As remote control for electric home appliances thro ug h the Internet becomes more common, many compannies today launched a new corpora te initiative to develop advanced embedded solutions for Internet connectivity t ...As remote control for electric home appliances thro ug h the Internet becomes more common, many compannies today launched a new corpora te initiative to develop advanced embedded solutions for Internet connectivity t hat can be applied to a boundless number of products such as information applian ces and non-PC devices. The most representative products are CMX-MicroNet which provides true TCP/IP ca pabilities for 8-bit and 16-bit microprocessors and eZ80Internet Engine which provides easy Internet connectivity for 8-bit devices. Pushed by the extraordinary success of these products, we have developped a kin d of embedded TCP/IP chip based on DW8051 Core.With some significant features su ch as establishing several connections at a same time, low-cost and high speed, we hope it will possess its own "embedded Internet" market. There are three most common application fields of the embedded TCP/IP chip. a) connection embedded microcontroller-based devices such as electric home appl iances to Internet b) allowing the remote control and monitoring of devices in the field via the In ternet c) allowing a remote device to send messages via email to, for example, a servic e centre. The working process of communication with embedded TCP/IP chip is described as f ollows.When it starts to work, it keeps on waiting the connection request from t he host and getting the requisite information such as destination IP address,des tination port through the host interface.Then it should connect to the ISP. A di al-up modem makes the connection and then the connection is negotiated. When bo th end systems begin to communicate, the chip keeps on transmitting datagram bet ween them and inspecting every phase of the connection to ensure the communicati on. The innovation of this design is the successful usage of separate CRC module and UART module, as can improve the speed and performance of this chip greatly. Suc h kind of efficiency improvement brought by the proposed design has been proved on Altera’s SOPC(System On a Programmable Chip). The whole system has been val idated through hardware emulation platform. The core has been mapped on APEX EP2 0K400E and works under the frequency of 25 MHZ.展开更多
A scheme of transmission control protocol/Internet protocol（TCP/IP） network system based on system-on-programmable chip（SOPC） is proposed for the embedded network communication. In this system, Nios processor, Eth...A scheme of transmission control protocol/Internet protocol（TCP/IP） network system based on system-on-programmable chip（SOPC） is proposed for the embedded network communication. In this system, Nios processor, Ethernet controller and other peripheral logic circuits are all integrated on a Stratix Ⅱ field programmable gate array （FPGA） chip by using SOPC builder design software. And the network communication is realized by transplanting MicroC/OS Ⅱ （uC/OS Ⅱ ） operation system and light weight Internet protocol（LwIP）. The design idea, key points and the structures of both software and hardware of the system are presented and ran with a telecommunication example. The experiment shows that the embedded TCP/IP network system has high reliability and real-time performance.展开更多
With the rapid development of the embedded technology, research and implement of the Internet of things will be a new technology revolution, yet the implement of the Internet of things is on the base of the communicat...With the rapid development of the embedded technology, research and implement of the Internet of things will be a new technology revolution, yet the implement of the Internet of things is on the base of the communication between the things. For this reason, realizing the function of communication between singlechip is particularly important. Based on the characteristics of the embedded microcontroller, we analyzed the traditional PC TCP/IP protocol, and appropriately tailored TCP/IP protocol cluster on the basis of the characteristics of embedded singlechip. At last, we realized the reduced TCP/IP protocol cluster suitable for embedded singlechip, on AVR singlechip platform.展开更多
随着空间通信系统的发展,CCSDS建议逐渐成为了空间通信的标准,特别是IP over CCSDS Space Links红皮书提出以后,IP已经成为空间信息系统的标准上层应用。提出了一种天地通信系统CCSDS加速网关的设计实现方法,介绍了基于加速网关的天地...随着空间通信系统的发展,CCSDS建议逐渐成为了空间通信的标准,特别是IP over CCSDS Space Links红皮书提出以后,IP已经成为空间信息系统的标准上层应用。提出了一种天地通信系统CCSDS加速网关的设计实现方法,介绍了基于加速网关的天地通信网络结构,描述了其关键技术实现,最后对提出的设计实现方法在OPNET中进行了仿真验证。OPNET仿真结果表明,该技术大大提高了TCP应用在空间链路上的传输效率,而且在多连接共享带宽时保持了较好的公平性。展开更多
文摘As remote control for electric home appliances thro ug h the Internet becomes more common, many compannies today launched a new corpora te initiative to develop advanced embedded solutions for Internet connectivity t hat can be applied to a boundless number of products such as information applian ces and non-PC devices. The most representative products are CMX-MicroNet which provides true TCP/IP ca pabilities for 8-bit and 16-bit microprocessors and eZ80Internet Engine which provides easy Internet connectivity for 8-bit devices. Pushed by the extraordinary success of these products, we have developped a kin d of embedded TCP/IP chip based on DW8051 Core.With some significant features su ch as establishing several connections at a same time, low-cost and high speed, we hope it will possess its own "embedded Internet" market. There are three most common application fields of the embedded TCP/IP chip. a) connection embedded microcontroller-based devices such as electric home appl iances to Internet b) allowing the remote control and monitoring of devices in the field via the In ternet c) allowing a remote device to send messages via email to, for example, a servic e centre. The working process of communication with embedded TCP/IP chip is described as f ollows.When it starts to work, it keeps on waiting the connection request from t he host and getting the requisite information such as destination IP address,des tination port through the host interface.Then it should connect to the ISP. A di al-up modem makes the connection and then the connection is negotiated. When bo th end systems begin to communicate, the chip keeps on transmitting datagram bet ween them and inspecting every phase of the connection to ensure the communicati on. The innovation of this design is the successful usage of separate CRC module and UART module, as can improve the speed and performance of this chip greatly. Suc h kind of efficiency improvement brought by the proposed design has been proved on Altera’s SOPC(System On a Programmable Chip). The whole system has been val idated through hardware emulation platform. The core has been mapped on APEX EP2 0K400E and works under the frequency of 25 MHZ.
基金Applied Programof Basic Research of Tianjin(08JCYBJC14700)
文摘A scheme of transmission control protocol/Internet protocol（TCP/IP） network system based on system-on-programmable chip（SOPC） is proposed for the embedded network communication. In this system, Nios processor, Ethernet controller and other peripheral logic circuits are all integrated on a Stratix Ⅱ field programmable gate array （FPGA） chip by using SOPC builder design software. And the network communication is realized by transplanting MicroC/OS Ⅱ （uC/OS Ⅱ ） operation system and light weight Internet protocol（LwIP）. The design idea, key points and the structures of both software and hardware of the system are presented and ran with a telecommunication example. The experiment shows that the embedded TCP/IP network system has high reliability and real-time performance.
文摘With the rapid development of the embedded technology, research and implement of the Internet of things will be a new technology revolution, yet the implement of the Internet of things is on the base of the communication between the things. For this reason, realizing the function of communication between singlechip is particularly important. Based on the characteristics of the embedded microcontroller, we analyzed the traditional PC TCP/IP protocol, and appropriately tailored TCP/IP protocol cluster on the basis of the characteristics of embedded singlechip. At last, we realized the reduced TCP/IP protocol cluster suitable for embedded singlechip, on AVR singlechip platform.
文摘随着空间通信系统的发展,CCSDS建议逐渐成为了空间通信的标准,特别是IP over CCSDS Space Links红皮书提出以后,IP已经成为空间信息系统的标准上层应用。提出了一种天地通信系统CCSDS加速网关的设计实现方法,介绍了基于加速网关的天地通信网络结构,描述了其关键技术实现,最后对提出的设计实现方法在OPNET中进行了仿真验证。OPNET仿真结果表明,该技术大大提高了TCP应用在空间链路上的传输效率,而且在多连接共享带宽时保持了较好的公平性。
