The Development Of Networked Instrument Interface Based On Tcp / Ip Protocol And Its Applications

To realize Internet in embedded system is the hot spot of present time . It's a mature technology to realize Internet instrument in PC . But know ,most embedded system is running independenced, Even the networking , the most part is only by way of the mutual connection of RS232/485 bus and PC . To make the embedded system networkization , we study the Ethernet principle and the network control chip ( RTL8019AS ) . According to the characteristic of 8051, we expand the Transmission control protocol and network protocol ( TCP/IP protocol ) . Use the assembly language to realize the change between TCP/IP protocol and serial port protocol . We connect this transducer with a check on work attendance system . Directly being linked together with the communication network thread hawser nearby , the net is directly sent the on-site testing data to the internet . At last, we establish client program to control the remote check on work attendance system .