Abstract
The system that I design is an automat basing on microcontroller 8751to control the sell goods system .
In the following paper introduce the system design and handware sellection software design and write . and emphases describe the automat system worke principle system design and sofeware programing technique The master mcu 8751 is INTEL Company. The system has some prominent excellences by concentrate control. It is very steady and credible,my system use 4*4keyboard to sellecting goods useing two programing parallel interface 8255 to resolve i/o tensional problem make goods dorp and coin display function
. I program the system by software named keilc51, The whole of programmer is writed by asembeling language.keilc51 software makes my programmer easier and check work more convenient.