Today, where high technology is rapidly evolving, various forms of password locks, electronic locks and laser locks have been invented. These locks are based on traditional keys and control the opening and closing of locks in a variety of ways, such as magnetic fields, acoustic waves and beams, thus effectively enhancing the safety of locks, protecting the lives and property of people and preventing the exposure of thieves。
It is also called a single microcomputer or a single microcomputer, which effectively brings together computer functional components such as central processing, read-only storage, random access storage and input-output ports. The size of the computer is so large that it is not easily carried that it can be transported on single-piece machines, the electronic password locks are simple circuits attached to the outside of the single-piece machines, and the artificial writing program is used to complete the core, not only to reduce the volume of the locks, but also to reduce costs, maintain precision and be able to effectively upgrade and improve the electronic password locks。
2 system design for single machine password locks
2. 1 general design structure for single-piece password lock system figure
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2. 2 design of single-piece locker
The single-piece locking facility was designed to place the single-piece machine in the lock-opening facility, enabling circuit drivers and electromagnetic locks to inhale and thus unlock. The electronic locks designed in this paper are used through p3. 0 to access the triodes and drive relays to open the electromagnetic valve wires and then open and close doors。
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Based on the graphics above, it is known that when the password entered by the user within the specified time and number of inputs is correct, the single password locks output the opening signal, transmitting the signal to the circuit that drives the lock, and then driving the electromagnetic lock to open the door。
2. 3 design of single-piece password lock system hardware
The password locks for the electronic locks designed for this paper use simple, easy-to-operate, and not well-known modulation code as a password input for circuits, and the hardware device for this keyboard can be entered and changed with a single button. The name of the morse password came from an inventor named morse in the united states in the middle of the last century, who invented the code used in telegraph transmission, so that the morse password was sometimes referred to as the morse password, which was determined by the length of time a key enters and stays at the time of input: the short telecommunications number “..” reads “di”, while the key remains intact at the time of reading “da”, specifically, the interval between “drops” is 1t, the interval between “t”, the interval between “t”, is 1t; the interval between letters is 3t, the interval between word and word is 5t, and the chart below specifies the characters and the morse password。
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First, the tools needed to weld the circuits
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The main chip of the system circuit, which is locked with this electronic password, is at89c51, which includes a clock pulse, electrical resistance, electrolytic capacitor, and a secondary circuit consisting of a key, as well as a password monitor consisting of eight digital tubes, and a beeper and five led lamps, a npn triode and a relay, together with the system circuits that form this electronic password lock。
Software design for single electronic password locks
3. 1 a holistic approach to the design of system software for single electronic locks
The application system of a single electronic lock must first have more complete hardware as a guarantee if it is to complete the functions perfectly, and it is supported by software that is reasonably designed to adapt. This is because, today, when information technology is rapidly evolving, software programming has gradually replaced many of the work done in the past with hardware, which would have been much simpler if software had been selected for some work that required complex hardware circuits. In response to the above, the extensive software and hardware resources were fully utilized and software programming was carried out using a programme design methodology for the compilation of language and structure of the c51 series, which is appropriate for the c51 series。
3. 2 design process for single-piece electronic password lock system software figure
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4 debug a single electronic password lock
The debugging program for the single-single password lock of this paper needs to be applied to keilc51 and its accompanying download burner software, which is a software development system produced by the united states company keil that is compatible with the language of the single-piece c, and which has the advantages that cannot be compared with the compilation language, as demonstrated by functional structure and readability and maintenance, and is easy to learn and use. The keilc51 software has a very rich library function and a relatively powerful integrated development debugging tool, and the system as a whole uses an all-windows interface and, unlike other software, the keilc51 software, by looking at compiled compilation codes, can capture the more efficient and easily understandable keilc51 target code, which is its more obvious advantage。
The keilc51 toolkit can be independently edited. Translation. A series of development processes such as connection, debugging and simulation, of which uvision and ishell are the integrated development environments of keilc51 against windows and dos, respectively. This allows developers to edit documents in the c language or in the source through the keilc51 integrated development environment themselves or using other editors, and then compile the target documents already produced by the compilers of keilc51 and keila51, respectively. This target file not only can be recreated by lib51 to create the file of the generator library, but can also be combined with the library file to position it specifically by connecting to l51 and eventually generate the absolute target - abs developer transforms the abs file from an oh51 file to a hex file, thus allowing the debugger dscope51 or tscope51 to perform a series of source-level debuggings, of course, with a simulator, which can also be used for direct debugging the target board and eventually write it to the program memory。
The specific debugging method is to first open the keilc51 master program, create a new project, then write the program into the new text box, then save it and then check for grammatical errors, and then compile it after repeated detection that there are no errors, when the resulting 51-formula machine is able to execute the hex file, and finally write hex into a single film with a burner matching the keilc 51 development board。
5 concluding remarks
Scientific and technological progress and economic development were the subjects of the current era, and the improvement of people's standard of living necessarily required greater rigour in the requirements of locking down the quality of this daily necessities and preventing theft. Traditional mechanical locks, because of their simple construction, are far from meeting the needs of the population, and their further use and promotion can be facilitated only by strengthening the detection and application of electronic locks based on single-piece electronics in practical applications. Electronic locks are a product of the information age and, as science and technology continue to evolve and develop, they must become more humane, convenient and safe in the future。
