So far, protocols like I2C, SPI, and UART remain the most commonly used communication protocols in electronic embedded devices. In this article, we will analyze these three protocols to provide a clear and intuitive understanding of their functions, advantages, and limitations, supplemented with GIF animations. I2C Protocol I2C is a serial communication protocol commonly used … Read more
SPI (Serial Peripheral Interface) SPI is a high-speed, full-duplex, synchronous, serial communication bus with a 3-4 wire interface, operating in a master-slave mode, allowing multiple SPI devices to be interconnected. The SPI device that provides the SPI serial clock is the SPI master, while other devices are the SPI slaves. The SPI bus consists of … Read more
I2C Communication Protocol Basics 3.1 Introduction to Communication I²C (Inter-Integrated Circuit) is a serial communication bus designed by Philips in the early 1980s. It facilitates communication between motherboards, embedded systems, or mobile phones and peripheral devices. Due to its simplicity, it is widely used for communication between microcontrollers and sensor arrays, displays, IoT devices, EEPROMs, … Read more
This is a very basic article translated from PCB Hero. There is also a comparative article about these three buses that you can refer to: https://www.totalphase.com/blog/2021/12/i2c-vs-spi-vs-uart-introduction-and-comparison-similarities-differences/ Differences Between I2C, SPI, and UART and Their Layout Guidelines MCUs from 8-bit to 32-bit will use at least one of these protocols along with GPIO to achieve programmability … Read more
0x00 Introduction Recently, I have been learning about debugging hardware interfaces such as optical modems, routers, and cameras, but I did not make any records. Therefore, I will briefly document the learning process here for future reference. 0x01 Required Tools 1. TTL to USB converter 2. Multimeter 3. TTL to USB converter 4. SecureCRT connection … Read more
1. Qiu Qianzhang’s Lightness Skill: UART In the Legend of the Condor Heroes, Qiu Qianzhang says that UART is like my lightness skill, allowing me to float over water to cross rivers. To communicate (cross the river), set up hidden stakes in advance, and during the crossing, maintain a fixed step based on the distance … Read more
1.I2C: Inter-Integrated Circuit, abbreviated as I2C Bus. I2C mainly distinguishes slave devices through addresses, and its communication principle is relatively simple. 2.SPI: Serial Peripheral Interface, a common serial synchronous communication protocol widely used in applications. 3.UART: Universal Asynchronous Receiver/Transmitter, a serial, asynchronous, full-duplex communication protocol. GIF source from https://www.parlezvoustech.com/en/comparaison-protocoles-communication-i2c-spi-uart/ Follow the WeChat public account “Embedded … Read more
I2C Communication Protocol Basics 3.1 Communication Overview I²C (Inter-Integrated Circuit) is a serial communication bus designed by Philips in the early 1980s. It facilitates communication between motherboards, embedded systems, or mobile phones and peripheral devices. Due to its simplicity, it is widely used for communication between microcontrollers and sensor arrays, displays, IoT devices, EEPROMs, etc. … Read more
UART, I2C, RS485… These communication protocols are commonly used, but their explanations can be ambiguous. I feel it’s necessary to organize them to consolidate and differentiate. The article is a bit long, so I suggest saving it for later reference. UART stands for Universal Asynchronous Receiver-Transmitter. The UART port refers to a type of physical … Read more
1. SPI BusThe Serial Peripheral Interface (SPI) bus technology was introduced by Motorola and is a synchronous serial interface. Most MCUs (Microcontrollers) produced by Motorola, such as the 68 series MCUs, are equipped with SPI hardware interfaces. SPI is used for full-duplex, synchronous serial communication between the CPU and various peripheral devices. SPI can simultaneously … Read more