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what is cache Cache is a kind of memory, called cache. In terms of capacity: CPU《Register》Cache《DDR In terms of speed: CPU 》Register 》cache 》DDR The cache exists because the speed difference between registers and DDR is too large. The speed…

“C Runtime” requires certain conditions, which are provided by assembly. The c language mainly requires a stack when running The relationship between C language and stack: Local variables in C language are all implemented using the stack. If our assembly…

What is a watchdog Watchdog (watch dog timer watchdog timer). What is a watchdog ? Let’s imagine this scenario: There is a dog at the door of your house. This dog will be hungry at regular intervals (for example, every…

I. Introduction 1.1 Scope MODBUS is an application layer messaging protocol on layer 7 of the OSI model that provides client/server communication between devices connected to different types of buses or networks. Since its emergence in 1979 as the de…

Introduction to the MODBUS standard over serial links and TCP/IP 2020-07-28 17:55:22 Zongheng Intelligent Control 3 The standard includes MODBUS application layer protocols and service specifications used in two communication procedures: ● MODBUS on serial link MODBUS serial links depend…

4g dtu test, use Anxin to conduct transparent transmission test 2020-07-22 12:17:08 Azir 5 Each company’s 4G DTU configuration software on the market is different. This article takes the 4G DTU of Zongheng Intelligent Control as an example to achieve…

The difference between embedded and microcontroller development models The difference between development models Single-chip microcomputer: Most of the development is bare metal, the program size is small, and most are independently developed by a single programmer. Some complex products also…

Anyone who has been in contact with the Internet of Things should often hear this word – baud rate. For engineers, this must be very familiar, but for students who are just beginning to understand the Internet of Things, it…

Internet of Things, abbreviated as IoT, is an important part of the latest generation of information technology and an important development stage in the “information age”. The Internet of Things is widely used in the integration of networks through communication…

In the past few years, mobile broadband has developed rapidly and has covered more than 2 billion customers. More and more people, organizations and institutions have joined the fully connected world. In the fully connected world, except for the most…

LPWA communication technology 2020-06-15 16:02:38 Azir 9 Traditional wireless communication technology includes two categories: cellular mobile communication and short-range wireless communication technology. However, with the development of the Internet of Things, LPWA communication technology has emerged that is consistent with…

Wireless Communication Technology 2020-06-12 12:15:41 Azir 7 Another article has finished talking about wired communication technology. Let’s talk about wireless communication technology again in this article. When it comes to wireless communication in the Internet of Things, I believe most…