This subject is become key control systems by 8051 forms and an organization. The whole system is shown and is controlled partly, carried out some three parts to make up by top management part, keyboard, Through checking that finishes storing and wrapping up and fetch the course of the bag automatically of the password.
The first part : CPU core control and partly, form of 8051 one-chip computers, whole core of system.. Through these keyboards, users can finish all operation.
Second part : The keyboard show that controls some. In charge of with HD7279A to 8 number and 14 button go on and manage, 8 number in charge of and use for and show two cupboard symbol and 8 password, 14 buttons are 10 numerical keys respectively and 4 function keys. Through these keyboards, users can finish all operation.
The third part : Executive body's part. In it through the not running side by side because there aren't mouth, and control through 8255 A there aren't the states of light of 20 pieces( on to kill) of 8051 and simulate Storing and wrapping up the course which fetches the bag..
Software part adopt we one that oneself establish correlate with number of the cupboard algorithm that unite come and produce one password at random of 8 of group mainly, And production, check course correspond to and deposit the bag, fetch the course of the bag of password.
This system has the following characteristic : 1、Economical and practical, operate simple and easy to installly. 2、Can produce one group 8 password at random, password use one effective; There is fault-tolerant function three times and locking the function , therefore the system is safe and reliable. 3、Utilize software produce password instead of hardware, make hardware more succinct, reliable, stability at random.
Keyword: Store a bag of cupboards, algorithm, the password, fault-tolerant, unblock at random automatically