五笔编码查询 V0.1

近来学五笔,发现总有怕打不出字的心理,就萌生了写个五笔编码查询小软件的想法。词库用的FCITX 的,一开始是用grep和sed直接搜索词库,感觉不方便,所以又给加了个简单的GTK图形界面。这个软件只是Just Work,功能比较简单,^_^ 。

下载:wubi-dict-0.1.tar.gz

 

新博客,新网名

博客从blogbus 迁移到is-programmer,并开始用新的网名llpk00(注意这里l是字母,0是数字,嘿嘿),停止以前的gosman ,^_^ 。

最近...

好久没写博客了,当上网都成了一种奢望的时候,我哪还能整博客哦,以后博客很难更新了。现在的我不让上网,不让睡懒觉,剩下的唯一追求就是吃饭了,“吃饭不积极,思想有问题”,呵呵。

每天都从叠被子开始新的一天,我要说的是:我讨厌叠被子,我恨叠被子!!!!!!!


随机文章:

开始实习 2006-08-25
通宵ing 2006-08-16

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Quartus II 中使用VIM编辑器

Quartus II的编辑器不支持中文,实在够垃圾的,呵呵。以前我都是在外部编辑器中写代码,再导入到Quartus中,这样实在是麻烦,尤其是在调试时,两边“忙”,很容易出问题。今天好好看了一下Quartus II的选项,原来Quartus II支持外部编辑器,于是把编辑器换成了VIM,哈哈。这下好了,可以在Quartus II中用中文注释了。而且调试时,双击出错的地方会自动调转到VIM编辑器,呵呵。

怎么设置??直接看图片吧,呵呵。使用的VIM命令是:

gvim --remote-tab-silent %l %f




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Verilog与C语言的比较

在一个课件上看到的,觉得总结的非常好,就放到博客上。

Verilog HDL是在C语言的基础上发展起来的,保留了C语言的结构特点。

  • C语言由函数组成,Verilog由模块(module)组成
  • C语言通过函数名及其端口变量实现调用,Verilog也通过模块名和端口变量实现调用
  • C语言有主函数main(),Verilog的个module均等价,但必有一个顶层模块,包含芯片系统与外界的所有I/O信号
  • C语言是顺序执行,而Verilog的所有module均并发执行
  • C语言与Verilog语法相似

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专用集成电路

本书是一本有关专用集成电路(ASIC)的综合性和权威性书籍。书中叙述了VLSI系统设计的最新方法。利用商业化工具以及预先设计好的单元库已使得 ASIC设计成为速度最快、成本最低而且错误最少的一种IC设计方法,因而ASIC设计方法已迅速在工业界的各个应用领域得到推广。
   本书介绍了半定制和可编程的ASIC。在对每种ASIC类型的数字逻辑设计与物理特性的基本原理进行描述后,讨论了ASIC逻辑设计设计输入、逻辑综合、 仿真以及测试,并进一步讲述了相应的物理设计——划分、布图规划、布局以及布线。此外,本书对在ASIC设计中需要了解的各方面知识以及必需的工作都有详 尽叙述。
   本书可作为大学高年级和研究生教材,也是ASIC领域工程技术人员的理想参考书。

我的评论:学ASIC的经典教材了,看这本书才知道FPGA在IC中的地位。全书分为三部分:ASIC介绍、ASIC逻辑设计、ASIC物理设计。我还没看完,等全看完再多说吧,呵呵。

豆瓣链接:专用集成电路


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半年没写博客了

快半年没写博客了,呵呵。一直在忙毕业设计,也许是借口吧,呵呵。这半年发生了很多事情,不管是学习上的,还是私人上的事情^_^。毕业设计还在继续努力中,PCB已经送到工厂了,真怕出错了,呵呵。因为毕设好久没玩 Linux 了,前几天实验室的电脑坏了,就把寝室的电脑搬到了实验室,也因此和 Debian 告别了,用了一年多(??应该有吧)的Debian就此删了,真有点舍不得。等我下次买笔记本了,再相见吧,Debian。

这半年一直在补以前欠下的知识,但还是感觉落下什么,什么都不会,呵呵。这也许就是对自己掌握知识的不自信吧。还有就是冒着风险没学用Protel画PCB,而是坚持学的Allegro。Allegro的软件操作还是很有意思的,一看就是从UNIX工作站起源的软件,呵呵,处处体现着软件设计的巧妙(还不如说是奇怪的操作,呵呵)。

以后要坚持写博客了,不然工作了,就更没机会写博客了。以后的内容应该会以毕设为主了,Linux先放一边吧。还有三个月,就毕业了,奋斗吧。


随机文章:

搬家完毕 2007-04-10
幻灭走了 2006-08-20

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当了次群众演员

4月3号那天,被人莫名其妙的拉去当了一次群众演员,一开始还兴致勃勃的,没多久就意兴阑珊了,呵呵,群众演员也不是那么好当的。一天下来就拍了个镜头,导演的耐心还真让人佩服。还是说说电影吧,拍的是抗日题材的电影《南京!南京!》,导演是陆川,好像刘烨也到现场了,就离我两三米远吧,我把眼镜摘了,懒得戴上,也就没一睹真容了,呵呵。我们饰演的是国民党守城士兵,衣服老破了,不过御寒还是很适合的,呵呵。那天天气还真搞笑,一会刮风,一会下雪,一会下雨的。脸还被涂的比包公还黑,总之惨不忍睹。还是看看照片吧。

相关链接:
1、陆川新片《南京!南京!》
2、刘烨:《南京!南京!》是我拍得最用心的电影


随机文章:

VHDL实习 2006-08-31
开始实习 2006-08-25
GNOME崩溃了 2006-06-19
彻底失眠了 2005-12-20

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field-prgrammable(现场可编程)的定义

虽然现在FPGA(现场可编程门阵列)这么火,但我相信一定有很多人,不知道FP(现场可编程)的定义吧。我把在维基百科(这几天竟然能上了,真奇怪啊)找到的定义摘录下来,做个备忘,呵呵。

An electronic device or embedded system is said to be field-programmable or in-place programmable if its firmware (stored in non-volatile memory, such as ROM) can be modified "in the field," without disassembling the device or returning it to its manufacturer.

随机文章:

新的开始 2007-10-20
用上LumaQQ了 2006-03-05

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VCC、VDD、VEE、VSS 区别

好不容易找到对这些电源标号区别的详细解释,呵呵。现在网上的那些解释不是错误就是不详尽,呵呵。找个时间,把它翻译成中文的,呵呵。

Almost all integrated circuits (ICs) have at least two pins which connect to the power rails of the circuit they are installed in. These are known as the IC's power supply pins. However, the labeling of the pins varies by IC family and manufacturer.

Typical supply pin labeling
BJT FET      
VCC VDD V VS Positive supply voltage
VEE VSS V− VS− Negative supply voltage

The simplest labels are V and V−. However, internal design and historical tradition have led to a variety of other labels being used. Also, V and V− may be confused with the and − voltage inputs to ICs like op amps.

Sometimes one of the power supply pins will be referred to as ground. In digital logic, this is nearly always the negative pin; in analog integrated circuits, it is most likely to be a pin intermediate in voltage between the most positive and most negative pins [citation needed].

Double subscript notation uses similar looking placeholders with subscripts. In that notation the subscripted letters denote two points.

History

VCC (note: lower case is often used instead of subscript, e.g. "Vcc") is an electronics designation that refers to voltage from a power supply connected to the "collector" terminal of a bipolar transistor. In an NPN bipolar junction transistor, it would be VCC, while in a PNP transistor, it would be −VCC. There is debate over the origins of the double letter subscript naming convention. One proposal is that it originated as an abbreviation of the supply voltage for a common collector amplifier with the other power supply names mimicking this fashion. Double letters may also have been used to clearly indicate that a power supply voltage is being referred to.

In general, double letter subscripts refer to power supply voltages. For example, VEE refers to the "emitter" voltage as supplied by the power supply pin. In NMOS logic, VSS refers to the "source" voltage, and VDD is the "drain" voltage likewise.

Within a circuit, single letter subscripts refer to that voltage relative to ground; for example, VC is the "collector" voltage relative to ground. Two different letters indicate the voltage between two terminals; for example: VBE is the "base" to "emitter" voltage drop, while VCE is the "collector" to "emitter" voltage.

Modern use

CMOS ICs have generally borrowed the NMOS convention of VDD for positive and VSS for negative despite the fact that both positive and negative supply rails actually go to source terminals (positive supply goes to PMOS sources, negative supply to NMOS sources). ICs using bipolar transistors have VCC (positive) and VEE (negative) power supply pins.

In single supply systems (e.g., most modern digital and analog circuits) the negative power supply pin is also commonly referred to as GND. In "split rail" supply systems (e.g., older analog circuits) positive, negative and ground power supply pins are used.

More advanced chips will often have pins carrying voltage levels for more specialized functions in or out of the chip and these are generally labeled with some abbreviation of their purpose. For example VBUS for the 5 volt supply needed for a bus-powered USB device or Vref for the reference voltage for an analog-to-digital converter.

From: http://www.answers.com/topic/ic-power-supply-pin?cat=technology

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