8253的初始化程序举例: 例1：选择2号计数器，工作在3方式，计数初值为533H（2个字节），采用二进制计数。其初始化程序段为 MOV DX，307H ；命令口 MOV AL，10110110B ；2号计数器的初始化命 令字 OUT DX，AL ；写入命令寄存器 MOV DX，306H ；2号计数器数据口 MOV AX，533H ；计数初值 OUT DX，AL ；选送低字节到2号计数器 MOV AL，AH ；取高字节送AL OUT DX，AL ；后送高字节到2号计数器
上传时间： 2015-06-24
上传用户：zhangzhenyu
zemax源码： This DLL models an anamorphic aspheric surface. This surface is essentially an even aspheric surface with different terms for the x and y directions. The sag is given by: Z = ((CX*x*x)+(CY*y*y)) / (1 + sqrt(1-((1+KX)*CX*CX*x*x)-((1+KY)*CY*CY*y*y))) + AR*( (1 - AP)*x*x + (1 + AP)*y*y )^2 + BR*( (1 - BP)*x*x + (1 + BP)*y*y )^3 + CR*( (1 - CP)*x*x + (1 + CP)*y*y )^4 + DR*( (1 - DP)*x*x + (1 + DP)*y*y )^5 Note the terms AR, BR, CR, and DR ... have units of length to the -3, -5, -7, and -9 power. The terms AP, BP, CP, and DP are dimensionless. The surface is rotationally symmetric only if AP = BP = CP = DP == 0 and CX = CY and KX = KY.
标签： surface This essentially anamorphic
上传时间： 2015-07-25
上传用户：lht618
MULTIDIMENSIONAL SCALING in matlab by Mark Steyvers 1999 ％needs optimization toolbox ％Modified by Bruce Land ％--Data via globals to anaylsis programs ％--3D plotting with color coded groups ％--Mapping of MDS space to spike train temporal profiles as described in ％Aronov, et.al. "Neural coding of spatial phase in V1 of the Macaque" in ％press J. Neurophysiology
标签： MULTIDIMENSIONAL optimization Modified Steyvers
上传时间： 2015-08-26
上传用户：kytqcool
RTOS-嵌入式系统微内核概念和实现 Realtime Operating Systems Concepts and Implementation of Microkernels for Embedded Systems Dr. Jürgen Sauermann, Melanie Thelen
标签： Implementation Microkernels Operating Concepts
上传时间： 2014-01-03
上传用户：zgu489
This paper presents several low-latency mixed-timing FIFO (first-in–first-out) interfaces designs that interface systems on a chip working at different speeds. The connected systems can be either synchronous or asynchronous. The designs are then adapted to work between systems with very long interconnect delays, by migrating a single-clock solution by Carloni et al. (1999, 2000, and 2001) (for “latency-insensitive” protocols) to mixed-timing domains. The new designs can be made arbitrarily robust with regard to metastability and interface operating speeds. Initial simulations for both latency and throughput are promising.
标签： mixed-timing low-latency interfaces first-out
上传时间： 2015-10-08
上传用户：dapangxie
The CUBA library provides new implementation of four general-purpose multidimensional integration algorithms: Vegas, Suave, Divonne, and Cuhre. Suave is a new algorithm, Divonne is a known algorithm to which important details have been added, and Vegas and Cuhre are new implementations of existing algorithms with only few improvements over the original versions. All four algorithms can integrate vector integrands and have very similar Fortran, C/C++, and Mathematica interfaces.
标签： multidimensional general-purpose implementation integration
上传时间： 2014-09-09
上传用户：gxf2016
英语词汇起源及妙记 1、Chemistry 化学 古代的炼金术士们总想找到一种方法，将低贱的金属变为金子。现在通过原子裂变的原理表明，他们的这种想法并非一般人们想象的那么愚蠢。古埃及人入侵欧洲后，将他们所研究的炼金术，连同其命名al-kimia一起传入欧洲。后来，这个词变成alchemy，“炼金的人”叫做alchemist，最后成了chemistry。“化学”的概念就是从“炼金术”演变来的.
上传时间： 2013-12-08
上传用户：hxy200501
功能为neighborhood components analysis，a quick matlab implementation of NCA (see Goldberger et al, NIPS04).
标签： neighborhood components analysis
上传时间： 2013-12-11
上传用户：tianjinfan
This is the tlc0834 driver, welcome everybody criticism to point out mistakes This is the tlc0834 driver, welcome everybody criticism to point out mistakes
标签： This 0834 criticism everybody
上传时间： 2015-12-14
上传用户：caixiaoxu26
MSP430把nRF905的“TRX_CE”引脚置为高电平，“TX_CE引脚拉为低电平后就刻蚀结社数据，本设计中CPU在设定的35s内一直判断Nrf9051“DR”引脚是否便变高个，若为高则证明接收到了有效数据，可以退出接收模式，弱一致没有接受2到，待时间到时也退出接接受是模块，退出后在待机模块，CPU通过SPI总线把NRF905内部的接收数据寄存器中数据读出，即接收道德有效数据。 便携接受部分程序时，有一点应该注意，很多资料中都没有提到，就是CPU在MOSI信号线上发出读命令字节后“MISO”信号线上nRF905会自动返回一字节数据，本本身的状态寄存器信息，后续的接收数据并不会自动跟着输出，只有CPU在MOSI上输出一个字节（可以是随意值），nRF905才会在“MISO”上返回一个字节，CPU再发，nRF905再满会，直到读完为止。
上传时间： 2014-11-26
上传用户：jhksyghr
