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Development of a fiscal cash registers

Author: CaoHongYu
Tutor: LiZhengJun
School: Shandong University
Course: Detection Technology and Automation
Keywords: Fiscal Cash Register Control IC card Fiscal and invoice memory Information Security Hierarchical modular design
CLC: TH692
Type: Master's thesis
Year: 2005
Downloads: 75
Quote: 0
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Abstract


Fiscal cash registers electronic cash registers, tax control functions and ensure correct operating data generated reliable storage and secure delivery. The main purpose is to use fiscal cash registers to reduce and prevent the loss of tax revenue. Function of fiscal cash registers, security, reliability and scalability on the market status quo, this subject, the development of this subsection, fiscal cash registers. Design of this subsection fiscal cash registers in accordance with the requirements of the national standards of fiscal cash registers. Fiscal IC card as the core security mechanisms - through Fiscal card correctly generate tax control data; Fiscal data were reliable storage the user card Fiscal data security pass to the tax authorities tax control card and tax control memory; Fiscal Cash Register Management System. The subject in the overall design of the hierarchical design and modular design method. Fiscal cash registers of this paragraph from the bottom and is divided into three layers: hardware circuit layer underlying driver layer and the upper layer application layer. Layers divided according function module, each module to complete certain functions. This layered design layers and between the various functional modules and modular design method is relatively independent, and is conducive to the maintenance and improvement of the system, and it has a good scalability. Hardware circuit design to use 16-bit MCU-R8830 as only central processor in the system, the program memory selection has data write-protect function SST28SF040 the Fiscal and invoice memory selection has a bad block mapping function with non-memory K9F2808. Circuit logic circuit design applications CPLD hardware circuit design not only improves flexibility, and improved hardware circuit confidentiality. By optimizing the print head driving circuit, to improve the printing reliability. Embedded program is divided into two parts of the underlying driver and the upper layer application. First boot underlying system boot, and then enter the the upper main program main () running, waiting for keyboard input. All functions by the keyboard (or switch) drive, LCD display the menu, and enter the corresponding upper functional modules, functional processing. Functional processes in the upper application will call the corresponding modules of the underlying driver to drive the hardware function together to complete processing. Function dealt to return control to the main (). Fiscal cash registers as a legal seriousness of the cash register with the tax function, its information security is very important. Author of \

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