51 MCU I/O Introduction-EEWORLD

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[MCU Learning] Introduction to 51 MCU I/O

Reference address：51 MCU I/O Introduction

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51 Parallel IO internal structure

[Microcontroller]

Design of infrared remote control electronic password lock using AT89C2051 and AT89S52 microcontrollers

With the advancement of science and technology and the development of social economy, it has become an inevitable trend for electronic code locks to replace traditional mechanical locks. In the past, password lock systems based on microcontrollers directly stored the compiled password program in the on-chip EPROM, but

[Microcontroller]

Briefly describe the delay function of 51 single chip microcomputer

Different types of variables can be used in C programs for delay design. After experimental testing, the use of unsigned char type has more optimized code than unsigned int. Unsigned char should be used as a delay variable when used. Take a microcontroller with a crystal oscillator of 12MHz as an example. The crystal

[Microcontroller]

51 single chip microcomputer 8x8LED dot matrix screen cyclically displays numbers 0~9

The development board used is from Puzhong Technology. A dot matrix display module is composed of 8x8 LEDs with a total of 64 LEDs connected in a common cathode or common anode manner. The negative electrodes of the 8 LEDs in each row are connected together to form 8 row lines, and the positive electrodes of the 8 L

[Microcontroller]

Digital thermometer controlled by 51 single chip microcomputer

Overview The MCU part displays the temperature in real time after the simulation is turned on. Because this program is relatively simple, I will directly post the code. If you have any questions, please read my previous article. Thank you! The reference code is as follows: #include "reg51.h" char disp ={0x3f

[Microcontroller]

Digital thermometer controlled by 51 single chip microcomputer

51 MCU assembly language - matrix keyboard driver

Use this matrix keyboard as microcontroller input, plug it into P1.0~P1.6 of P1 port. I want to ask, when: When key 1 is pressed, P0.0 of P0 port outputs high level; Press the 2 key and P0.1 outputs high level; …… Just go up to the 8 key. There is also a requirement that when a key is pressed, the delay is 5

[Microcontroller]

51 MCU assembly language - matrix keyboard driver

Generation of C51HEX file and single-chip minimum system

In the previous article, we established the first single-chip C language project. However, in order to allow the compiled program to be written into the 51 chip through the programmer, we need to use the compiler to generate a HEX file first. Let's take a look at how to use KEIL uVISION2 to compile and generate a HE

[Microcontroller]

Generation of C51HEX file and single-chip minimum system

Design of a new energy-saving fluorescent lamp system based on 51 single-chip microcomputer

With the development of society and the growth of population, energy conservation has become an important social issue. Fluorescent lamps are the most widely used lamps at present, but like most lamps, once turned on, no matter how strong the external light intensity is, they can only emit light of a single inte

[Microcontroller]

Design of a new energy-saving fluorescent lamp system based on 51 single-chip microcomputer

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