Design And Implement Of The Fiscal Cash Register System Based On Embedded Linux

Fiscal cash register represents a novel industrial branch promoted by the National Gold Tax Project. As a cash register it is widely used in supermarkets, ordinary shops, pubs and other kinds of places for controlling control tax, recording tax data and printing receipt and other report forms of tax revenue. While the MCUs of fiscal cash register available on today's market are mainly 8 or 16-bit and don't possess operating system, which result in the simple function, poor memory property and inconvenient manipulation etc. The aim of this project is the design of a novel kind of fiscal cash register based on 32-bit Arca2 CPU microprocessor of embedded system which match up to the national standard of tax revenue.In this thesis, initially the development condition of fiscal cash register available currently on both of domestic and foreign markets was discussed and its insufficiencies were pointed out, then the brand new kind of cash register was schemed out. The thesis details our fiscal cash register from the hardware and software. Its hardware design was analyzed from the master module, imported equipment modules, exporting equipment modules, data storage module, other components and the problem of the printer's continuous printing from interrupted position was fixed in this course; Followed by, the software design including the operating system and the application software was discussed. The kernel of Linux system was transferred to the motherboard of the novel fiscal cash register as its own operating system, in which the compilation of LCD driver and the printer driver was mainly focused on, and the application software was divided into the controlled tax software, the commercial software and power-fail protected disposal software for further discussion; Finally, the systemic reliability, security and electromagnetic compatibility were evaluated.