Introduction to the SPI Protocol SPI is the Serial Peripheral Interface. It is a synchronous serial interface technology introduced by Motorola, characterized by high speed and full-duplex synchronous communication, capable of operating at frequencies exceeding hundreds of MHz. Typically, SPI requires four lines (for duplex communication), but it can also operate with three lines (for … Read more
Introduction The NXP “FRDM-MCXN947” evaluation activity is co-hosted by Avnet and Eefocus. This content is published by Eefocus users and has been authorized for reproduction. The original article can be viewed in the Eefocus engineer community. TFT LCD Module Introduction The module is named SPI_Module_MSP3323, with a driver chip of ILI9341, and a screen size … Read more
1Module Source>>> Product Physical Display: Data Download Link:https://pan.baidu.com/s/1lSjp7ISiKhkaXwqJsEOu2g Data Extraction Code:8888 2Specifications>>> The following information can be found in the manufacturer’s screen specification document. Operating Voltage:3.3V Operating Current:20mA Module Size:44(H) x 36(V) x 2.8(D) MM Pixel Pitch:0.135(H) x 0.135(V) Driver Chip:GC9A01 Communication Protocol:SPI 3Porting Process>>> Our goal is to port the routine to the Lichuang … Read more
The SPI (Serial Peripheral Interface) is one of the most widely used synchronous serial communication protocols in embedded systems, playing a crucial role in STM32 development. Compared to I2C and UART, SPI is particularly suitable for high-speed data acquisition, memory expansion, and display driving due to its full-duplex communication, high transmission rates, and hardware slave … Read more
Implementing the SPI (Serial Peripheral Interface) driver on the STM32 microcontroller for communication with sensors. The content includes SPI initialization, data transmission, error handling, debugging techniques, and the use of logic analyzers. The code is based on the STM32Cube HAL library, suitable for the STM32F4 series (such as STM32F407), and uses a generic sensor (like … Read more
The previous article organized common communication interfaces I (RS232/RS485/USB/TYPE-C principles and differences), and in this article, we continue to organize the principles and differences of CAN, I2C, SPI, UART, and GPIO. 1.CAN Bus Interface 1)Definition CAN stands for Controller Area Network, developed by the German company BOSCH, known for its research and production of automotive … Read more
Table of Contents 1. RC522 Driver PrinciplesDriver Principles 2. Code Implementation 3. Summary & Precautions 01 — RC522 Driver Principles The RC522 is a highly integrated contactless read/write chip launched by NXP, designed specifically for Near Field Communication (NFC) and Radio Frequency Identification (RFID) applications. It is widely used in access control systems, payment terminals, … Read more
In today’s low-end digital communication applications, we frequently encounter IIC (Inter-Integrated Circuit) and SPI (Serial Peripheral Interface). The reason is that these two communication protocols are very suitable for short-distance, low-speed communication between chips. Philips (for IIC) and Motorola (for SPI) developed these two standard communication protocols based on different backgrounds and market needs. IIC … Read more
#include<stdio.h> #include<stdlib.h> #include<fcntl.h> #include<unistd.h> #include<sys/ioctl.h> #include<linux/spi/spidev.h> // Define the SPI device path #define SPI_DEVICE“/dev/spidev0.0” // Set the SPI mode unsigned char spi_mode = SPI_MODE_0; // Set the number of bits per word unsigned char spi_bits_per_mode = 8; // Set the maximum SPI transfer speed in Hz int spi_max_speed_hz = 1000000; // Initialize the SPI device … Read more
Java SPI (Service Provider Interface) is a service provider interface that provides a service discovery and loading mechanism in Java, allowing developers to define multiple implementations for an interface and dynamically discover and load these implementations at runtime. The core of the Java SPI mechanism is that it provides a way for service providers to … Read more