In our line of work, we often encounter situations where the equipment is compact, and adding a PLC is unnecessary, yet we still want to control servos. In fact, you can achieve this directly using a Wecon touch screen with Modbus communication! Today, using Huaxin servos as an example, I will walk you through the … Read more
1. What is QSPI? The SPI protocol actually includes three types of protocol interfaces: Standard SPI, Dual SPI, and Queued SPI, corresponding to 3-wire, 4-wire, and 6-wire configurations respectively. (1) Typically, when we refer to SPI, we mean Standard SPI, which has 4 signal lines: CLK, CS, MOSI, and MISO. The data line operates in … Read more
I2C is a synchronous, half-duplex serial communication bus protocol used for connecting low-speed peripherals. The main features include: Two-wire system: SCL clock line and SDA data line Multi-master and multi-slave: Supports multiple master and slave devices, but only one master is allowed at any given time. Addressing: Each slave device has a unique address Speed: … Read more
1. I2C Protocol I2C (Inter-Integrated Circuit) is a serial communication bus, known in Chinese as the integrated circuit bus. It uses a multi-master/slave architecture and was designed by Philips in the early 1980s. Each device on the I2C bus can act as a master or a slave, but typically there is only one master device … Read more
In modern electronic systems, communication between devices is a key aspect of achieving complex functionalities. SPI (Serial Peripheral Interface) is an efficient and flexible synchronous serial communication protocol widely used for data exchange between microcontrollers (MCUs) and various peripheral devices. This article will provide a detailed introduction to the working principles of the SPI protocol, … Read more
Click the blue text Follow us 1. Introduction to Serial Communication Protocol The concept of serial communication is very simple; it is a method of communication that sends and receives bytes bit by bit. Although serial communication is slower than parallel communication, which transmits data by bytes, it can achieve data transmission using only two … Read more
First, we need to know what UART is? UART (Universal Asynchronous Receiver/Transmitter) is a common asynchronous serial communication interface that is widely used in electronic circuits. The UART interface function circuit is generally integrated within the chip, and it can be used directly if the selected microcontroller chip has this function. The mystery of the … Read more
IntroductionIn server rooms, thousands of hardware devices operate day and night, but have you ever wondered:How does the CPU know the fan speed? How does the memory module “sense” its own temperature? These seemingly simple functions rely on a so-calledI2C “invisible communicator”. It acts like an invisible “highway”, enabling efficient collaboration among chips, sensors, memory, … Read more
Detailed Explanation of Modbus-RTU Message Structure and Common Function Codes Modbus is a serial communication protocol that was published by Modicon (now Schneider Electric) in 1979 for communication with programmable logic controllers (PLCs). The Modbus protocol has now become the industry standard for communication protocols in the field of industrial control and is commonly used … Read more
The Modbus protocol is a widely used serial communication protocol in the field of industrial automation, primarily designed to facilitate data exchange between different devices (such as PLCs, sensors, instruments, and frequency converters). Its fundamental working principles can be understood from the following core dimensions: 1. Master-Slave Communication Structure Modbus employs a “master-slave” communication model, … Read more