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
针对传统嵌入式以太网系统存在的数据传输速率低、硬件不能升级、实时性和通用性不足等问题,提出了基于内嵌有Nios II CPU的Altera Cyclone系列FPGA的以太网控制器设计方案.该方案针对以太网协议利用Quartus II和Nios II IDE为开发工具...针对传统嵌入式以太网系统存在的数据传输速率低、硬件不能升级、实时性和通用性不足等问题,提出了基于内嵌有Nios II CPU的Altera Cyclone系列FPGA的以太网控制器设计方案.该方案针对以太网协议利用Quartus II和Nios II IDE为开发工具,对硬件进行重新配置,以提高系统集成度;采用SOPC技术构建了嵌入式网络硬件平台;基于μC/OS-II实现了Niche Stack TCP/IP协议栈的移植及顶层应用程序的编写.系统测试结果表明,数据能够以400 Mb/s的速率正确收发,满足了以太网通信速率的要求,并可根据实际情况灵活配置.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.
文摘针对传统嵌入式以太网系统存在的数据传输速率低、硬件不能升级、实时性和通用性不足等问题,提出了基于内嵌有Nios II CPU的Altera Cyclone系列FPGA的以太网控制器设计方案.该方案针对以太网协议利用Quartus II和Nios II IDE为开发工具,对硬件进行重新配置,以提高系统集成度;采用SOPC技术构建了嵌入式网络硬件平台;基于μC/OS-II实现了Niche Stack TCP/IP协议栈的移植及顶层应用程序的编写.系统测试结果表明,数据能够以400 Mb/s的速率正确收发,满足了以太网通信速率的要求,并可根据实际情况灵活配置.
