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PROTOCOL

PROTOCOL为进行网络中的数据交换而建立的规则、标准或约定。用于不同系统中实体间的通信。两个实体要想通信,必须有“同一种语言”,而且,对于通信内容,怎样通信和何时通信,都必须遵守一定的规定,这些规定就是协议。亦可简单地定义为:控制两实体间数据交换的一套规则。在电子通讯连接中,各个不同的层次都有自己的协议。例如,在硬件设备层次和应用程序层次的数据交换都有自己的协议。在开放式系统互连(OSI)标准模式中,每个层都有一到两种协议,发生通讯的两个终端都必须能识别和遵守协议。协议通常以工业或国际标准的形式被描述。
  • 基于CC1110单片机公交报站系统的设计

    基于CC1110单片机公交报站系统主要由CC1110单片机最小系统和WT588D语音模块组成,提出了如何实现语音报站,通过无线通信SimpliciTI网络协议实现公交站台的自动播报和OLCD液晶显示公交运行的各类信息。结果表明,该公交报站系统报站准确率99%,价格比同类产品下降了300%以上,系统组成结构简单,提高了系统的抗干扰性和稳定性,也便于携带。 Abstract:  The bus stop announcement system based on CC1110 MCU is composed of CC1110 MCU minimum system and WT588D voice module. How to achieve the voice announcing is put forward.The bus-stop will announce automatically and display on the OLCD by means of wireless communication SimpliciTI network PROTOCOL. As a result, the bus station stop announcement systems reported 99% accuracy rate, price of similar products declined by 300% or more, system of simple structure, improve the anti-jamming and stability of the power system, it is also portable.

    标签: 1110 CC 单片机 公交报站

    上传时间: 2013-10-21

    上传用户:baby25825

  • 基于AVR单片机的USB接口设计

    以AVR单片机ATmega8和USB接口器件PDIUSBD12为核心,基于标准的USB1.1协议,设计一种通用USB接口模块,以满足嵌入式系统中对USB接口的需求。对模块的硬件电路或单片机固件程序的硬件接口层稍加修改即可用于其他各种微处理器。该模块可为各种嵌入式系统增加USB接口,实现与USB主机系统通信。 Abstract:  Based on AVR microcontroller ATmega8 and USB interface chip PDIUSBD12, a general USB interface module is designed according to USB1.1 PROTOCOL for various requirements of embedded systems. Only with few modifications in circuit or hardware abstract layer of firmware, the module can be used on many types of microprocessors. All kinds of embedded systems can realize high speed and stable communication with USB host systems, owing to the facility of this module.

    标签: AVR USB 单片机 接口设计

    上传时间: 2014-01-08

    上传用户:赵云兴

  • 基于MPC555与CS8900A的以太网扩展设计

       介绍了MPC555与CS8900A扩展以太网的硬件设计图。以NUCLUES PLUS操作系统为基础,介绍了网卡软件驱动程序的编制,给出了以太网协议包嵌入NUCLEUS PLUS操作系统的实现方法。 Abstract:  The Ethernet extension hardware design of MPC555 and CS8900A are introduced,and the software driven program based on NUCLEUS PLUS operation system and the technique that Ethernet PROTOCOL embedded in NUCLEUS PLUS real operation system are discussed.

    标签: 8900A 8900 MPC 555

    上传时间: 2013-10-23

    上传用户:xiehao13

  • STM32启动代码

    The bootloader is stored in the internal boot ROM memory (system memory) of STM32devices. It is programmed by ST during production. Its main task is to download theapplication program to the internal Flash memory through one of the available serialperipherals (USART, CAN, USB, etc.). A communication PROTOCOL is defined for each serialinterface, with a compatible command set and sequences

    标签: STM 32 启动代码

    上传时间: 2014-09-06

    上传用户:417313137

  • FET430PIF自制资料

    The MSP-FET430PIF is a Parallel Port interface (does not include target board) that is used to program and debug MSP430 FET tools and test boards through the JTAG interface. This interface is included in our FET tools, but sold without the development board. This interface uses a Parallel PC Port to communicate to the Debugger Software (IAR Kickstart software included) running on the PC. The interface uses the standard 14 pin header to communicate to the MSP430 device using the standard JTAG PROTOCOL. The flash memory can be erased and programmed in seconds with only a few keystrokes, and since the MSP430 flash is extremely low power, no external power supply is required. The tool has an integrated software environment and connects directly to the PC which greatly simplifies the set-up and use of the tool. The flash development tool supports development with all MSP430 flash parts. Features MSP430 debugging interface to connect a MSP430-Flash-device to a Parallel port on a PC Supports JTAG debug PROTOCOL (NO support for Spy-Bi-Wire (2-wire JTAG) debug PROTOCOL, Spy-Bi-Wire (2-wire JTAG) is supported by MSP-FET430UIF) Parallel Port cable and a 14-conductor target cable Full documentation on CD ROM Integrated IAR Kickstart user interface which includes: Assembler Linker Limulator Source-level debugger Limited C-compiler Technical specifications: Backwardly compatable with existing FET tool boards.

    标签: FET 430 PIF

    上传时间: 2013-10-26

    上传用户:fengweihao158@163.com

  • MSP430 USB JTAG自制资料

    The MSP-FET430U14 is a powerful flash emulation tool to quickly begin application development on the MSP430 MCU. It includes USB debugging interface used to program and debug the MSP430 in-system through the JTAG interface or the pin saving Spy Bi-Wire (2-wire JTAG) PROTOCOL. The flash memory can be erased and programmed in seconds with only a few keystrokes, and since the MSP430 flash is ultra-low power, no external power supply is required. The debugging tool interfaces the MSP430 to the included integrated software environment and includes code to start your design immediately.  The MSP-FET430UIF development tools supports development with all MSP430 flash devices

    标签: JTAG MSP 430 USB

    上传时间: 2013-10-28

    上传用户:13691535575

  • CAT25128-128Kb的SPI串行CMOS EEPRO

    The CAT25128 is a 128−Kb Serial CMOS EEPROM device internally organized as 16Kx8 bits. This features a 64−byte page write buffer and supports the Serial Peripheral Interface (SPI) PROTOCOL. The device is enabled through a Chip Select (CS) input. In addition, the required bus signals are clock input (SCK), data input (SI) and data output (SO) lines. The HOLD input may be used to pause any serial communication with the CAT25128 device. The device featuressoftware and hardware write protection, including partial as well as full array protection.

    标签: 25128 EEPRO CMOS CAT

    上传时间: 2013-11-15

    上传用户:fklinran

  • SJA1000 Stand-alone CAN contro

    The Controller Area Network (CAN) is a serial, asynchronous, multi-master communication PROTOCOL forconnecting electronic control modules, sensors and actuators in automotive and industrial applications.With the SJA1000, Philips Semiconductors provides a stand-alone CAN controller which is more than a simpleeplacement of the PCA82C200.Attractive features are implemented for a wide range of applications, supporting system optimization, diagnosisand maintenance.

    标签: Stand-alone contro 1000 SJA

    上传时间: 2013-11-18

    上传用户:yxgi5

  • PCA82C250 PCA82C251 CAN Transc

    The PCA82C250 and PCA82C251 are advanced transceiver products for use in automotive and general industrialapplications with transfer rates up to 1 Mbit/s. They support the differential bus signal representation beingdescribed in the international standard for in-vehicle CAN high-speed applications (ISO 11898). Controller AreaNetwork (CAN) is a serial bus PROTOCOL being primarily intended for transmission of control related data between anumber of bus nodes.

    标签: PCA 82C Transc 82

    上传时间: 2013-11-24

    上传用户:Alick

  • TJA1042 High-speed CAN transce

    The TJA1042 is a high-speed CAN transceiver that provides an interface between aController Area Network (CAN) PROTOCOL controller and the physical two-wire CAN bus.The transceiver is designed for high-speed (up to 1 Mbit/s) CAN applications in theautomotive industry, providing the differential transmit and receive capability to (amicrocontroller with) a CAN PROTOCOL controller.

    标签: High-speed transce 1042 TJA

    上传时间: 2014-12-28

    上传用户:气温达上千万的