51 MCU-Interrupt-EEWORLD

Collect

#include ＜reg52.h＞

#include ＜intrins.h＞

unsigned int dd, i;

void key() interrupt 0{

if(i == 0)

P2 = dd;

else{

dd = _roll_(dd,1);

P2 = dd;

}

i++;

}

void main(){

EA = 1; //Interrupt enable general control bit enabled

EX0 = 1; //External interrupt 0 interrupt enable bit

IT0 = 1; //0 means low level trigger, 1 means falling edge trigger

TR0 = 1; //1 means the timer/counter is working

dd = 0xfe;

i = 0;

while(1);

}

// By circularly shifting left, each time the INT0 interrupt is triggered, one light turns on.

//Definition of _crol_:

Reference address：51 MCU-Interrupt

Previous article：51 MCU-Timer
Next article：51 MCU-button

Recommended ReadingLatest update time:2024-11-16 16:48

Practical analysis of 8051 microcontroller (taking STC89C52RC as an example) | 09 - LED dot matrix display of numbers

1 LED dot matrix LED dot matrix is a display device composed of light-emitting diodes. It can be seen everywhere in our daily electrical appliances and is widely used in bus station announcers, advertising screens, etc. The 8*8 dot matrix is usually used more often, and then multiple 8*8 dot matrices can be used t

[Microcontroller]

51 MCU Interrupt

51 MCU interrupt principle The concept of interruption: When the CPU is processing an event A, another event B occurs and requests the CPU to process it quickly (interrupt occurs). Then the CPU will suspend the current work (event A) and execute event B (interrupt response and interrupt service). After event B is comp

[Microcontroller]

51 MCU C Language Tutorial (I) Create the first project

　　Learning single-chip microcomputers is not an easy task. First, you need to buy expensive programmers and simulators, and second, you need to learn programming languages. There are also many types of single-chip microcomputers, which is a headache. Among the many single-chip microcomputers, the 51 architecture chip

[Microcontroller]

51 MCU C Language Tutorial (I) Create the first project

51 single chip simple waveform generator (sine wave, sawtooth wave, triangle wave)

The following is the source code of the simple waveform generator of 51 single-chip microcomputer: #include AT89X52.h #include math.h #define ADDR1 0x2c //MAX5820LEUA sbit key_sin=P1^0; sbit key_tran=P1^2; sbit key_tooth=P1^4; sbit SCL = P2 ^ 0; sbit SDA = P2 ^ 1; unsigned char code sin = //sine table

[Microcontroller]

51 single chip simple waveform generator (sine wave, sawtooth wave, triangle wave)

Design and implementation of microwave radiation counting control unit based on 51 single chip microcomputer

Microwave radiometer is a microwave receiver that uses microwaves for remote sensing and thus detects ground objects. It is widely used in detecting the atmosphere, ocean, vegetation and soil. As an important part of the microwave radiometer, the data processing and control unit undertakes all the driving and contro

[Microcontroller]

Design and implementation of microwave radiation counting control unit based on 51 single chip microcomputer

Realizing DC motor speed regulation through 51 microcontroller

1. Project background and purpose With the widespread use of various industrial production equipment and mechanical equipment, the research and application of DC motor speed regulation technology has attracted more and more attention and has broad application prospects. This project uses the 51 microcontroller to real

[Microcontroller]

51 MCU Review 001

1. Change the font and keyword color settings of Keil Uvision3: Modify the order as follows 1 Open edit 2 Open edit configuration at the bottom 3 Open colars 4 Select 8051 edit c file to modify the size and keyword coloring issues of the C language. From http://zhidao.baidu.com/question/137561189.html 2. Bit de

[Microcontroller]

Optimization Method of Soft Clock Design in MCS-51 Single Chip Microcomputer

0 Introduction With the popularization of microcomputer applications, microcomputer measurement and control systems with MCS-51 single-chip microcomputer as the core can be seen everywhere. To meet user requirements, these systems usually have the function of digital display clock. Since MCS-51 contains two ti

[Microcontroller]

Popular Resources
Popular amplifiers