Single chip microcomputer timer T0 counts seconds C51 program + circuit-EEWORLD

Collect

Schematic diagram:

The c51 microcontroller program is as follows:

#include

#define UCHAR unsigned char

#define UINT unsigned int

UCHAR table[16] = {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};

FLY counter;

FLY timer;

void inittime(void)

{

timer=0;

contain=0;

TMOD=0X01;

TH0=0X4C;

TL0=0X00;

EA=1;

ET0=1;

TR0=1;

}

void Delay_1ms(UCHAR i) //1ms delay

{

FLY x,j;

for(j=0;j

for(x=0;x<=148;x++);

}

void segdisplay(void)

{

P0 = 0; //Blanking

P2 = 6; //The 7th digital tube displays

P0 = table[(conter / 10)%10]; //Get the tens digit of i here

Delay_1ms(5); //Display the next number after 0.5 seconds delay

P0 = 0; //Blanking

P2 = 7; //The 8th digital tube display

P0 = table[conter % 10]; //Get the unit digit of i here

Delay_1ms(5);

P0=0;

}

void main()

{

inittime();

while(1)

segdisplay();

}

void timer_t0(void) interrupt 1

{

TH0=0X4C;

TL0=0X00;

timer++;

if(timer==20)

{

timer=0;

contain++;

}

if(conter==100)

contain=0;

}

Keywords：MCU Reference address：Single chip microcomputer timer T0 counts seconds C51 program + circuit

Previous article：51 MCU matrix button circuit diagram + program
Next article：C51 MCU timer T2 countdown program + circuit diagram

Popular Resources
Popular amplifiers

Recommended Content

Latest Microcontroller Articles

Learn ARM development(16)
There are many things to learn about ARM, and interrupts are definitely something that needs to be learned. Since the CPU introduced interrupts, it has truly entered the multi-tasking system and greatly improved work efficiency. ...
Learn ARM development(17)
Because all embedded systems use interrupts, how does my S3C44B0 interrupt the process? Then I need to understand the whole process. To understand it in depth, the best way is to write a program ...
Learn ARM development(18)
Last time, we have learned about the interrupt handling process of ARM and how to set the interrupt function. So, does it work like this? The answer is no. Because S3C44B0 has several registers that control ...
Embedded system debugging simulation tool
After the embedded hardware system is designed, it needs to be debugged. Whether it is hardware debugging, software debugging or program solidification, debugging simulation tools are needed. ...
A small question that has been bothering me recently has finally been solved~~
Recently, I have not been able to understand the concept of drivers very well. Sometimes I can get a feel for it by combining some USB examples written by others, but because the ARM system does not directly explain the pins like the microcontroller ...
Learn ARM development (1)
Learn ARM development (2)
Learn ARM development (4)
Learn ARM development (6)

He Limin Column Microcontroller and Embedded Systems Bible

Professor at Beihang University, dedicated to promoting microcontrollers and embedded systems for over 20 years.

MoreSelected Circuit Diagrams

Change More Related Popular Components

MorePopular Articles

MoreDaily News

Guess you like