This book is centered on experiments. It aims to understand the basic working principles of the 51 series microcontrollers (embedded systems) based on experimental demonstrations, explanations, and explanations, master the development process of the AT89S52 microcontroller, and be able to analyze, design, and debug programs by themselves. The main experiments and basic purposes are as follows: Chapter 5 Flowing Light Experiment: Master the basic methods of experiments and the use of GPIO and table lookup methods, how to debug programs, and write programs; Chapter 6 Flowing Light Experiment Based on Timers & Interrupts: Master the principles and usage of timers and interrupts; Chapter 7 Dynamic Display, Serial Port, AD Conversion: Master the basic principles and program implementation methods of digital tube dynamic display, serial port, and interface timing (serial AD); In addition, in order to enable students to have a deeper understanding of more complex programs, Chapter 8 takes the online programmer on this experimental board as an example to introduce in detail the design and implementation process of the programmer hardware and software, and also gives a relatively detailed explanation of the corresponding PC-side software. The experiment board that comes with this book integrates digital tubes, buttons, relays, buzzers, temperature sensors, AD converters and other resources; the development environment is Keil CuVsion2, in which the program is edited, connected, and simulated, and finally a hex file is generated. The programmer is used to write the hex file into the experiment board to observe and test the operation of the program. For ease of use, this book gives a basic introduction to the basic concepts of microcontrollers, but it is mainly centered around experiments. The parts that are not covered by the experiments in this book (such as the power saving mode, watchdog, timer 2, etc. of the AT89S52 microcontroller) are basically not introduced to highlight the main purpose of this book. Interested students can refer to other books.
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