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# 电气工程代写|FPGA Verilog programming代写|ECE564 Passing ‘Defines

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## 电气工程代写|FPGA Verilog programming代写|Passing ‘Defines

Like parameters, ‘defines can be used as labels representing a fixed constant. But unlike parameters, ‘defines are considered to have global reach, meaning that they manifest across layers of a hierarchy implicitly, and there lies both the power and the potential trap. ‘Defines declared within one module could override those of another, but since there are no explicit directions to do so, this could come as a surprise to you potentially after many hours of puzzled debug. Further, which ‘define overrides which is not even necessarily easily predicted. Unlike parameters, ‘defines are directives to the synthesis tool thus the “‘”’ tick, and any particular ‘define takes the final value that the synthesis software encounters as it compiles the modules this is a little confusing I know, since there is a separate, complete compile stage performed by the vendor tool. Granted, the synthesis or simulation software will probably warn you if it encounters two ‘define definitions to the same label, but often warnings are missed. So, the final value for a ‘define that has the same name in multiple modules depends on the order of compile. This is usually configurable in the synthesis or simulation tool, but can get messy all the same. Finally, what happens if the compile order is different between simulation and synthesis? Obviously the compiled FPGA will not operate as simulated. Very bad.

If you’ve gotten the idea that we’re trying to make you nervous about using ‘defines, good. That said, ‘defines are very powerful and useful, and luckily there is way to use them that is relatively foolproof: pull all ‘define definitions into one include file (we’ll talk about include files next). Now you only have to make sure that this top-level include file is at the top of the compile order. Using one really geared towards system-wide configuration, and it is useful having all system configurations collected together in one file. For one thing, different system configurations can be associated each with one specific file.

## 电气工程代写|FPGA Verilog programming代写|Include files

We introduced the concept of include files in the previous section. Like ‘defines, include files are communicated as a compiler directive, and so the form for invoking it is to add a “”” tick. Like so:
‘Include directives allow us to incorporate the contents of entire files into a module of our design. The most common example is to define system-wide configuration information, as explained in the previous section. Since the synthesis or simulation software does not treat this file as a module within the verilog hierarchy, it does not need to use a “. $v$ ” extension. Thus, in our example, we used “.h”- the common file extension used for header files in the C family of languages.

Note that the file name can be an entire path name (ending in the file name itself).

Note also that if the included file contains only ‘define definitions, the include directive can occur anywhere in the host module-generally near the beginning for visibility. If, however, the included file contains any parameter or defparam statements, then the include directive must be placed after the module declaration i.e., after the module port list.

## 电气工程代写IFPGA VERILOG PROGRAMMING代 写IINCLUDE FILES

‘包含指令允许我们将整个文件的内容合并到我们设计的模块中。最常见的示例是定义系统范围的配置信息，如上一节所述。由于综合或仿真软件不将此文件视为

## Matlab代写

MATLAB 是一种用于技术计算的高性能语言。它将计算、可视化和编程集成在一个易于使用的环境中，其中问题和解决方案以熟悉的数学符号表示。典型用途包括：数学和计算算法开发建模、仿真和原型制作数据分析、探索和可视化科学和工程图形应用程序开发，包括图形用户界面构建MATLAB 是一个交互式系统，其基本数据元素是一个不需要维度的数组。这使您可以解决许多技术计算问题，尤其是那些具有矩阵和向量公式的问题，而只需用 C 或 Fortran 等标量非交互式语言编写程序所需的时间的一小部分。MATLAB 名称代表矩阵实验室。MATLAB 最初的编写目的是提供对由 LINPACK 和 EISPACK 项目开发的矩阵软件的轻松访问，这两个项目共同代表了矩阵计算软件的最新技术。MATLAB 经过多年的发展，得到了许多用户的投入。在大学环境中，它是数学、工程和科学入门和高级课程的标准教学工具。在工业领域，MATLAB 是高效研究、开发和分析的首选工具。MATLAB 具有一系列称为工具箱的特定于应用程序的解决方案。对于大多数 MATLAB 用户来说非常重要，工具箱允许您学习应用专业技术。工具箱是 MATLAB 函数（M 文件）的综合集合，可扩展 MATLAB 环境以解决特定类别的问题。可用工具箱的领域包括信号处理、控制系统、神经网络、模糊逻辑、小波、仿真等。