To solve the problem how to transfer data from MCU to remote host computer, based on 8-bit MCU AT89C51 and RTL8019AS, TCP/IP protocol is condensed into the form of facing hardware and embbed into MCU, then the data traffic by E-mail between MCU and Internet is realized and the degree of information sharing between them is increased.
The hardware is the adapter of CAN and RS485 asynchronous serial communication interface on PCI bus. In Windows2000 operating system,Driver Works is employed to develop the WDM driver in order to transfer data.
This paper presents a kind of data frame structure applying 8-bit microcomputer 87C591 of PHILIPS. It can transfer data more than 8 bytes based on CAN specification 2.0A and makes up for the shortage of CAN specification 2.0A that can only transfer data less than 8 bytes.
At first,has designed a data format in transfering,which can transfer data more than 8 bytes based on CAN specification 2.0A and makes up for the shortage of CAN protocol of application layer based on the data structure,and has established the reliable receiving and dispatching mechanism,the management mechanism and the error processing mechanism and so on,which maintains the protocol work smoothly and attains the convenient and prompt transmission through CAN bus.
Telnet is one of the most classical and the most powerful remote network configuration and control tool. Telnet protocol provides one of the important ways to transfer data and control information on the Internet that set up on a lot of different kinds of platforms.