Forum

4

19.7.1.11DMAC Interrupt Callback FunctionThe DMAC interrupt callback function is shown below:Listing 10: Code Listing 20?9 DMAC Interrupt Callback FunctionSwipe left or right to view full content// DMA transmission complete flag volatilebool dmac0_complete_transmission_sign =false; // Transmission count (interrupt count) volatileuint16_t dmac0_transfer_count; /* DMAC interrupt callback function */ voiddmac0_callback(dmac_callback_args_t *p_args) { (void)(p_args); dmac0_complete_transmission_sign =true; dmac0_transfer_count ++; }dmac0_transfer_count is used to record the number of times DMAC interrupts occur.19.7.1.12hal_entry Entry FunctionIn the hal_entry function, the program follows these steps to execute:Call the DMAC_Init function to initialize the DMAC.Call the R_DMAC_Enable function to enable the DMAC so that it can respond to transfer requests.Call the R_DMAC_SoftwareStart function to initiate a software trigger request signal to start the ...

What is a Heterogeneous Development Board?The "heterogeneous development board" we often speak of refers to the integration of two or more different types of processors on a single board.The most common combination is: ARM Processor + FPGA Chip.?ARM: Responsible for general control and system management (such as scheduling, data processing, and other routine tasks).?FPGA: Used to accelerate specific workloads (such as high-speed parallel processing, signal computation, protocol conversion, etc.).Simple Understanding:? ARM is the "general worker," responsible for daily operations.? FPGA is the "customization expert," focusing on efficient processing in specific scenarios.The collaboration between the two ensures system flexibility while meeting high-performance requirements.What is the difference between a heterogeneous development board and a standard development board?Features of a standard development board:? Equipped with only ARM or another single type of processor? Fixed functiona...

Norton's Theorem: Equivalent Circuit AnalysisNorton's theorem is a method for simplifying circuit analysis by replacing a complex two-terminal network with a combination of a current source and a parallel resistor. With this method, even when the circuit contains voltage sources or controlled power sources, the current and voltage on the load can be accurately calculated, thereby reducing the workload of complex circuit design. For example, the characteristic of Norton's theorem is that in circuit design and learning scenarios, it is not only commonly used to evaluate the output characteristics of amplifiers but is also easily applied to the optimization of filters and amplifier circuits.This article will provide an easy-to-understand introduction ranging from the basic principles of Norton's theorem and specific solution methods to the differences from other analysis methods. At the same time, the key points for using Norton's theorem will be summarized.Basic Principles of Norton's Th...

66Hardware engineers know that a clock is rarely as simple as just "buying a component"; rather, it is a **fundamental variable that determines whether the entire system can reach its performance ceiling.**Many projects only look back to check their timing schemes when they hit performance bottlenecks in later stages:* GNSS module anti-interference instability * Microwave/Satellite link EVM or phase-locked jitter exceeding standards * Telecom equipment failing Holdover requirements after signal loss/satellite loss * Short-term phase noise in coherent systems dragging down resolutionThe root cause of these issues is often not that the "frequency point is wrong," but that the **system role was chosen incorrectly**: using a TCXO where an OCXO was required; ignoring SAW filters where front-end spectrum gating should have been done first; or mixing requirements of different levels into the same "ppm perspective" for comparison.To reduce this system-level trial-and-error cost...

**Abstract:** Based on classic lifetime models, IVCT (Inventchip Technology) conducted Robustness-Validation testing on a large sample size of its second-generation (G2) 650V SiC MOSFETs. Strictly following AEC-Q101 and ZVEI standards, the testing covered key items including HTRB, HTGB+, HV-H3TRB, and IOL. Classic reliability physics models such as Arrhenius, Hallberg-Peck, Coffin-Manson, and Eyring were introduced for data analysis.A total of 2,156 SiC MOSFET samples were subjected to extreme stress testing for up to 3,500 hours. Data analysis indicates that under typical application conditions, the predicted device lifespan reaches hundreds of years. This far exceeds the stricter 18-year lifespan standard set by IVCT for automotive-grade products, highlighting the products excellent reliability.**1. Introduction and Verification Objectives**Silicon Carbide (SiC) power devices offer significant advantages in improving system energy conversion efficiency and power density, but their re...

About Ultrasonic Guided WavesUltrasonic guided waves are ultrasonic waves that propagate along a specific path, usually within a waveguide structure formed along boundary conditions inside a structure (such as pipes, plates, etc.). They utilize the geometric characteristics and material properties of the structure to guide the propagation path of the sound waves, enabling rapid large-area scanning of the entire structure; improving inspection efficiency; and reducing inspection costs. They are particularly suitable for health monitoring and damage detection of large structures (such as pipelines, bridges, aircraft fuselages, etc.).Power amplifiers can accurately amplify the weak electrical signals output by signal generators to sufficient power to drive transducers to generate strong and stable ultrasonic guided waves. Without the enablement provided by power amplifiers, research such as long-distance detection and quantitative defect analysis using ultrasonic guided waves would be imp...

sdfafdfsfafsdfsfsafs

Introduction66666555555555555555565555