2020年5月10日 · In this post, we talk about the most commonly used data types in VHDL. We will also look at how we perform conversions between these types. VHDL is considered to be a strongly typed language. This means every signal or port which we declare must use either one of the predefined VHDL types or a custom type which we have created.

2020年4月2日 · In VHDL, we define datatypes while initializing signals, variables, constants, and generics. Also, VHDL allows users to define their own data types according to their needs, and those are called user-defined data types. User-defined data types can be defined in a separate file and shared as a library.

2017年2月20日 · There are four classes of types in VHDL: 标量类型：表示一个单独的数值，或者枚举类型中的枚举值。 scalar types: represent a single numeric value, or in the case of enumerated types, an enumeration value. 复合类型：表示一些值的集合。 composite types: represent a collection of values.

2013年2月12日 · VHDL has a set of standard data types (predefined / built-in). It is also possible to have user defined data types and subtypes. Some of the predefined data types in VHDL are: BIT, BOOLEAN and INTEGER. The STD_LOGIC and STD_LOGIC_VECTOR data types are not built-in VHDL data types, but are defined in the standard logic 1164 package of the IEEE ...

2024年6月25日 · In this article we have seen what are Hardware Description Languages (HDLs), what is VHDL, what is Verilog, comparison between VHDL and Verilog , different features of VHDL, what are elements of VHDL, modeling styles in VHDL , VHDL data types, objects, operators, advantages and disadvantages of VHDL.

2020年5月15日 · Learn how to create custom data types in a VHDL based design, including subtypes, enumerated types, record types and arrays

2014年6月9日 · 本文深入探讨了VHDL中的数据类型，包括标量类型、复合类型、存取类型、文件类型及其预定义和用户自定义数据类型，如布尔量、位、位矢量、字符、整数、自然数、实数、字符串、时间类型等。 VHDL是一种强数据类型语言。 型，并且相同数据类型的量才能互相传递和作用。 标量类型（SCALAR TYPE）； 复合类型（COMPOSITE TYPE）； 存取类型（ACCESS TYPE）； 文件类型（FILES TYPE） 预定义数据类型、 用户自定义数据类型. 等中作逻辑比较 …

2023年3月14日 · 如前面的笔记所述，在 VHDL语言 中信号、变量、常数都要指定数据类型。 为此，VHDL提供了多种标准的数据类型。 另外，为使用户设计方便，还可以由用户自定义数据类型。 这样使语言的描述能力及自由度更进一步提高，从而为系统高层次的仿真提供了必要手段。 同时，VHDL语言数据类型的定义相当严格，不同类型之间的数据不能直接代入，而且，即使数据类型相同，而位长不同时也不能直接代入。 这样，为了熟练地使用VHDL语言编写程序，必须准确 …

2023年6月21日 · This extensive blog post will look into the many data types offered by VHDL, from the most fundamental types, such as Boolean and Integer, to the more sophisticated types, such as arrays and records. We will look at their meanings, uses, and operations and offer real-world examples to show how to use them.

VHDL Data Types What is a “Data Type”? This is a classification objects/items/data that defines the possible set of values which the objects/items/data belonging to that type may assume. E.g. (VHDL) integer, bit, std_logic, std_logic_vector Other languages (float, double, int , char etc)