Research Of USB Printer Printing System Based On SCM

In recent years,with the continuous development of printer technology,the integration of printing system is getting higher,and the printer control also presents a diversified trend.SCM technology for the continuous development of non-PC-side printing provides a possibility to control the print directly,through the SCM data conversion method for the file.And this way that can wider use of the printer compared to the traditional computer-side printing system.Therefore,this paper aimed at the realization of USB printer based on single-chip printer system has made relevant research.Based on the understanding of printing process in Windows environment,this paper not only analyzes the composition and function of print driver system,but puts forward the process of research on printing system based on single chip computer.In this paper,raster printer with PCL instruction is chosen as the research object of the printing system,and the data of raster printing instruction based on official instruction manual and USB communication technology is analyzed.Based on the analysis of common bitmap data and raster print data,the conversion method of print data is deduced.A conversion and test platform based on Labview / Matlab / Access(L-M-A)mixed programming is constructed to complete the reading,transforming,transferring and printing of the printing data.Finally,this paper introduces the test process of the simulation printing test system.Themain research work of this paper includes the following three aspects:First of all,this paper makes an overview of the composition of the printer system.Based on the in-depth analysis of the Windows printing system,the composition and function of the print drive system is studied.Using USB bus analysis tools to build print data monitoring platform,we achieve to drive conversion data acquisition in the Windows environment.Linked with the analysis of the data of the printer and the USB communication standard,the analysis of the data flow of the printing system is completed.Secondly,the paper analyzes and summarizes the processing of data compression and conversion based on the analysis of the data of common bitmap files and the research of raster printing.Referring to the conversion process of the ink jet printer driver,the host computer part of the hybrid data conversion platform based on L-M-A is built as to achieve the conversion task of the target file directly to the print dataFinally,according to the study of the printing system,the paper designs and implements the SCM printer control system based on communication research,develops process of USB printer class,selects STM32F407,and achieves the communication of MCU in HOST mode and USB device.At the same time,through the building of the L-M-A hybrid test platform,it achieves the conversion platform of online test print data.The final test shows that the print SCM system designed in this paper can be realized directly to the reading of U-disk file and the preview of file information,be able to complete the high-speed processing and data storage in MCU,and can realize the direct printing ofa specific file.in addition,the online print test achieves developers to customize image printing.In this paper,the design and design of the printer's printer control system for printer developers to achieve a variety of printer control mode to provide a reference.The control method significantly reduces the control cost of the system.However,the study of inkjet print control system is only in the process of study,so many problems need to be discussed and resolved,including the conversion of printing data and compression.