In the world of microcontrollers, registers play a crucial role. They are not only key components for data storage and processing but also the core of various operations performed by the microcontroller. Based on type, they can be divided into program memory, data memory, and special function registers. 1. Program Memory Program memory, as the … Read more
-Begin- ModbusTCP Protocol Analysis ModbusTCP has the same message format as ModbusUDP; the difference between them is essentially the difference between TCP and UDP. Therefore, we will analyze the ModbusTCP protocol below. The differences between ModbusTCP and ModbusRtu (ModbusASCII) are shown in the figure below: As can be seen from the figure above, ModbusTCP, based … Read more
1. C Language, Assembly Language, Machine Language 1.1 C Language Code The C language is a high-level language, which cannot be directly executed by the computer and needs to be translated into machine language to be recognized and run by the computer. However, machine language consists of binary numbers, and to facilitate reading, we use … Read more
(Click the public account above to quickly follow) Source: Ruan Yifeng’s Blog http://www.ruanyifeng.com/blog/2018/01/assembly-language-primer.html Learning programming is essentially learning high-level languages, which are computer languages designed for humans. However, computers do not understand high-level languages; they must be converted into binary code by a compiler in order to run. Knowing a high-level language does not equate … Read more
1. Registers CM3 has general-purpose registers R0 to R15 and some special function registers. For general-purpose registers R0 to R12, the initial reset values are unpredictable. 2. CM3 has a set of general-purpose registers from R0 to R15. Note: Most 16-bit Thumb instructions can only access R0 to R7, while 32-bit Thumb-2 can access all … Read more
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Click the card below to follow Arm Technology Academy This article is selected from the “Arm Technology Blog” in the Extreme Technology column, written by Andy Lok, originally published on Zhihu. This article will introduce the concept and operation of registers by rewriting our Blinky program in detail. Original link: https://zhuanlan.zhihu.com/p/52855259 In this article, we … Read more
Operating Modes Thread mode: This mode is active when the processor is reset or exits from an exception. The code in this mode can be either privileged or user code, controlled by CONTROL[0]. Handler mode: This mode is entered when an exception (including interrupts) occurs, and all code in this mode has privileged access. Code … Read more