Recently, I was working on a motor drive application using the BGI MCU, and during debugging, I was plagued by a randomly occurring HARD FAULT. The issue was strange; the time it took to enter HARD FAULT was unpredictable. It could be triggered just a few seconds after connecting to USB, or it could take … Read more
Author: Lao Ma Shi Tu Microcontroller When we create a 51 microcontroller project using Keil C51, we will see a prompt as shown in the following image: Keil prompts whether to add a startup file when creating a new project Generally, you need to choose “Yes”. Of course, you can also choose not to add … Read more
After using ULINK2 with a high version of Keil, it cannot be used with a lower version due to hardware upgrades in ULINK2 by the Keil software. If you want to continue using ULINK2 with a lower version of Keil, you just need to initialize ULINK2. The specific steps are as follows: 1. Insert the … Read more
1 Preparation Before Debugging This section introduces a method to achieve serial debugging of user programs for the 51 microcontroller using the software simulation feature of Keil. This method requires no hardware emulator, and even no user circuit board is needed. All that is required is: ① Hardware. A standard computer (which needs to have … Read more
Today, we recommend a quality book — Microcontroller Principles and Applications Tutorial, 4th Edition (9787111654506),This book is revised, streamlined, adjusted, and expanded based on the previous edition, providing a detailed description of the architecture, working principles, functional components, and software and hardware application development resources of the 51 series and compatible microcontrollers. The book includes … Read more
Abstract: Based on the main issues in the current teaching of the “Principles and Applications of Microcontrollers” course, this article introduces the application of virtual simulation technology in microcontroller education. Taking the application of a seven-segment display as an example, the specific process of simulating a single-digit stopwatch using Proteus and Keil software is described. … Read more
Recently, my supervisor asked me to modify the program for the AT89C52. The code written by the previous developer is truly unworthy of praise. Have you ever seen a program with over 10,000 lines in a single .c file? This is one of them. It has an extraordinarily large while loop and four layers of … Read more
The default integer constant operations in the C51 compiler may lead to overflow errors. To avoid potential calculation errors, the data type of large integers should be specified. Keil C51 is a compiler compatible with ANSI C. The ANSI C standard specifies that the default data types for decimal integer constants are one of int, … Read more
Recently, I have encountered the issue of Chinese garbled text in the compiler. Although it does not affect the execution of the program, it always feels awkward to see a bunch of garbled text. I have a bit of OCD and always want to fix it! The reason for this problem is that everyone uses … Read more
An error occurred: FATAL ERROR L210: I/O ERROR ON INPUT FILE: EXCEPTION 0021H: PATH OR FILE NOT FOUND. Later I found out that it was due to insufficient MCU memory. After some investigation, I discovered that my KEIL was not cracked, which prevented compilation of programs larger than 2K. After cracking KEIL 2 again, loading … Read more