Understand these three programming tools from a practical perspective to make your embedded code more elegant and efficient! 🎯 Introduction: Why Learn to Use Them Together? Imagine you are managing a smart home system: • Structs are like a storage box that neatly organizes related items together. • Unions are like a transformer that can … Read more
For the C language, the supportedcustom structure typesmainly include structures (struct), enumerations (enum), and unions (union). Among these three types, structures are data formats that encapsulate data objects with related functionalities, serving as an important means to achieve code modularization and are the most commonly used data types. Enumerations name ordinary constants, making the code … Read more
In learning the C language, arrays allow us to efficiently manage data of the same type, but real-world data often consists of a combination of different types, such as a student’s information which includes name (string), age (integer), and score (float). At this point, we need a more flexible and powerful tool to organize this … Read more
Reviewing yesterday’s interview question – how to determine the endianness of a deviceYesterday, the interviewer first asked me what endianness is, and I confidently answered that big endian stores the low-order byte at the high memory address, while little endian stores the low-order byte at the low memory address.For example, the data 0x12345678 is stored … Read more
1. Common Variables in C Language 8-bit Unsigned Long Integer Range: [0-255] 16-bit Unsigned Long Integer Range: [0-65535] 32-bit Unsigned Long Integer Range: [0-4294967295] Refer to the following: Add image caption, no more than 140 characters (optional) Note: Variable definitions should be at the beginning of the function, and no other statements should precede the … Read more
1. A pipeline achieves maximum efficiency only when it is filled with instructions, meaning that one instruction is executed per clock cycle (this refers only to single-cycle instructions).If a jump occurs in the program, the pipeline will be cleared, and it will take several clock cycles to refill the pipeline. Therefore, minimizing the use of … Read more
A detailed analysis of the definition, usage, and practical application cases of structures, unions, and enumeration types, exploring how complex data types enhance programming efficiency and code maintainability in industrial automation. Introduction The Omron NJ series PLC is an advanced machine automation controller that supports various complex data types, including structures(struct), unions(union), and enumerations(enum). These … Read more
Content Structures and unions are composite types in the C language, and we often use structures. However, some beginners may not use unions frequently and may even feel unfamiliar with them. Let’s take a brief look at unions: The keyword for defining a union in C is union. The general form for defining a union … Read more
1. Daily Chat(It is said that articles go well with music) At the beginning of the article, I have selected an older song by JJ called “Jiangnan” for everyone to reminisce. The first article in this series briefly discussed the process of converting C language to machine code, and provided an overview of why C … Read more