Hello, i want to make a project with an 8051. I want to control the 8051 through the pc with visual c++ and the controller will control some sensors. the diagram is: pc->8051->sensors. The idea is to communicate the pc with the 8051 via tcp/ip protocol. Is it possible?What am i need? If it is possible i want to give me informations(software,hardware,circuits or links) about this project. thanks
Why do you specifically want to do it with an 8051?
It is certainly possible - but not really a beginner's project.
You would probably find it easier to start with a serial interface.
On the other hand, if your main interest is TCP/IP, you would probably find it easier not to use an 8051. I would suggest one of the Luminary Micro Stallaris chips with built-in ethernet...
See: http://www.keil.com/tcpip/