FreeRTOS real-time system to meet the above requirements. In the 6LoWPAN network, the acquisition gateway acts as a 6LoWPAN node. After configuring the gateway through serial port, the gateway first reads sensor data from the interface and then sends the data to the 6LoWPAN module. The test results show that the gateway can read the sensor data correctly according to the configuration requirements. The purpose of using the multi-interface and bus protocol is to reduce the number of 6LoWPAN nodes required in the multi-sensor situation, thus reducing the routing complexity of the 6LoWPAN network, system cost and power consumption.

Built-In Self-Test Circuits for High-Speed JESD204B Transceiver Controller

Abstract: JESD204B high-speed serial interface is widely used in giga-bit-per-second serial data transaction between ADCs and Application Specific Integrated Circuits (ASIC). According to the complex characteristics of JESD204B system structure, this paper proposed a built-in self-test (BIST) circuits for JESD204B system. By adding Pseudo Random Binary Sequence (PRBS) generator and checker in the critical path, the function of the key module can be verified easily. Moreover, two optional loop-back paths are added in the JESD204B system, which can connected the transmission link and receiving link directly, and makes the test more flexible and effective at the same time. On one hand, the proposed BIST circuits are verified under a FPGA development platform. On the other hand, a 10-Gbps JESD204B transceiver chip with the proposed BIST circuits is fabricated with a 55-nm CMOS process. Both of them proved that the proposed BIST circuits are effective.

Design of Dual Serial Communication System Based on Stm32f103.

Abstract: The dual serial communication software based on STM32F103 is used for dual computer communication. It runs on the embedded processor STM32F103 series chip. The software can realize the communication between STM32F103 series microprocessors by serial port, and the serial communication rate can be set as 2400, 4800, 9600, 19200,… The communication mode can be selected as simplex, half duplex and full duplex. The maximum communication distance is 10 m.

Design of NOR FLASH data read-write controller based on FPGA

Abstract: In order to solve the problem of local non-volatile storage of a large amount of parameter data when the embedded platform processes a large amount of image data. A high-speed data read-write controller of 128Mbit Flash N25128A13ESEA0F is designed and implemented based on Xilinx K-7 series FPGA using VHDL hardware description language. The PC computer sends the data to the Flash controller through the serial port. And the controller stores the data in the designated location of the Flash. When the embedded platform is powered on next time, this controller can automatically read the required data and provide it to the FPGA internal high-speed image processing logic unit for use. The controller can work at a working frequency of 50MHz with a data throughput rate of 25MByte/s. And this design of Flash read-write controller can meet the basic requirements of an embedded platform Flash data throughput rate> 20MByte/s. After verification on the board, it can correctly read and write Flash data. And Flash data read-write controller was successfully applied in 2000fps high-speed image non-uniformity correction processing unit.

Design of Multi-Input High Fidelity Preamplifier Based on STM32

Abstract: With the popularization of audio-visual entertainment equipment, the application of pre-stage power amplifiers is becoming more and more extensive. The use of a high-quality pre-stage amplifier will often bring people a better sound quality experience. The system uses STM32F103C8T6 as the main control chip, controls the multi-channel audio selector NJW1110 through the IIC bus, and can select the input audio signal corresponding to the output channel and the gain of the output audio signal. The output signal distortion is small, and HMI is used for human-computer interaction control The serial port screen greatly facilitates the user’s operation and use.

Cloud service platform system and method for FPGA prototype verification

Abstract: The invention provides a cloud service platform system and method for FPGA prototype verification, and the system comprises a Web server unit, a VM virtual machine unit and a Neuro server unit which are in communication connection with one another, and the Web server unit is configured to provide a serial port for the remote operation of a user; the VM virtual machine unit is configured to providean os carrier for a user to operate FPGA equipment; the Neuro server unit is configured to manage FPGA resources and service communication credentials between each piece of FPGA equipment and the VMvirtual machine unit. A unified hardware platform and middleware are provided at the cloud, and the development and deployment cost of the accelerator can be greatly reduced.

The Design of Single-chip Microcomputer for the Project of "Increase 485 Bus Communication Speed”

Abstract: The operation and maintenance of traditional substations is not timely due to the huge cost of manpower and material resources. In the context of "ubiquitous power Internet of Things", the operation and maintenance of substations uses a large number of sensor equipment. However, the traditional rs485 bus is difficult to transmit large-capacity data such as waveform curves and images in real time, and the optical fiber transmission form of industrial Ethernet will bring higher costs, which will hinder real-time monitoring. This project intends to achieve impedance matching by adjusting the resistance of the pull-up and pull-down resistors and terminal resistors, thereby increasing the communication rate of the rs485 bus. To this end, we specially designed a simple STM32 single-chip microcomputer to match the realization of the project. The hardware part of this design adopts the STM32F103RCT6 single-chip microcomputer as the main control chip, using MAX3485 as the serial port chip, and at the same time choosing the resistance and capacitance of 0805 package, using AMS1117 Packaged voltage regulator chip.

Design of Data Acquisition System for Vehicle Driving Simulator

Abstract: Data acquisition systems have a direct impact on interactivity and authenticity to the car driving simulator. According to the requirements of the vehicle driving simulator to complete the multi-channel data acquisition and processing with high speed and high precision, a set of real-time data acquisition system was designed. The system uses STM32F103ZET6 chip to process data acquisition, and communicates with the host computer through serial port. The experimental results show that the designed data acquisition system has good real-time performance, high accuracy and meets the expected functional requirements.

Image processing device

Abstract: FIELD: computer equipment.SUBSTANCE: image processing device comprises: programmable logic integrated circuit, operational memory, first and second voltage converter, a first and a second microcontroller, serial read-only memory, an Ethernet packet data interface, asynchronous RS-232 serial data interfaces, synchronous interfaces of serial data transmission CAN and asynchronous differential serial interfaces RS-485, serial interface for connection of USB peripheral devices, input interfaces for high-definition multimedia HDMI with buffer-correctors, inputs of which are inputs of the image processing device for connection of digital video cameras with an interface for high-definition multimedia HDMI, output interface for high-definition multimedia HDMI with a buffer-corrector, which output is the output of the image processing device, serial interface for connection of peripheral USB devices for programming a programmable logic integrated circuit, serial interface for connection of peripheral devices USB-host for connection of external USB devices, serial interface for connection of USB peripheral devices for connection of image processing device to external USB devices, microSD flash memory card, ADC analog-to-digital converter interfaces, interfaces of digital-to-analogue converters of DAC.EFFECT: shorter time for data processing and broader functional capabilities of the device.1 cl, 1 dwg

Large-size chip based on on-chip serial data communication and communication method thereof

Abstract: The invention discloses a large-size chip based on on-chip serial data communication and a communication method, S channel groups are arranged on the large-size chip, and a data conversion channel, aserializer, a serial data encoder, a serial data receiving transponder and a serial data interface circuit which are connected in sequence are arranged in each channel group; the large-size chip is also provided with a data clock feedback module which is connected with the serial data receiving transponders in any more than two channel groups in a logic control mode. On-chip communication is achieved on the large-size chip, a plurality of parallel data sets on the large-size chip can be connected in series through an annular serial interface containing tokens, and local data serialization is completed at each channel grouping position. The high-speed and stable output of the serial data can be completed without solving the clock synchronization problem among the data groups.

Input/output unit for data capture in a field bus system

Abstract: The invention relates to an input/output unit, a method and a microcontroller for data capture in a field bus system, the input/output unit comprising a standard microcontroller (11) having an integrated synchronous, serial interface (12) and a control unit (16) for direct memory access. A signal source (17) that generates digital data can be connected at a data input (MISO) of the at least one synchronous, serial interface (12). The first interface (12) reads the data presented at the data input (MISO) at a first clock rate, wherein, for direct memory access, the control unit (16) passes the data words read to a buffer memory (18) and fetches said data words from the buffer memory (18) from time to time and passes said data words to a second synchronous, serial interface (14) or to another bus interface (19). The second interface (14) or the other bus interface (19) is connected to a fieldbus interface (15) and outputs the data words at a higher clock rate than the first clock rate during data capture by the first interface (12).

Design of a Low-Cost Li-Fi System Using Table Lamp

Abstract: This paper presents a designing of a Li-Fi working model to send information in a unidirectional path via visible light to a receiving device across free space. The communication link will be set up between a mobile device and a PC using a modified table lamp to transmit data serially via USB COM port.

UART software implementation method based on low-voltage Internet of Things sensing terminal

Abstract: The invention discloses a UART software implementation method based on a low-voltage IOT sensing terminal, and provides a multi-sampling grouping judgment method, which is used for carrying out sampling analysis on irregular waveform groups by distributing different weight coefficients to each group of sampling data, and therefore the collection accuracy of irregular serial port waveforms is greatly improved. A software-defined UART communication interface only needs one timer and two I/O pins, data receiving and sending can be completed under the control of the same timer, and a full-duplex asynchronous serial port communication mode is achieved. The method solves the problems of long transition time and short maintenance time of serial port waveform change of interactive equipment and high bit error rate of data received by adopting a hardware UART serial port in practical application, and has very strong engineering practicability.

Design of Virtual Amplitude Modulation System Based on LabVIEW

Abstract: The traditional Oscilloscope has the problems of complex operation, long renewal period and inconvenient carrying. A virtual amplitude modulation system based on LabVIEW is designed. The system uses STC89C58 as MCU. The system combines RS232 serial port module, LCD display module, ADC module to form the lower computer of the system. LabVIEW software is used to write host computer of the system. Real-time reception, processing, display and adjustment of waveform signals can be realized. The test shows that the system runs well and can realize the preset function well. It has the characteristics of complete function, simple operation and strong expansibility.

Control device for multi-cabinet-chamber key cabinet

Abstract: The invention discloses a control device for a multi-cabinet-chamber key cabinet. The device comprises a central controller, a direct current power supply circuit connected with a VCC pin of the central controller, and a plurality of electromagnetic lock drive circuits which are connected with a serial port P2 of the central controller and are connected with electromagnetic locks in a one-to-one correspondence manner, wherein an SCL pin of an IC card seat is connected with a serial port P1.4 of the central controller U1, an SDA pin of the IC card seat is connected with a serial port P1.5 of the central controller U1, a diode D2, a triode Q1, a resistor R2, a resistor R3, a triode Q2, a resistor R4, a resistor R5 and a resistor R6 are further included, and the IC card seat connected with the central controller is arranged and can read the temporary or permanent permission of a permission card for opening a cabinet chamber and open a transformer substation key cabinet in an area where aequipment chamber and a room are centralized, so that a key can be borrowed nearby, and borrowing and returning of the key are more convenient. The device has the advantages of a simple structure, simplicity and convenience in operation and the like, and has high practical value and popularization value in the technical field of key management.

Design of Digital Media Virtual Display Platform Based on Virtual Reality Technology

Abstract: In order to improve the object-oriented and visual presentation ability of the digital media virtual display platform, the virtual reality technology is adopted to design the digital media virtual display platform. In the virtual reality environment, a design method of digital media virtual display platform based on multi-thread fusion scheduling and image fusion processing is proposed. The general structure model of digital media virtual display platform is constructed, the image information transmission channel model of digital media virtual display system platform is constructed by adopting serial VIX bus control technology, the basic entity object of digital media virtual display platform is constructed, and the multi-thread scheduling method is adopted for image fusion information scheduling and digital media control processing of digital media virtual display platform. The visual simulation and image processing model of digital media virtual display are constructed by using the serial channel control model, and the communication design between the system multi-channel serial port and the host computer is carried out. The software development of digital media virtual display platform is realized on MATLAB and VC++ platform. Experimental results show that the visual simulation effect of the digital media virtual display platform is good, which improves the reliability and stability of the digital media virtual display system platform and reduces the error of digital media information transmission.

Design of Temperature Data Acquisition and Information Processing System based on Mathematical Method

Abstract: Computer combined with mathematical methods to monitor industrial parameters has achieved good results. Temperature is one of the important parameters in industrial, military, agricultural, medical and other fields. In some particular environments, direct wiring measurements are clearly not sufficient, so wireless transmission of temperature sensing systems is particularly important. The system is divided into two parts: sending and receiving. The wireless data communication transceiver module is used to realize wireless data transmission. The sending part is based on the single-chip microcomputer. The temperature sensor is used for real-time temperature collection and wireless transmission. The collected results are verified by mathematical processing algorithm. The receiving module displays the temperature of the collection area on the LCD, and sends it to the PC through the temperature alarm device through the serial port, so as to realize the controllable temperature adjustment within a certain threshold. Compared with the traditional temperature detection system, the combination of computer and mathematical algorithm and the design of wireless transmission equipment make the system have the advantages of good real-time, high reliability, low engineering cost and low power consumption.

Discrete signal input/output control point

Abstract: The invention relates to control systems. A discrete signal input/output control point consists of a housing containing power supply units, RS-485 serial interface converters, and Ethernet switches. Interconnected programmable RS-485 serial interface converters are additionally provided. A main Ethernet switch and a redundant Ethernet switch are connected via a main Ethernet channel and a redundant Ethernet channel to a main processing unit and a redundant processing unit. The processing units convert received data using a set algorithm, and transmit said data via the main and redundant Ethernet switches to upper-level devices along Ethernet channels or RS-485 channels. The result is an increase in control efficiency.

Design and Analysis of Adolescent Physical Health Monitoring System under the Background of Internet of Things and 5G.

Abstract: In recent years, with the rapid development of network communication, 5G technology has brought about higher network speed and more communication requirements. Internet of Things technology has been widely used in many fields. Therefore, this paper realizes the physical health monitoring system under the Internet of Things and 5G communication technology to detect the physical health of teenagers in real time. Based on the in-depth analysis of the theoretical research and application status of the healthy Internet of Things at home and abroad, this paper first studies the theories and methods of teenagers' physical health information collection, collects human body temperature and movement steps, respectively, through wearable devices based on RFID anticollision algorithm, and further estimates human health and movement. The prototype system of the adolescent physical health monitoring system is realized. The system is divided into the terminal node and client information management system: (1) The terminal node is divided into information collection node and information collection node. The hardware circuit of the collection node mainly includes a microcontroller module, a sensor module, and a power circuit, and the collection node mainly includes a microcontroller module, a serial port module, and a power circuit. (2) The client information management system is divided into PC end and the mobile end. The PC end uses asp.net and SQL Server technology to design the database and user interface, and the mobile end uses WeChat public platform for development and design.

Captive portal order payment output system using virtual serial port

Abstract: Disclosed are a virtual POS module including virtual serial ports, and a captive portal order payment printing system including same, the virtual POS module being characterized by including: a serial port generation unit which generates at least two virtual serial ports; a plurality of connection COM ports which include a hardware connection COM port connected to a physical serial port connected to an external printer, and a software connection COM port connected to the virtual serial ports; a device settings unit which controls the settings of each of the plurality of connection COM ports; a data acquisition/processing unit which acquires and processes data from the software connection COM port; a data transmission unit which controls the output of a printer by transmitting data received from the data acquisition/processing unit to the physical connection COM port connected to a serial port of the external printer; and a control unit which controls the operation of each element of the virtual POS module, wherein one of the virtual serial ports is used by the virtual POS module, and the rest of the virtual serial ports are used by a prescribed external POS application.

Realization of Remote Monitoring System for Antenna Locking System Based on C

Abstract: Remote real-time monitoring system of antenna locking mechanism is studied by using C# programming in this paper. Remote data of the locking pin is read and displayed from the serial port. The current of the working motor is used to judge the working state of the locking mechanism in real time. Through the application of this system, real-time monitoring of the working state of the antenna locking system is realized. This system helps to improve the operation and maintenance efficiency of the antenna system.

Extensible microcontroller total dose effect online experiment test system

Abstract: The invention relates to an extensible microcontroller total dose effect online experiment test system. The online test system comprises a test daughter board, a signal control arbitration mother board, an extensible quick connection socket, a serial port bus, a TTL-to-485 communication module and an upper computer. The test daughter board is connected with the signal arbitration mother board through the extensible quick connection socket, and can carry out the total dose effect test of a plurality of tested microcontrollers at the same time. The signal control arbitration mother board is connected with standby I/O ports of the tested microcontroller, the closed-loop communication between the tested microcontroller and the serial port buses is established in turn in an arbitration communication mode, and the serial port sending end and the serial port receiving end of each test daughter board are connected to the two serial port buses respectively. And the serial port buses are connected with the TTL-to-485 communication module. The online experimental test system provided by the invention can optimize wiring and compatibility problems in a large sample size test, and meets rapid test requirements of a large number of samples in the comparison and screening of total dose effects of various types of microcontrollers.

5G network-oriented Internet-of-things terminal security convergence access method and system

Abstract: The invention relates to a 5G network-oriented Internet-of-things terminal security convergence access method, which adopts a multi-terminal interaction authentication method under a brand-new layoutarchitecture, and aims at Internet-of-things terminal equipment with weak computing resources through a hierarchical security authentication mode. Security access protection between the Internet-of-things terminal equipment and a security convergence system is realized by adopting a lightweight access authentication technology, and security access protection between the security convergence systemand a target Internet of Things platform is realized by adopting an access authentication technology based on a PKI system. The high efficiency and the safety of the Internet-of-things terminal in accessing and converging practical application can be effectively improved; and a system applying the method is further designed, a serial port, a network port and various local area network wireless communication modules are integrated, northbound transmission of data is finally completed by using a 5G network through analysis and classified storage of data formats and types, unified access and convergence of various Internet-of-things devices of different device manufacturers can be realized, and the data transmission efficiency is improved. And the working efficiency of actual Internet-of-things terminal convergence is improved.

Embedded USB image acquisition and remote transmission system and method

Abstract: The invention provides an embedded USB image acquisition and remote transmission system and method. The embedded USB image acquisition and remote transmission system comprises a power supply circuit,a microcontroller circuit, a USB interface circuit and a network interface circuit. The power supply circuit provides required working voltage for the microcontroller circuit, the USB interface circuit and the network interface circuit. The microcontroller circuit is connected with the USB interface chip and the network interface chip through SPI synchronous serial ports. The USB interface chip works in a HOST mode, is connected with the USB binocular camera and is used for acquiring image data. The network interface chip is connected with an external router, a 4G wireless network router or anAP and the like, and is used for transmitting a USB image to a far-end PC, a JetSON and other controllers.

Loopback test device and method for diagnosing vehicle central gateway communication link fault

Abstract: The invention relates to the technical field of vehicle fault analysis, in particular to a loopback test device and a method for diagnosing a vehicle central gateway communication link fault. An uppercomputer is in communication connection with a vehicle central gateway through a serial port, all Ethernet ports of the vehicle central gateway controller form data communication links of multiple vehicle-mounted Ethernet, all CAN bus communication ports are carried on one CAN bus, and all LIN buses are carried on one LIN bus; the storage space in the vehicle central gateway controller is provided with a test program for realizing the function of detecting the communication port; the loopback testing device is not provided with a processor, corresponding testing programs do not need to be written, and pure hardware implementation is achieved; diagnosis of a communication link of the vehicle central gateway controller is achieved through the program processing capacity of the vehicle central gateway controller. Under the condition that gateway software function development is not completed, whether a hardware communication link is good or not is rapidly diagnosed and positioned, and problem responsibility is defined.

Exercise distributed reaction time training and testing reaction terminal

Abstract: The invention discloses an exercise distributed reaction time training and testing reaction terminal which comprises an upper computer and a lower computer. The upper computer and the lower computer are in wireless connection through WIFI. The lower computer comprises a main control panel, a wireless WIFI module, an infrared sensor module, an LED lamp, a buzzer and a power module. The main controlpanel is provided with a microprocessor. The wireless WIFI module is connected with a serial port of a 51 single-chip microcomputer. The original intention of the design of the equipment is badmintondesign and improvement, but the equipment has universality, and the equipment can quickly adapt to other public exercises and training by modifying exercise reaction time training and testing strategies and logic.

Wireless earphone serial port control method and apparatus, wireless earphone, and storage medium

Abstract: Disclosed in the present application are a wireless earphone serial port control method and apparatus, a wireless earphone, and a computer readable storage medium. The method comprises: when a first preset condition is met, controlling a serial port function of the wireless earphone to be disabled, the first preset condition comprising that the wireless earphone is located outside a charging box, or the wireless earphone is located in the charging box and the charging box is in a close state; and when a second preset condition is met, controlling the serial port function of the wireless earphone to be enabled, the second preset condition comprising that the wireless earphone is located in the charging box and the charging box is in an open state. Therefore, according to the wireless earphone serial port control method provided by the present application, power consumption caused by the serial port function is reduced, so that the standby time of the wireless earphone is prolonged.

Host power delivery from dual port peripheral device

Abstract: Apparatus and method for distributing power to a host computer (112). A first serial cable (145) establishes a first data link (146) and a first power transfer link (148) between a first serial port of a peripheral device (110) and the host computer. A second serial cable establishes a second data link (146) and a second power transfer link (148) between a second port of the peripheral device and an external power supply unit (PSU). A peripheral controller circuit (114) detects available power from the external PSU at a level suitable for use by the host device, notifies the host computer of the available power from the external PSU, and interconnects the first and second serial ports to flow the available power to the host device via the first and second power transfer links. The peripheral device may take the form of a solid-state drive (SSD) (110) with a non-volatile memory (118), such as flash memory.