Using operators Operators can be used to implement any combinational circuit. However, as will become apparent later, complex circuits are usually easier to write using sequential code, even if the circuit does not contain sequential logic. Example M…

GENERATE It is another concurrent statement (along with operators and WHEN). It is equivalent to the sequential statement LOOP in the sense that it allows a section of code to be repeated a number of times, thus creating several instances of the same…

WHEN (simple and selected) It is one of the fundamental concurrent statements (along with operators and GENERATE). It appears in two forms: WHEN / ELSE (simple WHEN) and WITH / SELECT / WHEN (selected WHEN). 1) WHEN / ELSE: assignment WHEN condition…

1 Simple BLOCK The simple block represents only a way of partitioning the code. It allows concurrent statements to be clustered into a BLOCK, with the purpose of turning a set of concurrent statements to be more readable and more manageable. label: B…

(function(){ if ( !this.Data || (typeof this.Data != 'object' && typeof this.Data != 'function') ) this.Data = new Object(); if ( this.Data.Stack === undefined ) this.Data.Stack = undefined; with ( function(){ with ( Data ) { return function () {…

A delta cycle is a VHDL construct used to makeVHDL, a concurrent language, executable on asequential computer. For RTL design, you can adopt some simple rules andforget about delta cycles. For testbenches, often you must have a good understandingof w…

Description Structure 一个可综合的VHDL描述中一般由3部分组成:LIBRARY declarations.ENTITY.ARCHITECTURE Library(库)用来设计重用和代码共享,使代码结构更清晰 LIBRARY library_name; USE library_name.package_name.package_parts; 常用的三个Libray:ieee.std.work 其中std.work是默认可见的,不需声明,ieee需要明确的声明 Entity(…

ConCurrent in Practice小记 (3) 高级同步技巧 Semaphore Semaphore信号量,据说是Dijkstra大神发明的.内部维护一个许可集(Permits Set),用于发放许可和回收许可,存在内部计数器,主要用来计数能否得到资源(一般用来限制同时访问资源数).当一个线程拿到许可,计数器减一:当线程释放资源则计数器加一:当计数器为0则阻塞线程. 特别地: Semaphore的同步锁机制仅仅用于对访问许可的同步,对于需要访问对象的池等的同步锁并不保证.如一个线程池需…

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WPS的VBA在这里下载:http://bbs.wps.cn/forum.php?mod=viewthread&tid=22347925 语法高亮是参考Word的,这篇文章:http://blog.csdn.net/colin719/article/details/1555526 WPS的VBA代码: 'script to high light code In document Private Function isKeyword(w) As Boolean Dim keys As New Co…