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一种蓝牙打印机的实现方案 总被引:1,自引:0,他引:1
本文介绍一种用蓝牙技术实现打印机无线打印的具体方案,以及该方案中单片机通过UART传输层本文介绍一种用蓝牙技术实现打印机无线打印的具体方案,以及该方案中单片机通过UART传输层对蓝牙模块实现控制的方法。 相似文献
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介绍了打印机与主机之间的机电性连接———接口,以及接口的电信号约定———时序的概念。着重介绍了打印功能、打印基本命令和打印驱动程序等的设计,以及围绕打印机接口发生的历史性变化。 相似文献
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为满足与日俱增的嵌入式系统的打印需求,设计了一种以片上系统型C8051F系列单片机为主机控制器的标签打印机接口模块。详细阐述了单片机与打印机之间的串行接口设计方法和斑马公司标签打印机专用的EPL2打印描述语言的使用,在掌握EPL2语言的基础上,利用KeilC编程工具进行驱动程序的编写,并给出了相应的驱动程序,实现了C8051F020单片机通过RS 232接口对一种标签打印机的控制。 相似文献
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现代智能仪器大多内置打印控制程序,对内嵌特定打印程序的编写需要对打印机的开发语言加以了解。以EPSON C43SX打印机打印控制为例,阐述了EPSON打印控制语言ESC/P指令的用法,并以DOS操作系统下开发为例,介绍了如何初始化打印机及其图形方式,最后给出了控制无中文字库的外接喷墨打印机按比例打印特定中文及图形的解决方法。 相似文献
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本文介绍一种用蓝牙技术实现打印机无线打印的具体方案,以及该方案中单片机通过UART传输层对蓝牙模块实现控制的方法. 相似文献
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介绍了基于ARM7TDMI的微型热敏打印机的系统组成。给出了由LPC2214主控芯片、西铁城LT-286打印头和多个控制电路以及相应驱动软件构成热敏打印机的工作原理和系统中各部分硬件电路的设计方案,同时给出了SPI数据发送程序及软件设计流程。 相似文献
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Compiling for distributed-memory systems 总被引:1,自引:0,他引:1
Zima H.P. Chapman B.M. 《Proceedings of the IEEE. Institute of Electrical and Electronics Engineers》1993,81(2):264-287
Compilation techniques for the source-to-source translation of programs in an extended FORTRAN 77 to equivalent parallel message-passing programs are discussed. A machine-independent language extension to FORTRAN 77, Data Parallel FORTRAN (DPF), is introduced. It allows the user to write programs for distributed-memory multiprocessing systems (DMMPS) using global addresses, and to specify the distribution of data across the processors of the machine. Message-Passing FORTRAN (MPF), a FORTRAN extension that allows the formulation of explicitly parallel programs that communicate via explicit message passing, is also introduced. Procedures and optimization techniques for both languages are discussed. Additional optimization methods and advanced parallelization techniques, including run-time analysis, are also addressed. An extensive overview of related work is given 相似文献
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Brandenburg G. Geissenberger S. Kink C. Schall N.-H. Schramm M. 《Mechatronics, IEEE/ASME Transactions on》1999,4(1):25-31
In rotary offset printing presses, mechanical line shafts are being replaced by electronic shafts which consist of synchronized position and speed-controlled AC motors driving the complete printing units or single printing cylinders. The dynamic stiffness of the multimotor system to satisfy the requirements of high printing accuracy can be achieved by high-dynamic, cascaded current, speed and position control of the the drives, which can be combined with disturbance observers in critical cases, or by direct drive technology 相似文献
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说明了网络处理器出现的背景,阐述了网络处理器的体系结构.详细介绍了网络处理器的功能技术特点和产品现状,探讨了网络处理器的各种实际应用.指出了网络处理器设计面临的问题和挑战. 相似文献
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本文介绍了一种YAM机的性能特点以及把它进一步发展成为全自动设备所涉及的有关技术,对充磁系统、DY驱动系统、摆频系统、着屏及会聚检测,最佳聚焦测试等原理做了介绍。并详细给出和分析了有关的电路。 相似文献
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航天器及其内部元器件在太空中会受到单粒子效应(SEE)带来的威胁,因此航天用电子器件在装备前必须进行抗SEE能力的测试评估。针对传统测试方法存在的测试系统程序容易在辐照过程崩溃、统计翻转数不准确、单粒子闩锁(SEL)辨别不清晰和忽略内核翻转统计等问题,设计了一种测试系统,通过片外加载与运行程序从而减少因辐照导致片内程序异常的现象;通过片外主控电路统计被测电路翻转数使统计翻转结果准确;通过主控电路控制被测电路时钟供给排除因频率增加导致电流过大而误判发生SEL的情况;通过内核指令集统计内核翻转数。实验结果表明,该测试系统可以实时全面地监测数字信号处理器(DSP)的SEE,并有效防止辐照实验器件(DUT)因SEL而失效。 相似文献
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《Proceedings of the IEEE. Institute of Electrical and Electronics Engineers》1987,75(9):1220-1234
New technologies of integration allow the design of powerful systems which may include several thousands of elementary processors. These multiprocessors may be used for a range of applications in signal and data processing. However, assuring the proper interaction of a large number of processors and the ultimate safe execution of the user programs presents a crucial scheduling problem. The scheduling of operations upon the availability of their operands has been termed the data-driven mode of execution and offers an elegant solution to the issue. This approach is described in this paper and several architectures which have been proposed or implemented (systolic arrays, data-flow machines, etc.) are examined in detail. The problems associated with data-driven execution are also studied. A multi-level approach to high-speed digital signal processing is then evaluated. 相似文献