为降嵌入式以太网成本、提高效益,采用DSP(Digital Signal Processor)芯片和网卡接口控制芯片ENC28J60设计以太网控制器。研究了采用标准SPI(Serial Peripheral Interface)串行接口的新型独立以太网控制器ENC28J60的特点,以及与外部接...为降嵌入式以太网成本、提高效益,采用DSP(Digital Signal Processor)芯片和网卡接口控制芯片ENC28J60设计以太网控制器。研究了采用标准SPI(Serial Peripheral Interface)串行接口的新型独立以太网控制器ENC28J60的特点,以及与外部接口的硬件电路设计,分析了嵌入式TCP/IP协议的选取原则,DSP芯片对网卡接口控制芯片的控制过程和TCP/IP协议处理数据包的流程。该系统可以将数据按网络协议处理,实现数据的以太网传输。展开更多
This paper introduces an interactive system of sight-singing and ear-training which combines the technology of single chip microprocessor (SCM) with learning music. It contains the functions of scanning keyboard, read...This paper introduces an interactive system of sight-singing and ear-training which combines the technology of single chip microprocessor (SCM) with learning music. It contains the functions of scanning keyboard, reading the key value, interruption service, reading file and displaying file. In order to strengthen the commonality and practicability of the system, SD card is used to store the materials and the ZNFAT32 file system is transplanted to organize the materials in the form of file directory. This interactive system can recognize and perform music automatically for the users and play significant role in education and entertainment.展开更多
文摘为降嵌入式以太网成本、提高效益,采用DSP(Digital Signal Processor)芯片和网卡接口控制芯片ENC28J60设计以太网控制器。研究了采用标准SPI(Serial Peripheral Interface)串行接口的新型独立以太网控制器ENC28J60的特点,以及与外部接口的硬件电路设计,分析了嵌入式TCP/IP协议的选取原则,DSP芯片对网卡接口控制芯片的控制过程和TCP/IP协议处理数据包的流程。该系统可以将数据按网络协议处理,实现数据的以太网传输。
文摘This paper introduces an interactive system of sight-singing and ear-training which combines the technology of single chip microprocessor (SCM) with learning music. It contains the functions of scanning keyboard, reading the key value, interruption service, reading file and displaying file. In order to strengthen the commonality and practicability of the system, SD card is used to store the materials and the ZNFAT32 file system is transplanted to organize the materials in the form of file directory. This interactive system can recognize and perform music automatically for the users and play significant role in education and entertainment.