Hello everyone, I am Jide Cheng. Today I will share content related to the SPI protocol. Table of Contents Introduction Table of Contents First, let’s talk about UART SPI Communication Protocol Characteristics of SPI Mode Numbers Multi-Slave Mode Advantages and Disadvantages Programming Implementation First, Let’s Talk About UART I previously wrote an article on UART, … Read more
Buses, buses, you always get caught up in them. All signals in this world are the same, but there are thousands of buses, which can be quite a headache. In general, there are three types of buses: internal buses, system buses, and external buses. The internal bus connects various peripheral chips within the microcomputer to … Read more
Do you want to delve into the Linux kernel and write your own drivers? This tutorial will take you from scratch to mastering the core skills of Linux driver development, and through rich practical cases, you will quickly acquire the ability to write various types of drivers! 1. Preparation: Environment Setup and Tool Installation This … Read more
So far, protocols such as 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 typically … Read more
We recommend following the public account below to learn more about electronic technology knowledge! 01Introduction to SD Cards SD cards (Secure Digital Memory Card) are a new generation of memory devices based on semiconductor flash memory, developed from MMC. They are widely used in portable devices such as digital cameras, personal digital assistants (PDAs), and … Read more
1. Module Source>>> Module Physical Display: Data Download Link: https://pan.baidu.com/s/1U9r32qeS2jOANB0SNwtwnw Data Extraction Code: 8888 2. Specifications>>> Refer to manufacturer documentation for the following information: Operating Voltage: 3.3V Operating Current: 15MA Module Size: 27.3 x 27.8 MM Pixel Size: 128(H) x 64(V) RGB Driver Chip: SSD1306 Communication Protocol: SPI Pin Count: 7 Pins (2.54mm pitch header) … Read more
1. UART (Universal Asynchronous Receiver/Transmitter) The host and slave must connect at least three wires: RX, TX, and GND. TX is used for sending data, while RX is for receiving data (the transmission and reception are not on the same line, hence it is full-duplex). Basic Characteristics: Asynchronous Communication: No shared clock signal, relies on … Read more
The SPI protocol is a commonly used high-speed, full-duplex, synchronous serial communication protocol, widely used for data exchange with sensors (such as temperature sensors, pressure sensors, etc.), data storage and retrieval from storage devices (such as EEPROM, FLASH memory), control of display modules (such as LCD screens, OLED screens, etc.), communication with wireless communication modules … Read more
SPI (Serial Peripheral Interface) is a synchronous serial communication protocol widely used in embedded systems and peripheral communication. SPI follows a one-master, multiple-slave communication method. Based on its operating modes and extended functionalities, SPI can be categorized into the following types based on hardware connection methods: 1. Standard SPI, commonly referred to as SPI, it … Read more
Introduction During the project development process, it was found that the actual baud rate configured for the MCAL SPI did not match the clock frequency captured by the logic analyzer. The actual frequency was only half of the configured value. This article documents the troubleshooting process for this issue. MCAL Configuration Check The baud rate … Read more